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pdfSUBCHAPTER K—METAL AND NONMETAL MINE SAFETY
AND HEALTH
PART 56—SAFETY AND
STANDARDS—SURFACE
AND NONMETAL MINES
HEALTH
METAL
56.4331
56.4400
56.4401
56.4402
56.4430
Subpart A—General
Sec.
56.1 Purpose and scope.
56.2 Definitions.
56.1000 Notification of commencement of
operations and closing of mines.
Subpart B—Ground Control
56.3000
Definitions.
56.3130
56.3131
Wall, bank, and slope stability.
Pit or quarry wall perimeter.
56.3200
56.3201
56.3202
56.3203
Correction of hazardous conditions.
Location for performing scaling.
Scaling tools.
Rock fixtures.
56.4500 Heat sources.
56.4501 Fuel lines.
56.4502 Battery-charging stations.
56.4503 Conveyor belt slippage.
56.4530 Exits.
56.4531 Flammable or combustible
storage buildings or rooms.
MINING METHODS
WELDING/CUTTING/COMPRESSED GASES
PRECAUTIONS
56.3400 Secondary breakage.
56.3401 Examination of ground conditions.
56.3430 Activity between machinery or
equipment and the highwall or bank.
Subpart C—Fire Prevention and Control
Definitions.
Abandoned electric circuits.
PROHIBITIONS/PRECAUTIONS/HOUSEKEEPING
56.4100 Smoking and use of open flames.
56.4101 Warning signs.
56.4102 Spillage and leakage.
56.4103 Fueling internal combustion engines.
56.4104 Combustible waste.
56.4130 Electric substations and liquid storage facilities.
FIREFIGHTING EQUIPMENT
56.4200 General requirements.
56.4201 Inspection.
56.4202 Fire hydrants.
56.4203 Extinguisher recharging or replacement.
56.4230 Self-propelled equipment.
Subpart D—Air Quality and Physical
Agents
AIR QUALITY
56.5001 Exposure limits for airborne contaminants.
56.5002 Exposure monitoring.
56.5005 Control of exposure to airborne contaminants.
56.5006 Restricted use of chemicals.
Subpart E—Explosives
56.6000
Definitions.
STORAGE
56.6100 Separation of stored explosive material.
56.6101 Areas around explosive material
storage facilities.
56.6102 Explosive material storage practices.
56.6130 Explosive material storage facilities.
56.6131 Location of explosive material storage facilities.
56.6132 Magazine requirements.
56.6133 Powder chests.
FIREFIGHTING PROCEDURES/ALARMS/DRILLS
TRANSPORTATION
56.4330 Firefighting, evacuation, and rescue
procedures.
56.6200 Delivery to storage or blast site
areas.
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liquid
56.4600 Extinguishing equipment.
56.4601 Oxygen cylinder storage.
56.4602 Gauges and regulators.
56.4603 Closure of valves.
56.4604 Preparation of pipelines or containers.
APPENDIX I TO SUBPART C OF PART 56—NATIONAL CONSENSUS STANDARDS
SCALING AND SUPPORT
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Use restrictions.
Storage tank foundations.
Safety can use.
Storage facilities.
INSTALLATION/CONSTRUCTION/MAINTENANCE
PROCEDURES
56.4000
56.4011
Firefighting drills.
FLAMMABLE AND COMBUSTIBLE LIQUIDS AND
GASES
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Pt. 56
30 CFR Ch. I (7–1–19 Edition)
56.6201 Separation of transported explosive
material.
56.6202 Vehicles.
56.6203 Locomotives.
56.6204 Hoists.
56.6205 Conveying explosives by hand.
USE
56.6300 Control of blasting operations.
56.6301 Blasthole obstruction check.
56.6302 Separation of explosive material.
56.6303 Initiation preparation.
56.6304 Primer protection.
56.6305 Unused explosive material.
56.6306 Loading, blasting, and security.
56.6307 Drill stem loading.
56.6308 Initiation systems.
56.6309 Fuel oil requirements for ANFO.
56.6310 Misfire waiting period.
56.6311 Handling of misfires.
56.6312 Secondary blasting.
ELECTRIC BLASTING
56.6400 Compatibility of electric detonators.
56.6401 Shunting.
56.6402 Deenergized circuits near detonators.
56.6403 Branch circuits.
56.6404 Separation of blasting circuits from
power source.
56.6405 Firing devices.
56.6406 Duration of current flow.
56.6407 Circuit testing.
56.6904 Smoking and open flames.
57.6905 Protection of explosive material.
Subpart F—Drilling and Rotary Jet Piercing
DRILLING
56.7002 Equipment defects.
56.7003 Drill area inspection.
56.7004 Drill mast.
56.7005 Augers and drill stems.
56.7008 Moving the drill.
56.7009 Drill helpers.
56.7010 Power failures.
56.7011 Straightening crossed cables.
56.7012 Tending drills in operation.
56.7013 Covering or guarding drill holes.
56.7018 Hand clearance.
56.7050 Tool and drill steel racks.
56.7051 Loose objects on the mast or drill
platform.
56.7052 Drilling positions.
56.7053 Moving hand-held drills.
56.7055 Intersecting holes.
56.7056 Collaring in bootlegs.
ROTARY JET PIERCING
56.7801 Jet drills.
56.7802 Oxygen hose lines.
56.7803 Lighting the burner.
56.7804 Refueling.
56.7805 Smoking and open flames.
56.7806 Oxygen intake coupling.
56.7807 Flushing the combustion chamber.
NONELECTRIC BLASTING
56.6500
56.6501
56.6502
Subpart G [Reserved]
Damaged initiating material.
Nonelectric initiation systems.
Safety fuse.
Subpart H—Loading, Hauling, and
Dumping
EXTRANEOUS ELECTRICITY
TRAFFIC SAFETY
56.6600 Loading practices.
56.6601 Grounding.
56.6602 Static electricity dissipation during
loading.
56.6603 Air gap.
56.6604 Precautions during storms.
56.6605 Isolation of blasting circuits.
56.9100 Traffic control.
56.9101 Operating speeds and control of
equipment.
56.9102 Movement of independently operating rail equipment.
56.9103 Clearance on adjacent tracks.
56.9104 Railroad crossings.
EQUIPMENT/TOOLS
TRANSPORTATION OF PERSONS AND MATERIALS
56.6700 Nonsparking tools.
56.6701 Tamping and loading pole requirements.
56.9200 Transporting persons.
56.9201 Loading, hauling, and unloading of
equipment or supplies.
56.9202 Loading and hauling large rocks.
MAINTENANCE
56.6800
56.6801
56.6802
56.6803
SAFETY DEVICES, PROVISIONS, AND PROCEDURES FOR ROADWAYS, RAILROADS, AND
LOADING AND DUMPING SITES
Storage facilities.
Vehicle repair.
Bulk delivery vehicles.
Blasting lines.
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GENERAL REQUIREMENTS
56.6900 Damaged or deteriorated explosive
material.
56.6901 Black powder.
56.6902 Excessive temperatures.
56.6903 Burning explosive material.
56.9300 Berms or guardrails.
56.9301 Dump site restraints.
56.9302 Protection against moving or runaway railroad equipment.
56.9303 Construction of ramps and dumping
facilities.
56.9304 Unstable ground.
56.9305 Truck spotters.
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Mine Safety and Health Admin., Labor
Pt. 56
56.9306 Warning devices for restricted clearances.
56.9307 Design, installation, and maintenance of railroads.
56.9308 Switch throws.
56.9309 Chute design.
56.9310 Chute hazards.
56.9311 Anchoring stationary sizing devices.
56.9312 Working around drawholes.
56.9313 Roadway maintenance.
56.9314 Trimming stockpile and muckpile
faces.
56.9315 Dust control.
56.9316 Notifying the equipment operator.
56.9317 Suspended loads.
56.9318 Getting on or off moving equipment.
56.9319 Going over, under, or between railcars.
56.9330 Clearance for surface equipment.
56.12005 Protection of power conductors
from mobile equipment.
56.12006 Distribution boxes.
56.12007 Junction box connection procedures.
56.12008 Insulation and fittings for power
wires and cables.
56.12010 Isolation or insulation of communication conductors.
56.12011 High-potential electrical conductors.
56.12012 Bare signal wires.
56.12013 Splices and repairs of power cables.
56.12014 Handling energized power cables.
56.12016 Work
on
electrically-powered
equipment.
56.12017 Work on power circuits.
56.12018 Identification of power switches.
56.12019 Access to stationary electrical
equipment or switchgear.
56.12020 Protection
of
persons
at
switchgear.
56.12021 Danger signs.
56.12022 Authorized persons at major electrical installations.
56.12023 Guarding electrical connections and
resistor grids.
56.12025 Grounding circuit enclosures.
56.12026 Grounding
transformer
and
switchgear enclosures.
56.12027 Grounding mobile equipment.
56.12028 Testing grounding systems.
56.12030 Correction of dangerous conditions.
56.12032 Inspection and cover plates.
56.12033 Hand-held electric tools.
56.12034 Guarding around lights.
56.12035 Weatherproof lamp sockets.
56.12036 Fuse removal or replacement.
56.12037 Fuses in high-potential circuits.
56.12038 Attachment of trailing cables.
56.12039 Protection of surplus trailing cables.
56.12040 Installation of operating controls.
56.12041 Design of switches and starting
boxes.
56.12042 Track bonding.
56.12045 Overhead powerlines.
56.12047 Guy wires.
56.12048 Communication
conductors
on
power poles.
56.12050 Installation of trolley wires.
56.12053 Circuits powered from trolley wires.
56.12065 Short circuit and lightning protection.
56.12066 Guarding trolley wires and bare
powerlines.
56.12067 Installation of transformers.
56.12068 Locking transformer enclosures.
56.12069 Lightning protection for telephone
wires and ungrounded conductors.
56.12071 Movement or operation of equipment near high-voltage power lines.
Subpart I—Aerial Tramways
56.10001 Filling buckets.
56.10002 Inspection and maintenance.
56.10003 Correction of defects.
56.10004 Brakes.
56.10005 Track cable connections.
56.10006 Tower guards.
56.10007 Falling object protection.
56.10008 Riding tramways.
56.10009 Riding loaded buckets.
56.10010 Starting precautions.
Subpart J—Travelways
56.11001 Safe access.
56.11002 Handrails and toeboards.
56.11003 Construction and maintenance of
ladders.
56.11004 Portable rigid ladders.
56.11005 Fixed ladder anchorage and toe
clearance.
56.11006 Fixed ladder landings.
56.11007 Wooden components of ladders.
56.11008 Restricted clearance.
56.11009 Walkways along conveyors.
56.11010 Stairstep clearance.
56.11011 Use of ladders.
56.11012 Protection for openings around
travelways.
56.11013 Conveyor crossovers.
56.11014 Crossing moving conveyors.
56.11016 Snow and ice on walkways and
travelways.
56.11017 Inclined fixed ladders.
56.11025 Railed landings, backguards, and
other protection for fixed ladders.
56.11026 Protection for inclined fixed ladders.
56.11027 Scaffolds and working platforms.
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Subpart K—Electricity
56.12001
56.12002
56.12003
56.12004
Circuit overload protection.
Controls and switches.
Trailing cable overload protection.
Electrical conductors.
Subpart L—Compressed Air and Boilers
56.13001 General requirements for boilers
and pressure vessels.
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Pt. 56
30 CFR Ch. I (7–1–19 Edition)
56.13010 Reciprocating-type air compressors.
56.13011 Air receiver tanks.
56.13012 Compressor air intakes.
56.13015 Inspection of compressed-air receivers and other unfired pressure vessels.
56.13017 Compressor discharge pipes.
56.13019 Pressure system repairs.
56.13020 Use of compressed air.
56.13021 High-pressure hose connections.
56.13030 Boilers.
Subpart M—Machinery and Equipment
56.14000
Subpart N—Personal Protection
Definitions.
SAFETY DEVICES AND MAINTENANCE
REQUIREMENTS
56.14100 Safety defects; examination, correction and records.
56.14101 Brakes.
56.14102 Brakes for rail equipment.
56.14103 Operators’ stations.
56.14104 Tire repairs.
56.14105 Procedures during repairs or maintenance.
56.14106 Falling object protection.
56.14107 Moving machine parts.
56.14108 Overhead drive belts.
56.14109 Unguarded conveyors with adjacent
travelways.
56.14110 Flying or falling materials.
56.14111 Slusher, backlash guards and securing.
56.14112 Construction and maintenance of
guards.
56.14113 Inclined conveyors: backstops or
brakes.
56.14114 Air valves for pneumatic equipment.
56.14115 Stationary grinding machines.
56.14116 Hand-held power tools.
56.14130 Roll-over
protective
structures
(ROPS) and seat belts.
56.14131 Seat belts for haulage trucks.
56.14132 Horns and back-up alarms.
SAFETY PRACTICES AND OPERATIONAL
PROCEDURES
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56.14213 Ventilation and shielding for welding.
56.14214 Train warnings.
56.14215 Coupling or uncoupling cars.
56.14216 Backpoling.
56.14217 Securing parked railcars.
56.14218 Movement of equipment on adjacent tracks.
56.14219 Brakeman signals.
APPENDIX I TO SUBPART M OF PART 56—NATIONAL CONSENSUS STANDARDS
56.14200 Warnings prior to starting or moving equipment.
56.14201 Conveyor start-up warnings.
56.14202 Manual cleaning of conveyor pulleys.
56.14203 Application of belt dressing.
56.14204 Machinery lubrication.
56.14205 Machinery, equipment, and tools.
56.14206 Securing movable parts.
56.14207 Parking procedures for unattended
equipment.
56.14208 Warning devices.
56.14209 Safety procedures for towing.
56.14210 Movement of dippers, buckets, loading booms, or suspended loads.
56.14211 Blocking equipment in a raised position.
56.14212 Chains, ropes, and drive belts.
56.15001 First aid materials.
56.15002 Hard hats.
56.15003 Protective footwear.
56.15004 Eye protection.
56.15005 Safety belts and lines.
56.15006 Protective equipment and clothing
for hazards and irritants.
56.15007 Protective equipment or clothing
for welding, cutting, or working with
molten metal.
56.15014 Eye protection when operating
grinding wheels.
56.15020 Life jackets and belts.
Subpart O—Materials Storage and
Handling
56.16001 Stacking and storage of materials.
56.16002 Bins, hoppers, silos, tanks, and
surge piles.
56.16003 Storage of hazardous materials.
56.16004 Containers for hazardous materials.
56.16005 Securing gas cylinders.
56.16006 Protection of gas cylinder valves.
56.16007 Taglines, hitches, and slings.
56.16009 Suspended loads.
56.16010 Dropping materials from overhead.
56.16011 Riding hoisted loads or on the hoist
hook.
56.16012 Storage of incompatible substances.
56.16013 Working with molten metal.
56.16014 Operator-carrying overhead cranes.
56.16015 Work or travel on overhead crane
bridges.
56.16016 Lift trucks.
Subpart P—Illumination
56.17001 Illumination
areas.
of
surface
Subpart Q—Safety Programs
56.18002 Examination of working places.
56.18006 New employees.
56.18009 Designation of person in charge.
56.18010 First aid.
56.18012 Emergency telephone numbers.
56.18013 Emergency communications system.
56.18014 Emergency medical assistance and
transportation.
56.18020 Working alone.
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Mine Safety and Health Admin., Labor
Subpart R—Personnel Hoisting
56.19000
Application.
HOISTS
56.19001 Rated capacities.
56.19002 Anchoring.
56.19003 Driving mechanism connections.
56.19004 Brakes.
56.19005 Locking mechanism for clutch.
56.19006 Automatic hoist braking devices.
56.19007 Overtravel and overspeed devices.
56.19008 Friction hoist synchronizing mechanisms.
56.19009 Position indicator.
56.19010 Location of hoist controls.
56.19011 Drum flanges.
56.19012 Grooved drums.
56.19013 Diesel- and other fuel-injectionpowered hoists.
56.19014 Friction hoist overtravel protection.
56.19017 Emergency braking for electric
hoists.
56.19018 Overtravel by-pass switches.
WIRE ROPES
56.19021 Minimum rope strength.
56.19022 Initial measurement.
56.19023 Examinations.
56.19024 Retirement criteria.
56.19025 Load end attachments.
56.19026 Drum end attachment.
56.19027 End attachment retermination.
56.19028 End attachment replacement.
56.19030 Safety device attachments.
elevated
head
CONVEYANCES
56.19045
56.19049
56.19050
56.19054
Metal bonnets.
Hoisting persons in buckets.
Bucket requirements.
Rope guides.
SIGNALING
56.19090 Dual signaling systems.
56.19091 Signaling instructions to hoist operator.
56.19092 Signaling from conveyances.
56.19093 Standard signal code.
56.19094 Posting signal code.
56.19095 Location of signal devices.
56.19096 Familiarity with signal code.
56.19100 Shaft landing gates.
56.19101 Stopblocks and derail switches.
56.19102 Shaft guides.
56.19103 Dumping facilities and loading
pockets.
56.19104 Clearance at shaft stations.
56.19105 Landings with more than one shaft
entrance.
56.19106 Shaft sets.
56.19107 Precautions for work in compartment affected by hoisting operation.
56.19108 Posting warning signs during shaft
work.
56.19109 Shaft inspection and repair.
56.19110 Overhead protection for shaft deepening work.
56.191111 Shaft-sinking ladders.
INSPECTION AND MAINTENANCE
HOISTING PROCEDURES
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56.19069 Entering and leaving conveyances.
56.19070 Closing cage doors or gates.
56.19071 Riding in skips or buckets.
56.19072 Skips and cages in same compartment.
56.19073 Hoisting during shift changes.
56.19074 Riding the bail, rim, bonnet, or
crosshead.
56.19075 Use of open hooks.
56.19076 Maximum speeds for hoisting persons in buckets.
56.19077 Lowering buckets.
56.19078 Hoisting buckets from the shaft
bottom.
56.19079 Blocking mine cars.
56.19080 Hoisting tools, timbers, and other
materials.
56.19081 Conveyances not in use.
56.19083 Overtravel backout device.
SHAFTS
HEADFRAMES AND SHEAVES
56.19035 Headframe design.
56.19036 Headframe height.
56.19037 Fleet angles.
56.19038 Platforms around
sheaves.
Pt. 56
56.19055 Availability of hoist operator for
manual hoists.
56.19056 Availability of hoist operator for
automatic hoists.
56.19057 Hoist operator’s physical fitness.
56.19058 Experienced hoist operators.
56.19061 Maximum hoisting speeds.
56.19062 Maximum acceleration and deceleration.
56.19063 Persons allowed in hoist room.
56.19065 Lowering
conveyances
by
the
brakes.
56.19066 Maximum riders in a conveyance.
56.19067 Trips during shift changes.
56.19068 Orderly conduct in conveyances.
56.19120 Procedures for inspection, testing,
and maintenance.
56.19121 Recordkeeping.
56.19122 Replacement parts.
56.19129 Examinations and tests at beginning of shift.
56.19130 Conveyance shaft test.
56.19131 Hoist conveyance connections.
56.19132 Safety catches.
56.19133 Shaft.
56.19134 Sheaves.
56.19135 Rollers in inclined shafts.
Subpart S—Miscellaneous
56.20001 Intoxicating
cotics.
beverages
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and
nar-
§ 56.1
30 CFR Ch. I (7–1–19 Edition)
56.20002 Potable water.
56.20003 Housekeeping.
56.20005 Carbon tetrachloride.
56.20008 Toilet facilities.
56.20009 Tests for explosive dusts.
56.20010 Retaining dams.
56.20011 Barricades and warning signs.
56.20013 Waste receptacles.
56.20014 Prohibited areas for food and beverages.
AUTHORITY: 30 U.S.C. 811.
SOURCE: 50 FR 4054, Jan. 29, 1985, unless
otherwise noted.
Subpart A—General
§ 56.1
Purpose and scope.
This part 56 sets forth mandatory
safety and health standards for each
surface metal or nonmetal mine, including open pit mines, subject to the
Federal Mine Safety and Health Act of
1977. The purpose of these standards is
the protection of life, the promotion of
health and safety, and the prevention
of accidents.
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§ 56.2
Definitions.
The following definitions apply in
this part. In addition definitions contained in any subpart of part 56 apply
in that subpart. If inconsistent with
the general definitions in this section,
the definition in the subpart will apply
in that subpart:
American Table of Distances means the
current edition of ‘‘The American
Table of Distances for Storage of Explosives’’ published by the Institute of
Makers of Explosives.
Approved means tested and accepted
for a specific purpose by a nationally
recognized agency.
Attended means presence of an individual or continuous monitoring to
prevent unauthorized entry or access.
Authorized person means a person approved or assigned by mine management to perform a specific type of duty
or duties or to be at a specific location
or locations in the mine.
Barricaded means obstructed to prevent the passage of persons, vehicles,
or flying materials.
Barrier means a material object, or
objects that separates, keeps apart, or
demarcates in a conspicuous manner
such as cones, a warning sign, or tape.
Berm means a pile or mound of material along an elevated roadway capable
of moderating or limiting the force of a
vehicle in order to impede the vehicle’s
passage over the bank of the roadway.
Blast area means the area in which
concussion (shock wave), flying material, or gases from an explosion may
cause injury to persons. In determining
the blast area, the following factors
shall be considered:
(1) Geology or material to be blasted.
(2) Blast pattern.
(3) Burden, depth, diameter, and
angle of the holes.
(4) Blasting experience of the mine.
(5) Delay system, powder factor, and
pounds per delay.
(6) Type and amount of explosive material.
(7) Type and amount of stemming.
Blast site means the area where explosive material is handled during loading, including the perimeter formed by
the loaded blastholes and 50 feet (15.2
meters) in all directions from loaded
holes. A minimum distance of 30 feet
(9.1 meters) may replace the 50-foot
(15.2-meter) requirement if the perimeter of loaded holes is demarcated with
a barrier. The 50-foot (15.2-meter) and
alternative 30-foot (9.1-meter) requirement also apply in all directions along
the full depth of the hole.
Blasting agent means any substance
classified as a blasting agent by the
Department of Transportation in 49
CFR 173.114(a) (44 FR 31182, May 31,
1979) which is incorporated by reference. This document is available for
inspection at each Metal and Nonmetal
Safety and Health District Office of the
Mine Safety and Health Administration, and may be obtained from the
U.S. Government Printing Office,
Washington, DC 20402.
Blasting area means the area near the
blasting operations in which concussion or flying material can reasonably
be expected to cause injury.
Blasting cap means a detonator which
is initiated by a safety fuse.
Blasting circuit means the electrical
circuit used to fire one or more electric
blasting caps.
Blasting switch means a switch used
to connect a power source to a blasting
circuit.
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Mine Safety and Health Admin., Labor
§ 56.2
Booster means any unit of explosive
or blasting agent used for the purpose
of perpetuating or intensifying an initial detonation.
Capped fuse means a length of safety
fuse to which a blasting cap has been
attached.
Capped primer means a package or
cartridge of explosives which is specifically designed to transmit detonation
to other explosives and which contains
a detonator.
Circuit breaker means a device designed to open and close a circuit by
nonautomatic means and to open the
circuit automatically on a predetermined overcurrent setting without injury to itself when properly applied
within its rating.
Combustible means capable of being
ignited and consumed by fire.
Combustible liquids means liquids having a flash point at or above 100 °F (37.8
°C). They are divided into the following
classes:
(1) Class II liquids—those having
flash points at or above 100 °F (37.8 °C)
and below 140 °F (60 °C).
(2) Class IIIA liquids—those having
flash points at or above 140 °F (60 °C)
and below 200 °F (93.4 °C).
(3) Class IIIB liquids—those having
flash points at or above 200 °F (93.4 °C).
Combustible material means a material
that, in the form in which it is used
and under the conditions anticipated,
will ignite, burn, support combustion,
or release flammable vapors when subjected to fire or heat. Wood, paper, rubber, and plastics are examples of combustible materials.
Company official means a member of
the company supervisory or technical
staff.
Competent person means a person having abilities and experience that fully
qualify him to perform the duty to
which he is assigned.
Conductor means a material, usually
in the form of a wire, cable, or bus bar,
capable of carrying an electric current.
Delay connector means a non-electric
short interval delay device for use in
delaying blasts which are initiated by
detonating cord.
Detonating cord means a flexible cord
containing a solid core of high explosives.
Detonator means any device containing a detonating charge that is
used to initiate an explosive and includes but is not limited to blasting
caps, electric blasting caps and nonelectric instantaneous or delay blasting caps.
Distribution box means a portable apparatus with an enclosure through
which an electric circuit is carried to
one or more cables from a single incoming feed line, each cable circuit
being connected through individual
overcurrent protective devices.
Electric blasting cap means a detonator designed for and capable of being
initiated by means of an electric current.
Electrical grounding means to connect
with the ground to make the earth part
of the circuit.
Employee means a person who works
for wages or salary in the service of an
employer.
Employer means a person or organization which hires one or more persons to
work for wages or salary.
Emulsion means an explosive material
containing substantial amounts of
oxidizers dissolved in water droplets,
surrounded by an immiscible fuel.
Explosive means any substance classified as an explosive by the Department
of Transportation in 49 CFR 173.53,
173.88, and 173.100 which are incorporated by reference. Title 49 CFR is
available for inspection at each Metal
and Nonmetal Safety and Health district office of the Mine Safety and
Health Administration, and may be obtained from the U.S. Government
Printing Office, Washington, DC 20402.
Explosive material means explosives,
blasting agents, and detonators.
Face or bank means that part of any
mine where excavating is progressing
or was last done.
Fire resistance rating means the time,
in minutes or hours, that an assembly
of materials will retain its protective
characteristics or structural integrity
upon exposure to fire.
Flammable means capable of being
easily ignited and of burning rapidly.
Flammable gas means a gas that will
burn in the normal concentrations of
oxygen in the air.
Flammable liquid means a liquid that
has a flash point below 100 °F (37.8 °C),
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§ 56.2
30 CFR Ch. I (7–1–19 Edition)
a vapor pressure not exceeding 40
pounds per square inch (absolute) at 100
°F (37.8 °C), and is known as a Class I
liquid.
Flash point means the minimum temperature at which sufficient vapor is
released by a liquid or solid to form a
flammable vapor-air mixture at atmospheric pressure.
High potential means more than 650
volts.
Highway means any public street,
public alley, or public road.
Hoist means a power driven windlass
or drum used for raising ore, rock, or
other material from a mine, and for
lowering or raising persons and material.
Igniter cord means a fuse, cordlike in
appearance, which burns progressively
along its length with an external flame
at the zone of burning, and is used for
lighting a series of safety fuses in the
desired sequence.
Insulated means separated from other
conducting surfaces by a dielectric substance permanently offering a high resistance to the passage of current and
to disruptive discharge through the
substance. When any substance is said
to be insulated, it is understood to be
insulated in a manner suitable for the
conditions to which it is subjected.
Otherwise, it is, within the purpose of
this definition, uninsulated. Insulating
covering is one means for making the
conductor insulated.
Insulation means a dielectric substance offering a high resistance to the
passage of current and to a disruptive
discharge through the substance.
Laminated partition means a partition
composed of the following material and
minimum nominal dimensions: 1⁄2-inchthick plywood, 1⁄2-inch-thick gypsum
wallboard, 1⁄8-inch-thick low carbon
steel, and 1⁄4-inch-thick plywood, bonded together in that order (IME–22 Box).
A laminated partition also includes alternative construction materials described in the Institute of Makers of
Explosives (IME) Safety Library Publication No. 22, ‘‘Recommendations for
the Safe Transportation of Detonators
in a Vehicle with Other Explosive Materials’’ (May 1993), and the ‘‘Generic
Loading Guide for the IME–22 Container’’ (October 1993). The IME is located at 1120 19th Street NW., Suite 310,
Washington, DC 20036–3605; 202–429–9280;
https://www.ime.org. This incorporation
by reference has been approved by the
Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR
part 51. Copies are available at MSHA’s
Office of Standards, Regulations, and
Variances, 201 12th Street South, Arlington, VA 22202–5452; 202–693–9440; and
at all Metal and Nonmetal Mine Safety
and Health District Offices, or available for inspection at the National Archives and Records Administration
(NARA). For information on the availability of this material at NARA, call
202–741–6030,
or
go
to:
http://
www.archives.gov/federallregister/
codeloflfederallregulations/
ibrllocations.html.
Lay means the distance parallel to
the axis of the rope in which a strand
makes one complete turn about the
axis of the rope.
Loading means placing explosive material either in a blasthole or against
the material to be blasted.
Low potential means 650 volts or less.
Magazine means a facility for the
storage of explosives, blasting agents,
or detonators.
Major electrical installation means an
assemblage of stationary electrical
equipment for the generation, transmission, distribution, or conversion of
electrical power.
Mantrip means a trip on which persons are transported to and from a
work area.
Mill includes any ore mill, sampling
works, concentrator, and any crushing,
grinding, or screening plant used at,
and in connection with, an excavation
or mine.
Misfire means the complete or partial
failure of a blasting charge to explode
as planned.
Mobile equipment means wheeled,
skid-mounted, track-mounted, or railmounted equipment capable of moving
or being moved.
Multipurpose dry-chemical fire extinguisher means an extinguisher having a
rating of at least 2–A:10–B:C and containing a nominal 4.5 pounds or more of
dry-chemical agent.
Noncombustible material means a material that, in the form in which it is
used and under the conditions anticipated, will not ignite, burn, support
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Mine Safety and Health Admin., Labor
§ 56.2
combustion, or release flammable vapors when subjected to fire or heat.
Concrete, masonry block, brick, and
steel are examples of noncombustible
materials.
Non-electric delay blasting cap means a
detonator with an integral delay element and capable of being initiated by
miniaturized detonating cord.
Overburden means material of any
nature, consolidated or unconsolidated,
that overlies a deposit of useful materials or ores that are to be mined.
Overload means that current which
will cause an excessive or dangerous
temperature in the conductor or conductor insulation.
Permissible means a machine, material, apparatus, or device that has been
investigated, tested, and approved by
the Bureau of Mines or the Mine Safety
and Health Administration and is
maintained in permissible condition.
Potable water means water which
shall meet the applicable minimum
health requirements for drinking water
established by the State or community
in which the mine is located or by the
Environmental Protection Agency in 40
CFR part 141, pages 169–182 revised as of
July 1, 1977. Where no such requirements are applicable, the drinking
water provided shall conform with the
Public Health Service Drinking Water
Standards, 42 CFR part 72, subpart J,
pages 527–533, revised as of October 1,
1976. Publications to which references
are made in this definition are hereby
made a part hereof. These incorporated
publications are available for inspection at each Metal and Nonmetal Mine
Safety and Health District Office of the
Mine Safety and Health Administration.
Powder chest means a substantial,
nonconductive
portable
container
equipped with a lid and used at blasting sites for explosives other than
blasting agents.
Primer means a unit, package, or cartridge of explosives used to initiate
other explosives or blasting agents, and
which contains a detonator.
Reverse-current protection means a
method or device used on direct-current circuits or equipment to prevent
the flow of current in the reverse direction.
Rock fixture means any tensioned or
nontensioned device or material inserted into the ground to strengthen or
support the ground.
Roll protection means a framework,
safety canopy or similar protection for
the operator when equipment overturns.
Safety can means an approved container, of not over five gallons capacity, having a spring-closing lid and
spout cover.
Safety fuse means a flexible cord containing an internal burning medium by
which fire is conveyed at a continuous
and uniform rate for the purpose of firing blasting caps or a black powder
charge.
Safety switch means a sectionalizing
switch that also provides shunt protection in blasting circuits between the
blasting switch and the shot area.
Scaling means removal of insecure
material from a face or highwall.
Secondary safety connection means a
second connection between a conveyance and rope, intended to prevent the
conveyance from running away or falling in the event the primary connection fails.
Shaft means a vertical or inclined
shaft, a slope, incline or winze.
Short circuit means an abnormal connection of relatively low resistance,
whether made accidentally or intentionally, between two points of different potential in a circuit.
Slurry (as applied to blasting). See
‘‘Water gel.’’
Storage facility means the entire class
of structures used to store explosive
materials. A ‘‘storage facility’’ used to
store blasting agents corresponds to a
BATF Type 4 or 5 storage facility.
Storage tank means a container exceeding 60 gallons in capacity used for
the storage of flammable or combustible liquids.
Stray current means that portion of a
total electric current that flows
through paths other than the intended
circuit.
Substantial construction means construction of such strength, material,
and workmanship that the object will
withstand all reasonable shock, wear,
and usage, to which it will be subjected.
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§ 56.1000
30 CFR Ch. I (7–1–19 Edition)
Suitable means that which fits, and
has the qualities or qualifications to
meet a given purpose, occasion, condition, function, or circumstance.
Travelway means a passage, walk or
way regularly used and designated for
persons to go from one place to another.
Water gel or Slurry (as applied to
blasting) means an explosive or blasting agent containing substantial portions of water.
Wet drilling means the continuous application of water through the central
hole of hollow drill steel to the bottom
of the drill hole.
Working place means any place in or
about a mine where work is being performed.
[69 FR 38837, June 29, 2004, as amended at 80
FR 52986, Sept. 2, 2015]
PROCEDURES
§ 56.1000 Notification of commencement of operations and closing of
mines.
The owner, operator, or person in
charge of any metal and nonmetal
mine shall notify the nearest MSHA
Metal and Nonmetal Mine Safety and
Health district office before starting
operations, of the approximate or actual date mine operation will commence. The notification shall include
the mine name, location, the company
name, mailing address, person in
charge, and whether operations will be
continuous or intermittent.
When any mine is closed, the person
in charge shall notify the nearest district office as provided above and indicate whether the closure is temporary
or permanent.
[50 FR 4054, Jan. 29, 1985, as amended at 60
FR 33723, June 29, 1995; 60 FR 35695, July 11,
1995; 71 FR 16667, Apr. 3, 2006]
Subpart B—Ground Control
AUTHORITY: 30 U.S.C. 811
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SOURCE: 51 FR 36197, Oct. 8, 1986, unless
otherwise noted.
§ 56.3000
Definitions.
The following definitions apply in
this subpart.
Travelway. A passage, walk, or way
regularly used or designated for persons to go from one place to another.
[51 FR 36197, Oct. 8, 1986, as amended at 69 FR
38840, June 29, 2004]
MINING METHODS
§ 56.3130 Wall, bank, and slope stability.
Mining methods shall be used that
will maintain wall, bank, and slope stability in places where persons work or
travel in performing their assigned
tasks. When benching is necessary, the
width and height shall be based on the
type of equipment used for cleaning of
benches or for scaling of walls, banks,
and slopes.
§ 56.3131 Pit or quarry wall perimeter.
In places where persons work or travel in performing their assigned tasks,
loose or unconsolidated material shall
be sloped to the angle of repose or
stripped back for at least 10 feet from
the top of the pit or quarry wall. Other
conditions at or near the perimeter of
the pit or quarry wall which create a
fall-of-material hazard to persons shall
be corrected.
SCALING AND SUPPORT
§ 56.3200 Correction of hazardous conditions.
Ground conditions that create a hazard to persons shall be taken down or
supported before other work or travel
is permitted in the affected area. Until
corrective work is completed, the area
shall be posted with a warning against
entry and, when left unattended, a barrier shall be installed to impede unauthorized entry.
§ 56.3201 Location for performing scaling.
Scaling shall be performed from a location which will not expose persons to
injury from falling material, or other
protection from falling material shall
be provided.
§ 56.3202 Scaling tools.
Where manual scaling is performed, a
scaling bar shall be provided. This bar
shall be of a length and design that will
allow the removal of loose material
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Mine Safety and Health Admin., Labor
without exposing the person
forming this work to injury.
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§ 56.3203
per-
Rock fixtures.
(a) For rock bolts and accessories addressed in ASTM F432–95, ‘‘Standard
Specification for Roof and Rock Bolts
and Accessories,’’ the mine operator
shall—
(1) Obtain a manufacturer’s certification that the material was manufactured and tested in accordance with
the specifications of ASTM F432–95;
and
(2) Make this certification available
to an authorized representative of the
Secretary and to the representative of
miners.
(b) Fixtures and accessories not addressed in ASTM F432–95 may be used
for ground support provided they—
(1) Have been successful in supporting the ground in an area with
similar strata, opening dimensions and
ground stresses in any mine; or
(2) Have been tested and shown to be
effective in supporting ground in an
area of the affected mine which has
similar strata, opening dimensions, and
ground stresses as the area where the
fixtures are expected to be used. During the test process, access to the test
area shall be limited to persons necessary to conduct the test.
(c) Bearing plates shall be used with
fixtures when necessary for effective
ground support.
(d) The diameter of finishing bits
shall be within a tolerance of plus or
minus 0.030 inch of the manufacturer’s
recommended hole diameter for the anchor used. When separate finishing bits
are used, they shall be distinguishable
from other bits.
(e) Damaged or deteriorated cartridges of grouting material shall not
be used.
(f) When rock bolts tensioned by
torquing are used as a means of ground
support,
(1) Selected tension level shall be—
(i) At least 50 percent of either the
yield point of the bolt or anchorage capacity of the rock, whichever is less;
and
(ii) No greater than the yield point of
the bolt or anchorage capacity of the
rock.
§ 56.3401
(2) The torque of the first bolt, every
tenth bolt, and the last bolt installed
in each work area during the shift shall
be accurately determined immediately
after installation. If the torque of any
fixture tested does not fall within the
installation torque range, corrective
action shall be taken.
(g) When grouted fixtures can be tested by applying torque, the first fixture
installed in each work place shall be
tested to withstand 150 foot-pounds of
torque. Should it rotate in the hole, a
second fixture shall be tested in the
same manner. If the second fixture also
turns, corrective action shall be taken.
(h) When other tensioned and nontensioned fixtures are used, test methods
shall be established to verify their effectiveness.
(i) The mine operator shall certify
that tests were conducted and make
the certification available to an authorized representative of the Secretary.
[51 FR 36197, Oct. 8, 1986, as amended at 51 FR
36804, Oct. 16, 1986; 63 FR 20030, Apr. 22, 1998]
PRECAUTIONS
§ 56.3400
Secondary breakage.
Prior to secondary breakage operations, material to be broken, other
than hanging material, shall be positioned or blocked to prevent movement
which would endanger persons in the
work area. Secondary breakage shall
be performed from a location which
would not expose persons to danger.
§ 56.3401 Examination of ground conditions.
Persons experienced in examining
and testing for loose ground shall be
designated by the mine operator. Appropriate supervisors or other designated persons shall examine and,
where applicable, test ground conditions in areas where work is to be performed prior to work commencing,
after blasting, and as ground conditions warrant during the work shift.
Highwalls
and
banks
adjoining
travelways shall be examined weekly
or more often if changing ground conditions warrant.
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§ 56.3430
30 CFR Ch. I (7–1–19 Edition)
§ 56.3430 Activity between machinery
or equipment and the highwall or
bank.
Persons shall not work or travel between machinery or equipment and the
highwall or bank where the machinery
or equipment may hinder escape from
falls or slides of the highwall or bank.
Travel is permitted when necessary for
persons to dismount.
Subpart C—Fire Prevention and
Control
AUTHORITY: Sec. 101, Federal Mine Safety
and Health Act of 1977, Pub. L. 91–173, as
amended by Pub. L. 95–164, 91 Stat. 1291 (30
U.S.C. 811).
§ 56.4000
Definitions.
The following definitions apply in
this subpart.
Flash point. The minimum temperature at which sufficient vapor is released by a liquid to form a flammable
vapor-air mixture near the surface of
the liquid.
Safety can. A container of not over
five gallons capacity that is designed
to safely relieve internal pressure when
exposed to heat and has a spring-closing lid and spout cover.
[50 FR 4054, Jan. 29, 1985, as amended at 68
FR 32361, May 30, 2003; 69 FR 38840, June 29,
2004]
§ 56.4011
Abandoned electric circuits.
Abandoned electric circuits shall be
deenergized and isolated so that they
cannot become energized inadvertently.
PROHIBITIONS/PRECAUTIONS/
HOUSEKEEPING
§ 56.4100 Smoking and use of open
flames.
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No person shall smoke or use an open
flame where flammable or combustible
liquids, including greases, or flammable gases are—
(a) Used or transported in a manner
that could create a fire hazard; or
(b) Stored or handled.
§ 56.4101
Warning signs.
Readily visible signs prohibiting
smoking and open flames shall be post-
ed where a fire or explosion hazard exists.
§ 56.4102 Spillage and leakage.
Flammable or combustible liquid
spillage or leakage shall be removed in
a timely manner or controlled to prevent a fire hazard.
§ 56.4103 Fueling internal combustion
engines.
Internal combustion engines shall be
switched off before refueling if the fuel
tanks are integral parts of the equipment. This standard does not apply to
diesel-powered equipment.
§ 56.4104 Combustible waste.
(a) Waste materials, including liquids, shall not accumulate in quantities that could create a fire hazard.
(b) Until disposed of properly, waste
or rags containing flammable or combustible liquids that could create a fire
hazard shall be placed in covered metal
containers or other equivalent containers with flame containment characteristics.
§ 56.4130 Electric substations and liquid storage facilities.
(a) If a hazard to persons could be
created, no combustible materials shall
be stored or allowed to accumulate
within 25 feet of the following:
(1) Electric substations.
(2) Unburied, flammable or combustible liquid storage tanks.
(3) Any group of containers used for
storage of more than 60 gallons of flammable or combustible liquids.
(b) The area within the 25-foot perimeter shall be kept free of dry vegetation.
FIREFIGHTING EQUIPMENT
§ 56.4200 General requirements.
(a) For fighting fires that could endanger persons, each mine shall have—
(1) Onsite firefighting equipment for
fighting fires in their early stages; and
(2) Onsite firefighting equipment for
fighting fires beyond their early stages,
or the mine shall have made prior arrangements with a local fire department to fight such fires.
(b) This onsite firefighting equipment shall be—
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Mine Safety and Health Admin., Labor
§ 56.4230
(1) Of the type, size, and quantity
that can extinguish fires of any class
which could occur as a result of the
hazards present; and
(2) Strategically located, readily accessible, plainly marked, and maintained in fire-ready condition.
hydrostatic testing shall be retained
until the fire extinguisher is retested
or permanently removed from service.
Other certifications shall be retained
for one year.
TABLE C–1—HYDROSTATIC TEST INTERVALS
FOR FIRE EXTINGUISHERS
[50 FR 4054, Jan. 29, 1985, as amended at 50
FR 20100, May 14, 1985]
Test interval
(years)
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Extinguisher type
§ 56.4201 Inspection.
(a) Firefighting equipment shall be
inspected according to the following
schedules:
(1) Fire extinguishers shall be inspected visually at least once a month
to determine that they are fully
charged and operable.
(2) At least once every twelve
months, maintenance checks shall be
made of mechanical parts, the amount
and condition of extinguishing agent
and expellant, and the condition of the
hose, nozzle, and vessel to determine
that the fire extinguishers will operate
effectively.
(3) Fire extinguishers shall be
hydrostatically tested according to
Table C–1 or a schedule based on the
manufacturer’s specifications to determine the integrity of extinguishing
agent vessels.
(4) Water pipes, valves, outlets, hydrants, and hoses that are part of the
mine’s firefighting system shall be visually inspected at least once every
three months for damage or deterioration and use-tested at least once every
twelve months to determine that they
remain functional.
(5) Fire suppression systems shall be
inspected at least once every twelve
months. An inspection schedule based
on the manufacturer’s specifications or
the equivalent shall be established for
individual components of a system and
followed to determine that the system
remains functional. Surface fire suppression systems are exempt from
these inspection requirements if the
systems are used solely for the protection of property and no persons would
be affected by a fire.
(b) At the completion of each inspection or test required by this standard,
the person making the inspection or
test shall certify that the inspection or
test has been made and the date on
which it was made. Certifications of
Soda Acid ..............................................................
Cartridge-Operated Water and/or Antifreeze ........
Stored-Pressure Water and/or Antifreeze .............
Wetting Agent ........................................................
Foam ......................................................................
AFFF (Aqueous Film Forming Foam) ...................
Loaded Stream ......................................................
Dry-Chemical with Stainless Steel Shells .............
Carbon Dioxide ......................................................
Dry-Chemical, Stored Pressure, with Mild Steel
Shells, Brazed Brass Shells, or Aluminum
Shells .................................................................
Dry-Chemical, Cartridge or Cylinder Operated,
with Mild Steel Shells .........................................
Bromotrifluoromethane—Halon 1301 ....................
Bromochlorodifluoromethane—Halon 1211 ..........
Dry-Powder, Cartridge or Cylinder-Operated, with
Mild Steel Shells 1 ..............................................
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12
12
12
1 Except
for stainless steel and steel used for compressed
gas cylinders, all other steel shells are defined as ‘‘mild steel’’
shells.
§ 56.4202
Fire hydrants.
If fire hydrants are part of the mine’s
firefighting system, the hydrants shall
be provided with—
(a) Uniform fittings or readily available adapters for onsite firefighting
equipment;
(b) Readily available wrenches or
keys to open the valves; and
(c) Readily available adapters capable of connecting hydrant fittings to
the hose equipment of any firefighting
organization relied upon by the mine.
§ 56.4203 Extinguisher recharging or
replacement.
Fire extinguishers shall be recharged
or replaced with a fully charged extinguisher promptly after any discharge.
§ 56.4230
Self-propelled equipment.
(a)(1) Whenever a fire or its effects
could impede escape from self-propelled
equipment, a fire extinguisher shall be
on the equipment.
(2) Whenever a fire or its effects
would not impede escape from the
equipment but could affect the escape
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§ 56.4330
30 CFR Ch. I (7–1–19 Edition)
of other persons in the area, a fire extinguisher shall be on the equipment or
within 100 feet of the equipment.
(b) A fire suppression system may be
used as an alternative to fire extinguishers if the system can be manually
activated.
(c) Fire extinguishers or fire suppression systems shall be of a type and size
that can extinguish fires of any class in
their early stages which could originate from the equipment’s inherent
fire hazards. Fire extinguishers or
manual actuators for the suppression
system shall be located to permit their
use by persons whose escape could be
impeded by fire.
FIREFIGHTING PROCEDURES/ALARMS/
DRILLS
§ 56.4330 Firefighting, evacuation, and
rescue procedures.
(a) Mine operators shall establish
emergency firefighting, evacuation,
and rescue procedures. These procedures shall be coordinated in advance
with available firefighting organizations.
(b) Fire alarm procedures or systems
shall be established to pomptly warn
every person who could be endangered
by a fire.
(c) Fire alarm systems shall be maintained in operable condition.
§ 56.4331 Firefighting drills.
Emergency firefighting drills shall be
held at least once every six months for
persons assigned firefighting responsibilities by the mine operator.
FLAMMABLE AND COMBUSTIBLE LIQUIDS
AND GASES
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§ 56.4400 Use restrictions.
(a) Flammable liquids shall not be
used for cleaning.
(b) Solvents shall not be used near an
open flame or other ignition source,
near any source of heat, or in an atmosphere that can elevate the temperature of the solvent above the flash
point.
§ 56.4401
Fixed,
bustible
securely
Storage tank foundations.
unburied, flammable or comliquid storage tanks shall be
mounted on firm foundations.
Piping shall be provided with flexible
connections or other special fittings
where necessary to prevent leaks
caused by tanks settling.
§ 56.4402
Safety can use.
Small quantities of flammable liquids drawn from storage shall be kept
in safety cans labeled to indicate the
contents.
§ 56.4430
Storage facilities.
(a) Storage tanks for flammable or
combustible liquids shall be—
(1) Capable of withstanding working
pressures and stresses and compatible
with the type of liquid stored;
(2) Maintained in a manner that prevents leakage;
(3) Isolated or separated from ignition sources to prevent fire or explosion; and
(4) Vented or otherwise constructed
to prevent development of pressure or
vacuum as a result of filling, emptying,
or atmospheric temperature changes.
Vents for storage of Class I, II, or IIIA
liquids shall be isolated or separated
from ignition sources. These pressure
relief requirements do not apply to
tanks used for storage of Class IIIB liquids that are larger than 12,000 gallons
in capacity.
(b) All piping, valves, and fittings
shall be—
(1) Capable of withstanding working
pressures and stresses;
(2) Compatible with the type of liquid
stored; and
(3) Maintained in a manner that prevents leakage.
(c) Fixed, unburied tanks located
where escaping liquid could present a
hazard to persons shall be provided
with—
(1) Containment for the entire capacity of the largest tank; or
(2) Drainage of a remote impoundment area that does not endanger persons. However, storage of only Class
IIIB liquids does not require containment or drainage to remote impoundment.
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Mine Safety and Health Admin., Labor
INSTALLATION/CONSTRUCTION/
MAINTENANCE
§ 56.4500
Heat sources.
Heat sources capable of producing
combustion shall be separated from
combustible materials if a fire hazard
could be created.
§ 56.4501
Fuel lines.
Fuel lines shall be equipped with
valves capable of stopping the flow of
fuel at the source and shall be located
and maintained to minimize fire hazards. This standard does not apply to
fuel lines on self-propelled equipment.
§ 56.4502
WELDING/CUTTING/COMPRESSED GASES
Conveyor belt slippage.
Belt conveyors within confined areas
where evacuation would be restricted
in the event of a fire resulting from
belt-slippage shall be equipped with a
detection system capable of automatically stopping the drive pulley. A person shall attend the belt at the drive
pulley when it is necessary to operate
the conveyor while temporarily bypassing the automatic function.
§ 56.4530
Exits.
Buildings or structures in which persons work shall have a sufficient number of exits to permit prompt escape in
case of fire.
§ 56.4531 Flammable or combustible
liquid storage buildings or rooms.
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to prevent the accumulation of flammable vapors.
(b) In addition, the buildings or
rooms shall be—
(1) Constructed to meet a fire resistance rating of at least one hour; or
(2) Equipped with an automatic fire
suppression system; or
(3) Equipped with an early warning
fire detection device that will alert any
person who could be endangered by a
fire, provided that no person’s work
station is in the building.
(c) Flammable or combustible liquids
in use for day-to-day maintenance and
operational activities are not considered in storage under this standard.
Battery-charging stations.
(a) Battery-charging stations shall be
ventilated with a sufficient volume of
air to prevent the accumulation of hydrogen gas.
(b) Smoking, use of open flames, or
other activities that could create an ignition source shall be prohibited at the
battery charging station during battery charging.
(c) Readily visible signs prohibiting
smoking or open flames shall be posted
at battery-charging stations during
battery charging.
§ 56.4503
§ 56.4602
(a) Storage buildings or storage
rooms in which flammable or combustible liquids, including grease, are
stored and that are within 100 feet of
any person’s work station shall be ventilated with a sufficient volume of air
§ 56.4600 Extinguishing equipment.
(a) When welding, cutting, soldering,
thawing, or bending—
(1) With an electric arc or with an
open flame where an electrically conductive extinguishing agent could create an electrical hazard, a multipurpose dry-chemical fire extinguisher or
other extinguisher with at least a 2–
A:10–B:C rating shall be at the worksite.
(2) With an open flame in an area
where no electrical hazard exists, a
multipurpose dry-chemical fire extinguisher or equivalent fire extinguishing equipment for the class of fire
hazard present shall be at the worksite.
(b) Use of halogenated fire extinguishing agents to meet the requirements of this standard shall be limited
to Halon 1211 (CBrClF2) and Halon 1301
(CBrF3). When these agents are used in
confined or unventilated areas, precautions based on the manufacturer’s
use instructions shall be taken so that
the
gases
produced
by
thermal
decompostion of the agents are not inhaled.
§ 56.4601 Oxygen cylinder storage.
Oxygen cylinders shall not be stored
in rooms or areas used or designated
for storage of flammable or combustible liquids, including grease.
§ 56.4602 Gauges and regulators.
Gauges and regulators used with oxygen or acetylene cylinders shall be
kept clean and free of oil and grease.
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§ 56.4603
30 CFR Ch. I (7–1–19 Edition)
§ 56.4603 Closure of valves.
To prevent accidental release of
gases from hoses and torches attached
to oxygen and acetylene cylinders or to
manifold systems, cylinder or manifold
system valves shall be closed when—
(a) The cylinders are moved;
(b) The torch and hoses are left unattended; or
(c) The task or series of tasks is completed.
§ 56.4604 Preparation of pipelines or
containers.
Before welding, cutting, or applying
heat with an open flame to pipelines or
containers that have contained flammable or combustible liquids, flammable gases, or explosive solids, the
pipelines or containers shall be—
(a) Drained, ventilated, and thoroughly cleaned of any residue;
(b) Vented to prevent pressure buildup during the application of heat; and
(c)(1) Filled with an inert gas or
water, where compatible; or
(2) Determined to be free of flammable gases by a flammable gas detection device prior to and at frequent intervals during the application of heat.
APPENDIX I TO SUBPART C OF PART 56—
NATIONAL CONSENSUS STANDARDS
Mine operators seeking further information in the area of fire prevention and control may consult the following national consensus standards.
MSHA
standard
National consensus standard
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§§ 56.4200,
56.4201.
NFPA No. 10—Portable Fire Extinguisher.
§ 56.4202 ..
NFPA No. 11—Low Expansion Foam and Combined Agent Systems.
NFPA No. 11A—High Expansion Foam Systems.
NFPA No. 12—Carbon Dioxide Extinguishing
Systems.
NFPA No. 12A—Halon 1301 Extinguishing Systems.
NFPA No. 13—Water Sprinkler Systems.
NFPA No. 14—Standpipe and Hose Systems.
NFPA No. 15—Water Spray Fixed Systems.
NFPA No. 16—Foam Water Spray Systems.
NFPA No. 17—Dry-Chemical Extinguishing
Systems.
NFPA No. 121—Mobile Surface Mining Equipment.
NFPA No. 291—Testing and Marketing Hydrants.
NFPA No. 1962—Care, Use, and Maintenance
of Fire Hose, Connections, and Nozzles.
NFPA No. 14—Standpipe and Hose Systems.
NFPA No. 291—Testing and Marketing Hydrants.
MSHA
standard
National consensus standard
§ 56.4203 ..
§ 56.4230 ..
NFPA No. 10—Portable Fire Extinguishers.
NFPA No. 10—Portable Fire Extinguishers.
NFPA No. 121—Mobile Surface Mining Equipment.
Subpart D—Air Quality and
Physical Agents
AIR QUALITY
§ 56.5001 Exposure limits for airborne
contaminants.
Except as permitted by § 56.5005—
(a) Except as provided in paragraph
(b) of this section, the exposure to airborne contaminants shall not exceed,
on the basis of a time weighted average, the threshold limit values adopted
by the American Conference of Governmental Industrial Hygienists, as set
forth and explained in the 1973 edition
of the Conference’s publication, entitled ‘‘TLV’s Threshold Limit Values
for Chemical Substances in Workroom
Air Adopted by ACGIH for 1973,’’ pages
1 through 54, which are hereby incorporated by reference and made a part
hereof. This publication may be obtained from the American Conference
of Governmental industrial Hygienists
by writing to 1330 Kemper Meadow
Drive, Attn: Customer Service, Cincinnati, OH 45240; http://www.acgih.org’’,
or may be examined in any Metal and
Nonmetal Mine Safety and Health District Office of the Mine Safety and
Health
Administration.
Excursions
above the listed thresholds shall not be
of a greater magnitude than is characterized as permissible by the Conference.
(b) Asbestos standard—(1) Definitions.
Asbestos is a generic term for a number of asbestiform hydrated silicates
that, when crushed or processed, separate into flexible fibers made up of
fibrils.
Asbestos
means
chrysotile,
cummingtonite-grunerite
asbestos
(amosite), crocidolite, anthophylite asbestos, tremolite asbestos, and actinolite asbestos.
Asbestos fiber means a fiber of asbestos that meets the criteria of a fiber.
Fiber means a particle longer than 5
micrometers (μm) with a length-to-diameter ratio of at least 3-to-1.
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Mine Safety and Health Admin., Labor
§ 56.5006
(2)
Permissible
Exposure
Limits
(PELs)—(i) Full-shift limit. A miner’s
personal exposure to asbestos shall not
exceed an 8-hour time-weighted average full-shift airborne concentration of
0.1 fiber per cubic centimeter of air (f/
cc).
(ii) Excursion limit. No miner shall be
exposed at any time to airborne concentrations of asbestos in excess of 1
fiber per cubic centimeter of air (f/cc)
as averaged over a sampling period of
30 minutes.
(3) Measurement of airborne asbestos
fiber concentration. Potential asbestos
fiber concentration shall be determined
by phase contrast microscopy (PCM)
using the OSHA Reference Method in
OSHA’s asbestos standard found in 29
CFR 1910.1001, Appendix A, or a method
at least equivalent to that method in
identifying a potential asbestos exposure exceeding the 0.1 f/cc full-shift
limit or the 1 f/cc excursion limit.
When PCM results indicate a potential
exposure exceeding the 0.1 f/cc fullshift limit or the 1 f/cc excursion limit,
samples shall be further analyzed using
transmission electron microscopy according to NIOSH Method 7402 or a
method at least equivalent to that
method.
(c) Employees shall be withdrawn
from areas where there is present an
airborne contaminant given a ‘‘C’’ designation by the Conference and the
concentration exceeds the threshold
limit value listed for that contaminant.
have not been developed or when necessary by the nature of work involved
(for example, while establishing controls or occasional entry into hazardous atmospheres to perform maintenance or investigation), employees
may work for reasonable periods of
time in concentrations of airborne contaminants exceeding permissible levels
if they are protected by appropriate
respiratory
protective
equipment.
Whenever respiratory protective equipment is used a program for selection,
maintenance, training, fitting, supervision, cleaning, and use shall meet the
following miminum requirements:
(a) Respirators approved by NIOSH
under 42 CFR part 84 which are applicable and suitable for the purpose intended shall be furnished and miners
shall use the protective equipment in
accordance with training and instruction.
(b) A respirator program consistent
with the requirements of ANSI Z88.2–
1969, published by the American National Standards Institute and entitled
‘‘American National Standards Practices for Respiratory Protection ANSI
Z88.2–1969,’’ approved August 11, 1969,
which is hereby incorporated by reference and made a part hereof. This
publication may be obtained from the
American National Standards Institute, Inc., 25 W. 43rd Street, 4th Floor,
New
York,
NY
10036;
http://
www.ansi.org’’, or may be examined in
any Metal and Nonmetal Mine Safety
and Health District Office of the Mine
Safety and Health Administration.
(c) When respiratory protection is
used in atmospheres immediately
harmful to life, the presence of at least
one other person with backup equipment and rescue capability shall be required in the event of failure of the respiratory equipment.
[50 FR 4054, Jan. 29, 1985, as amended at 60
FR 35695, July 11, 1995; 71 FR 16667, Apr. 3,
2006; 73 FR 11303, Feb. 29, 2008; 73 FR 66172,
Nov. 7, 2008]
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§ 56.5002 Exposure monitoring.
Dust, gas, mist, and fume surveys
shall be conducted as frequently as
necessary to determine the adequacy of
control measures.
§ 56.5005 Control of exposure to airborne contaminants.
Control of employee exposure to
harmful airborne contaminants shall
be, insofar as feasible, by prevention of
contamination, removal by exhaust
ventilation, or by dilution with
uncontaminated air. However, where
accepted, engineering control measures
[50 FR 4054, Jan. 29, 1985, as amended at 60
FR 30400, June 8, 1995; 60 FR 33723, June 29,
1995; 60 FR 35695, July 11, 1995; 71 FR 16667,
Apr. 3, 2006]
§ 56.5006 Restricted use of chemicals.
The following chemical substances
shall not be used or stored except by
competent persons under laboratory
conditions approved by a nationally
recognized agency acceptable to the
Secretary.
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§ 56.6000
30 CFR Ch. I (7–1–19 Edition)
(a) Carbon tetrachloride.
(b) Phenol,
(c) 4-Nitrobiphenyl,
(d) Alpha-naphthylamine,
(e)
4,4-Methylene
Bis
chloroaniline),
(f) Methyl-chloromethyl ether,
(g) 3,3 Dichlorobenzidine,
(h) Bis (chloromethyl) ether,
(i) Beta-napthylamine,
(j) Benzidine,
(k) 4-Aminodiphenyl,
(l) Ethyleneimine,
(m) Beta-propiolactone,
(n) 2-Acetylaminofluorene,
(o) 4-Dimethylaminobenzene, and
(p) N-Nitrosodimethylamine.
(2-
Subpart E—Explosives
SOURCE: 61 FR 36795, July 12, 1996, unless
otherwise noted.
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§ 56.6000
Definitions.
The following definitions apply in
this subpart.
Blasting agent. Any substance classified as a blasting agent by the Department of Transportation in 49 CFR
173.114a(a). This document is available
at any MSHA Metal and Nonmetal
Safety and Health district office.
Detonating cord. A flexible cord containing a center core of high explosives
which may be used to initiate other explosives.
Detonator. Any device containing a
detonating charge used to initiate an
explosive. These devices include electric or nonelectric instantaneous or
delay blasting caps and delay connectors. The term ‘‘detonator’’ does not
include detonating cord. Detonators
may be either ‘‘Class A’’ detonators or
‘‘Class C’’ detonators, as classified by
the Department of Transportation in 49
CFR 173.53, and 173.100. This document
is available at any MSHA Metal and
Nonmetal Safety and Health district
office.
Flash point. The minimum temperature at which sufficient vapor is released by a liquid to form a flammable
vapor-air mixture near the surface of
the liquid.
Igniter cord. A fuse that burns progressively along its length with an external flame at the zone of burning,
used for lighting a series of safety fuses
in a desired sequence.
Magazine. A bullet-resistant, theftresistant, fire-resistant, weather-resistant, ventilated facility for the storage of explosives and detonators (BATF
Type 1 or Type 2 facility).
Misfire. The complete or partial failure of explosive material to detonate
as planned. The term also is used to describe the explosive material itself
that has failed to detonate.
Primer. A unit, package, or cartridge
of explosives which contains a detonator and is used to initiate other explosives or blasting agents.
Safety switch. A switch that provides
shunt protection in blasting circuits
between the blast site and the switch
used to connect a power source to the
blasting circuit.
Slurry. An explosive material containing substantial portions of a liquid,
oxidizers, and fuel, plus a thickener.
Water gel. An explosive material containing substantial portions of water,
oxidizers, and fuel, plus a cross-linking
agent.
[50 FR 4054, Jan. 29, 1985, as amended at 67
FR 38385, June 4, 2002; 68 FR 32361, May 30,
2003; 69 FR 38840, June 29, 2004]
STORAGE
§ 56.6100 Separation of stored explosive material.
(a) Detonators shall not be stored in
the same magazine with other explosive material.
(b) When stored in the same magazine, blasting agents shall be separated
from explosives, safety fuse, and detonating cord to prevent contamination.
§ 56.6101 Areas around explosive material storage facilities.
(a) Areas surrounding storage facilities for explosive material shall be
clear of rubbish, brush, dry grass, and
trees for 25 feet in all directions, except
that live trees 10 feet or taller need not
be removed.
(b) Other combustibles shall not be
stored or allowed to accumulate within
50 feet of explosive material. Combustible liquids shall be stored in a manner that ensures drainage will occur
away from the explosive material storage facility in case of tank rupture.
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Mine Safety and Health Admin., Labor
§ 56.6132
§ 56.6102 Explosive material storage
practices.
(a) Explosive material shall be—
(1) Stored in a manner to facilitate
use of oldest stocks first;
(2) Stored according to brand and
grade in such a manner as to facilitate
identification; and
(3) Stacked in a stable manner but
not more than 8 feet high.
(b) Explosives and detonators shall be
stored in closed nonconductive containers except that nonelectric detonating devices may be stored on nonconductive racks provided the case-insert instructions and the date-plantshift code are maintained with the
product.
powerlines, if damaged, would not contact the magazines.
(b) Operators should also be aware of
regulations affecting storage facilities
in 27 CFR part 55, in particular, 27 CFR
55.218 and 55.220. This document is
available at any MSHA Metal and
Nonmetal Safety and Health district
office.
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§ 56.6130 Explosive material storage
facilities.
(a) Detonators and explosives shall be
stored in magazines.
(b) Packaged blasting agents shall be
stored in a magazine or other facility
which is ventilated to prevent dampness and excessive heating, weather-resistant, and locked or attended. Drop
trailers do not have to be ventilated if
they are currently licensed by the Federal, State, or local authorities for
over-the-road use. Facilities other than
magazines used to store blasting
agents shall contain only blasting
agents.
(c) Bulk blasting agents shall be
stored in weather-resistant bins or
tanks which are locked, attended, or
otherwise inaccessible to unauthorized
entry.
(d) Facilities, bins or tanks shall be
posted with the appropriate United
States Department of Transportation
placards or other appropriate warning
signs that indicate the contents and
are visible from each approach.
§ 56.6131 Location of explosive material storage facilities.
(a) Storage facilities for any explosive material shall be—
(1) Located so that the forces generated by a storage facility explosion
will not create a hazard to occupants
in mine buildings and will not damage
dams or electric substations; and
(2) Detached structures located outside the blast area and a sufficient distance from powerlines so that the
§ 56.6132
Magazine requirements.
(a) Magazines shall be—
(1) Structurally sound;
(2) Noncombustible or the exterior
covered with fire-resistant material;
(3) Bullet resistant;
(4) Made of nonsparking material on
the inside;
(5) Ventilated to control dampness
and excessive heating within the magazine;
(6) Posted with the appropriate
United States Department of Transportation placards or other appropriate
warning signs that indicate the contents and are visible from each approach, so located that a bullet passing
through any of the signs will not strike
the magazine;
(7) Kept clean and dry inside;
(8) Unlighted or lighted by devices
that are specifically designed for use in
magazines and which do not create a
fire or explosion hazard;
(9) Unheated or heated only with devices that do not create a fire or explosion hazard;
(10) Locked when unattended; and
(11) Used exclusively for the storage
of explosive material except for essential nonsparking equipment used for
the operation of the magazine.
(b)
Metal
magazines
shall
be
equipped with electrical bonding connections between all conductive portions so the entire structure is at the
same electrical potential. Suitable
electrical bonding methods include
welding, riveting, or the use of securely
tightened bolts where individual metal
portions are joined. Conductive portions of nonmetal magazines shall be
grounded.
(c) Electrical switches and outlets
shall be located on the outside of the
magazine.
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§ 56.6133
§ 56.6133
30 CFR Ch. I (7–1–19 Edition)
TRANSPORTATION
Powder chests.
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(a) Powder chests (day boxes) shall
be—
(1) Structurally sound, weather-resistant, equipped with a lid or cover,
and with only nonsparking material on
the inside;
(2) Posted with the appropriate
United States Department of Transportation placards or other appropriate
warning signs that indicate the contents and are visible from each approach;
(3) Located out of the blast area once
loading has been completed;
(4) Locked or attended when containing explosive material; and
(5) Emptied at the end of each shift
with the contents returned to a magazine or other storage facility, or attended.
(b) Detonators shall be kept in chests
separate from explosives or blasting
agents, unless separated by 4 inches of
hardwood or equivalent, or a laminated
partition. When a laminated partition
is used, operators must follow the provisions of the Institute of Makers of
Explosives (IME) Safety Library Publication No. 22, ‘‘Recommendations for
the Safe Transportation of Detonators
in a Vehicle with Other Explosive Materials’’ (May 1993), and the ‘‘Generic
Loading Guide for the IME–22 Container’’ (October 1993). The IME is located at 1120 19th Street NW., Suite 310,
Washington, DC 20036–3605; 202–429–9280;
https://www.ime.org. This incorporation
by reference has been approved by the
Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR
part 51. Copies are available at MSHA’s
Office of Standards, Regulations, and
Variances, 201 12th Street South, Arlington, VA 22202–5452; 202–693–9440; and
at all Metal and Nonmetal Mine Safety
and Health District Offices, or available for inspection at the National Archives and Records Administration
(NARA). For information on the availability of this material at NARA, call
202–741–6030,
or
go
to:
http://
www.archives.gov/federallregister/
codeloflfederallregulations/
ibrllocations.html.
[50 FR 4054, Jan. 29, 1985, as amended at 67
FR 38385, June 4, 2002; 80 FR 52987, Sept. 2,
2015]
§ 56.6200 Delivery to storage or blast
site areas.
Explosive material shall be transported without undue delay to the storage area or blast site.
§ 56.6201 Separation of transported explosive material.
Detonators shall not be transported
on the same vehicle or conveyance
with other explosives except as follows:
(a) Detonators in quantities of more
than 1000 may be transported in a vehicle or conveyance with explosives or
blasting agents provided the detonators are—
(1) Maintained in the original packaging as shipped from the manufacturer; and
(2) Separated from explosives or
blasting agents by 4 inches of hardwood
or equivalent, or a laminated partition.
The hardwood or equivalent shall be
fastened to the vehicle or conveyance.
When a laminated partition is used, operators must follow the provisions of
the Institute of Makers of Explosives
(IME) Safety Library Publication
No.22, ‘‘Recommendations for the Safe
Transportation of Detonators in a Vehicle with Other Explosive Materials’’
(May 1993), and the ‘‘Generic Loading
Guide for the IME–22 Container’’ (October 1993). The IME is located at 1120
19th Street NW., Suite 310, Washington,
DC 20036–3605; 202–429–9280; https://
www.ime.org. This incorporation by reference has been approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR
part 51. Copies are available at MSHA’s
Office of Standards, Regulations, and
Variances, 201 12th Street South, Arlington, VA 22202–5452; 202–693–9440; and
at all Metal and Nonmetal Mine Safety
and Health District Offices, or available for inspection at the National Archives and Records Administration
(NARA). For information on the availability of this material at NARA, call
202–741–6030,
or
go
to:
http://
www.archives.gov/federallregister/
codeloflfederallregulations/
ibrllocations.html.
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Mine Safety and Health Admin., Labor
§ 56.6204
(b) Detonators in quantities of 1000 or
fewer may be transported with explosives or blasting agents provided the
detonators are—
(1) Kept in closed containers; and
(2) Separated from explosives or
blasting agents by 4 inches of hardwood
or equivalent, or a laminated partition.
The hardwood or equivalent shall be
fastened to the vehicle or conveyance.
When a laminated partition is used, operators must follow the provisions of
IME Safety Library Publication No. 22,
‘‘Recommendations for the Safe Transportation of Detonators in a Vehicle
with Other Explosive Materials’’ (May
1993), and the ‘‘Generic Loading Guide
for the IME–22 Container’’ (October
1993). The IME is located at 1120 19th
Street NW., Suite 310, Washington, DC
20036–3605;
202–429–9280;
https://
www.ime.org. This incorporation by reference has been approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR
part 51. Copies are available at MSHA’s
Office of Standards, Regulations, and
Variances, 201 12th Street South, Arlington, VA 22202–5452; 202–693–9440; and
at all Metal and Nonmetal Mine Safety
and Health District Offices, or available for inspection at the National Archives and Records Administration
(NARA). For information on the availability of this material at NARA, call
202–741–6030,
or
go
to:
http://
www.archives.gov/federallregister/
codeloflfederallregulations/
ibrllocations.html.
(4) Equipped with at least two multipurpose
dry-chemical
fire
extinguishers or one such extinguisher and
an automatic fire suppression system;
(5) Posted with warning signs that indicate the contents and are visible
from each approach;
(6) Occupied only by persons necessary for handling the explosive material;
(7) Attended or the cargo compartment locked, except when parked at
the blast site and loading is in
progress; and
(8) Secured while parked by having—
(i) The brakes set;
(ii) The wheels chocked if movement
could occur; and
(iii) The engine shut off unless
powering a device being used in the
loading operation.
(b) Vehicles containing explosives
shall have—
(1) No sparking material exposed in
the cargo space; and
(2) Only properly secured nonsparking equipment in the cargo space
with the explosives.
(c) Vehicles used for dispensing bulk
explosive material shall—
(1) Have no zinc or copper exposed in
the cargo space; and
(2) Provide any enclosed screw-type
conveyors with protection against internal pressure and frictional heat.
[50 FR 4054, Jan. 29, 1985, as amended at 67
FR 38385, June 4, 2002; 80 FR 52987, Sept. 2,
2015]
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§ 56.6202
Vehicles.
(a) Vehicles containing explosive material shall be—
(1) Maintained in good condition and
shall comply with the requirements of
subpart M of this part;
(2) Equipped with sides and enclosures higher than the explosive material being transported or have the explosive material secured to a nonconductive pallet;
(3) Equipped with a cargo space that
shall contain the explosive material
(passenger areas shall not be considered cargo space);
§ 56.6203 Locomotives.
Explosive material shall not be
transported on a locomotive. When explosive material is hauled by trolley
locomotive, covered, electrically insulated cars shall be used.
§ 56.6204 Hoists.
(a) Before explosive material is
transported in hoist conveyances, the
hoist operator shall be notified.
(b) Explosive material transported in
hoist conveyances shall be placed within a container which prevents shifting
of the cargo that could cause detonation of the container by impact or by
sparks. The manufacturer’s container
may be used if secured to a nonconductive pallet. When explosives are transported, they shall be secured so as not
to contact any sparking material.
(c) No explosive material shall be
transported during a mantrip.
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§ 56.6205
30 CFR Ch. I (7–1–19 Edition)
§ 56.6205 Conveying
explosives
by
hand.
Closed, nonconductive containers
shall be used to carry explosives and
detonators to and from blast sites. Separate containers shall be used for explosives and detonators.
USE
§ 56.6300 Control of blasting operations.
(a) Only persons trained and experienced in the handling and use of explosive material shall direct blasting operations and related activities.
(b) Trainees and inexperienced persons shall work only in the immediate
presence of persons trained and experienced in the handling and use of explosive material.
§ 56.6301 Blasthole obstruction check.
Before loading, blastholes shall be
checked and, wherever possible, cleared
of obstructions.
§ 56.6302 Separation of explosive material.
Explosives and blasting agents shall
be kept separated from detonators
until loading begins.
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§ 56.6303 Initiation preparation.
(a) Primers shall be made up only at
the time of use and as close to the
blast site as conditions allow.
(b) Primers shall be prepared with
the detonator contained securely and
completely within the explosive or contained securely and appropriately for
its design in the tunnel or cap well.
(c) When using detonating cord to
initiate another explosive, a connection shall be prepared with the detonating cord threaded through, attached
securely to, or otherwise in contact
with the explosive.
§ 56.6304 Primer protection.
(a) Tamping shall not be done directly on a primer.
(b) Rigid cartridges of explosives or
blasting agents that are 4 inches (100
millimeters) in diameter or larger shall
not be dropped on the primer except
where the blasthole contains sufficient
depth of water to protect the primer
from impact. Slit packages of prill,
water gel, or emulsions are not considered rigid cartridges and may be drop
loaded.
§ 56.6305 Unused explosive material.
Unused explosive material shall be
moved to a protected location as soon
as practical after loading operations
are completed.
§ 56.6306 Loading, blasting, and security.
(a) When explosive materials or initiating systems are brought to the blast
site, the blast site shall be attended;
barricaded and posted with warning
signs, such as ‘‘Danger,’’ ‘‘Explosives,’’
or ‘‘Keep Out;’’ or flagged against unauthorized entry.
(b) Vehicles and equipment shall not
be driven over explosive material or
initiating systems in a manner which
could contact the material or systems,
or create other hazards.
(c) Once loading begins, the only activities permitted within the blast site
shall be those activities directly related to the blasting operation and the
activities of surveying, stemming,
sampling of geology, and reopening of
holes, provided that reasonable care is
exercised. Haulage activity is permitted near the base of a highwall
being loaded or awaiting firing, provided no other haulage access exists.
(d) Loading and blasting shall be conducted in a manner designed to facilitate a continuous process, with the
blast fired as soon as possible following
the completion of loading. If blasting a
loaded round may be delayed for more
than 72 hours, the operator shall notify
the appropriate MSHA district office.
(e) In electric blasting prior to connecting to the power source, and in
nonelectric blasting prior to attaching
an initiating device, all persons shall
leave the blast area except persons in a
blasting shelter or other location that
protects them from concussion (shock
wave), flying material, and gases.
(f) Before firing a blast—
(1) Ample warning shall be given to
allow all persons to be evacuated;
(2) Clear exit routes shall be provided
for persons firing the round; and
(3) All access routes to the blast area
shall be guarded or barricaded to prevent the passage of persons or vehicles.
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§ 56.6404
(g) Work shall not resume in the
blast area until a post-blast examination addressing potential blast-related
hazards has been conducted by a person
with the ability and experience to perform the examination.
ment not later than the end of the
shift.
§ 56.6307 Drill stem loading.
Explosive material shall not be loaded into blastholes with drill stem
equipment or other devices that could
be extracted while containing explosive
material. The use of loading hose, collar sleeves, or collar pipes is permitted.
§ 56.6308 Initiation systems.
Initiation systems shall be used in
accordance with the manufacturer’s instructions.
§ 56.6309 Fuel oil requirements for
ANFO.
(a) Liquid hydrocarbon fuels with
flash points lower than that of No. 2
diesel oil (125 °F) shall not be used to
prepare ammonium nitrate-fuel oil, except that diesel fuels with flash points
no lower than 100 °F may be used at
ambient air temperatures below 45 °F.
(b) Waste oil, including crankcase
oil, shall not be used to prepare ammonium nitrate-fuel oil.
kpayne on VMOFRWIN702 with $$_JOB
§ 56.6310 Misfire waiting period.
When a misfire is suspected, persons
shall not enter the blast area—
(a) For 30 minutes if safety fuse and
blasting caps are used; or
(b) For 15 minutes if any other type
detonators are used.
§ 56.6311 Handling of misfires.
(a) Faces and muck piles shall be examined for misfires after each blasting
operation.
(b) Only work necessary to remove a
misfire and protect the safety of miners engaged in the removal shall be
permitted in the affected area until the
misfire is disposed of in a safe manner.
(c) When a misfire cannot be disposed
of safely, each approach to the area affected by the misfire shall be posted
with a warning sign at a conspicuous
location to prohibit entry, and the condition shall be reported immediately to
mine management.
(d) Misfires occurring during the
shift shall be reported to mine manage-
§ 56.6312 Secondary blasting.
Secondary blasts fired at the same
time in the same work area shall be
initiated from one source.
ELECTRIC BLASTING
§ 56.6400 Compatibility of electric detonators.
All electric detonators to be fired in
a round shall be from the same manufacturer and shall have similar electrical firing characteristics.
§ 56.6401 Shunting.
Except during testing—
(a) Electric detonators shall be kept
shunted until connected to the blasting
line or wired into a blasting round;
(b) Wired rounds shall be kept shunted until connected to the blasting line;
and
(c) Blasting lines shall be kept shunted until immediately before blasting.
§ 56.6402 Deenergized circuits near
detonators.
Electrical distribution circuits within 50 feet of electric detonators at the
blast site shall be deenergized. Such
circuits need not be deenergized between 25 to 50 feet of the electric detonators if stray current tests, conducted
as frequently as necessary, indicate a
maximum stray current of less than
0.05 amperes through a 1-ohm resistor
as measured at the blast site.
§ 56.6403 Branch circuits.
(a) If electric blasting includes the
use of branch circuits, each branch
shall be equipped with a safety switch
or equivalent method to isolate the circuits to be used.
(b) At least one safety switch or
equivalent method of protection shall
be located outside the blast area and
shall be in the open position until persons are withdrawn.
§ 56.6404 Separation of blasting circuits from power source.
(a) Switches used to connect the
power source to a blasting circuit shall
be locked in the open position except
when closed to fire the blast.
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§ 56.6405
30 CFR Ch. I (7–1–19 Edition)
(b) Lead wires shall not be connected
to the blasting switch until the shot is
ready to be fired.
§ 56.6405 Firing devices.
(a) Power sources shall be capable of
delivering sufficient current to energize all electric detonators to be fired
with the type of circuits used. Storage
or dry cell batteries are not permitted
as power sources.
(b) Blasting machines shall be tested,
repaired, and maintained in accordance
with manufacturer’s instructions.
(c) Only the blaster shall have the
key or other control to an electrical
firing device.
§ 56.6406 Duration of current flow.
If any part of a blast is connected in
parallel and is to be initiated from
powerlines or lighting circuits, the
time of current flow shall be limited to
a maximum of 25 milliseconds. This
can be accomplished by incorporating
an arcing control device in the blasting
circuit or by interrupting the circuit
with an explosive device attached to
one or both lead lines and initiated by
a 25-millisecond delay electric detonator.
§ 56.6407 Circuit testing.
A blasting galvanometer or other instrument designed for testing blasting
circuits shall be used to test each of
the following:
(a) Continuity of each electric detonator in the blasthole prior to stemming and connection to the blasting
line.
(b) Resistance of individual series or
the resistance of multiple balanced series to be connected in parallel prior to
their connection to the blasting line.
(c) Continuity of blasting lines prior
to the connection of electric detonator
series.
(d) Total blasting circuit resistance
prior to connection to the power
source.
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NONELECTRIC BLASTING
§ 56.6500 Damaged initiating material.
A visual check of the completed circuit shall be made to ensure that the
components are properly aligned and
connected. Safety fuse, igniter cord,
detonating cord, shock or gas tubing,
and similar material which is kinked,
bent sharply, or damaged shall not be
used.
§ 56.6501 Nonelectric initiation systems.
(a) When the nonelectric initiation
system uses shock tube—
(1) Connections with other initiation
devices shall be secured in a manner
which provides for uninterrupted propagation;
(2) Factory-made units shall be used
as assembled and shall not be cut except that a single splice is permitted
on the lead-in trunkline during dry
conditions; and
(3) Connections between blastholes
shall not be made until immediately
prior to clearing the blast site when
surface delay detonators are used.
(b) When the nonelectric initiation
system uses detonating cord—
(1) The line of detonating cord extending out of a blasthole shall be cut
from the supply spool immediately
after the attached explosive is correctly positioned in the hole;
(2) In multiple row blasts, the trunkline layout shall be designed so that
the
detonation
can
reach
each
blasthole from at least two directions;
(3) Connections shall be tight and
kept at right angles to the trunkline;
(4) Detonators shall be attached securely to the side of the detonating
cord and pointed in the direction in
which detonation is to proceed;
(5) Connections between blastholes
shall not be made until immediately
prior to clearing the blast site when
surface delay detonators are used; and
(6) Lead-in lines shall be manually
unreeled if connected to the trunklines
at the blast site.
(c) When the nonelectric initiation
system uses gas tube, continuity of the
circuit shall be tested prior to blasting.
§ 56.6502 Safety fuse.
(a) The burning rate of each spool of
safety fuse to be used shall be measured, posted in locations which will be
conspicuous to safety fuse users, and
brought to the attention of all persons
involved with the blasting operation.
(b) When firing with safety fuse ignited individually using handheld
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Mine Safety and Health Admin., Labor
lighters, the safety fuse shall be of
lengths which provide at least the minimum burning time for a particular
size round, as specified in the following
table:
§ 56.6601
TABLE E–1—SAFETY FUSE—MINIMUM BURNING
TIME
§ 56.6602 Static electricity dissipation
during loading.
Minimum
burning time
Number of holes in a round
1 .........................................................
2–5 .....................................................
6–10 ...................................................
11 to 15 .............................................
2
2
3
5
min. 1
min. 40 sec.
min. 20 sec.
min.
1 For example, at least a 36-inch length of 40-second-perfoot safety fuse or at least a 48-inch length of 30-second-perfoot safety fuse would have to be used to allow sufficient time
to evacuate the area.
(c) Where flyrock might damage exposed safety fuse, the blast shall be
timed so that all safety fuses are burning within the blastholes before any
blasthole detonates.
(d) Fuse shall be cut and capped in
dry locations.
(e) Blasting caps shall be crimped to
fuse only with implements designed for
that purpose.
(f) Safety fuse shall be ignited only
after the primer and the explosive material are securely in place.
(g) Safety fuse shall be ignited only
with devices designed for that purpose.
Carbide lights, liquefied petroleum gas
torches, and cigarette lighters shall
not be used to light safety fuse.
(h) At least two persons shall be
present when lighting safety fuse, and
no one shall light more than 15 individual fuses. If more than 15 holes per
person are to be fired, electric initiation systems, igniter cord and connectors, or other nonelectric initiation
systems shall be used.
EXTRANEOUS ELECTRICITY
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§ 56.6605
§ 56.6600 Loading practices.
If extraneous electricity is suspected
in an area where electric detonators
are used, loading shall be suspended
until tests determine that stray current does not exceed 0.05 amperes
through a 1-ohm resister when measured at the location of the electric detonators. If greater levels of extraneous
electricity are found, the source shall
be determined and no loading shall
take place until the condition is corrected.
Grounding.
Electric blasting circuits, including
powerline sources when used, shall not
be grounded.
When explosive material is loaded
pneumatically into a blasthole in a
manner that generates a static electricity hazard—
(a) An evaluation of the potential
static electricity hazard shall be made
and any hazard shall be eliminated before loading begins;
(b) The loading hose shall be of a
semiconductive type, have a total of
not more than 2 megohms of resistance
over its entire length and not less than
1000 ohms of resistance per foot;
(c) Wire-countered hoses shall not be
used;
(d) Conductive parts of the loading
equipment shall be bonded and grounded and grounds shall not be made to
other potential sources of extraneous
electricity; and
(e) Plastic tubes shall not be used as
hole liners if the hole contains an electric detonator.
§ 56.6603
Air gap.
At least a 15-foot air gap shall be provided between the blasting circuit and
the electric power source.
§ 56.6604
Precautions during storms.
During the approach and progress of
an electrical storm, blasting operations
shall be suspended and persons withdrawn from the blast area or to a safe
location.
§ 56.6605
Isolation of blasting circuits.
Lead wires and blasting lines shall be
isolated and insulated from power conductors, pipelines, and railroad tracks,
and shall be protected from sources of
stray or static electricity. Blasting circuits shall be protected from any contact between firing lines and overhead
powerlines which could result from the
force of a blast.
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§ 56.6700
30 CFR Ch. I (7–1–19 Edition)
EQUIPMENT/TOOLS
§ 56.6901
§ 56.6700 Nonsparking tools.
Only nonsparking tools shall be used
to open containers of explosive material or to punch holes in explosive cartridges.
§ 56.6701 Tamping and loading pole requirements.
Tamping and loading poles shall be of
wood or other nonconductive, nonsparking material. Couplings for poles
shall be nonsparking.
MAINTENANCE
§ 56.6800 Storage facilities.
When repair work which could
produce a spark or flame is to be performed on a storage facility—
(a) The explosive material shall be
moved to another facility, or moved at
least 50 feet from the repair activity
and monitored; and
(b) The facility shall be cleaned to
prevent accidental detonation.
§ 56.6801 Vehicle repair.
Vehicles containing explosive material and oxidizers shall not be taken
into a repair garage or shop.
§ 56.6802 Bulk delivery vehicles.
No welding or cutting shall be performed on a bulk delivery vehicle until
the vehicle has been washed down and
all explosive material has been removed. Before welding or cutting on a
hollow shaft, the shaft shall be thoroughly cleaned inside and out and
vented with a minimum 1⁄2-inch diameter opening to allow for sufficient ventilation.
§ 56.6803 Blasting lines.
Permanent blasting lines shall be
properly supported. All blasting lines
shall be insulated and kept in good repair.
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GENERAL REQUIREMENTS
§ 56.6900 Damaged or deteriorated explosive material.
Damaged or deteriorated explosive
material shall be disposed of in a safe
manner in accordance with the instructions of the manufacturer.
Black powder.
(a) Black powder shall be used for
blasting only when a desired result
cannot be obtained with another type
of explosive, such as in quarrying certain types of dimension stone.
(b) Containers of black powder shall
be—
(1) Nonsparking;
(2) Kept in a totally enclosed cargo
space while being transported by a vehicle;
(3) Securely closed at all times
when—
(i) Within 50 feet of any magazine or
open flame;
(ii) Within any building in which a
fuel-fired or exposed-element electric
heater is operating; or
(iii) In an area where electrical or incandescent-particle sparks could result
in powder ignition; and
(4) Opened only when the powder is
being transferred to a blasthole or another container and only in locations
not listed in paragraph (b)(3) of this
section.
(c) Black powder shall be transferred
from containers only by pouring.
(d) Spills shall be cleaned up promptly with nonsparking equipment. Contaminated powder shall be put into a
container of water and shall be disposed of promptly after the granules
have disintegrated, or the spill area
shall be flushed promptly with water
until the granules have disintegrated
completely.
(e) Misfires shall be disposed of by
washing the stemming and powder
charge from the blasthole, and removing and disposing of the initiator in accordance with the requirement for
damaged explosives.
(f) Holes shall not be reloaded for at
least 12 hours when the blastholes have
failed to break as planned.
§ 56.6902
Excessive temperatures.
(a) Where heat could cause premature
detonation, explosive material shall
not be loaded into hot areas, such as
kilns or sprung holes.
(b) When blasting sulfide ores where
hot holes occur that may react with
explosive material in blastholes, operators shall—
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§ 56.7050
(1) Measure an appropriate number of
blasthole temperatures in order to assess the specific mine conditions prior
to the introduction of explosive material;
(2) Limit the time between the completion of loading and the initiation of
the blast to no more than 12 hours; and
(3) Take other special precautions to
address the specific conditions at the
mine to prevent premature detonation.
which to work and they are required to
use safety belts to avoid falling.
§ 56.6903
Burning explosive material.
If explosive material is suspected of
burning at the blast site, persons shall
be evacuated from the endangered area
and shall not return for at least one
hour after the burning or suspected
burning has stopped.
§ 56.6904
Smoking and open flames.
Smoking and use of open flames shall
not be permitted within 50 feet of explosive material except when separated
by permanent noncombustible barriers.
This standard does not apply to devices
designed to ignite safety fuse or to
heating devices which do not create a
fire or explosion hazard.
§ 56.6905
rial.
Protection of explosive mate-
(a) Explosive material shall be protected from temperatures in excess of
150 degrees Fahrenheit.
(b) Explosive material shall be protected from impact, except for tamping
and dropping during loading.
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Moving the drill.
When a drill is being moved from one
drilling area to another, drill steel,
tools, and other equipment shall be secured and the mast placed in a safe position.
§ 56.7009
Drill helpers.
If a drill helper assists the drill operator during movement of a drill to a
new location, the helper shall be in
sight of, or in communication with, the
operator at all times.
§ 56.7010
Power failures.
In the event of power failure, drill
controls shall be placed in the neutral
position until power is restored.
§ 56.7011
Straightening crossed cables.
The drill stem shall be resting on the
bottom of the hole or on the platform
with the stem secured to the mast before attempts are made to straighten a
crossed cable on a reel.
§ 56.7012
Tending drills in operation.
§ 56.7013 Covering or guarding drill
holes.
Equipment defects.
Drill holes large enough to constitute
a hazard shall be covered or guarded.
Drill area inspection.
The drilling area shall be inspected
for hazards before starting the drilling
operations.
§ 56.7004
§ 56.7008
DRILLING
Equipment defects affecting safety
shall be corrected before the equipment
is used.
§ 56.7003
Augers and drill stems.
Drill crews and others shall stay
clear of augers or drill stems that are
in motion. Persons shall not pass under
or step over a moving stem or auger.
While in operation, drills shall be attended at all times.
Subpart F—Drilling and Rotary Jet
Piercing
§ 56.7002
§ 56.7005
Drill mast.
Persons shall not be on a mast while
the drill-bit is in operation unless they
are provided with a safe platform from
§ 56.7018
Hand clearance.
Persons shall not hold the drill steel
while collaring holes, or rest their
hands on the chuck or centralizer while
drilling.
§ 56.7050
Tool and drill steel racks.
Receptacles or racks shall be provided for drill steel and tools stored or
carried on drills.
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§ 56.7051
30 CFR Ch. I (7–1–19 Edition)
§ 56.7051 Loose objects on the mast or
drill platform.
To prevent injury to personnel, tools
and other objects shall not be left loose
on the mast or drill platform.
§ 56.7052
Drilling positions.
Persons shall not drill from—
(a) Positions which hinder their access to the control levers;
(b) Insecure footing or insecure staging; or
(c) Atop equipment not suitable for
drilling.
§ 56.7053
Moving hand-held drills.
Before hand-held drills are moved
from one working area to another, air
shall be turned off and bled from the
hose.
§ 56.7055
Intersecting holes.
Holes shall not be drilled where there
is a danger of intersecting a misfired
hole or a hole containing explosives
blasting agents, or detonators.
[56 FR 46508, Sept. 12, 1991]
§ 56.7056
§ 56.7804 Refueling.
When rotary jet piercing equipment
requires refueling at locations other
than fueling stations, a system for
fueling without spillage shall be provided.
§ 56.7805 Smoking and open flames.
Persons shall not smoke and open
flames shall not be used in the vicinity
of the oxygen storage and supply lines.
Signs warning against smoking and
open flames shall be posted in these
areas.
§ 56.7806 Oxygen intake coupling.
The oxygen intake coupling on jetpiercing drills shall be constructed so
that only the oxygen hose can be coupled to it.
§ 56.7807 Flushing
the
combustion
chamber.
The combustion chamber of a jet
drill stem which has been sitting
unoperated in a drill hole shall be
flushed with a suitable solvent after
the stem is pulled up.
Subpart G [Reserved]
Collaring in bootlegs.
Holes shall not be collared in bootlegs.
Subpart H—Loading, Hauling, and
Dumping
[56 FR 46508, Sept. 12, 1991]
SOURCE: 53 FR 32520, Aug. 25, 1988, unless
otherwise noted.
ROTARY JET PIERCING
§ 56.7801
Jet drills.
TRAFFIC SAFETY
Jet piercing drills shall be provided
with—
(a) A system to pressurize the equipment operator’s cab, when a cab is provided; and
(b) A protective cover over the oxygen flow indicator.
§ 56.7802
Oxygen hose lines.
Safety chains or other suitable locking devices shall be provided across
connections to and between high pressure oxygen hose lines of 1-inch inside
diameter or larger.
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§ 56.7803
Lighting the burner.
A suitable means of protection shall
be provided for the employee when
lighting the burner.
§ 56.9100 Traffic control.
To provide for the safe movement of
self-propelled mobile equipment—
(a) Rules governing speed, right-ofway, direction of movement, and the
use of headlights to assure appropriate
visibility, shall be established and followed at each mine; and
(b) Signs or signals that warn of hazardous conditions shall be placed at appropriate locations at each mine.
§ 56.9101 Operating speeds and control
of equipment.
Operators of self-propelled mobile
equipment shall maintain control of
the equipment while it is in motion.
Operating speeds shall be consistent
with conditions of roadways, tracks,
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Mine Safety and Health Admin., Labor
§ 56.9300
grades, clearance, visibility, and traffic, and the type of equipment used.
(2) Brakemen and trainmen are prohibited from riding between cars of
moving trains, but may ride on the
leading end of trains or other locations
when necessary to perform their duties;
(f) To and from work areas in overcrowded mobile equipment;
(g) In mobile equipment with materials or equipment unless the items are
secured or are small and can be carried
safely by hand without creating a hazard to persons; or
(h) On conveyors unless the conveyors are designed to provide for their
safe transportation.
§ 56.9102 Movement of independently
operating rail equipment.
Movement of two or more pieces of
rail equipment operating independently on the same track shall be controlled for safe operation.
§ 56.9103
Clearance on adjacent tracks.
Railcars shall not be left on side
tracks unless clearance is provided for
traffic on adjacent tracks.
§ 56.9104
Railroad crossings.
Designated railroad crossings shall
be posted with warning signs or signals, or shall be guarded when trains
are passing. These crossings shall also
be planked or filled between the rails.
TRANSPORTATION OF PERSONS AND
MATERIALS
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§ 56.9200
§ 56.9201 Loading, hauling, and unloading of equipment or supplies.
Equipment and supplies shall be loaded, transported, and unloaded in a
manner which does not create a hazard
to persons from falling or shifting
equipment or supplies.
§ 56.9202 Loading and hauling large
rocks.
Transporting persons.
Persons shall not be transported—
(a) In or on dippers, forks, clamshells, or buckets except shaft buckets
during shaft-sinking operations or during inspection, maintenance and repair
of shafts.
(b) In beds of mobile equipment or
railcars, unless—
(1) Provisions are made for secure
travel, and
(2) Means are taken to prevent accidental unloading if the equipment is
provided with unloading devices;
(c) On top of loads in mobile equipment;
(d) Outside cabs, equipment operators’ stations, and beds of mobile
equipment, except when necessary for
maintenance, testing, or training purposes, and provisions are made for secure travel. This provision does not
apply to rail equipment.
(e) Between cars of trains, on the
leading end of trains, on the leading
end of a single railcar, or in other locations on trains that expose persons to
hazards from train movement.
(1) This paragraph does not apply to
car droppers if they are secured with
safety belts and lines which prevent
them from falling off the work platform.
Large rocks shall be broken before
loading if they could endanger persons
or affect the stability of mobile equipment. Mobile equipment used for haulage of mined material shall be loaded
to minimize spillage where a hazard to
persons could be created.
SAFETY DEVICES, PROVISIONS, AND PROCEDURES FOR ROADWAYS, RAILROADS,
AND LOADING AND DUMPING SITES
§ 56.9300
Berms or guardrails.
(a) Berms or guardrails shall be provided and maintained on the banks of
roadways where a drop-off exists of sufficient grade or depth to cause a vehicle to overturn or endanger persons in
equipment.
(b) Berms or guardrails shall be at
least mid-axle height of the largest
self-propelled mobile equipment which
usually travels the roadway.
(c) Berms may have openings to the
extent necessary for roadway drainage.
(d) Where elevated roadways are infrequently traveled and used only by
service or maintenance vehicles, berms
or guardrails are not required when all
of the following are met:
(1) Locked gates are installed at the
entrance points to the roadway.
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§ 56.9301
30 CFR Ch. I (7–1–19 Edition)
(2) Signs are posted warning that the
roadway is not bermed.
(3) Delineators are installed along
the perimeter of the elevated roadway
so that, for both directions of travel,
the reflective surfaces of at least three
delineators along each elevated shoulder are always visible to the driver and
spaced at intervals sufficient to indicate the edges and attitude of the roadway.
(4) A maximum speed limit is posted
and observed for the elevated unbermed
portions of the roadway. Factors to
consider when establishing the maximum speed limit shall include the
width, slope and alignment of the road,
the type of equipment using the road,
the road material, and any hazardous
conditions which may exist.
(5) Road surface traction is not impaired by weather conditions, such as
sleet and snow, unless corrective measures are taken to improve traction.
(e) This standard is not applicable to
rail beds.
[53 FR 32520, Aug. 25, 1988, as amended at 55
FR 37218, Sept. 7, 1990]
§ 56.9301
Dump site restraints.
Berms, bumper blocks, safety hooks,
or similar impeding devices shall be
provided at dumping locations where
there is a hazard of overtravel or overturning.
§ 56.9302 Protection against moving or
runaway railroad equipment.
Stopblocks, derail devices, or other
devices that protect against moving or
runaway rail equipment shall be installed wherever necessary to protect
persons.
§ 56.9303 Construction of ramps and
dumping facilities.
kpayne on VMOFRWIN702 with $$_JOB
Ramps and dumping facilities shall
be designed and constructed of materials capable of supporting the loads to
which they will be subjected. The
ramps and dumping facilities shall provide width, clearance, and headroom to
safely accommodate the mobile equipment using the facilities.
§ 56.9304
Unstable ground.
(a) Dumping locations shall be visually inspected prior to work com-
mencing and as ground conditions warrant.
(b) Where there is evidence that the
ground at a dumping location may fail
to support the mobile equipment, loads
shall be dumped a safe distance back
from the edge of the unstable area of
the bank.
§ 56.9305 Truck spotters.
(a) If truck spotters are used, they
shall be in the clear while trucks are
backing into dumping position or
dumping.
(b) Spotters shall use signal lights to
direct trucks where visibility is limited.
(c) When a truck operator cannot
clearly recognize the spotter’s signals,
the truck shall be stopped.
§ 56.9306 Warning devices for restricted clearances.
Where restricted clearance creates a
hazard to persons on mobile equipment, warning devices shall be installed in advance of the restricted
area and the restricted area shall be
conspicuously marked.
§ 56.9307 Design,
installation,
and
maintenance of railroads.
Roadbeds and all elements of the
railroad tracks shall be designed, installed, and maintained to provide safe
operation consistent with the speed
and type of haulage used.
§ 56.9308 Switch throws.
Switch throws shall be installed to
provide clearance to protect switchmen
from contact with moving trains.
§ 56.9309 Chute design.
Chute-loading installations shall be
designed to provide a safe location for
persons pulling chutes.
§ 56.9310 Chute hazards.
(a) Prior to chute-pulling, persons
who could be affected by the draw or
otherwise exposed to danger shall be
warned and given time to clear the hazardous area.
(b) Persons attempting to free chute
hangups shall be experienced and familiar with the task, know the hazards
involved, and use the proper tools to
free material.
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Mine Safety and Health Admin., Labor
§ 56.10007
(c) When broken rock or material is
dumped into an empty chute, the chute
shall be equipped with a guard or all
persons shall be isolated from the hazard of flying rock or material.
§ 56.9319 Going over, under, or between railcars.
Persons shall not go over, under, or
between railcars unless:
(a) The train is stopped; and
(b) The train operator, when present,
is notified and the notice acknowledged.
§ 56.9311 Anchoring stationary sizing
devices.
Grizzlies and other stationary sizing
devices shall be securely anchored.
§ 56.9312
Working around drawholes.
Unless platforms or safety lines are
used, persons shall not position themselves over drawholes if there is danger
that broken rock or material may be
withdrawn or bridged.
§ 56.9313
Roadway maintenance.
Water, debris, or spilled material on
roadways which creates hazards to the
operation of mobile equipment shall be
removed.
§ 56.9314 Trimming
muckpile faces.
stockpile
and
Stockpile and muckpile faces shall be
trimmed to prevent hazards to persons.
§ 56.9315
Dust control.
Dust shall be controlled at muck
piles,
material
transfer
points,
crushers, and on haulage roads where
hazards to persons would be created as
a result of impaired visibility.
§ 56.9316 Notifying the equipment operator.
When an operator of self-propelled
mobile equipment is present, persons
shall notify the equipment operator before getting on or off that equipment.
§ 56.9317
Suspended loads.
Persons shall not work or pass under
the buckets or booms of loaders in operation.
Subpart I—Aerial Tramways
§ 56.10001 Filling buckets.
Buckets shall not be overloaded, and
feed shall be regulated to prevent spillage.
§ 56.10002 Inspection
and
maintenance.
Inspection and maintenance of carriers (including loading and unloading
mechanisms), ropes and supports, and
brakes shall be performed by competent persons according to the recommendations of the manufacturer.
§ 56.10003 Correction of defects.
Any hazardous defects shall be corrected before the equipment is used.
§ 56.10004 Brakes.
Positive-action-type brakes and devices which apply the brakes automatically in the event of a power failure
shall be provided on aerial tramways.
§ 56.10005 Track cable connections.
Track cable connections shall not obstruct the passage of carriage wheels.
moving
§ 56.10006 Tower guards.
Towers shall be suitably protected
from swaying buckets.
Persons shall not get on or off moving mobile equipment. This provision
does not apply to trainmen, brakemen,
and car droppers who are required to
get on or off slowly moving trains in
the performance of their work duties.
§ 56.10007 Falling object protection.
Guard nets or other suitable protection shall be provided where tramways
pass over roadways, walkways, or
buildings.
§ 56.9318 Getting
equipment.
kpayne on VMOFRWIN702 with $$_JOB
§ 56.9330 Clearance for surface equipment.
Continuous clearance of at least 30
inches from the farthest projection of
moving railroad equipment shall be
provided on at least one side of the
tracks at all locations where possible
or the area shall be marked conspicuously.
on
or
off
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§ 56.10008
§ 56.10008
30 CFR Ch. I (7–1–19 Edition)
Riding tramways.
§ 56.11006
Persons other than maintenance persons shall not ride aerial tramways unless the following features are provided:
(a) Two independent brakes, each capable of holding the maximum load;
(b) Direct communication between
terminals;
(c) Power drives with emergency
power available in case of primary
power failure; and
(d) Buckets equipped with positive
locks to prevent accidental tripping or
dumping.
§ 56.10009
Riding loaded buckets.
Persons shall not ride loaded buckets.
§ 56.11007
ders.
Starting precautions.
Where possible, aerial tramways
shall not be started until the operator
has ascertained that everyone is in the
clear.
Subpart J—Travelways
§ 56.11001
§ 56.11008
Safe means of access shall be provided and maintained to all working
places.
§ 56.11002
Handrails and toeboards.
Crossovers, elevated walkways, elevated ramps, and stairways shall be of
substantial construction provided with
handrails, and maintained in good condition. Where necessary, toeboards
shall be provided.
§ 56.11003 Construction
nance of ladders.
and
mainte-
Ladders shall be of substantial construction and maintained in good condition.
§ 56.11004
Portable rigid ladders.
Portable rigid ladders shall be provided with suitable bases and placed securely when used.
kpayne on VMOFRWIN702 with $$_JOB
§ 56.11005 Fixed ladder anchorage and
toe clearance.
Fixed ladders shall be anchored securely and installed to provide at least
3 inches of toe clearance.
Restricted clearance.
Where restricted clearance creates a
hazard to persons, the restricted clearance shall be conspicuously marked.
[53 FR 32521, Aug. 25, 1988]
Walkways along conveyors.
Walkways with outboard railings
shall be provided wherever persons are
required to walk alongside elevated
conveyor belts. Inclined railed walkways shall be nonskid or provided with
cleats.
§ 56.11010
Safe access.
Wooden components of lad-
Wooden components of ladders shall
not be painted except with a transparent finish.
§ 56.11009
§ 56.10010
Fixed ladder landings.
Fixed ladders shall project at least 3
feet above landings, or subtantial
handholds shall be provided above the
landings.
Stairstep clearance.
Vertical clearance above stair steps
shall be a minimum of seven feet, or
suitable warning signs or similar devices shall be provided to indicate an
impaired clearance.
§ 56.11011
Use of ladders.
Persons using ladders shall face the
ladders and have both hands free for
climbing and descending.
§ 56.11012 Protection
around travelways.
for
Openings above, below, or near
travelways through which persons or
materials may fall shall be protected
by railings, barriers, or covers. Where
it is impractical to install such protective devices, adequate warning signals
shall be installed.
§ 56.11013
Conveyor crossovers.
Crossovers shall be provided where it
is necessary to cross conveyors.
§ 56.11014
Crossing moving conveyors.
Moving conveyors shall be crossed
only at designated crossover points.
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Mine Safety and Health Admin., Labor
§ 56.12010
§ 56.11016 Snow and ice on walkways
and travelways.
§ 56.12003 Trailing cable overload protection.
Individual overload protection or
short circuit protection shall be provided for the trailing cables of mobile
equipment.
Regularly
used
walkways
and
travelways shall be sanded, salted, or
cleared of snow and ice as soon as practicable.
§ 56.11017
Inclined fixed ladders.
Fixed ladders shall not incline backwards.
§ 56.11025 Railed
landings,
backguards, and other protection
for fixed ladders.
Fixed ladders, except on mobile
equipment, shall be offset and have
substantial railed landings at least
every 30 feet unless backguards or
equivalent protection, such as safety
belts and safety lines, are provided.
§ 56.11026 Protection for inclined fixed
ladders.
Fixed ladders 70 degrees to 90 degrees
from the horizontal and 30 feet or more
in length shall have backguards, cages
or equivalent protection, starting at a
point not more than seven feet from
the bottom of the ladders.
§ 56.11027 Scaffolds and working platforms.
Scaffolds and working platforms
shall be of substantial construction
and provided with handrails and maintained in good condition. Floor boards
shall be laid properly and the scaffolds
and working platforms shall not be
overloaded. Working platforms shall be
provided with toeboards when necessary.
Subpart K—Electricity
§ 56.12001
Circuit overload protection.
Circuits shall be protected against
excessive overload by fuses or circuit
breakers of the correct type and capacity.
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§ 56.12002
Controls and switches.
Electric equipment and circuits shall
be provided with switches or other controls. Such switches or controls shall
be of approved design and construction
and shall be properly installed.
§ 56.12004 Electrical conductors.
Electrical conductors shall be of a
sufficient size and current-carrying capacity to ensure that a rise in temperature resulting from normal operations
will not damage the insulating materials. Electrical conductors exposed to
mechanical damage shall be protected.
§ 56.12005 Protection of power conductors from mobile equipment.
Mobile equipment shall not run over
power conductors, nor shall loads be
dragged over power conductors, unless
the conductors are properly bridged or
protected.
§ 56.12006 Distribution boxes.
Distribution boxes shall be provided
with a disconnecting device for each
branch circuit. Such disconnecting devices shall be equipped or designed in
such a manner that it can be determined by visual observation when such
a device is open and that the circuit is
deenergized, the distribution box shall
be labeled to show which circuit each
device controls.
§ 56.12007 Junction box connection
procedures.
Trailing cable and power-cable connections to junction boxes shall not be
made or broken under load.
§ 56.12008 Insulation and fittings for
power wires and cables.
Power wires and cables shall be insulated adequately where they pass into
or out of electrical compartments. Cables shall enter metal frames of motors, splice boxes, and electrical compartments only through proper fittings. When insulated wires, other than
cables, pass through metal frames, the
holes shall be substantially bushed
with insulated bushings.
§ 56.12010 Isolation or insulation of
communication conductors.
Telephone and low-potential signal
wire shall be protected, by isolation or
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§ 56.12011
30 CFR Ch. I (7–1–19 Edition)
suitable insulation, or both, from contacting energized power conductors or
any other power source.
§ 56.12011 High-potential
electrical
conductors.
High-potential electrical conductors
shall be covered, insulated, or placed to
prevent contact with low potential
conductors.
§ 56.12012 Bare signal wires.
The potential on bare signal wires accessible to contact by persons shall not
exceed 48 volts.
§ 56.12013 Splices and repairs of power
cables.
Permanent splices and repairs made
in power cables, including the ground
conductor where provided, shall be:
(a) Mechanically strong with electrical conductivity as near as possible
to that of the original;
(b) Insulated to a degree at least
equal to that of the original, and sealed
to exclude moisture; and
(c) Provided with damage protection
as near as possible to that of the original, including good bonding to the
outer jacket.
kpayne on VMOFRWIN702 with $$_JOB
§ 56.12014 Handling energized power
cables.
Power cables energized to potentials
in excess of 150 volts, phase-to-ground,
shall not be moved with equipment unless sleds or slings, insulated from such
equipment, are used. When such energized cables are moved manually, insulated hooks, tongs, ropes, or slings
shall be used unless suitable protection
for persons is provided by other means.
This does not prohibit pulling or dragging of cable by the equipment it powers when the cable is physically attached to the equipment by suitable
mechanical devices, and the cable is insulated from the equipment in conformance with other standards in this
part.
§ 56.12016 Work on electrically-powered equipment.
Electrically powered equipment shall
be deenergized before mechanical work
is done on such equipment. Power
switches shall be locked out or other
measures taken which shall prevent
the equipment from being energized
without the knowledge of the individuals working on it. Suitable warning
notices shall be posted at the power
switch and signed by the individuals
who are to do the work. Such locks or
preventive devices shall be removed
only by the persons who installed them
or by authorized personnel.
§ 56.12017
Work on power circuits.
Power circuits shall be deenergized
before work is done on such circuits
unless hot-line tools are used. Suitable
warning signs shall be posted by the individuals who are to do the work.
Switches shall be locked out or other
measures taken which shall prevent
the power circuits from being energized
without the knowledge of the individuals working on them. Such locks,
signs, or preventative devices shall be
removed only by the person who installed them or by authorized personnel.
§ 56.12018 Identification
switches.
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Principal power switches shall be labeled to show which units they control,
unless identification can be made readily by location.
§ 56.12019 Access to stationary electrical equipment or switchgear.
Where access is necessary, suitable
clearance shall be provided at stationary
electrical
equipment
or
switchgear.
§ 56.12020 Protection
switchgear.
of
persons
at
Dry wooden platforms, insulating
mats, or other electrically nonconductive material shall be kept in place at
all switchboards and power-control
switches where shock hazards exist.
However, metal plates on which a person normally would stand and which
are kept at the same potential as the
grounded, metal, non-current-carrying
parts of the power switches to be operated may be used.
§ 56.12021
Danger signs.
Suitable danger signs shall be posted
at all major electrical installations.
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Mine Safety and Health Admin., Labor
§ 56.12022 Authorized persons at major
electrical installations.
Areas containing major electrical installations shall be entered only by authorized persons.
§ 56.12023 Guarding electrical connections and resistor grids.
Electrical connections and resistor
grids that are difficult or impractical
to insulate shall be guarded, unless
protection is provided by location.
§ 56.12025 Grounding
sures.
circuit
enclo-
All metal enclosing or encasing electrical circuits shall be grounded or provided with equivalent protection. This
requirement does not apply to batteryoperated equipment.
§ 56.12026 Grounding transformer and
switchgear enclosures.
Metal fencing and metal buildings
enclosing transformers and switchgear
shall be grounded.
§ 56.12027
ment.
Grounding
mobile
equip-
Frame grounding or equivalent protection shall be provided for mobile
equipment powered through trailing
cables.
§ 56.12028
Testing grounding systems.
Continuity and resistance of grounding systems shall be tested immediately after installation, repair, and
modification; and annually thereafter.
A record of the resistance measured
during the most recent tests shall be
made available on a request by the Secretary or his duly authorized representative.
§ 56.12030 Correction
conditions.
of
dangerous
When a potentially dangerous condition is found it shall be corrected before equipment or wiring is energized.
kpayne on VMOFRWIN702 with $$_JOB
§ 56.12032
§ 56.12040
§ 56.12033
Hand-held electric tools.
Hand-held electric tools shall not be
operated at high potential voltages.
§ 56.12034
Guarding around lights.
Portable extension lights, and other
lights that by their location present a
shock or burn hazard, shall be guarded.
§ 56.12035
Weatherproof lamp sockets.
Lamp sockets shall be of a weatherproof type where they are exposed to
weather or wet conditions that may
interfere with illumination or create a
shock hazard.
§ 56.12036
ment.
Fuse
removal
Inspection and cover plates on electrical equipment and junction boxes
shall be kept in place at all times except during testing or repairs.
§ 56.12037
cuits.
Fuses in high-potential cir-
Fuse tongs or hot line tools shall be
used when fuses are removed or replaced in high-potential circuits.
§ 56.12038
bles.
Attachment of trailing ca-
Trailing cables shall be attached to
machines in a suitable manner to protect the cable from damage and to prevent strain on the electrical connections.
§ 56.12039 Protection of surplus trailing cables.
Surplus trailing cables to shovels,
cranes and similar equipment shall
be—
(a) Stored in cable boats;
(b) Stored on reels mounted on the
equipment; or
(c) Otherwise protected from mechanical damage.
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Operating controls shall be installed
so that they can be operated without
danger of contact with energized conductors.
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Fuses shall not be removed or replaced by hand in an energized circuit,
and they shall not otherwise be removed or replaced in an energized circuit unless equipment and techniques
especially designed to prevent electrical shock are provided and used for
such purpose.
§ 56.12040 Installation
controls.
Inspection and cover plates.
or
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§ 56.12041
30 CFR Ch. I (7–1–19 Edition)
§ 56.12041 Design
starting boxes.
of
switches
and
Switches and starting boxes shall be
of safe design and capacity.
§ 56.12042
Track bonding.
Both rails shall be bonded or welded
at every joint and rails shall be
crossbonded at least every 200 feet if
the track serves as the return trolley
circuit. When rails are moved, replaced, or broken bonds are discovered,
they shall be rebonded within three
working shifts.
§ 56.12045
Overhead powerlines.
Overhead high-potential powerlines
shall be installed as specified by the
National Electrical Code.
§ 56.12047
Guy wires.
Guy wires of poles supporting highvoltage transmission lines shall meet
the requirements for grounding or insulator protection of the National
Electrical Safety Code, part 2, entitled
‘‘Safety Rules for the Installation and
Maintenance of Electric Supply and
Communication Lines’’ (also referred
to as National Bureau of Standards
Handbook 81, November 1, 1961) and
Supplement 2 thereof issued March
1968, which are hereby incorporated by
reference and made a part hereof.
These publications and documents may
be obtained from the National Institute of Science and Technology, 100 Bureau Drive, Stop 3460, Gaithersburg,
MD 20899–3460. Telephone: 301–975–6478
(not a toll free number); http://
ts.nist.gov/nvl; or from the Government
Printing Office, Information Dissemination (Superintendent of Documents),
P.O. Box 371954, Pittsburgh, PA 15250–
7954; Telephone: 866–512–1800 (toll free)
or 202–512–1800, http://bookstore.gpo.gov,
or may be examined in any Metal and
Nonmetal Mine Safety and Health District Office of the Mine Safety and
Health Administration.
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[50 FR 4054, Jan. 29, 1985, as amended at 60
FR 35695, July 11, 1995; 71 FR 16667, Apr. 3,
2006]
§ 56.12048 Communication conductors
on power poles.
Telegraph, telephone, or signal wires
shall not be installed on the same
crossarm with power conductors. When
carried on poles supporting powerlines,
they shall be installed as specified by
the National Electrical Code.
§ 56.12050 Installation of trolley wires.
Trolley wires shall be installed at
least seven feet above rails where
height permits, and aligned and supported to suitably control sway and
sag.
§ 56.12053 Circuits powered from trolley wires.
Ground wires for lighting circuits
powered from trolley wires shall be
connected securely to the ground-return circuit.
§ 56.12065 Short circuit and lightning
protection.
Powerlines, including trolley wires,
and telephone circuits shall be protected against short circuits and lightning.
§ 56.12066 Guarding trolley wires and
bare powerlines.
Where metallic tools or equipment
can come in contact with trolley wires
or bare powerlines, the lines shall be
guarded or deenergized.
§ 56.12067 Installation of transformers.
Transformers shall be totally enclosed, or shall be placed at least 8 feet
above the ground, or installed in a
transformer house, or surrounded by a
substantial fence at least 6 feet high
and at least 3 feet from any energized
parts, casings, or wiring.
§ 56.12068 Locking transformer enclosures.
Transformer enclosures shall be kept
locked against unauthorized entry.
§ 56.12069 Lightning protection for
telephone wires and ungrounded
conductors.
Each ungrounded power conductor or
telephone wire that leads underground
and is directly exposed to lightning
shall be equipped with suitable lightning arrestors of approved type within
100 feet of the point where the circuit
enters the mine. Lightning arrestors
shall be connected to a low resistance
grounding medium on the surface and
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§ 56.13021
shall be separated from neutral
grounds by a distance of not less than
25 feet.
§ 56.13012 Compressor air intakes.
Compressor air intakes shall be installed to ensure that only clean,
uncontaminated air enters the compressors.
§ 56.12071 Movement or operation of
equipment near high-voltage power
lines.
When equipment must be moved or
operated near energized high-voltage
powerlines (other than trolley lines)
and the clearance is less than 10 feet,
the lines shall be deenergized or other
precautionary measures shall be taken.
Subpart L—Compressed Air and
Boilers
§ 56.13001 General requirements
boilers and pressure vessels.
for
All boilers and pressure vessels shall
be constructed, installed, and maintained in accordance with the standards and specifications of the American
Society of Mechanical Engineers Boiler
and Pressure Vessel Code.
§ 56.13010 Reciprocating-type air compressors.
(a) Reciprocating-type air compressors rated over 10 horsepower shall be
equipped with automatic temperatureactuated shutoff mechanisms which
shall be set or adjusted to the compressor when the normal operating
temperature is exceeded by more than
25 percent.
(b) However, this standard does not
apply to reciprocating-type air compressors rated over 10 horsepower if
equipped with fusible plugs that were
installed in the compressor discharge
lines before November 15, 1979, and designed to melt at temperatures at least
50 degrees below the flash point of the
compressors’ lubricating oil.
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§ 56.13011
Air receiver tanks.
Air receiver tanks shall be equipped
with one or more automatic pressurerelief valves. The total relieving capacity of the relief valves shall prevent
pressure from exceeding the maximum
allowable working pressure in a receiver tank by not more than 10 percent. Air receiver tanks also shall be
equipped with indicating pressure
gauges which accurately measure the
pressure within the air receiver tanks.
§ 56.13015 Inspection of compressedair receivers and other unfired
pressure vessels.
(a) Compressed-air receivers and
other unfired pressure vessels shall be
inspected by inspectors holding a valid
National Board Commission and in accordance with the applicable chapters
of the National Board Inspection Code,
a Manual for Boiler and Pressure Vessel Inspectors, 1979. This code is incorporated by reference and made a part
of this standard. It may be examined at
any Metal and Nonmetal Mine Safety
and Health District Office of the Mine
Safety and Health Administration, and
may be obtained from the publisher,
the National Board of Boiler and Pressure Vessel Inspector, 1055 Crupper Avenue, Columbus, Ohio 43229.
(b) Records of inspections shall be
kept in accordance with requirements
of the National Board Inspection Code,
and the records shall be made available
to the Secretary or his authorized representative.
§ 56.13017 Compressor
discharge
pipes.
Compressor discharge pipes where
carbon build-up may occur shall be
cleaned periodically as recommended
by the manufacturer, but no less frequently than once every two years.
§ 56.13019 Pressure system repairs.
Repairs involving the pressure system of compressors, receivers, or compressed-air-powered equipment shall
not be attempted until the pressure has
been bled off.
§ 56.13020 Use of compressed air.
At no time shall compressed air be
directed toward a person. When compressed air is used, all necessary precautions shall be taken to protect persons from injury.
§ 56.13021 High-pressure hose connections.
Except where automatic shutoff
valves are used, safety chains or other
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§ 56.13030
30 CFR Ch. I (7–1–19 Edition)
suitable locking devices shall be used
at connections to machines of highpressure hose lines of 3⁄4-inch inside diameter or larger, and between highpressure hose lines of 3⁄4-inch inside diameter or larger, where a connection
failure would create a hazard.
§ 56.13030 Boilers.
(a) Fired pressure vessels (boilers)
shall be equipped with water level
gauges, pressure gauges, automatic
pressure-relief valves, blowdown piping, and other safety devices approved
by the American Society of Mechanical
Engineers to protect against hazards
from overpressure, flameouts, fuel
interruptions and low water level, all
as required by the appropriate sections,
chapters and appendices listed in paragraphs (b) (1) and (2) of this section.
(b) These gauges, devices and piping
shall be designed, installed, operated,
maintained, repaired, altered, inspected, and tested by inspectors holding a valid National Board Commission
and in accordance with the following
listed sections, chapters and appendices:
(1) The ASME Boiler and Pressure
Vessel Code, 1977, Published by the
American Society of Mechanical Engineers.
SECTION AND TITLE
I Power Boilers.
II Material Specifications—Part A—Ferrous.
II Material Specifications—Part B—Nonferrous.
II Material Specifications—Part C—Welding Rods, Electrodes, and Filler Metals.
IV Heating Boilers
V Nondestructive Examination
VI Recommended Rules for Care and Operation of Heating Boilers
VII Recommended Rules for Care of Power
Boilers
(2) The National Board Inspection
Code, a Manual for Boiler and Pressure
Vessel Inspectors, 1979, published by
the National Board of Boiler and Pressure Vessel Inspectors.
IV Shop Inspection of Boilers and Pressure
Vessels
V Inservice Inspection of Pressure Vessels
by Authorized Owner-User Inspection
Agencies
APPENDIX AND TITLE
A Safety and Safety Relief Valves
B Non-ASME Code Boilers and Pressure
Vessels
C Storage of Mild Steel Covered Arc Welding Electrodes
D-R National Board ‘‘R’’ (Repair) Symbol
Stamp
D-VR National Board ‘‘VR’’ (Repair of Safety and Safety Relief Valve) Symbol Stamp
D-VR1 Certificate of Authorization for Repair Symbol Stamp for Safety and Safety
Relief Valves
D-VR2 Outline of Basic Elements of Written
Quality Control System for Repairers of
ASME Safety and Safety Relief Valves
D-VR3 Nameplate Stamping for ‘‘VR’’
E Owner-user Inspection Agencies
F Inspection Forms
(c) Records of inspections and repairs
shall be kept in accordance with the requirements of the ASME Boiler and
Pressure Vessel Code and the National
Board Inspection Code. The records
shall be made available to the Secretary or his authorized representative.
(d) Sections of the ASME Boiler and
Pressure Vessel Code, 1977, listed in
paragraph (b)(1) of this section, and
chapters and appendices of the National Board Inspection Code, 1979, listed in paragraph (b)(2) of this section,
are incorporated by reference and made
a part of this standard. These publications may be obtained from the publishers, the American Society of Mechanical Engineers, 22 Law Drive, P.O.
Box 2900, Fairfield, New Jersey 07007,
Phone: 800–843–2763 (toll free); http://
www.asme.org, and the National Board
of Boiler and Pressure Vessel Inspectors, 1055 Crupper Avenue, Columbus,
Ohio 43229. The publications may be examined at any Metal and Nonmetal
Mine Safety and Health District Office
of the Mine Safety and Health Administration.
[50 FR 4054, Jan. 29, 1985, as amended at 71
FR 16667, Apr. 3, 2006]
kpayne on VMOFRWIN702 with $$_JOB
CHAPTER AND TITLE
I Glossary of Terms
II Inspection of Boilers and Pressure Vessels
III Repairs and Alterations to Boiler and
Pressure Vessels by Welding
Subpart M—Machinery and
Equipment
SOURCE: 53 FR 32521, Aug. 25, 1988, unless
otherwise noted.
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Mine Safety and Health Admin., Labor
§ 56.14101
§ 56.14000 Definitions.
The following definitions apply in
this subpart.
Travelway. A passage, walk, or way
regularly used or designated for persons to go from one place to another.
mine or nearest mine office from the
date the defects are recorded, until the
defects are corrected. Such records
shall be made available for inspection
by an authorized representative of the
Secretary.
[53 FR 32521, Aug. 25, 1988, as amended at 69
FR 38840, June 29, 2004]
§ 56.14101
SAFETY DEVICES AND MAINTENANCE
REQUIREMENTS
§ 56.14100 Safety defects; examination,
correction and records.
(a) Self-propelled mobile equipment
to be used during a shift shall be inspected by the equipment operator before being placed in operation on that
shift.
(b) Defects on any equipment, machinery, and tools that affect safety
shall be corrected in a timely manner
to prevent the creation of a hazard to
persons.
(c) When defects make continued operation hazardous to persons, the defective items including self-propelled
mobile equipment shall be taken out of
service and placed in a designated area
posted for that purpose, or a tag or
other effective method of marking the
defective items shall be used to prohibit further use until the defects are
corrected.
(d) Defects on self-propelled mobile
equipment affecting safety, which are
not corrected immediately, shall be reported to and recorded by the mine operator. The records shall be kept at the
Brakes.
(a) Minimum requirements. (1) Self-propelled mobile equipment shall be
equipped with a service brake system
capable of stopping and holding the
equipment with its typical load on the
maximum grade it travels. This standard does not apply to equipment which
is not originally equipped with brakes
unless the manner in which the equipment is being operated requires the use
of brakes for safe operation. This
standard does not apply to rail equipment.
(2) If equipped on self-propelled mobile equipment, parking brakes shall be
capable of holding the equipment with
its typical load on the maximum grade
it travels.
(3) All braking systems installed on
the equipment shall be maintained in
functional condition.
(b) Testing. (1) Service brake tests
shall be conducted when an MSHA inspector has reasonable cause to believe
that the service brake system does not
function as required, unless the mine
operator removes the equipment from
service for the appropriate repair;
(2) The performance of the service
brakes shall be evaluated according to
Table M–1.
TABLE M–1
Equipment speed, MPH
Gross vehicle weight lbs.
10
11
12
13
14
15
16
17
18
19
20
64
76
88
100
105
111
70
83
95
108
114
120
76
90
103
116
123
129
83
97
111
125
132
139
89
104
119
133
141
148
Service Brake Maximum Stopping Distance—Feet
0–36000 ............................................................
36000–70000 ....................................................
70000–140000 ..................................................
140000–250000 ................................................
250000–400000 ................................................
Over 400000 .....................................................
34
41
48
56
59
63
38
46
54
62
66
71
43
52
61
69
74
78
48
58
67
77
81
86
53
62
74
84
89
94
59
70
81
92
97
103
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Stopping distances are computed using a constant decleration of 9.66 FPS2 and system response response times of .5.1, 1.5,
2, 2.25 and 2.5 seconds for each increasing weight category respectively. Stopping distance values include a one-second operator response time.
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§ 56.14102
30 CFR Ch. I (7–1–19 Edition)
TABLE M–2—THE SPEED OF A VEHICLE CAN BE DETERMINED BY CLOCKING IT THROUGH A 100-FOOT
MEASURED COURSE AT CONSTANT VELOCITY USING TABLE M–2. WHEN THE SERVICE BRAKES ARE
APPLIED AT THE END OF THE COURSE, STOPPING DISTANCE CAN BE MEASURED AND COMPARED
TO TABLE M–1.
Miles per hour
10
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Seconds Required to Travel 100 Feet .............
11
6.8
12
6.2
(3) Service brake tests shall be conducted under the direction of the mine
operator in cooperation with an according to the instructions provided by
the MSHA inspector as follows:
(i) Equipment capable of traveling at
least 10 miles per hour shall be tested
with a typical load for that particular
piece of equipment. Front-end loaders
shall be tested with the loader bucket
empty. Equipment shall not be tested
when carrying hazardous loads, such as
explosives.
(ii) The approach shall be sufficient
length to allow the equipment operator
to reach and maintain a constant speed
between 10 and 20 miles per hour prior
to entering the 100 foot measured area.
The constant speed shall be maintained
up to the point when the equipment operator receives the signal to apply the
brakes. The roadway shall be wide
enought to accommodate the size of
the equipment being tested. The
ground shall be generally level, packed,
and dry in the braking portion of the
test course. Ground moisture may be
present to the extent that it does not
adversely affect the braking surface.
(iii) Braking is to be performed using
only those braking systems, including
auxiliary retarders, which are designed
to bring the equipment to a stop under
normal operating conditions. Parking
or emergency (secondary) brakes are
not to be actuated during the test.
(iv) The tests shall be conducted with
the transmission in the gear appropriate for the speed the equipment is
traveling except for equipment which
is designed for the power train to be
disengaged during braking.
(v) Testing speeds shall be a minimum of 10 miles per hour and a maximum of 20 miles per hour.
(vi) Stopping distances shall be measured from the point at which the equipment operator receives the signal to
apply the service brakes to the final
stopped position.
5.7
13
5.2
14
4.9
15
4.5
16
4.3
17
4.0
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3.8
19
20
3.6
3.4
(4) Test results shall be evaluated as
follows:
(i) If the initial test run is valid and
the stopping distance does not exceed
the corresponding stopping distance
listed in Table 1, the performance of
the service brakes shall be considered
acceptable. For tests to be considered
valid, the equipment shall not slide
sideways or exhibit other lateral motion during the braking portion of the
test.
(ii) If the equipment exceeds the
maximum stopping distance in the initial test run, the mine operator may
request from the inspector up to four
additional test runs with two runs to
be conducted in each direction. The
performance of the service brakes shall
be considered acceptable if the equipment does not exceed the maximum
stopping distance on at least three of
the additional tests.
(5) Where there is not an appropriate
test site at the mine or the equipment
is not capable or traveling at least 10
miles per hour, service brake tests will
not be conducted. In such cases, the inspector will rely upon other available
evidence to determine whether the
service brake system meets the performance requirement of this standard.
[53 FR 32521, Aug. 25, 1988; 53 FR 44588, Nov.
4, 1988]
§ 56.14102
Brakes for rail equipment.
Braking systems on railroad cars and
locomotives shall be maintained in
functional condition.
§ 56.14103
Operators stations.
(a) If windows are provided on operators’ stations of self-propelled mobile
equipment, the windows shall be made
of safety glass or material with equivalent safety characteristics. The windows shall be maintained to provide
visibility for safe operation.
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Mine Safety and Health Admin., Labor
(b) If damaged windows obscure visibility necessary for safe operation, or
create a hazard to the equipment operator, the windows shall be replaced or
removed. Damaged windows shall be replaced if absence of a window would expose the equipment operator to hazardous evironmental conditions which
would affect the ability of the equipment operator to safely operate the
equipment.
(c) The operator’s stations of selfpropelled mobile equipment shall—
(1) Be free of materials that could
create a hazard to persons by impairing
the safe operation of the equipment;
and
(2) Not be modified, in a manner that
obscures visibility necessary for safe
operation.
§ 56.14104
Tire repairs.
(a) Before a tire is removed from a
vehicle for tire repair, the valve core
shall be partially removed to allow for
gradual deflation and then removed.
During deflation, to the extent possible, persons shall stand outside of the
potential trajectory of the lock ring of
a multi-piece wheel rim.
(b) To prevent injury from wheel
rims during tire inflation, one of the
following shall be used:
(1) A wheel cage or other restraining
device that will constrain all wheel rim
components during an explosive separation of a multi-piece wheel rim, or
during the sudden release of contained
air in a single piece rim wheel; or
(2) A stand-off inflation device which
permits persons to stand outside of the
potential trajectory of wheel components.
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§ 56.14105 Procedures during repairs
or maintenance.
Repairs or maintenance of machinery
or equipment shall be performed only
after the power is off, and the machinery or equipment blocked against hazardous motion. Machinery or equipment motion or activation is permitted
to the extent that adjustments or testing cannot be performed without motion or activation, provided that persons are effectively protected from hazardous motion.
§ 56.14110
§ 56.14106
Falling object protection.
(a) Fork-lift trucks, front-end loaders, and bulldozers shall be provided
with falling object protective structures if used in an area where falling
objects could create a hazard to the
equipment operator.
(b) The protective structure shall be
capable of withstanding the falling object loads to which it would be subjected.
§ 56.14107
Moving machine parts.
(a) Moving machine parts shall be
guarded to protect persons from contacting gears, sprockets, chains, drive,
head,
tail,
and
takeup
pulleys,
flywheels, couplings, shafts, fan blades,
and similar moving parts that can
cause injury.
(b) Guards shall not be required
where the exposed moving parts are at
least seven feet away from walking or
working surfaces.
§ 56.14108
Overhead drive belts.
Overhead drive belts shall be guarded
to contain the whipping action of a
broken belt if that action could be hazardous to persons.
§ 56.14109 Unguarded conveyors with
adjacent travelways.
Unguarded conveyors next to the
travelways shall be equipped with—
(a) Emergency stop devices which are
located so that a person falling on or
against the conveyor can readily deactivate the conveyor drive motor; or
(b) Railings which—
(1) Are positioned to prevent persons
from falling on or against the conveyor;
(2) Will be able to withstand the vibration, shock, and wear to which they
will be subjected during normal operation; and
(3) Are constructed and maintained
so that they will not create a hazard.
§ 56.14110
Flying or falling materials.
In areas where flying or falling materials generated from the operation of
screens, crushers, or conveyors present
a hazard, guards, shields, or other devices that provide protection against
such flying or falling materials shall be
provided to protect persons.
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§ 56.14111
30 CFR Ch. I (7–1–19 Edition)
§ 56.14111 Slusher,
and securing.
backlash
guards
(a) When persons are exposed to
slushing operations, the slushers shall
be equipped with rollers and drum covers and anchored securely before
slushing operations are started.
(b) Slushers rated over 10 horsepower
shall be equipped with backlash guards,
unless the equipment operator is otherwise protected.
(c) This standard does not apply to
air tuggers of 10 horsepower or less
that have only one cable and one drum.
§ 56.14112 Construction
nance of guards.
and
mainte-
(a) Guards shall be constructed and
maintained to—
(1) Withstand the vibration, shock,
and wear to which they will be subjected during normal operation; and
(2) Not create a hazard by their use.
(b) Guards shall be securely in place
while machinery is being operated, except when testing or making adjustments which cannot be performed without removal of the guard.
§ 56.14113 Inclined
stops or brakes.
conveyors:
back-
Backstops or brakes shall be installed on drive units of inclined conveyors to prevent the conveyors from
running in reverse, creating a hazard
to persons.
§ 56.14114 Air valves
equipment.
for
pneumatic
A manual master quick-close type air
valve shall be installed on all pneumatic-powered equipment if there is a
hazard of uncontrolled movement when
the air supply is activated. The valve
shall be closed except when the equipment is being operated.
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§ 56.14115 Stationary
chines.
grinding
ma-
Stationary grinding machines, other
than special bit grinders, shall be
equipped with—
(a) Peripheral hoods capable of withstanding the force of a bursting wheel
and enclosing not less than 270° of the
periphery of the wheel;
(b) Adjustable tool rests set so that
the distance between the grinding sur-
face of the wheel and the tool rest in
not greater than 1⁄8 inch; and
(c) A safety washer on each side of
the wheel.
[53 FR 32521, Aug. 25, 1988; 53 FR 44588, Nov.
4, 1988]
§ 56.14116 Hand-held power tools.
(a) Power drills, disc sanders, grinders and circular and chain saws, when
used in the hand-held mode shall be operated with controls which require constant hand or finger pressure.
(b) Circular saws and chain saws
shall not be equipped with devices
which lock-on the operating controls.
§ 56.14130 Roll-over protective structures (ROPS) and seat belts.
(a) Equipment included. Roll-over protective structures (ROPS) and seat
belts shall be installed on—
(1) Crawler tractors and crawler loaders;
(2) Graders;
(3) Wheel loaders and wheel tractors;
(4) The tractor portion of semimounted scrapers, dumpers, water wagons, bottom-dump wagons, rear-dump
wagons, and towed fifth wheel attachments;
(5) Skid-steer loaders; and
(6) Agricultural tractors.
(b) ROPS construction. ROPS shall
meet the requirements of the following
Society of Automotive Engineers
(SAE) publications, as applicable,
which are incorporated by reference:
(1) SAE J1040, ‘‘Performance Criteria
for Roll-Over Protective Structures
(ROPS) for Construction, Earthmoving,
Forestry, and Mining Machines,’’, 1986;
or
(2) SAE J1194, ‘‘Roll-Over Protective
Structures (ROPS) for Wheeled Agricultural Tractors’’, 1983.
(c) ROPS labelling. ROPS shall have a
label permanently affixed to the structure identifying—
(1) The manufacturer’s name and address;
(2) The ROPS model number; and
(3) The make and model number of
the equipment for which the ROPS is
designed.
(d) ROPS installation. ROPS shall be
installed on the equipment in accordance with the recommendations of the
ROPS manufacturer.
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Mine Safety and Health Admin., Labor
§ 56.14131
(e) ROPS maintenance. (1) ROPS shall
be maintained in a condition that
meets the performance requirements
applicable to the equipment. If the
ROPS is subjected to roll-over an abnormal structural loading, the equipment manufacturer or a registered professional engineer with knowledge and
experience in ROPS design shall recertify that the ROPS meets the applicable performance requirements before it
is returned to service.
(2) Alterations or repairs on ROPS
shall be performed only with approval
from the ROPS manufacturer or under
the instructions of a registered professional engineer with knowledge and experience in ROPS design. The manufacturer or engineer shall certify that the
ROPS meets the applicable performance requirements.
(f) Exemptions. (1) This standard does
not apply to—
(i) Self-propelled mobile equipment
manufactured prior to July 1, 1969;
(ii) Over-the-road type tractors that
pull trailers or vans on highways;
(iii) Equipment that is only operated
by remote control; and
(2) Self-propelled mobile equipment
manufactured prior to October 24, 1988,
that is equipped with ROPS and seat
belts that meet the installation and
performance requirements of 30 CFR
56.9088 (1986 edition) shall be considered
in compliance with paragraphs (b) and
(h) of this section.
(g) Wearing seat belts. Seat belts shall
be worn by the equipment operator except that when operating graders from
a standing position, the grader operator shall wear safety lines and a harness in place of a seat belt.
(h) Seat belts construction. Seat belts
required under this section shall meet
the requirement of SAE J386, ‘‘Operator Restraint System for Off-Road
Work Machines’’ (1985, 1993, or 1997), or
SAE J1194, ‘‘Roll-Over Protective
Structures (ROPS) for Wheeled Agricultural Tractors’’ (1983, 1989, 1994, or
1999), as applicable, which are incorporated by reference.
(i) Seat belt maintenance. Seat belts
shall be maintained in functional condition, and replaced when necessary to
assure proper performance.
(j) Publications. The incorporation by
reference of these publications is ap-
proved by the Director of the Federal
Register in accordance with 5 U.S.C.
552(a) and 1 CFR part 51. Copies of
these publications may be examined at
any Metal and Nonmetal Mine Safety
and Health District Office; at MSHA’s
Office of Standards, Regulations, and
Variances, 201 12th Street South, Arlington, VA 22202–5452; 202–693–9440; or
at the National Archives and Records
Administration (NARA). For information on the availability of this material at NARA, call 202–741–6030, or go
to:
http://www.archives.gov/
federallregister/
codeloflfederallregulations/
ibrllocations.html. Copies may be purchased from the Society of Automotive
Engineers, 400 Commonwealth Drive,
Warrendale, PA 15096–0001; 724–776–4841;
http://www.sae.org.
[53 FR 32521, Aug. 25, 1988; 53 FR 44588, Nov.
4, 1988, as amended at 60 FR 33723, June 29,
1995; 67 FR 38385, June 4, 2002; 68 FR 19347,
Apr. 21, 2003; 80 FR 52987, Sept. 2, 2015]
§ 56.14131 Seat
belts
for
haulage
trucks.
(a) Seat belts shall be provided and
worn in haulage trucks.
(b) Seat belts shall be maintained in
functional condition, and replaced
when necessary to assure proper performance.
(c) Seat belts required under this section shall meet the requirements of
SAE J386, ‘‘Operator Restraint System
for Off-Road Work Machines’’ (1985,
1993, or 1997), which are incorporated by
reference.
(d) The incorporation by reference of
these publications is approved by the
Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR
part 51. Copies of these publications
may be examined at any Metal and
Nonmetal Mine Safety and Health District Office; at MSHA’s Office of Standards, Regulations, and Variances, 201
12th Street South, Arlington, VA 22202–
5452; 202–693–9440; or at the National Archives and Records Administration
(NARA). For information on the availability of this material at NARA, call
202–741–6030,
or
go
to:
http://
www.archives.gov/federallregister/
codeloflfederallregulations/
ibrllocations.html. Copies may be purchased from the Society of Automotive
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§ 56.14132
30 CFR Ch. I (7–1–19 Edition)
Engineers, 400 Commonwealth Drive,
Warrendale, PA 15096–0001; 724–776–4841;
http://www.sae.org.
[50 FR 4054, Jan. 29, 1985, as amended at 67
FR 38385, June 4, 2002; 68 FR 19347, Apr. 21,
2003; 80 FR 52987, Sept. 2, 2015]
§ 56.14202 Manual
veyor pulleys.
cleaning
con-
Pulleys of conveyors shall not be
cleaned manually while the conveyor is
in motion.
SAFETY PRACTICES AND OPERATIONAL
PROCEDURES
(a) When moving mobile equipment
between workplaces, booms, forks,
buckets, beds, and similar movable
parts of the equipment shall be positioned in the travel mode and, if required for safe travel, mechanically secured.
(b) When mobile equipment is unattended or not in use, dippers, buckets
and scraper blades shall be lowered to
the ground. Other movable parts, such
as booms, shall be mechanically secured or positioned to prevent movement which would create a hazard to
persons.
§ 56.14201 Conveyor start-up warnings.
(a) When the entire length of a conveyor is visible from the starting
switch, the conveyor operator shall visually check to make certain that all
persons are in the clear before starting
the conveyor.
(b) When the entire length of the conveyor is not visible from the starting
switch, a system which provides visible
or audible warning shall be installed
and operated to warn persons that the
§ 56.14203
Application of belt dressing.
Belt dressings shall not be applied
manually while belts are in motion unless a pressurized-type applicator is
used that allows the dressing to be applied from outside the guards.
§ 56.14204
Machinery lubrication.
Machinery or equipment shall not be
lubricated manually while it is in motion where application of the lubricant
may expose persons to injury.
§ 56.14205
tools.
Machinery, equipment, and
Machinery, equipment, and tools
shall not be used beyond the design capacity intended by the manufacturer
where such use may create a hazard to
persons.
§ 56.14206
Securing movable parts.
[53 FR 32521, Aug. 25, 1988; 53 FR 44588, Nov.
4, 1988]
§ 56.14207 Parking procedures for unattended equipment.
Mobile equipment shall not be left
unattended unless the controls are
placed in the park position and the
parking brake, if provided, is set. When
parked on a grade, the wheels or tracks
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§ 56.14132 Horns and backup alarms.
(a) Manually-operated horns or other
audible warning devices provided on
self-propelled mobile equipment as a
safety feature shall be maintained in
functional condition.
(b)(1) When the operator has an obstructed view to the rear, self-propelled
mobile equipment shall have—
(i) An automatic reverse-activated
signal alarm;
(ii) A wheel-mounted bell alarm
which sounds at least once for each
three feet of reverse movement;
(iii) A discriminating backup alarm
that covers the area of obstructed
view; or
(iv) An observer to signal when it is
safe to back up.
(2) Alarms shall be audible above the
surrounding noise level.
(3) An automatic reverse-activated
strobe light may be used at night in
lieu of an audible reverse alarm.
(c) This standard does not apply to
rail equipment.
§ 56.14200 Warnings prior to starting
or moving equipment.
Before starting crushers or moving
self-propelled mobile equipment, equipment operators shall sound a warning
that is audible above the surrounding
noise level or use other effective means
to warn all persons who could be exposed to a hazard from the equipment.
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conveyor will be started. Within 30 seconds after the warning is given, the
conveyor shall be started or a second
warning shall be given.
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Mine Safety and Health Admin., Labor
§ 56.14215
of mobile equipment shall be either
chocked or turned into a bank.
(b) Persons shall not work on top of,
under, or work from a raised component of mobile equipment until the
component has been blocked or mechanically secured to prevent accidental lowering. The equipment must
also be blocked or secured to prevent
rolling.
(c) A raised component must be secured to prevent accidental lowering
when persons are working on or around
mobile equipment and are exposed to
the hazard of accidental lowering of
the component.
(d) Under this section, a raised component of mobile equipment is considered to be blocked or mechanically secured if provided with a functional
load-locking device or a device which
prevents free and uncontrolled descent.
(e) Blocking or mechanical securing
of the raised component is required
during repair or maintenance of elevated mobile work platforms.
§ 56.14208
Warning devices.
(a) Visible warning devices shall be
used when parked mobile equipment
creates a hazard to persons in other
mobile equipment.
(b) Mobile equipment, other than
forklifts, carrying loads that project
beyond the sides or more than four feet
beyond the rear of the equipment shall
have a warning flag at the end of the
projection. Under conditions of limited
visibility these loads shall have a
warning light at the end of the projection. Such flag or lights shall be attached to the end of the projection or
be carried by persons walking beside or
behind the projection.
§ 56.14209
ing.
Safety procedures for tow-
(a) A properly sized tow bar or other
effective means of control shall be used
to tow mobile equipment.
(b) Unless steering and braking are
under the control of the equipment operator on the towed equipment, a safety chain or wire rope capable of withstanding the loads to which it could be
subjected shall be used in conjunction
with any primary rigging.
(c) This provision does not apply to
rail equipment.
§ 56.14210 Movement of dippers, buckets, loading booms, or suspended
loads.
(a) Dippers, buckets, loading booms,
or suspended loads shall not be swung
over the operators’ stations of self-propelled mobile equipment until the
equipment operator is out of the operator’s station and in a safe location.
(b) This section does not apply when
the equipment is specifically designed
to protect the equipment operator from
falling objects.
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§ 56.14211 Blocking
raised position.
equipment
in
a
(a) Persons shall not work on top of,
under, or work from mobile equipment
in a raised position until the equipment has been blocked or mechanically
secured to prevent it from rolling or
falling accidentally.
§ 56.14212
belts.
Chains,
ropes,
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Chains, ropes, and drive belts shall be
guided mechanically onto moving pulleys, sprockets, or drums except where
equipment is designed specifically for
hand feeding.
§ 56.14213 Ventilation
for welding.
and
shielding
(a) Welding operations shall be
shielded when performed at locations
where arc flash could be hazardous to
persons.
(b) All welding operations shall be
well-ventilated.
§ 56.14214
Train warnings.
A warning that is audible above the
surrounding noise level shall be sounded—
(a) Immediately prior to moving
trains;
(b) When trains approach persons,
crossings, other trains on adjacent
tracks; and
(c) Any place where the train operator’s vision is obscured.
§ 56.14215
cars.
Coupling
or
uncoupling
Prior to coupling or uncoupling cars
manually, trains shall be brought to a
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§ 56.14216
30 CFR Ch. I (7–1–19 Edition)
complete stop, and then moved at minimum tram speed until the coupling or
uncoupling activity is completed. Coupling or uncoupling shall not be attempted from the inside of curves unless the railroad and cars are designed
to eliminate hazards to persons.
§ 56.14216
Backpoling.
Backpoling of trolleys is prohibited
except where there is inadequate clearance to reverse the trolley pole. Where
backpoling is required, it shall be done
only at the minimum tram speed of the
trolley.
§ 56.14217
Securing parked railcars.
Parked railcars shall be blocked securely unless held effectively by
brakes.
§ 56.14218 Movement of equipment on
adjacent tracks.
When a locomotive on one track is
used to move rail equipment on adjacent tracks, a chain, cable, or drawbar
shall be used which is capable of meeting the loads to which it could be subjected.
§ 56.14219
Brakeman signals.
When a train is under the direction of
a brakeman and the train operator cannot clearly recognize the brakeman’s
signals, the train operator shall bring
the train to a stop.
APPENDIX I TO SUBPART M OF PART 56—
NATIONAL CONSENSUS STANDARDS
Mine operators seeking further information regarding the construction and installation of falling object protective structures
(FOPS) may consult the following national
consensus standards, as applicable.
MSHA STANDARD 56.14106, FALLING OBJECT
PROTECTION.
Equipment
Front-end loaders
and bulldozers.
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Fork-lift trucks ........
National consensus standard
Society of Automotive Engineers (SAE)
minimum performance criteria for
falling object protective structures
(FOPS) SAE J231—January, 1981.
American National Standards Institute
(ANSI) safety standard for low lift
and high lift trucks, B 56.1, section
7.27—1983; or,
American National Standards Institute
(ANSI) standard, rough terrain fork
lift trucks, B56.6—1987.
Subpart N—Personal Protection
§ 56.15001
First-aid materials.
Adequate first-aid materials, including stretchers and blankets, shall be
provided at places convenient to all
working areas. Water or neutralizing
agents shall be available where corrosive chemicals or other harmful substances are stored, handled, or used.
§ 56.15002
Hard hats.
All persons shall wear suitable hard
hats when in or around a mine or plant
where falling objects may create a hazard.
§ 56.15003
Protective footwear.
All persons shall wear suitable protective footwear when in or around an
area of a mine or plant where a hazard
exists which could cause an injury to
the feet.
§ 56.15004
Eye protection.
All persons shall wear safety glasses,
goggles, or face shields or other suitable protective devices when in or
around an area of a mine or plant
where a hazard exists which could
cause injury to unprotected eyes.
§ 56.15005
Safety belts and lines.
Safety belts and lines shall be worn
when persons work where there is danger of falling; a second person shall
tend the lifeline when bins, tanks, or
other dangerous areas are entered.
§ 56.15006 Protective equipment and
clothing for hazards and irritants.
Special protective equipment and
special protective clothing shall be
provided, maintained in a sanitary and
reliable condition and used whenever
hazards of process or environment,
chemical hazards, radiological hazards,
or mechanical irritants are encountered in a manner capable of causing
injury or impairment.
§ 56.15007 Protective equipment or
clothing for welding, cutting, or
working with molten metal.
Protective clothing or equipment and
face shields, or goggles shall be worn
when welding, cutting, or working with
molten metal.
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Mine Safety and Health Admin., Labor
§ 56.16012
§ 56.15014 Eye protection when operating grinding wheels.
Face shields or goggles in good condition shall be worn when operating a
grinding wheel.
§ 56.16003 Storage of hazardous materials.
Materials that can create hazards if
accidentally liberated from their containers shall be stored in a manner
that minimizes the dangers.
[53 FR 32526, Aug. 25, 1988]
§ 56.15020 Life jackets and belts.
Life jackets or belts shall be worn
where there is danger from falling into
water.
Subpart O—Materials Storage and
Handling
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§ 56.16001 Stacking and storage of materials.
Supplies shall not be stacked or
stored in a manner which creates tripping or fall-of-material hazards.
§ 56.16002 Bins, hoppers, silos, tanks,
and surge piles.
(a) Bins, hoppers, silos, tanks, and
surge piles, where loose unconsolidated
materials are stored, handled or transferred shall be—
(1) Equipped with mechanical devices
or other effective means of handling
materials so that during normal operations persons are not required to
enter or work where they are exposed
to entrapment by the caving or sliding
of materials; and
(2) Equipped with supply and discharge operating controls. The controls
shall be located so that spills or overruns will not endanger persons.
(b) Where persons are required to
move around or over any facility listed
in this standard, suitable walkways or
passageways shall be provided.
(c) Where persons are required to
enter any facility listed in this standard for maintenance or inspection purposes, ladders, platforms, or staging
shall be provided. No person shall enter
the facility until the supply and discharge of materials have ceased and
the supply and discharge equipment is
locked out. Persons entering the facility shall wear a safety belt or harness
equipped with a lifeline suitably fastened. A second person, similarly
equipped, shall be stationed near where
the lifeline is fastened and shall constantly adjust it or keep it tight as
needed, with minimum slack.
§ 56.16004 Containers for hazardous
materials.
Containers holding hazardous materials must be of a type approved for
such use by recognized agencies.
[67 FR 42389, June 21, 2002]
§ 56.16005 Securing gas cylinders.
Compressed and liquid gas cylinders
shall be secured in a safe manner.
§ 56.16006 Protection of gas cylinder
valves.
Valves on compressed gas cylinders
shall be protected by covers when being
transported or stored, and by a safe location when the cylinders are in use.
§ 56.16007 Taglines, hitches, and slings.
(a) Taglines shall be attached to
loads that may require steadying or
guidance while suspended.
(b) Hitches and slings used to hoist
materials shall be suitable for the particular material handled.
§ 56.16009 Suspended loads.
Persons shall stay clear of suspended
loads.
§ 56.16010 Dropping materials from
overhead.
To protect personnel, material shall
not be dropped from an overhead elevation until the drop area is first
cleared of personnel and the area is
then either guarded or a suitable warning is given.
§ 56.16011 Riding hoisted loads or on
the hoist hook.
Persons shall not ride on loads being
moved by cranes or derricks, nor shall
they ride the hoisting hooks unless
such method eliminates a greater hazard.
§ 56.16012 Storage of incompatible substances.
Chemical substances, including concentrated acids and alkalies, shall be
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§ 56.16013
30 CFR Ch. I (7–1–19 Edition)
stored to prevent inadvertent contact
with each other or with other substances, where such contact could
cause a violent reaction or the liberation of harmful fumes or gases.
§ 56.16013
Working with molten metal.
Suitable warning shall be given before molten metal is poured and before
a container of molten metal is moved.
§ 56.16014 Operator-carrying overhead
cranes.
Operator-carrying overhead cranes
shall be provided with—
(a) Bumpers at each end of each rail;
(b) Automatic switches to halt
uptravel of the blocks before they
strike the hoist;
(c) Effective audible warning signals
within easy reach of the operator; and
(d) A means to lock out the disconnect switch.
§ 56.16015 Work or travel on overhead
crane bridges.
No person shall work from or travel
on the bridge of an overhead crane unless the bridge is provided with substantial footwalks with toeboards and
railings the length of the bridge.
§ 56.16016
Lift trucks.
Fork and other similar types of lift
trucks shall be operated with the—
(a) Upright tilted back to steady and
secure the load;
(b) Load in the upgrade position
when ascending or descending grades in
excess of 10 percent;
(c) Load not raised or lowered
enroute except for minor adjustments;
and
(d) Load-engaging device downgrade
when traveling unloaded on all grades.
Subpart P—Illumination
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§ 56.17001 Illumination
working areas.
of
surface
Illumination sufficient to provide
safe working conditions shall be provided in and on all surface structures,
paths, walkways, stairways, switch
panels, loading and dumping sites, and
work areas.
Subpart Q—Safety Programs
§ 56.18002 Examination
places.
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(a) A competent person designated by
the operator shall examine each working place at least once each shift before
work begins or as miners begin work in
that place, for conditions that may adversely affect safety or health.
(1) The operator shall promptly notify miners in any affected areas of any
conditions found that may adversely
affect safety or health and promptly
initiate appropriate action to correct
such conditions.
(2) Conditions noted by the person
conducting the examination that may
present an imminent danger shall be
brought to the immediate attention of
the operator who shall withdraw all
persons from the area affected (except
persons referred to in section 104(c) of
the Federal Mine Safety and Health
Act of 1977) until the danger is abated.
(b) A record of each examination
shall be made before the end of the
shift for which the examination was
conducted. The record shall contain
the name of the person conducting the
examination; date of the examination;
location of all areas examined; and description of each condition found that
may adversely affect the safety or
health of miners and is not corrected
promptly.
(c) When a condition that may adversely affect safety or health is not
corrected promptly, the examination
record shall include, or be supplemented to include, the date of the corrective action.
(d) The operator shall maintain the
examination records for at least one
year, make the records available for inspection by authorized representatives
of the Secretary and the representatives of miners, and provide these representatives a copy on request.
[83 FR 15064, Apr. 9, 2018]
§ 56.18006
New employees.
New employees shall be indoctrinated
in safety rules and safe work procedures.
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Mine Safety and Health Admin., Labor
§ 56.18009 Designation
charge.
of
person
in
When persons are working at the
mine, a competent person designated
by the mine operator shall be in attendance to take charge in case of an
emergency.
§ 56.18010
First aid.
An individual capable of providing
first aid shall be available on all shifts.
The individual shall be currently
trained and have the skills to perform
patient assessment and artificial respiration; control bleeding; and treat
shock, wounds, burns, and musculoskeletal injuries. First aid training
shall be made available to all interested miners.
§ 56.19007
rials, the appropriate standards should
be applied.
(b) Standards 56.19021 through 56.19028
apply to wire ropes in service used to
hoist persons with an incline hoist on
the surface.
(c) Emergency hoisting facilities
should conform to the extent possible
to safety requirements for other hoists,
and should be adequate to remove the
persons from the mine with a minimum
of delay.
HOISTS
§ 56.19001
Rated capacities.
Hoists shall have rated capacities
consistent with the loads handled and
the recommended safety factors of the
ropes used.
[61 FR 50436, Sept. 26, 1996]
§ 56.19002
§ 56.18012
bers.
Emergency telephone num-
Emergency telephone numbers shall
be posted at appropriate telephones.
§ 56.19003
tions.
§ 56.18013 Emergency communications
system.
Belt, rope, or chains shall not be used
to connect driving mechanisms to man
hoists.
A suitable communication system
shall be provided at the mine to obtain
assistance in the event of an emergency.
§ 56.18014 Emergency medical assistance and transportation.
Arrangements shall be made in advance for obtaining emergency medical
assistance and transportation for injured persons.
§ 56.18020
Working alone.
No employee shall be assigned, or allowed, or be required to perform work
alone in any area where hazardous conditions exist that would endanger his
safety unless he can communicate with
others, can be heard, or can be seen.
§ 56.19000
§ 56.19004
Driving mechanism connec-
Brakes.
Any hoist used to hoist persons shall
be equipped with a brake or brakes
which shall be capable of holding its
fully loaded cage, skip, or bucket at
any point in the shaft.
§ 56.19005 Locking
clutch.
mechanism
Application.
(a) The hoisting standards in this
subpart apply to those hoists and appurtenances used for hoising persons.
However, where persons may be endangered by hoists and appurtenances used
solely for handling ore, rock, and mate-
The operating mechanism of the
clutch of every man-hoist drum shall
be provided with a locking mechanism,
or interlocked electrically or mechanically with the brake to prevent accidental withdrawal of the clutch.
§ 56.19006
vices.
Automatic hoist braking de-
§ 56.19007 Overtravel
devices.
and
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All man hoists shall be provided with
devices to prevent overtravel. When
utilized in shafts exceeding 100 feet in
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Automatic hoists shall be provided
with devices that automatically apply
the brakes in the event of power failure.
Subpart R—Personnel Hoisting
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Anchoring.
Hoists shall be anchored securely.
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§ 56.19008
30 CFR Ch. I (7–1–19 Edition)
depth, such hoists shall also be provided with overspeed devices.
§ 56.19008 Friction hoist synchronizing
mechanisms.
Where creep or slip may alter the effective position of safety devices, friction hoists shall be equipped with synchronizing mechanisms that recalibrate the overtravel devices and position indicators.
§ 56.19009 Position indicator.
An accurate and reliable indicator of
the position of the cage, skip, bucket,
or cars in the shaft shall be provided.
§ 56.19010 Location of hoist controls.
Hoist controls shall be placed or
housed so that the noise from machinery or other sources will not prevent
hoistmen from hearing signals.
§ 56.19011 Drum flanges.
Flanges on drums shall extend radially a minimum of 4 inches or three
rope diameters beyond the last wrap,
whichever is the lesser.
§ 56.19012 Grooved drums.
Where grooved drums are used, the
grooves shall be of suitable size and
pitch for the ropes used.
§ 56.19013 Diesel- and other fuel-injection-powered hoists.
Where any diesel or similar fuel-injection engine is used to power a hoist,
the engine shall be equipped with a
damper or other cutoff in its air intake
system. The control handle shall be
clearly labeled to indicate that its intended function is for emergency stopping only.
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§ 56.19014 Friction hoist overtravel
protection.
In a friction hoist installation, tapered guides or other approved devices
shall be installed above and below the
limits of regular travel of the conveyance and arranged to prevent overtravel in the event of failure of other
devices.
§ 56.19017 Emergency braking for electric hoists.
Each electric hoist shall be equipped
with a manually-operable switch that
will initiate emergency braking action
to bring the conveyance and the counterbalance safely to rest. This switch
shall be located within reach of the
hoistman in case the manual controls
of the hoist fail.
§ 56.19018
Overtravel by-pass switches.
When an overtravel by-pass switch is
installed, the switch shall function so
as to allow the conveyance to be moved
through the overtravel position when
the switch is held in the closed position
by the hoistman. The overtravel bypass switch shall return automatically
to the open position when released by
the hoistman.
[50 FR 4054, Jan. 29, 1985; 50 FR 20100, May 14,
1985]
WIRE ROPES
AUTHORITY: Sec. 101, Federal Mine Safety
and Health Act of 1977, Pub. L. 91–173 as
amended by Pub. L. 95–164, 91 Stat. 1291 (30
U.S.C. 811).
§ 56.19021
Minimum rope strength.
At installation, the nominal strength
(manufacturer’s
published
catalog
strength) of wire ropes used for hoisting shall meet the minimum rope
strength values obtained by the following formulas in which ‘‘L’’ equals
the maximum suspended rope length in
feet:
(a) Winding drum ropes (all constructions, including rotation resistant).
For rope lengths less than 3,000 feet:
Minimum Value = Static
Load × (7.0–0.001L)
For rope lengths 3,000 feet or greater:
Minimum Value = Static Load × 4.0
(b) Friction drum ropes.
For rope lengths less than 4,000 feet:
Minimum Value = Static
Load × (7.0–0.0005L)
For rope lengths 4,000 feet or greater:
Minimum Value = Static Load × 5.0
(c) Tail ropes (balance ropes).
Minimum Value = Weight of Rope × 7.0
§ 56.19022
Initial measurement.
After initial rope stretch but before
visible wear occurs, the rope diameter
of newly installed wire ropes shall be
measured at least once in every third
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Mine Safety and Health Admin., Labor
§ 56.19026
interval of active length and the measurements averaged to establish a baseline for subsequent measurements. A
record of the measurements and the
date shall be made by the person taking the measurements. This record
shall be retained until the rope is retired from service.
(e) The person making the measurements or nondestructive tests as required by paragraph (c) of this section
shall record the measurements or test
results and the date. This record shall
be retained until the rope is retired
from service.
[50 FR 4054, Jan. 29, 1985, as amended at 60
FR 33723, June 29, 1995]
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§ 56.19023
Examinations.
(a) At least once every fourteen calendar days, each wire rope in service
shall be visually examined along its entire active length for visible structural
damage, corrosion, and improper lubrication or dressing. In addition, visual
examination for wear and broken wires
shall be made at stress points, including the area near attachments, where
the rope rests on sheaves, where the
rope leaves the drum, at drum crossovers, and at change-of-layer regions.
When any visible condition that results
in a reduction of rope strength is
present, the affected portion of the
rope shall be examined on a daily basis.
(b) Before any person is hoisted with
a newly installed wire rope or any wire
rope that has not been examined in the
previous fourteen calendar days, the
wire rope shall be examined in accordance with paragraph (a) of this section.
(c) At least once every six months,
nondestructive tests shall be conducted
of the active length of the rope, or rope
diameter
measurements
shall
be
made—
(1) Wherever wear is evident;
(2) Where the hoist rope rests on
sheaves at regular stopping points;
(3) Where the hoist rope leaves the
drum at regular stopping points; and
(4) At drum crossover and change-oflayer regions.
(d) At the completion of each examination required by paragraph (a) of
this section, the person making the examination shall certify, by signature
and date, that the examination has
been made. If any condition listed in
paragraph (a) of this section is present,
the person conducting the examination
shall make a record of the condition
and the date. Certifications and records
of examinations shall be retained for
one year.
[50 FR 4054, Jan. 29, 1985, as amended at 60
FR 33723, June 29, 1995]
§ 56.19024 Retirement criteria.
Unless damage or deterioration is removed by cutoff, wire ropes shall be removed from service when any of the
following conditions occurs:
(a) The number of broken wires within a rope lay length, excluding filler
wires, exceeds either—
(1) Five percent of the total number
of wires; or
(2) Fifteen percent of the total number of wires within any strand.
(b) On a regular lay rope, more than
one broken wire in the valley between
strands in one rope lay length.
(c) A loss of more than one-third of
the original diameter of the outer
wires.
(d) Rope deterioriation from corrosion.
(e) Distortion of the rope structure.
(f) Heat damage from any source.
(g) Diameter reduction due to wear
that exceeds six percent of the baseline
diameter measurement.
(h) Loss of more than ten percent of
rope strength as determined by nondestructive testing.
§ 56.19025 Load end attachments.
(a) Wire rope shall be attached to the
load by a method that develops at least
80 percent of the nominal strength of
the rope.
(b) Except for terminations where use
of other materials is a design feature,
zinc (spelter) shall be used for
socketing wire ropes. Design feature
means either the manufacturer’s original design or a design approved by a
registered professional engineer.
(c) Load end attachment methods
using splices are prohibited.
§ 56.19026 Drum end attachment.
(a) For drum end attachment, wire
rope shall be attached—
(1) Securely by clips after making
one full turn around the drum spoke;
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§ 56.19027
30 CFR Ch. I (7–1–19 Edition)
(2) Securely by clips after making
one full turn around the shaft, if the
drum is fixed to the shaft; or
(3) By properly assembled anchor
bolts, clamps, or wedges, provided that
the attachment is a design feature of
the hoist drum. Design feature means
either the manufacturer’s original design or a design approved by a registered professional engineer.
(b) A minimum of three full turns of
wire rope shall be on the drum when
the rope is extended to its maximum
working length.
§ 56.19027 End attachment retermination.
Damaged or deteriorated wire rope
shall be removed by cutoff and the rope
reterminated where there is—
(a) More than one broken wire at an
attachment;
(b) Improper installation of an attachment;
(c) Slippage at an attachment; or
(d) Evidence of deterioration from
corrosion at an attachment.
or
two
for
§ 56.19038 Platforms around elevated
head sheaves.
Platforms with toeboards and handrails shall be provided around elevated
head sheaves.
CONVEYANCES
§ 56.19045 Metal bonnets.
Man cages and skips used for hoisting
or lowering employees or other persons
in any vertical shaft or any inclineshaft with an angle of inclination of
forty-five degrees from the horizontal,
shall be covered with a metal bonnet.
§ 56.19049 Hoisting persons in buckets.
Buckets shall not be used to hoist
persons except during shaft sinking operations, inspection, maintenance, and
repairs.
HEADFRAMES AND SHEAVES
§ 56.19035 Headframe design.
All headframes shall be constructed
with suitable design considerations to
allow for all dead loads, live loads, and
wind loads.
§ 56.19054 Rope guides.
Where rope guides are used in shafts
other than in shaft sinking operations,
the rope guides shall be a type of lock
coil construction.
§ 56.19036 Headframe height.
Headframes shall be high enough to
provide clearance for overtravel and
safe stopping of the conveyance.
HOISTING PROCEDURES
§ 56.19030 Safety device attachments.
Safety device attachments to hoist
ropes shall be selected, installed, and
maintained according to manufacturers’ specifications to minimize internal
corrosion and weakening of the hoist
rope.
§ 56.19037 Fleet angles.
Fleet angles on hoists installed after
November 15, 1979, shall not be greater
than one and one-half degrees for
§ 56.19055 Availability of hoist operator for manual hoists.
When a manually operated hoist is
used, a qualified hoistman shall remain
within hearing of the telephone or signal device at all times while any person is underground.
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§ 56.19050 Bucket requirements.
Buckets used to hoist persons during
vertical
shaft
sinking
operations
shall—
(a) Be securely attached to a crosshead when traveling in either direction
between the lower and upper crosshead
parking locations;
(b) Have overhead protection when
the shaft depth exceeds 50 feet;
(c) Have sufficient depth or a suitably designed platform to transport
persons safely in a standing position;
and
(d) Have devices to prevent accidental dumping where the bucket is
supported by a bail attached to its
lower half.
§ 56.19028 End attachment replacement.
Wire rope attachments shall be replaced when cracked, deformed, or excessively worn.
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grooved drums.
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§ 56.19073
§ 56.19056 Availability of hoist operator for automatic hoists.
When automatic hoisting is used, a
competent operator of the hoist shall
be readily available at or near the
hoisting device while any person is underground.
mitted to ride in a hoisting conveyance
at any one time. Each person shall be
provided a minimum of 1.5 square feet
of floor space.
§ 56.19057 Hoist operator’s physical fitness.
No person shall operate a hoist unless within the preceding 12 months he
has had a medical examination by a
qualified, licensed physician who shall
certify his fitness to perform this duty.
Such certification shall be available at
the mine.
Trips during shift changes.
During shift changes, an authorized
person shall be in charge of each trip in
which persons are hoisted.
§ 56.19068 Orderly conduct in conveyances.
Persons shall enter, ride, and leave
conveyances in an orderly manner.
§ 56.19069 Entering and leaving conveyances.
§ 56.19058 Experienced hoist operators.
Only experienced hoistmen shall operate the hoist except in cases of emergency and in the training of new
hoistmen.
Persons shall not enter or leave conveyances which are in motion or after
a signal to move the conveyance has
been given to the hoistman.
§ 56.19061 Maximum hoisting speeds.
The safe speed for hoisting persons
shall be determined for each shaft, and
this speed shall not be exceeded. Persons should not be hoisted at a speed
faster than 2,500 feet per minute, except in an emergency.
Cage doors or gates shall be closed
while persons are being hoisted; they
shall not be opened until the cage has
come to a stop.
§ 56.19062 Maximum acceleration and
deceleration.
Maximum normal operating acceleration and deceleration shall not exceed 6
feet per second per second. During
emergency braking, the deceleration
shall not exceed 16 feet per second per
second.
§ 56.19063 Persons allowed in hoist
room.
Only authorized persons shall be in
hoist rooms.
§ 56.19065 Lowering conveyances by
the brakes.
Conveyances shall not be lowered by
the brakes alone except during emergencies.
kpayne on VMOFRWIN702 with $$_JOB
§ 56.19067
§ 56.19066 Maximum riders in a conveyance.
In shafts inclined over 45 degrees, the
operator shall determine and post in
the conveyance or at each shaft station
the maximum number of persons per-
§ 56.19070
§ 56.19071
Closing cage doors or gates.
Riding in skips or buckets.
Persons shall not ride in skips or
buckets with muck, supplies, materials, or tools other than small hand
tools.
§ 56.19072 Skips and cages in same
compartment.
When combinations of cages and
skips are used in the same compartment, the cages shall be enclosed to
protect personnel from flying material
and the hoist speed reduced to manspeed as defined in standard 56.19061,
but not to exceed 1,000 feet per minute.
Muck shall not be hoisted with personnel during shift changes.
§ 56.19073 Hoisting
changes.
during
Rock or supplies shall not be hoisted
in the same shaft as persons during
shift changes, unless the compartments
and dumping bins are partitioned to
prevent spillage into the cage compartment.
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§ 56.19074
30 CFR Ch. I (7–1–19 Edition)
§ 56.19074 Riding the bail, rim, bonnet,
or crosshead.
Persons shall not ride the bail, rim,
bonnet, or crosshead of any shaft conveyance except when necessary for inspection and maintenance, and then
only when suitable protection for persons is provided.
§ 56.19081
§ 56.19083
§ 56.19075
Use of open hooks.
Open hooks shall not be used to hoist
buckets or other conveyances.
§ 56.19076 Maximum speeds for hoisting persons in buckets.
When persons are hoisted in buckets,
speeds shall not exceed 500 feet per
minute and shall not exceed 200 feet
per minute when within 100 feet of the
intended station.
§ 56.19077
§ 56.19078 Hoisting buckets from the
shaft bottom.
All buckets shall be stopped after
being raised about 3 feet above the
shaft bottom. A bucket shall be stabilized before a hoisting signal is given
to continue hoisting the bucket to the
crosshead. After a hoisting signal is
given, hoisting to the crosshead shall
be at a minimum speed. The signaling
device shall be attended constantly
until a bucket reaches the guides.
When persons are hoisted, the signaling
devices shall be attended until the
crosshead has been engaged.
§ 56.19079
Blocking mine cars.
Where mine cars are hoisted by cage
or skip, means for blocking cars shall
be provided at all landings and also on
the cage.
kpayne on VMOFRWIN702 with $$_JOB
§ 56.19080 Hoisting tools, timbers, and
other materials.
When tools, timbers, or other materials are being lowered or raised in a
shaft by means of a bucket, skip, or
cage, they shall be secured or so placed
that they will not strike the sides of
the shaft.
Overtravel backout device.
A manually operated device shall be
installed on each electric hoist that
will allow the conveyance or counterbalance to be removed from an overtravel position. Such device shall not
release the brake, or brakes, holding
the overtravelled conveyance or counterbalance until sufficient drive motor
torque has been developed to assure
movement of the conveyance or counterbalance in the correct direction
only.
Lowering buckets.
Buckets shall be stopped about 15
feet from the shaft bottom to await a
signal from one of the crew on the bottom for further lowering.
Conveyances not in use.
When conveyances controlled by a
hoist operator are not in use, they
shall be released and the conveyances
shall be raised or lowered a suitable
distance to prevent persons from
boarding or loading the conveyances.
SIGNALING
§ 56.19090
Dual signaling systems.
There shall be at least two effective
approved methods of signaling between
each of the shaft stations and the hoist
room, one of which shall be a telephone
or speaking tube.
§ 56.19091 Signaling
hoist operator.
instructions
Hoist operators shall accept hoisting
instructions only by the regular signaling system unless it is out of order.
In such an event, and during other
emergencies, the hoist operator shall
accept instructions to direct movement
of the conveyances only from authorized persons.
§ 56.19092
Signaling from conveyances.
A method shall be provided to signal
the hoist operator from cages or other
conveyances at any point in the shaft.
§ 56.19093
Standard signal code.
A standard code of hoisting signals
shall be adopted and used at each mine.
The movement of a shaft conveyance
on a ‘‘one bell’’ signal is prohibited.
§ 56.19094
Posting signal code.
A legible signal code shall be posted
prominently in the hoist house within
easy view of the hoistman, and at each
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Mine Safety and Health Admin., Labor
place where signals are given or received.
§ 56.19095
Location of signal devices.
Hoisting signal devices shall be positioned within easy reach of persons on
the shaft bottom or constantly attended by a person stationed on the
lower deck of the sinking platform.
§ 56.19096
code.
Familiarity
with
signal
Any person responsible for receiving
or giving signals for cages, skips, and
mantrips when persons or materials
are being transported shall be familiar
with the posted signaling code.
SHAFTS
§ 56.19100
Shaft landing gates.
Shaft landings shall be equipped with
substantial safety gates so constructed
that materials will not go through or
under them; gates shall be closed except when loading or unloading shaft
conveyances.
§ 56.19101 Stopblocks
switches.
and
derail
Positive stopblocks or a derail switch
shall be installed on all tracks leading
to a shaft collar or landing.
§ 56.19102
§ 56.19103 Dumping facilities and loading pockets.
Dumping facilities and loading pockets shall be constructed so as to minimize spillage into the shaft.
Clearance at shaft stations.
Suitable clearance at shaft stations
shall be provided to allow safe movement of persons, equipment, and materials.
§ 56.19105 Landings with more than
one shaft entrance.
kpayne on VMOFRWIN702 with $$_JOB
§ 56.19106
A safe means of passage around open
shaft compartments shall be provided
on landings with more than one entrance to the shaft.
Shaft sets.
Shaft sets shall be kept in good repair and clean of hazardous material.
§ 56.19107 Precautions for work in
compartment affected by hoisting
operation.
Hoistmen shall be informed when
persons are working in a compartment
affected by that hoisting operation and
a ‘‘Men Working in Shaft’’ sign shall be
posted at the hoist.
§ 56.19108 Posting warning signs during shaft work.
When persons are working in a shaft
‘‘Men Working in Shaft’’ signs shall be
posted at all devices controlling hoisting operations that may endanger such
persons.
§ 56.19109
Shaft inspection and repair.
Shaft inspection and repair work in
vertical shafts shall be performed from
substantial platforms equipped with
bonnets or equivalent overhead protection.
§ 56.19110 Overhead
protection
shaft deepening work.
Shaft-sinking ladders.
Substantial fixed ladders shall be
provided from the collar to as near the
shaft bottom as practical during shaftsinking operations, or an escape hoist
powered by an emergency power source
shall be provided. When persons are on
the shaft bottom, a chain ladder, wire
rope ladder, or other extension ladders
shall be used from the fixed ladder or
lower limit of the escape hoist to the
shaft bottom.
INSPECTION AND MAINTENANCE
§ 56.19120 Procedures for inspection,
testing, and maintenance.
A systematic procedure of inspection,
testing, and maintenance of shafts and
hoisting equipment shall be developed
and followed. If it is found or suspected
that any part is not functioning properly, the hoist shall not be used until
the malfunction has been located and
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A substantial bulkhead or equivalent
protection shall be provided above persons at work deepening a shaft.
§ 56.19111
Shaft guides.
A means shall be provided to guide
the movement of a shaft conveyance.
§ 56.19104
§ 56.19120
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§ 56.19121
repaired
made.
§ 56.19121
30 CFR Ch. I (7–1–19 Edition)
or
adjustments
have
been
Recordkeeping.
At the time of completion, the person
performing inspections, tests, and
maintenance of hoisting equipment required in standard 56.19120 shall certify, by signature and date, that they
have been done. A record of any part
that is not functioning properly shall
be made and dated. Certifications and
records shall be retained for one year.
(Sec. 101, Pub. L. 91–173 as amended by Pub.
L. 95–164, 91 Stat. 1291 (30 U.S.C. 811))
[50 FR 4054, Jan. 29, 1985, as amended at 60
FR 33723, June 29, 1995]
§ 56.19122
Replacement parts.
Parts used to repair hoists shall have
properties that will ensure the proper
and safe function of the hoist.
§ 56.19129 Examinations and tests at
beginning of shift.
Hoistmen shall examine their hoists
and shall test overtravel, deadman controls, position indicators, and braking
mechanisms at the beginning of each
shift.
§ 56.19130
Conveyance shaft test.
Before hoisting persons and to assure
that the hoisting compartments are
clear of obstructions, empty hoist conveyances shall be operated at least one
round trip after:
(a) Any hoist or shaft repairs or related equipment repairs that might restrict or obstruct conveyance clearance;
(b) Any oversize or overweight material or equipment trips that might restrict or obstruct conveyance clearance;
(c) Blasting in or near the shaft that
might restrict or obstruct conveyance
clearance; or
(d) Remaining idle for one shift or
longer.
kpayne on VMOFRWIN702 with $$_JOB
§ 56.19131
tions.
Hoist
conveyance
connec-
Hoist conveyance connections shall
be inspected at least once during any
24-hour period that the conveyance is
used for hoisting persons.
§ 56.19132 Safety catches.
(a) A performance drop test of hoist
conveyance safety catches shall be
made at the time of installation, or
prior to installation, in a mockup of
the actual installation. The test shall
be certified to in writing by the manufacturer or by a registered professional
engineer performing the test.
(b) After installation and before use,
and at the beginning of any seven day
period during which the conveyance is
to be used, the conveyance shall be
suitably rested and the hoist rope
slackened to test for the unrestricted
functioning of the safety catches and
their activating mechanisms.
(c) The safety catches shall be inspected by a competent person at the
beginning of any 24-hour period that
the conveyance is to be used.
§ 56.19133 Shaft.
Shafts that have not been inspected
within the past 7 days shall not be used
until an inspection has been conducted
by a competent person.
§ 56.19134 Sheaves.
Sheaves in operating shafts shall be
inspected weekly and kept properly lubricated.
§ 56.19135 Rollers in inclined shafts.
Rollers used in operating inclined
shafts shall be lubricated, properly
aligned, and kept in good repair.
Subpart S—Miscellaneous
§ 56.20001 Intoxicating beverages and
narcotics.
Intoxicating beverages and narcotics
shall not be permitted or used in or
around mines. Persons under the influence of alcohol or narcotics shall not
be permitted on the job.
§ 56.20002 Potable water.
(a) An adequate supply of potable
drinking water shall be provided at all
active working areas.
(b) The common drinking cup and
containers from which drinking water
must be dipped or poured are prohibited.
(c) Where single service cups are supplied, a sanitary container for unused
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Mine Safety and Health Admin., Labor
Pt. 57
cups and a receptable for used cups
shall be provided.
(d) When water is cooled by ice, the
ice shall either be of potable water or
shall not come in contact with the
water.
(e) Potable water outlets shall be
posted.
(f) Potable water systems shall be
constructed to prevent backflow or
backsiphonage of non-potable water.
§ 56.20011 Barricades
and
warning
signs.
Areas where health or safety hazards
exist that are not immediately obvious
to employees shall be barricaded, or
warning signs shall be posted at all approaches. Warning signs shall be readily visible, legible, and display the nature of the hazard and any protective
action required.
§ 56.20003
Housekeeping.
At all mining operations—
(a) Workplaces, passageways, storerooms, and service rooms shall be kept
clean and orderly;
(b) The floor of every workplace shall
be maintained in a clean and, so far as
possible, dry condition. Where wet
processes are used, drainage shall be
maintained, and false floors, platforms,
mats, or other dry standing places
shall be provided where practicable;
and
(c) Every floor, working place, and
passageway shall be kept free from protruding nails, splinters, holes, or loose
boards, as practicable.
§ 56.20005
kpayne on VMOFRWIN702 with $$_JOB
PART 57—SAFETY AND HEALTH
STANDARDS—UNDERGROUND
METAL AND NONMETAL MINES
Subpart A—General
Sec.
57.1 Purpose and scope.
57.2 Definitions.
Toilet facilities.
(a) Toilet facilities shall be provided
at locations that are compatible with
the mine operations and that are readily accessible to mine personnel.
(b) The facilities shall be kept clean
and sanitary. Separate toilet facilities
shall be provided for each sex except
where toilet rooms will be occupied by
no more than one person at a time and
can be locked from the inside.
§ 56.20009
§ 56.20014 Prohibited areas for food
and beverages.
No person shall be allowed to consume or store food or beverages in a
toilet room or in any area exposed to a
toxic material.
Carbon tetrachloride.
Carbon tetrachloride shall not be
used.
§ 56.20008
§ 56.20013 Waste receptacles.
Receptacles with covers shall be provided at suitable locations and used for
the disposal of waste food and associated materials. They shall be emptied
frequently and shall be maintained in a
clean and sanitary condition.
Tests for explosive dusts.
PROCEDURES
57.1000 Notification of commencement of
operations and closing of mines.
Subpart B—Ground Control
57.3000
SCALING AND SUPPORT—SURFACE AND
UNDERGROUND
57.3200
57.3201
57.3202
57.3203
Dusts suspected of being explosive
shall be tested for explosibility. If tests
prove positive, appropriate control
measures shall be taken.
57.3360
§ 56.20010
57.3400
57.3401
Retaining dams.
If failure of a water or silt retaining
dam will create a hazard, it shall be of
substantial construction and inspected
at regular intervals.
Definitions.
Correction of hazardous conditions.
Location for performing scaling.
Scaling tools.
Rock fixtures.
SCALING AND SUPPORT—UNDERGROUND ONLY
Ground support use.
PRECAUTIONS—SURFACE AND UNDERGROUND
Secondary breakage.
Examination of ground conditions.
PRECAUTIONS—SURFACE ONLY
57.3430 Activity between machinery
equipment and the highwall or bank.
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or
Pt. 57
30 CFR Ch. I (7–1–19 Edition)
PRECAUTIONS—UNDERGROUND ONLY
57.3460 Maintenance between machinery or
equipment and ribs.
57.3461 Rock bursts.
Subpart C—Fire Prevention and Control
57.4000
57.4011
57.4057
Definitions.
Abandoned electric circuits.
Underground trailing cables.
PROHIBITIONS/PRECAUTIONS/HOUSEKEEPING
57.4100 Smoking and use of open flames.
57.4101 Warning signs.
57.4102 Spillage and leakage.
57.4103 Fueling internal combustion engines.
57.4104 Combustible waste.
57.4130 Surface electric substations and liquid storage facilities.
57.4131 Surface fan installations and mine
openings.
57.4160 Underground electric substations
and liquid storage facilities.
57.4161 Use of fire underground.
FIREFIGHTING EQUIPMENT
57.4200 General requirements.
57.4201 Inspection.
57.4202 Fire hydrants.
57.4203 Extinguisher recharging or replacement.
57.4230 Surface self-propelled equipment.
57.4260 Underground self-propelled equipment.
57.4261 Shaft-station waterlines.
57.4262 Underground transformer stations,
combustible liquid storage and dispensing areas, pump rooms, compressor
rooms, and hoist rooms.
57.4263 Underground belt conveyors.
FIREFIGHTING PROCEDURES/ALARMS/DRILLS
57.4330 Surface firefighting, evacuation, and
rescue procedures.
57.4331 Surface firefighting drills.
57.4360 Underground alarm systems.
57.4361 Underground evacuation drills.
57.4362 Underground rescue and firefighting
operations.
57.4363 Underground evacuation instruction.
kpayne on VMOFRWIN702 with $$_JOB
FLAMMABLE AND COMBUSTIBLE LIQUIDS AND
GASES
57.4463 Liquefied petroleum gas use underground.
INSTALLATION/CONSTRUCTION/MAINTENANCE
57.4500 Heat sources.
57.4501 Fuel lines.
57.4502 Battery-charging stations.
57.4503 Conveyor belt slippage.
57.4504 Fan installations.
57.4505 Fuel lines to underground areas.
57.4530 Exits for surface buildings and structures.
57.4531 Surface flammable or combustible
liquid storage buildings or rooms.
57.4532 Blacksmith shops.
57.4533 Mine opening vicinity.
57.4560 Mine entrances.
57.4561 Stationary diesel equipment underground.
WELDING/CUTTING/COMPRESSED GASES
57.4600 Extinguishing equipment.
57.4601 Oxygen cylinder storage.
57.4602 Gauges and regulators.
57.4603 Closure of valves.
57.4604 Preparation of pipelines or containers.
57.4660 Work in shafts, raises, or winzes and
other activities involving hazard areas.
VENTILATION CONTROL MEASURES
57.4760 Shaft mines.
57.4761 Underground shops.
APPENDIX I TO SUBPART C OF PART 57—NATIONAL CONSENSUS STANDARDS
Subpart D—Air Quality, Radiation, Physical
Agents, and Diesel Particulate Matter
AIR QUALITY—SURFACE AND UNDERGROUND
57.5001 Exposure limits for airborne contaminants.
57.5002 Exposure monitoring.
57.5005 Control of exposure to airborne contaminants.
57.5006 Restricted use of chemicals.
AIR QUALITY—SURFACE ONLY [RESERVED]
AIR QUALITY—UNDERGROUND ONLY
57.5015
Oxygen deficiency.
RADIATION—UNDERGROUND ONLY
57.4400 Use restrictions.
57.4401 Storage tank foundations.
57.4402 Safety can use.
57.4430 Surface storage facilities.
57.4431 Surface storage restrictions.
57.4460 Storage of flammable liquids underground.
57.4461 Gasoline use restrictions underground.
57.4462 Storage of combustible liquids underground.
57.5037 Radon daughter exposure monitoring.
57.5038 Annual exposure limits.
57.5039 Maximum permissible concentration.
57.5040 Exposure records.
57.5041 Smoking prohibition.
57.5042 Revised exposure levels.
57.5044 Respirators.
57.5045 Posting of inactive workings.
57.5046 Protection against radon gas.
57.5047 Gamma radiation surveys.
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Mine Safety and Health Admin., Labor
Pt. 57
DIESEL PARTICULATE MATTER—UNDERGROUND
ONLY
57.6402 Deenergized circuits near detonators.
57.6403 Branch circuits.
57.6404 Separation of blasting circuits from
power source.
57.6405 Firing devices.
57.6406 Duration of current flow.
57.6407 Circuit testing.
57.5060 Limit on exposure to diesel particulate matter.
57.5061 Compliance determinations.
57.5065 Fueling practices.
57.5066 Maintenance standards.
57.5067 Engines.
57.5070 Miner training.
57.5071 Exposure monitoring.
57.5075 Diesel particulate records.
57.6500
57.6501
57.6502
Subpart E—Explosives
57.6000
NONELECTRIC BLASTING—SURFACE AND
UNDERGROUND
Definitions.
Damaged initiating material.
Nonelectric initiation systems.
Safety fuse.
EXTRANEOUS ELECTRICITY—SURFACE AND
UNDERGROUND
STORAGE—SURFACE AND UNDERGROUND
57.6100 Separation of stored explosive material.
57.6101 Areas around explosive material
storage facilities.
57.6102 Explosive material storage practices.
57.6600 Loading practices.
57.6601 Grounding.
57.6602 Static electricity dissipation during
loading.
57.6603 Air gap.
57.6604 Precautions during storms.
57.6605 Isolation of blasting circuits.
STORAGE—SURFACE ONLY
57.6130
57.6131
age
57.6132
57.6133
Explosive material storage facilities.
Location of explosive material storfacilities.
Magazine requirements.
Powder chests.
EQUIPMENT/TOOLS—SURFACE AND
UNDERGROUND
57.6700 Nonsparking tools.
57.6701 Tamping and loading pole requirements.
MAINTENANCE—SURFACE AND UNDERGROUND
STORAGE—UNDERGROUND ONLY
57.6160
57.6161
57.6800
57.6801
57.6802
57.6803
Main facilities.
Auxiliary facilities.
TRANSPORTATION—SURFACE AND
UNDERGROUND
57.6200 Delivery to storage or blast site
areas.
57.6201 Separation of transported explosive
material.
57.6202 Vehicles.
57.6203 Locomotives.
57.6204 Hoists.
57.6205 Conveying explosives by hand.
USE—SURFACE AND UNDERGOUND
kpayne on VMOFRWIN702 with $$_JOB
GENERAL REQUIREMENTS—SURFACE AND
UNDERGROUND
57.6900 Damaged or deteriorated explosive
material.
57.6901 Black powder.
57.6902 Excessive temperatures.
57.6903 Burning explosive material.
57.6904 Smoking and open flames.
57.6905 Protection of explosive material.
GENERAL REQUIREMENTS—UNDERGROUND
ONLY
57.6300 Control of blasting operations.
57.6301 Blasthole obstruction check.
57.6302 Separation of explosive material.
57.6303 Initiation preparation.
57.6304 Primer protection.
57.6305 Unused explosive material.
57.6306 Loading, blasting, and security.
57.6307 Drill stem loading.
57.6308 Initiation systems.
57.6309 Fuel oil requirements for ANFO.
57.6310 Misfire waiting period.
57.6311 Handling of misfires.
57.6312 Secondary blasting.
57.6960
Mixing of explosive material.
Subpart F—Drilling and Rotary Jet Piercing
DRILLING—SURFACE ONLY
ELECTRIC BLASTING—SURFACE AND
UNDERGROUND
57.6400
57.6401
Storage facilities.
Vehicle repair.
Bulk delivery vehicles.
Blasting lines.
Compatibility of electric detonators.
Shunting.
57.7002
57.7003
57.7004
57.7005
57.7008
57.7009
57.7010
57.7011
57.7012
57.7013
57.7018
Equipment defects.
Drill area inspection.
Drill mast.
Augers and drill stems.
Moving the drill.
Drill helpers.
Power failures.
Straightening crossed cables.
Tending drills in operation.
Covering or guarding drill holes.
Hand clearance.
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Pt. 57
30 CFR Ch. I (7–1–19 Edition)
DRILLING—UNDERGROUND ONLY
57.7028
57.7032
57.9261 Transporting tools and materials on
locomotives.
Hand clearance.
Anchoring.
SAFETY DEVICES, PROVISIONS, AND PROCEDURES FOR ROADWAYS, RAILROADS, AND
LOADING AND DUMPING SITES
DRILLING—SURFACE AND UNDERGROUND
57.7050 Tool and drill steel racks.
57.7051 Loose objects on the mast or drill
platform.
57.7052 Drilling positions.
57.7053 Moving hand-held drills.
57.7054 Starting or moving drill equipment.
57.7055 Intersecting holes.
57.7056 Collaring in bootlegs.
ROTARY JET PIERCING—SURFACE ONLY
57.7801 Jet drills.
57.7802 Oxygen hose lines.
57.7803 Lighting the burner.
57.7804 Refueling.
57.7805 Smoking and open flames.
57.7806 Oxygen intake coupling.
57.7807 Flushing the combustion chamber.
Subpart G—Ventilation
SURFACE AND UNDERGROUND
57.8518
57.8519
Main and booster fans.
Underground main fan controls.
UNDERGROUND ONLY
57.8520 Ventilation plan.
57.8525 Main fan maintenance.
57.8527 Oxygen-deficiency testing.
57.8528 Unventilated areas.
57.8529 Auxiliary fan systems.
57.8531 Construction and maintenance of
ventilation doors.
57.8532 Opening and closing ventilation
doors.
57.8534 Shutdown or failure of auxiliary
fans.
57.8535 Seals.
Subpart H—Loading, Hauling, and
Dumping
TRAFFIC SAFETY
57.9100 Traffic control.
57.9101 Operating speeds and control of
equipment.
57.9102 Movement of independently operating rail equipment.
57.9103 Clearance on adjacent tracks.
57.9104 Railroad crossings.
57.9160 Train
movement
during
shift
changes.
kpayne on VMOFRWIN702 with $$_JOB
TRANSPORTATION OF PERSONS AND MATERIALS
57.9200 Transporting persons.
57.9201 Loading, hauling, and unloading of
equipment or supplies.
57.9202 Loading and hauling large rocks.
57.9260 Supplies, materials, and tools on
mantrips.
57.9300 Berms or guardrails.
57.9301 Dump site restraints.
57.9302 Protection against moving or runaway railroad equipment.
57.9303 Construction of ramps and dumping
facilities.
57.9304 Unstable ground.
57.9305 Truck spotters.
57.9306 Warning devices for restricted clearances.
57.9307 Design, installation, and maintenance of railroads.
57.9308 Switch throws.
57.9309 Chute design.
57.9310 Chute hazards.
57.9311 Anchoring stationary sizing devices.
57.9312 Working around drawholes.
57.9313 Roadway maintenance.
57.9314 Trimming stockpile and muckpile
faces.
57.9315 Dust control.
57.9316 Notifying the equipment operator.
57.9317 Suspended loads.
57.9318 Getting on or off moving equipment.
57.9319 Going over, under, or between railcars.
57.9330 Clearance for surface equipment.
57.9360 Shelter holes.
57.9361 Drawholes.
57.9362 Protection of signalmen.
Subpart I—Aerial Tramways
57.10001 Filling buckets.
57.10002 Inspection and maintenance.
57.10003 Correction of defects.
57.10004 Brakes.
57.10005 Track cable connections.
57.10006 Tower guards.
57.10007 Falling object protection.
57.10008 Riding tramways.
57.10009 Riding loaded buckets.
57.10010 Starting precautions.
Subpart J—Travelways and Escapeways
TRAVELWAYS—SURFACE AND UNDERGROUND
57.11001 Safe access.
57.11002 Handrails and toeboards.
57.11003 Construction and maintenance of
ladders.
57.11004 Portable rigid ladders.
57.11005 Fixed ladder anchorage and toe
clearance.
57.11006 Fixed ladder landings.
57.11007 Wooden components of ladders.
57.11008 Restricted clearance.
57.11009 Walkways along conveyors.
57.11010 Stairstep clearance.
57.11011 Use of ladders.
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Mine Safety and Health Admin., Labor
Pt. 57
57.11012 Protection for openings around
travelways.
57.11013 Conveyor crossovers.
57.11014 Crossing moving conveyors.
57.11016 Snow and ice on walkways and
travelways.
57.11017 Inclined fixed ladders.
57.12022 Authorized persons at major electrical installations.
57.12023 Guarding electrical connections and
resistor grids.
57.12025 Grounding circuit enclosures.
57.12026 Grounding
transformer
and
switchgear enclosures.
57.12027 Grounding mobile equipment.
57.12028 Testing grounding systems.
57.12030 Correction of dangerous conditions.
57.12032 Inspection and cover plates.
57.12033 Hand-held electric tools.
57.12034 Guarding around lights.
57.12035 Weatherproof lamp sockets.
57.12036 Fuse removal or replacement.
57.12037 Fuses in high-potential circuits.
57.12038 Attachment of trailing cables.
57.12039 Protection of surplus trailing cables.
57.12040 Installation of operating controls.
57.12041 Design of switches and starting
boxes.
57.12042 Track bonding.
57.12045 Overhead powerlines.
57.12047 Guy wires.
57.12048 Communication
conductors
on
power poles.
57.12050 Installation of trolley wires.
57.12053 Circuits powered from trolley wires.
TRAVELWAYS—SURFACE ONLY
57.11025 Railed landings, backguards, and
other protection for fixed ladders.
57.11026 Protection for inclined fixed ladders.
57.11027 Scaffolds and working platforms.
TRAVELWAYS—UNDERGROUND ONLY
57.11036 Ladderway trap doors and guards.
57.11037 Ladderway openings.
57.11038 Entering a manway.
57.11040 Inclined travelways.
57.11041 Landings for inclined ladderways.
ESCAPEWAYS—UNDERGROUND ONLY
57.11050 Escapeways and refuges.
57.11051 Escape routes.
57.11052 Refuge areas.
57.11053 Escape and evacuation plans.
57.11054 Communication with refuge chambers.
57.11055 Inclined escapeways.
57.11056 Emergency hoists.
57.11058 Check-in, check-out system.
57.11059 Respirable atmosphere for hoist operators underground.
Subpart K—Electricity
kpayne on VMOFRWIN702 with $$_JOB
SURFACE AND UNDERGROUND
57.12001 Circuit overload protection.
57.12002 Controls and switches.
57.12003 Trailing cable overload protection.
57.12004 Electrical conductors.
57.12005 Protection of power conductors
from mobile equipment.
57.12006 Distribution boxes.
57.12007 Junction box connection procedures.
57.12008 Insulation and fittings for power
wires and cables.
57.12010 Isolation or insulation of communication conductors.
57.12011 High-potential electrical conductors.
57.12012 Bare signal wires.
57.12013 Splices and repairs of power cables.
57.12014 Handling energized power cables.
57.12016 Work
on
electrically-powered
equipment.
57.12017 Work on power circuits.
57.12018 Identification of power switches.
57.12019 Access to stationary electrical
equipment or switchgear.
57.12020 Protection
of
persons
at
switchgear.
57.12021 Danger signs.
SURFACE ONLY
57.12065 Short circuit and lightning protection.
57.12066 Guarding trolley wires and bare
powerlines.
57.12067 Installation of transformers.
57.12068 Locking transformer enclosures.
57.12069 Lightning protection for telephone
wires and ungrounded conductors.
57.12071 Movement or operation of equipment near high-voltage powerlines.
UNDERGROUND ONLY
57.12080 Bare conductor guards.
57.12081 Bonding metal pipelines to ground
return circuits.
57.12082 Isolation of powerlines.
57.12083 Support of power cables in shafts
and boreholes.
57.12084 Branch circuit disconnecting devices.
57.12085 Transformer stations.
57.12086 Location of trolley wire.
57.12088 Splicing trailing cables.
Subpart L—Compressed Air and Boilers
57.13001 General requirements for boilers
and pressure vessels.
57.13010 Reciprocating-type air compressors.
57.13011 Air receiver tanks.
57.13012 Compressor air intakes.
57.13015 Inspection of compressed-air receivers and other unfired pressure vessels.
57.13017 Compressor discharge pipes.
57.13019 Pressure system repairs.
57.13020 Use of compressed air.
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Pt. 57
57.13021
57.13030
30 CFR Ch. I (7–1–19 Edition)
High-pressure hose connections.
Boilers.
57.14214
57.14215
57.14216
57.14217
57.14218
cent
57.14219
Subpart M—Machinery and Equipment
57.14000
Definitions.
SAFETY DEVICES AND MAINTENANCE
REQUIREMENTS
57.14100 Safety defects; examination, correction and records.
57.14101 Brakes.
57.14102 Brakes for rail equipment.
57.14103 Operators’ stations.
57.14104 Tire repairs.
57.14105 Procedures during repairs or maintenance.
57.14106 Falling object protection.
57.14107 Moving machine parts.
57.14108 Overhead drive belts.
57.14109 Unguarded conveyors with adjacent
travelways.
57.14110 Flying or falling materials.
57.14111 Slusher, backlash guards and securing.
57.14112 Construction and maintenance of
guards.
57.14113 Inclined conveyors: backstops or
brakes.
57.14114 Air valves for pneumatic equipment.
57.14115 Stationary grinding machines.
57.14116 Hand-held power tools.
57.14130 Roll-over
protective
structures
(ROPS) and seat belts for surface equipment.
57.14131 Seat belts for surface haulage
trucks.
57.14132 Horns and back-up alarms for surface equipment.
57.14160 Mantrip trolley wire hazards underground.
57.14161 Makeshift couplings.
57.14162 Trip lights.
kpayne on VMOFRWIN702 with $$_JOB
SAFETY PRACTICES AND OPERATIONAL
PROCEDURES
57.14200 Warnings prior to starting or moving equipment.
57.14201 Conveyor start-up warnings.
57.14202 Manual cleaning of conveyor pulleys.
57.14203 Application of belt dressing.
57.14204 Machinery lubrication.
57.14205 Machinery, equipment, and tools.
57.14206 Securing movable parts.
57.14207 Parking procedures for unattended
equipment.
57.14208 Warning devices.
57.14209 Safety procedures for towing.
57.14210 Movement of dippers, buckets, loading booms, or suspended loads.
57.14211 Blocking equipment in a raised position.
57.14212 Chains, ropes, and drive belts.
57.14213 Ventilation and shielding for welding.
Train warnings.
Coupling or uncoupling cars.
Backpoling.
Securing parked railcars.
Movement of equipment on adjatracks.
Brakeman signals.
APPENDIX I TO SUBPART M OF PART 57—NATIONAL CONSENSUS STANDARDS
Subpart N—Personal Protection
SURFACE AND UNDERGROUND
57.15001 First aid materials.
57.15002 Hard hats.
57.15003 Protective footwear.
57.15004 Eye protection.
57.15005 Safety belts and lines.
57.15006 Protective equipment and clothing
for hazards and irritants.
57.15007 Protective equipment or clothing
for welding, cutting, or working with
molten metal.
57.15014 Eye protection when operating
grinding wheels.
SURFACE ONLY
57.15020
Life jackets and belts.
UNDERGROUND ONLY
57.15030 Provision and maintenance of selfrescue devices.
57.15031 Location of self-rescue devices.
Subpart O—Materials Storgage and
Handling
57.16001 Stacking and storage of materials.
57.16002 Bins, hoppers, silos, tanks, and
surge piles.
57.16003 Storage of hazardous materials.
57.16004 Containers for hazardous materials.
57.16005 Securing gas cylinders.
57.16006 Protection of gas cylinder valves.
57.16007 Taglines, hitches, and slings.
57.16009 Suspended loads.
57.16010 Dropping materials from overhead.
57.16011 Riding hoisted loads or on the hoist
hook.
57.16012 Storage of incompatible substances.
57.16013 Working with molten metal.
57.16014 Operator-carrying overhead cranes.
57.16015 Work or travel on overhead crane
bridges.
57.16016 Lift trucks.
57.16017 Hoisting heavy equipment or material.
Subpart P—Illumination
57.17001 Illumination of
areas.
57.17010 Electric lamps.
surface
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working
Mine Safety and Health Admin., Labor
Pt. 57
CONVEYANCES
Subpart Q—Safety Programs
SURFACE AND UNDERGROUND
57.18002 Examination of working places.
57.18006 New employees.
57.18009 Designation of person in charge.
57.18010 First aid.
57.18012 Emergency telephone numbers.
57.18013 Emergency communications system.
57.18014 Emergency medical assistance and
transportation.
SURFACE ONLY
57.18020
Working alone.
UNDERGROUND ONLY
57.18025 Working alone.
57.18028 Mine emergency and self-rescuer
training
Subpart R—Personnel Hoisting
57.19000
Application.
HOISTS
57.19001 Rated capacities.
57.19002 Anchoring.
57.19003 Driving mechanism connections.
57.19004 Brakes.
57.19005 Locking mechanism for clutch.
57.19006 Automatic hoist braking devices.
57.19007 Overtravel and overspeed devices.
57.19008 Friction hoist synchronizing mechanisms.
57.19009 Position indicator.
57.19010 Location of hoist controls.
57.19011 Drum flanges.
57.19012 Grooved drums.
57.19013 Diesel-and other fuel-injection-powered hoists.
57.19014 Friction hoist overtravel protection.
57.19017 Emergency braking for electric
hoists.
57.19018 Overtravel by-pass switches.
WIRE ROPES
57.19019 Guide ropes.
57.19021 Minimum rope strength.
57.19022 Initial measurement.
57.19023 Examinations.
57.19024 Retirement criteria.
57.19025 Load end attachments.
57.19026 Drum end attachment.
57.19027 End attachment retermination.
57.19028 End attachment replacement.
57.19030 Safety device attachments.
kpayne on VMOFRWIN702 with $$_JOB
elevated
Metal bonnets.
Hoisting persons in buckets.
Bucket requirements.
Rope guides.
HOISTING PROCEDURES
57.19055 Availability of hoist operator for
manual hoists.
57.19056 Availability of hoist operator for
automatic hoists.
57.19057 Hoist operator’s physical fitness.
57.19058 Experienced hoist operators.
57.19061 Maximum hoisting speeds.
57.19062 Maximum acceleration and deceleration.
57.19063 Persons allowed in hoist room.
57.19065 Lowering
conveyances
by
the
brakes.
57.19066 Maximum riders in a conveyance.
57.19067 Trips during shift changes.
57.19068 Orderly conduct in conveyances.
57.19069 Entering and leaving conveyances.
57.19070 Closing cage doors or gates.
57.19071 Riding in skips or buckets.
57.19072 Skips and cages in same compartment.
57.19073 Hoisting during shift changes.
57.19074 Riding the bail, rim, bonnet, or
crosshead.
57.19075 Use of open hooks.
57.19076 Maximum speeds for hoisting persons in buckets.
57.19077 Lowering buckets.
57.19078 Hoisting buckets from the shaft
bottom.
57.19079 Blocking mine cars.
57.19080 Hoisting tools, timbers, and other
materials.
57.19081 Conveyances not in use.
57.19083 Overtravel backout device.
SIGNALING
57.19090 Dual signaling systems.
57.19091 Signaling instructions to hoist operator.
57.19092 Signaling from conveyances.
57.19093 Standard signal code.
57.19094 Posting signal code.
57.19095 Location of signal devices.
57.19096 Familiarity with signal code.
SHAFTS
HEADFRAMES AND SHEAVES
57.19035 Headframe design.
57.19036 Headframe height.
57.19037 Fleet angles.
57.19038 Platforms around
sheaves.
57.19045
57.19049
57.19050
57.19054
head
57.19100 Shaft landing gates.
57.19101 Stopblocks and derail switches.
57.19102 Shaft guides.
57.19103 Dumping facilities and loading
pockets.
57.19104 Clearance at shaft stations.
57.19105 Landings with more than one shaft
entrance.
57.19106 Shaft sets.
57.19107 Precautions for work in compartment affected by hoisting operation.
57.19108 Posting warning signs during shaft
work.
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Pt. 57
30 CFR Ch. I (7–1–19 Edition)
57.19109 Shaft inspection and repair.
57.19110 Overhead protection for shaft deepening work.
57.19111 Shaft-sinking ladders.
INSPECTION AND MAINTENANCE
57.19120 Procedures for inspection, testing,
and maintenance.
57.19121 Recordkeeping.
57.19122 Replacement parts.
57.19129 Examinations and tests at beginning of shift.
57.19130 Conveyance shaft test.
57.19131 Hoist conveyance connections.
57.19132 Safety catches.
57.19133 Shaft.
57.19134 Sheaves.
57.19135 Rollers in inclined shafts.
Subpart S—Miscellaneous
57.20001 Intoxicating beverages and narcotics.
57.20002 Potable water.
57.20003 Housekeeping.
57.20005 Carbon tetrachloride.
57.20008 Toilet facilities.
57.20009 Tests for explosive dusts.
57.20010 Retaining dams.
57.20011 Barricades and warning signs.
57.20013 Waste receptacles.
57.20014 Prohibited areas for food and beverages.
57.20020 Unattended mine openings.
57.20021 Abandoned mine openings.
57.20031 Blasting underground in hazardous
areas.
57.20032 Two-way communication equipment for underground operations.
Subpart T—Safety Standards for Methane
in Metal and Nonmetal Mines
GENERAL
57.22001
57.22002
Scope.
Definitions.
MINE CATEGORIZATION
57.22003 Mine category or subcategory.
57.22004 Category placement or change in
placement.
57.22005 Notice and appeal of placement or
change in placement.
kpayne on VMOFRWIN702 with $$_JOB
FIRE PREVENTION AND CONTROL
57.22101 Smoking (I-A, II-A, III, and V-A
mines).
57.22102 Smoking (I-C mines).
57.22103 Open flames (I-A, II-A, III, and V-A
mines).
57.22104 Open flames (I-C mines).
57.22105 Smoking and open flames (IV
mines).
57.22106 Dust containing volatile matter (IC mines).
VENTILATION
57.22201 Mechanical ventilation (I-A, I-B, IC, II-A, II-B, III, IV, V-A, and V-B mines).
57.22202 Main fans (I-A, I-B, I-C, II-A, III, VA, and V-B mines).
57.22203 Main fan operation (I-C mines).
57.22204 Main fan operation and inspection
(I-A, II-A, III, and V-A mines).
57.22205 Doors on main fans (I-A, II-A, III,
and V-A mines).
57.22206 Main ventilation failure (I-A, II-A,
III, and V-A mines).
57.22207 Booster fans (I-A, II-A, III, and V-A
mines).
57.22208 Auxiliary fans (I-A, II-A, III, and VA mines).
57.22209 Auxiliary fans (I-C mines).
57.22210 In-line filters (I-C mines).
57.22211 Air flow (I-A mines).
57.22212 Air flow (I-C, II-A, and V-A mines).
57.22213 Air flow (III mines).
57.22214 Changes in ventilation (I-A, II-A,
III, and V-A mines).
57.22215 Separation of intake and return air
(I-A, II-A, III, and V-A mines).
57.22216 Separation of intake and return air
(I-C mines).
57.22217 Seals and stoppings (I-A, I-B and IC mines).
57.22218 Seals and stoppings (III, V-A, and
V-B mines).
57.22219 Seals and stoppings (II-A mines).
57.22220 Air passing unsealed areas (I-A, IIA, III, and V-A mines).
57.22221 Overcast and undercast construction (I-A, II-A, III, and V-A mines).
57.22222 Ventilation materials (I-A, I-B, I-C,
II-A, III, V-A, and V-B mines).
57.22223 Crosscuts before abandonment (III
mines).
57.22224 Auxiliary equipment stations (I-A
and III mines).
57.22225 Auxiliary equipment stations (I-C
mines).
57.22226 Testing for methane (IV mines).
57.22227 Approved testing devices (I-A, I-B,
I-C, II-A, II-B, III, IV, V-A, and V-B
mines).
57.22228 Preshift examination (I-A, I-C, II-A,
III, and V-A mines).
57.22229 Weekly testing (I-A, III, and V-A
mines).
57.22230 Weekly testing (II-A mines.
57.22231 Actions at 0.25 percent methane (IB, II-B, V-B and VI mines).
57.22232 Actions at 0.5 percent methane (I-B,
II-A, II-B, IV, V-B, and VI mines).
57.22233 Actions at 0.5 percent methane (I-C
mines).
57.22234 Actions at 1.0 percent methane (I-A,
I-B, III, V-A, and V-B mines).
57.22235 Actions at 1.0 percent methane (I-C,
II-A, II-B, and IV mines).
57.22236 Actions at 1.0 percent methane (VI
mines).
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Mine Safety and Health Admin., Labor
57.22237 Actions at 2.0 to 2.5 percent methane in bleeder systems (I-A and III
mines).
57.22238 Actions at 2.0 percent methane (I-B,
II-B, V-B, and VI mines).
57.22239 Actions at 2.0 percent methane (IV
mines).
57.22240 Actions at 2.0 percent methane (V-A
mines).
57.22241 Advance face boreholes (I-C mines).
EQUIPMENT
57.22301 Atmospheric monitoring systems
(I-A, II-A, and V-A mines).
57.22302 Approved equipment (I-A and V-A
mines).
57.22303 Approved equipment (I-C mines).
57.22304 Approved equipment (II-A mines).
57.22305 Approved equipment (III mines).
57.22306 Methane monitors (I-A mines).
57.22307 Methane monitors (II-A mines).
57.22308 Methane monitors (III mines).
57.22309 Methane monitors (V-A mines).
57.22310 Electrical cables (I-C mines).
57.22311 Electrical cables (II-A mines).
57.22312 Distribution boxes (II-A and V-A
mines).
57.22313 Explosion-protection systems (I-C
mines).
57.22314 Flow-control devices (V-A and V-B
mines).
57.22315 Self-contained breathing apparatus
(V-A mines).
UNDERGROUND RETORTS
57.22401 Underground retorts (I-A and I-B
mines).
ILLUMINATION
57.22501 Personal electric lamps (I-A, I-B, IC, II-A, II-B, III, IV, V-A, and V-B mines).
EXPLOSIVES
kpayne on VMOFRWIN702 with $$_JOB
57.22601 Blasting from the surface (I-A
mines).
57.22602 Blasting from the surface (I-C
mines).
57.22603 Blasting from the surface (II-A
mines).
57.22604 Blasting from the surface (II-B
mines).
57.22605 Blasting from the surface (V-A
mines).
57.22606 Explosive materials and blasting
units (III mines).
57.22607 Blasting on shift (III mines).
57.22608 Secondary blasting (I-A, II-A, and
V-A mines).
APPENDIX I TO SUBPART T OF PART 57—
STANDARD APPLICABILITY BY CATEGORY
OR SUBCATEGORY
AUTHORITY: 30 U.S.C. 811.
SOURCE: 50 FR 4082, Jan. 29, 1985, unless
otherwise noted.
§ 57.2
Subpart A—General
§ 57.1 Purpose and scope.
This part 57 sets forth mandatory
safety and health standards for each
underground metal or nonmetal mine,
including related surface operations,
subject to the Federal Mine Safety and
Health Act of 1977. The purpose of
these standards is the protection of
life, the promotion of health and safety, and the prevention of accidents.
§ 57.2 Definitions.
The following definitions apply to
this part. In addition definitions contained in any subpart of part 57 apply
in that subpart. If inconsistent with
the general definitions in this section,
the definition in the subpart will apply
in that subpart:
Abandoned areas means areas in
which work has been completed, no further work is planned, and travel is not
permitted.
Abandoned mine means all work has
stopped on the mine premises and an
office with a responsible person in
charge is no longer maintained at the
mine.
Abandoned workings means deserted
mine areas in which further work is
not intended.
Active workings means areas at, in, or
around a mine or plant where men
work or travel.
American Table of Distances means the
current edition of ‘‘The American
Table of Distances for Storage of Explosives’’ published by the Institute of
Makers of Explosives.
Approved means tested and accepted
for a specific purpose by a nationally
recognized agency.
Attended means presence of an individual or continuous monitoring to
prevent unauthorized entry or access.
In addition, areas containing explosive
material at underground areas of a
mine can be considered attended when
all access to the underground areas of
the mine is secured from unauthorized
entry. Vertical shafts shall be considered secure. Inclined shafts or adits
shall be considered secure when locked
at the surface.
Authorized person means a person approved or assigned by mine management to perform a specific type of duty
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§ 57.2
30 CFR Ch. I (7–1–19 Edition)
or duties or to be at a specific location
or locations in the mine.
Auxilary fan means a fan used to deliver air to a working place off the
main airstream; generally used with
ventilation tubing.
Barricaded means obstructed to prevent the passage of persons, vehicles,
or flying materials.
Barrier means a material object, or
objects that separates, keeps apart, or
demarcates in a conspicuous manner
such as cones, a warning sign, or tape.
Berm means a pile or mound of material along an elevated roadway capable
of moderating or limiting the force of a
vehicle in order to impede the vehicle’s
passage over the bank of the roadway.
Blast area means the area in which
concussion (shock wave), flying material, or gases from an explosion may
cause injury to persons. In determining
the blast area, the following factors,
shall be considered:
(1) Geology or material to be blasted.
(2) Blast pattern.
(3) Burden, depth, diameter, and
angle of the holes.
(4) Blasting experience of the mine.
(5) Delay system, powder factor, and
pounds per delay.
(6) Type and amount of explosive material.
(7) Type and amount of stemming.
Blast site means the area where explosive material is handled during loading, including the perimeter formed by
the loaded blastholes and 50 feet (15.2
meters) in all directions from loaded
holes. A minimum distance of 30 feet
(9.1 meters) may replace the 50-foot
(15.2-meter) requirement if the perimeter of loaded holes is demarcated with
a barrier. The 50-foot (15.2-meter) and
alternative 30-foot (9.1-meter) requirements also apply in all directions along
the full depth of the hole. In underground mines, at least 15 feet (4.6 meters) of solid rib, pillar, or broken rock
can be substituted for the 50-foot (15.2meter) distance. In underground mines
utilizing a block-caving system or
similar system, at least 6 feet (1.8 meters) of solid rib or pillar, including
concrete reinforcement of at least 10
inches (254 millimeters), with overall
dimensions of not less than 6 feet (1.8
meters) may be substituted for the 50foot (15.2-meter) distance requirement.
Blasting agent means any substance
classified as a blasting agent by the
Department of Transportation in 49
CFR 173.114(a) (44 FR 31182, May 31,
1979) which is incorporated by reference. This document is available for
inspection at each Metal and Nonmetal
Mine Safety and Health District Office
of the Mine Safety and Health Administration, and may be obtained from
the U.S. Government Printing Office,
Washington, DC 20402.
Blasting area means the area near
blasting operations in which concussion or flying material can reasonably
be expected to cause injury.
Blasting cap means a detonator which
is initiated by a safety fuse.
Blasting circuit means the electrical
circuit used to fire one or more electric
blasting caps.
Blasting switch means a switch used
to connect a power source to a blasting
circuit.
Blowout means a sudden, violent, release of gas or liquid due to the reservoir pressure in a petroleum mine.
Booster means any unit of explosive
or blasting agent used for the purpose
of perpetuating or intensifying an initial detonation.
Booster fan means a fan installed in
the main airstream or a split of the
main airstream to increase airflow
through a section or sections of a mine.
Capped fuse means a length of safety
fuse to which a blasting cap has been
attached.
Capped primer means a package or
cartridge of explosives which is specifically designed to transmit detonation
to other explosives and which contains
a detonator.
Circuit breaker means a device designed to open and close a circuit by
nonautomatic means and to open the
circuit automatically on a predetermined overcurrent setting without injury to itself when properly applied
within its rating.
Combustible means capable of being
ignited and consumed by fire.
Combustible material means a material
that, in the form in which it is used
and under the conditions anticipated,
will ignite, burn, support combustion
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Mine Safety and Health Admin., Labor
§ 57.2
or release flammable vapors when subjected to fire or heat. Wood, paper, rubber, and plastics are examples of combustible materials.
Company official means a member of
the company supervisory or technical
staff.
Competent person means a person having abilities and experience that fully
qualify him to perform the duty to
which he is assigned.
Conductor means a material, usually
in the form of a wire, cable, or bus bar,
capable of carrying an electric current.
Delay connector means a nonelectric
short interval delay device for use in
delaying blasts which are initiated by
detonating cord.
Detonating cord means a flexible cord
containing a solid core of high explosives.
Detonator means any device containing a detonating charge that is
used to initiate an explosive and includes but is not limited to blasting
caps, electric blasting caps and nonelectric instantaneous or delay blasting caps.
Distribution box means a portable apparatus with an enclosure through
which an electric circuit is carried to
one or more cables from a single incoming feed line; each cable circuit
being connected through individual
overcurrent protective devices.
Electric blasting cap means a detonator designed for and capable of being
initiated by means of an electric current.
Electrical grounding means to connect
with the ground to make the earth part
of the circuit.
Employee means a person who works
for wages or salary in the service of an
employer.
Employer means a person or organization which hires one or more persons to
work for wages or salary.
Emulsion means an explosive material
containing substantial amounts of
oxidizers dissolved in water droplets,
surrounded by an immiscible fuel.
Escapeway means a passageway by
which persons may leave a mine.
Explosive means any substance classified as an explosive by the Department
of Transportation in 49 CFR 173.53,
173.88 and 173.100 which are incorporated by reference. Title 49 CFR is
available for inspection at each Metal
and Nonmetal Mine Safety and Health
District Office of the Mine Safety and
Health Administration, and may be obtained from the U.S. Government
Printing Office, Washington, DC 20402.
Face or bank means that part of any
mine where excavating is progressing
or was last done.
Fire resistance rating means the time,
in minutes or hours, that an assembly
of materials will retain its protective
characteristics or structural integrity
upon exposure to fire.
Flame spread rating means the numerical designation that indicates the extent flame will spread over the surface
of a material during a specified period
of time.
Flammable means capable of being
easily ignited and of burning rapidly.
Flammable gas means a gas that will
burn in the normal concentrations of
oxygen in the air.
Flammable liquid a liquid that has a
flash point below 100 °F (37.8 °C), a
vapor pressure not exceeding 40 pounds
per square inch (absolute) at 100 °F
(37.8 °C), and is known as a Class I liquid.
Flash point means the minimum temperature at which sufficient vapor is
released by a liquid or solid to form a
flammable vapor-air mixture at atmospheric pressure.
Geological area means an area characterized by the presence of the same ore
bodies, the same stratigraphic sequence of beds, or the same ore-bearing
geological formation.
Highway means any public street,
public alley or public road.
High potential means more than 650
volts.
Hoist means a power driven windlass
or drum used for raising ore, rock, or
other material from a mine, and for
lowering or raising persons and material.
Igniter cord means a fuse, cordlike in
appearance, which burns progressively
along its length with an external flame
at the zone of burning, and is used for
lighting a series of safety fuses in the
desired sequence.
Insulated means separated from other
conducting surfaces by a dielectric substance permanently offering a high resistance to the passage of current and
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§ 57.2
30 CFR Ch. I (7–1–19 Edition)
to disruptive discharge through the
substance. When any substance is said
to be insulated, it is understood to be
insulated in a manner suitable for the
conditions to which it is subjected.
Otherwise, it is, within the purpose of
this definition, uninsulated. Insulating
covering is one means for making the
conductor insulated.
Insulation means a dielectric substance offering a high resistance to the
passage of current and to a disruptive
discharge through the substance.
Laminated partition means a partition
composed of the following material and
minimum nominal dimensions: 1⁄2-inchthick plywood, 1⁄2-inch-thick gypsum
wallboard, 1⁄8-inch-thick low carbon
steel, and 1⁄4-inch-thick plywood, bonded together in that order (IME–22 Box).
A laminated partition also includes alternative construction materials described in the Institute of Makers of
Explosives (IME) Safety Library Publication No. 22, ‘‘Recommendations for
the Safe Transportation of Detonators
in a Vehicle with Other Explosive Materials’’ (May 1993), and the ‘‘Generic
Loading Guide for the IME–22 Container’’ (October 1993). The IME is located at 1120 19th Street NW., Suite 310,
Washington, DC 20036–3605; 202–429–9280;
https://www.ime.org. This incorporation
by reference has been approved by the
Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR
part 51. Copies are available at MSHA’s
Office of Standards, Regulations, and
Variances, 201 12th Street South, Arlington, VA 22202–5452; 202–693–9440; and
at all Metal and Nonmetal Mine Safety
and Health District Offices, or available for inspection at the National Archives and Records Administration
(NARA). For information on the availability of this material at NARA, call
202–741–6030,
or
go
to:
http://
www.archives.gov/federallregister/
codeloflfederallregulations/
ibrllocations.html.
Lay means the distance parallel to
the axis of the rope in which a strand
makes one complete turn about the
axis of the rope.
Loading means placing explosive material either in a blasthole or against
the material to be blasted.
Low potential means 650 volts or less.
Magazine means a facility for the
storage of explosives, blasting agents,
or detonators.
Main fan means a fan that controls
the entire airflow of the mine, or the
airflow of one of the major air circuits.
Major electrical installation means an
assemblage of stationary electrical
equipment for the generation, transmission, distribution, or conversion of
electrical power.
Mantrip means a trip on which persons are transported to and from a
work area.
Mill includes any ore mill, sampling
works, concentrator, and any crushing,
grinding, or screening plant used at,
and in connection with, an excavation
or mine.
Mine atmosphere means any point at
least 12 inches away from the back,
face, rib, and floor in any mine; and additionally, in a Category IV mine, at
least 3 feet laterally away from the collar of a borehole which releases gas
into a mine.
Mine opening means any opening or
entrance from the surface into a mine.
Misfire means the complete or partial
failure of a blasting charge to explode
as planned.
Mobile equipment means wheeled,
skid-mounted, track-mounted, or railmounted equipment capable of moving
or being moved.
Multipurpose dry-chemical fire extinguisher means an extinguisher having a
rating of at least 2–A:10–B:C and containing a nominal 4.5 pounds or more of
dry-chemical agent.
Noncombustible material means a material that, in the form in which it is
used and under the conditions anticipated, will not ignite, burn, support
combustion, or release flammable vapors when subjected to fire or heat.
Concrete, masonry block, brick, and
steel are examples of noncombustible
materials.
Non-electric delay blasting cap means a
detonator with an integral delay element and capable of being initiated by
miniaturized detonating cord.
Outburst means the sudden, violent
release of solids and high-pressure occluded gases, including methane in a
domal salt mine.
Overburden means material of any
nature, consolidated or unconsolidated,
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Mine Safety and Health Admin., Labor
§ 57.2
that overlies a deposit of useful materials or ores that are to be mined.
Overload means that current which
will cause an excessive or dangerous
temperature in the conductor or conductor insulation.
Permissible means a machine, material, apparatus, or device which has
been investigated, tested, and approved
by the Bureau of Mines or the Mine
Safety and Health Administration, and
is maintained in permissible condition.
Potable water means water which
shall meet the applicable minimum
health requirements for drinking water
established by the State or community
in which the mine is located or by the
Environmental Protection Agency in 40
CFR part 141, pages 169–182 revised as of
July 1, 1977. Where no such requirements are applicable, the drinking
water provided shall conform with the
Public Health Service Drinking Water
Standards, 42 CFR part 72, subpart J,
pages 527–533, revised as of October 1,
1976. Publications to which references
are made in this definition are hereby
made a part hereof. These incorporated
publications are available for inspection at each Metal and Nonmetal Mine
Safety and Health District Office of the
Mine Safety and Health Administration.
Powder chest means a substantial,
nonconductive
portable
container
equipped with a lid and used at blasting sites for explosives other than
blasting agents.
Primer means a unit, package, or cartridge of explosives used to initiate
other explosives or blasting agents, and
which contains a detonator.
Reverse-current protection means a
method or device used on direct-current circuits or equipment to prevent
the flow of current in a reverse direction.
Rock burst means a sudden and violent failure of overstressed rock resulting in the instantaneous release of
large amounts of accumulated energy.
Rock burst does not include a burst resulting from pressurized mine gases.
Rock fixture means any tensioned or
nontensioned device or material inserted into the ground to strengthen or
support the ground.
Roll protection means a framework,
safety canopy or similar protection for
the operator when equipment overturns.
Safety can means an approved container, of not over 5 gallons capacity,
having a spring-closing lid and spout
cover.
Safety fuse means a flexible cord containing an internal burning medium by
which fire is conveyed at a continuous
and uniform rate for the purpose of firing blasting caps or a black powder
charge.
Safety switch means a sectionalizing
switch that also provides shunt protection in blasting circuits between the
blasting switch and the shot area.
Scaling means removal of insecure
material from a face or highwall.
Secondary safety connection means a
second connection between a conveyance and rope, intended to prevent the
conveyance from running away or falling in the event the primary connection fails.
Shaft means a vertical or inclined
shaft, a slope, incline, or winze.
Short circuit means an abnormal connection of relatively low resistance,
whether made accidentally or intentionally, between two points of difference potential in a circuit.
Slurry (as applied to blasting). See
‘‘Water gel.’’
Storage facility means the entire class
of structures used to store explosive
materials. A ‘‘storage facility’’ used to
store blasting agents corresponds to a
BATF Type 4 or 5 storage facility.
Storage tank means a container exceeding 60 gallons in capacity used for
the storage of flammable or combustible liquids.
Stray current means that portion of a
total electric current that flows
through paths other than the intended
circuit.
Substantial construction means construction of such strength, material,
and workmanship that the object will
withstand all reasonable shock, wear,
and usage to which it will be subjected.
Suitable means that which fits, and
has the qualities or qualifications to
meet a given purpose, occasion, condition, function, or circumstance.
Travelway means a passage, walk or
way regularly used and designated for
persons to go from one place to another.
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§ 57.1000
30 CFR Ch. I (7–1–19 Edition)
Water gel or Slurry (as applied to
blasting) means an explosive or blasting agent containing substantial portions of water.
Wet drilling means the continuous application of water through the central
hole of hollow drill steel to the bottom
of the drill hole.
Working level (WL) means any combination of the short-lived radon
daughters in one liter of air that will
result in ultimate emission of 1.3 × 105
MeV (million electron volts) of potential alpha energy, and exposure to
these radon daughters over a period of
time is expressed in terms of ‘‘working
level months’’ (WLM). Inhalation of air
containing a radon daughter concentration of 1 WL for 173 hours results
in an exposure of 1 WLM.’’
Working place means any place in or
about a mine where work is being performed.
[69 FR 38840, June 29, 2004, as amended at 80
FR 52987, Sept. 2, 2015]
§ 57.1000 Notification of commencement of operations and closing of
mines.
The owner, operator, or person in
charge of any metal and nonmetal
mine shall notify the nearest MSHA
Metal and Nonmental Mine Safety and
Health district office before starting
operations, of the approximate or actual date mine operation will commence. The notification shall include
the mine name, location, the company
name, mailing address, person in
charge, and whether operations will be
continuous or intermittent. When any
mine is closed, the person in charge
shall notify the nearest district office
as provided above and indicate whether
the closure is temporary or permanent.
[51 FR 36198, Oct. 8, 1986, as amended at 60 FR
33723, June 29, 1995; 60 FR 35695, July 11, 1995;
71 FR 16667, Apr. 3, 2006]
Subpart B—Ground Control
AUTHORITY: 30 U.S.C. 811.
SOURCE: 51 FR 36198, Oct. 8, 1986, unless
otherwise noted.
Definitions.
The following definitions apply in
this subpart.
Travelway. A passage, walk, or
haulageway regularly used or designated for persons to go from one
place to another.
[51 FR 36198, Oct. 8, 1986, as amended at 69 FR
38842, June 29, 2004]
SCALING AND SUPPORT—SURFACE AND
UNDERGROUND
§ 57.3200 Correction of hazardous conditions.
Ground conditions that create a hazard to persons shall be taken down or
supported before other work or travel
is permitted in the affected area. Until
corrective work is completed, the area
shall be posted with a warning against
entry and, when left unattended, a barrier shall be installed to impede unauthorized entry.
§ 57.3201
ing.
PROCEDURES
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§ 57.3000
Location for performing scal-
Scaling shall be performed from a location which will not expose persons to
injury from falling material, or other
protection from falling material shall
be provided.
§ 57.3202
Scaling tools.
Where manual scaling is performed, a
scaling bar shall be provided. This bar
shall be of a length and design that will
allow the removal of loose material
without exposing the person performing the work to injury.
§ 57.3203
Rock fixtures.
(a) For rock bolts and accessories addressed in ASTM F432–95, ‘‘Standard
Specification for Roof and Rock Bolts
and Accessories,’’ the mine operator
shall—
(1) Obtain a manufacturer’s certification that the material was manufactured and tested in accordance with
the specifications of ASTM F432–95;
and
(2) Make this certification available
to an authorized representative of the
Secretary and to the representative of
miners.
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Mine Safety and Health Admin., Labor
§ 57.3401
(b) Fixtures and accessories not addressed in ASTM F432–95 may be used
for ground support provided they—
(1) Have been successful in supporting the ground in an area with
similar strata, opening dimensions and
ground stresses in any mine; or
(2) Have been tested and shown to be
effective in supporting ground in an
area of the affected mine which has
similar strata, opening dimensions, and
ground stresses as the area where the
fixtures are expected to be used. During the test process, access to the test
area shall be limited to persons necessary to conduct the test.
(c) Bearing plates shall be used with
fixtures when necessary for effective
ground support.
(d) The diameter of finishing bits
shall be within a tolerance of plus or
minus 0.030 inch of the manufacturer’s
recommended hole diameter for the anchor used. When separate finishing bits
are used, they shall be distinguishable
from other bits.
(e) Damaged or deteriorated cartridges of grouting material shall not
be used.
(f) When rock bolts tensioned by
torquing are used as a means of ground
support,
(1) Selected tension level shall be—
(i) At least 50 percent of either the
yield point of the bolt or anchorage capacity of the rock, whichever is less;
and
(ii) No greater than the yield point of
the bolt or anchorage capacity of the
rock.
(2) The torque of the first bolt, every
tenth bolt, and the last bolt installed
in each work area during the shift shall
be accurately determined immediately
after installation. If the torque of any
fixture tested does not fall within the
installation torque range, corrective
action shall be taken.
(g) When grouted fixtures can be tested by applying torque, the first fixture
installed in each work place shall be
tested to withstand 150 foot-pounds of
torque. Should it rotate in the hole, a
second fixture shall be tested in the
same manner. If the second fixture also
turns, corrective action shall be taken.
(h) When other tensioned and nontensioned fixtures are used, test methods
shall be established and used to verify
their effectiveness.
(i) The mine operator shall certify
that tests were conducted and make
the certification available to an authorized representative of the Secretary.
[51 FR 36198, Oct. 8, 1986, as amended at 51 FR
36804, Oct. 16, 1986; 63 FR 20030, Apr. 22, 1998]
SCALING AND SUPPORT—UNDERGROUND
ONLY
§ 57.3360
Ground support use.
Ground support shall be used where
ground conditions, or mining experience in similar ground conditions in
the mine, indicate that it is necessary.
When ground support is necessary, the
support system shall be designed, installed, and maintained to control the
ground in places where persons work or
travel in performing their assigned
tasks. Damaged, loosened, or dislodged
timber use for ground support which
creates a hazard to persons shall be repaired or replaced prior to any work or
travel in the affected area.
PRECAUTIONS—SURFACE AND
UNDERGROUND
§ 57.3400
Secondary breakage.
Prior to secondary breakage operations, the material to be broken,
other than hanging material, shall be
positioned or blocked to prevent movement which would endanger persons in
the work area. Secondary breakage
shall be performed from a location
which would not expose persons to danger.
§ 57.3401 Examination of ground conditions.
Persons experienced in examining
and testing for loose ground shall be
designated by the mine operator. Appropriate supervisors or other designated persons shall examine and,
where applicable, test ground conditions in areas where work is to be performed, prior to work commencing,
after blasting, and as ground conditions warrant during the work shift.
Underground
haulageways
and
travelways and surface area highwalls
and banks adjoining travelways shall
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§ 57.3430
30 CFR Ch. I (7–1–19 Edition)
be examined weekly or more often if
changing ground conditions warrant.
PRECAUTIONS—SURFACE ONLY
§ 57.3430 Activity between machinery
or equipment and the highwall or
bank.
Persons shall not work or travel between machinery or equipment and the
highwall or bank where the machinery
or equipment may hinder escape from
falls or slides of the highwall or bank.
Travel is permitted when necessary for
persons to dismount.
PRECAUTIONS—UNDERGROUND ONLY
§ 57.3460 Maintenance between machinery or equipment and ribs.
Persons shall not perform maintenance work between machinery or
equipment and ribs unless the area has
been tested and, when necessary, secured.
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§ 57.3461
Rock bursts.
(a) Operators of mines which have experienced a rock burst shall—
(1) Within twenty four hours report
to the nearest MSHA office each rock
burst which:
(i) Causes persons to be withdrawn;
(ii) Impairs ventilation;
(iii) Impedes passage; or
(iv) Disrupts mining activity for
more than one hour.
(2) Develop and implement a rock
burst control plan within 90 days after
a rock burst has been experienced.
(b) The plan shall include—
(1) Mining and operating procedures
designed to reduce the occurrence of
rock bursts;
(2) Monitoring procedures where detection methods are used; and
(3) Other measures to minimize exposure of persons to areas which are
prone to rock bursts.
(c) The plan shall be updated as conditions warrant.
(d) The plan shall be available to an
authorized representative of the Secretary and to miners or their representatives.
Subpart C—Fire Prevention and
Control
AUTHORITY: Sec. 101, Federal Mine Safety
and Health Act of 1977, Pub. L. 91–173 as
amended by Pub. L. 95–164, 91 Stat. 1291 (30
U.S.C. 811).
§ 57.4000 Definitions.
The following definitions apply in
this subpart.
Combustible liquids. Liquids having a
flash point at or above 100 °F (37.8 °C).
They are divided into the following
classes:
Class II liquids—those having flash points at
or above 100 °F (37.8 °C) and below 140 °F (60
°C).
Class IIIA liquids—those having flash points
at or above 140 °F (60 °C) and below 200 °F
(93.4 °C).
Class IIIB liquids—those having flash points
at or above 200 °F (93.4 °C).
Escapeway. A designated passageway
by which persons can leave an underground mine.
Flash point. The minimum temperature at which sufficient vapor is released by a liquid to form a flammable
vapor-air mixture near the surface of
the liquid.
Main fan. A fan that controls the entire airflow of an underground mine or
the airflow of one of the major air circuits of the mine.
Mine opening. Any opening or entrance from the surface into an underground mine.
Safety can. A container of not over
five gallons capacity that is designed
to safely relieve internal pressure when
exposed to heat and has a spring-closing lid and spout cover.
[50 FR 4082, Jan. 29, 1985, as amended at 68
FR 32361, May 30, 2003; 69 FR 38842, June 29,
2004]
§ 57.4011 Abandoned electric circuits.
Abandoned electric circuits shall be
deenergized and isolated so that they
cannot become energized inadvertently.
§ 57.4057 Underground trailing cables.
Underground trailing cables shall be
accepted or approved by MSHA as
flame resistant.
[57 FR 61223, Dec. 23, 1992]
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Mine Safety and Health Admin., Labor
PROHIBITIONS/PRECAUTIONS/
HOUSEKEEPING
§ 57.4100 Smoking and use of open
flames.
No person shall smoke or use an open
flame where flammable or combustible
liquids, including greases, or flammable gases are—
(a) Used or transported in a manner
that could create a fire hazard; or
(b) Stored or handled.
§ 57.4101
Warning signs.
Readily visible signs prohibiting
smoking and open flames shall be posted where a fire or explosion hazard exists.
§ 57.4102
Spillage and leakage.
Flammable or combustible liquid
spillage or leakage shall be removed in
a timely manner or controlled to prevent a fire hazard.
§ 57.4103 Fueling internal combustion
engines.
Internal combustion engines shall be
switched off before refueling if the fuel
tanks are integral parts of the equipment. This standard does not apply to
diesel-powered equipment.
§ 57.4104
Combustible waste.
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(a) Waste materials, including liquids, shall not accumulate in quantities that could create a fire hazard.
(b) Waste or rags containing flammable or combustible liquids that
could create a fire hazard shall be
placed in the following containers until
disposed of properly:
(1) Underground—covered metal containers.
(2) On the surface—covered metal
containers or equivalent containers
with flame containment characteristics.
§ 57.4200
(2) Unburied, flammable or combustible liquid storage tanks.
(3) Any group of containers used for
storage of more than 60 gallons of flammable or combustible liquids.
(b) The area within the 25-foot perimeter shall be kept free of dry vegetation.
§ 57.4131 Surface fan installations and
mine openings.
(a) On the surface, no more than one
day’s supply of combustible materials
shall be stored within 100 feet of mine
openings or within 100 feet of fan installations used for underground ventilation.
(b) the one-day supply shall be kept
at least 25 feet away from any mine
opening except during transit into the
mine.
(c) Dry vegetation shall not be permitted within 25 feet of mine openings.
§ 57.4160 Underground electric substations and liquid storage facilities.
The requirements of this standard
apply to underground areas only.
(a) Areas within 25 feet of the following shall be free of combustible materials:
(1) Electric substations.
(2) Unburied, combustible liquid storage tanks.
(3) Any group of containers used for
storage of more than 60 gallons of combustible liquids.
(b) This standard does not apply to
installed wiring or timber that is coated with at least one inch of shotcrete,
one-half inch of gunite, or other noncombustible materials with equivalent
fire protection characteristics.
§ 57.4161 Use of fire underground.
Fires shall not be lit underground,
except for open-flame torches. Torches
shall be attended at all times while lit.
§ 57.4130 Surface electric substations
and liquid storage facilities.
FIREFIGHTING EQUIPMENT
The requirements of this standard
apply to surface areas only.
(a) If a hazard to persons could be
created, no combustible materials shall
be stored or allowed to accumulate
within 25 feet of the following:
(1) Electric substations.
§ 57.4200 General requirements.
(a) For fighting fires that could endanger persons, each mine shall have—
(1) Onsite firefighting equipment for
fighting fires in their early stages; and
(2) Onsite firefighting equipment for
fighting fires beyond their early stages,
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§ 57.4201
30 CFR Ch. I (7–1–19 Edition)
or the mine shall have made prior arrangements with a local fire department to fight such fires.
(b) This onsite firefighting equipment shall be—
(1) Of the type, size, and quantity
that can extinguish fires of any class
which would occur as a result of the
hazards present; and
(2) Strategically located, readily accessible, plainly marked, and maintained in fire-ready condition.
(b) At the completion of each inspection or test required by this standard,
the person making the inspection or
test shall certify that the inspection or
test has been made and the date on
which it was made. Certifications of
hydrostatic testing shall be retained
until the fire extinguisher is retested
or permanently removed from service.
Other certifications shall be retained
for one year.
TABLE C–1—HYDROSTATIC TEST INTERVALS
FOR FIRE EXTINGUISHERS
[50 FR 4082, Jan. 29, 1985, as amended at 50
FR 20100, May 14, 1985]
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§ 57.4201
Test interval
(years)
Extinguisher type
Inspection.
(a) Firefighting equipment shall be
inspected according to the following
schedules:
(1) Fire extinguishers shall be inspected visually at least once a month
to determine that they are fully
charged and operable.
(2) At least once every twelve
months, maintenance checks shall be
made of mechanical parts, the amount
and condition of extinguishing agent
and expellant, and the condition of the
hose, nozzle, and vessel to determine
that the fire extinguishers will operate
effectively.
(3) Fire extinguishers shall be
hydrostatically tested according to
Table C–1 or a schedule based on the
manufacturer’s specifications to determine the integrity of extinguishing
agent vessels.
(4) Water pipes, valves, outlets, hydrants, and hoses that are part of the
mine’s firefighting system shall be visually inspected at least once every
three months for damage or deterioration and use-tested at least once every
twelve months to determine that they
remain functional.
(5) Fire suppression systems shall be
inspected at least once every twelve
months. An inspection schedule based
on the manufacturer’s specifications or
the equivalent shall be established for
individual components of a system and
followed to determine that the system
remains functional. Surface fire suppression systems are exempt from
these inspection requirements if the
systems are used solely for the protection of property and no persons would
be affected by a fire.
Soda Acid ..............................................................
Cartridge-Operated Water and/or Antifreeze ........
Stored-Pressure Water and/or Antifreeze .............
Wetting Agent ........................................................
Foam ......................................................................
AFFF (Aqueous Film Forming Foam) ...................
Loaded Stream ......................................................
Dry-Chemical with Stainless Steel Shells .............
Carbon Dioxide ......................................................
Dry-Chemical, Stored Pressure, with Mild Steel
Shells, Brazed Brass Shells, or Aluminum
Shells .................................................................
Dry-Chemical, Cartridge or Cylinder Operated,
with Mild Steel Shells .........................................
Bromotrifluoromethane-Halon 1301 ......................
Bromochlorodifluoromethane-Halon 1211 .............
Dry-Powder, Cartridge or Cylinder-Operated, with
Mild Steel Shells 1 ..............................................
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12
12
12
1 Except
for stainless steel and steel used for compressed
gas cylinders, all other steel shells are defined as ‘‘mild steel’’
shells.
§ 57.4202 Fire hydrants.
If fire hydrants are part of the mine’s
firefighting system, the hydrants shall
be provided with—
(a) Uniform fittings or readily available adapters for onsite firefighting
equipment;
(b) Readily available wrenches or
keys to open the valves; and
(c) Readily available adapters capable of connecting hydrant fittings to
the hose equipment of any firefighting
organization relied upon by the mine.
§ 57.4203 Extinguisher recharging or
replacement.
Fire extinguishers shall be recharged
or replaced with a fully charged extinguisher promptly after any discharge.
§ 57.4230 Surface self-propelled equipment.
(a)(1) Whenever a fire or its effects
could impede escape from self-propelled
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Mine Safety and Health Admin., Labor
§ 57.4360
equipment, a fire extinguisher shall be
on the equipment.
(2) Whenever a fire or its effects
would not impede escape from the
equipment but could affect the escape
of other persons in the area, a fire extinguisher shall be on the equipment or
within 100 feet of the equipment.
(b) A fire suppression system may be
used as an alternative to fire extinguishers if the system can be manually
activated.
(c) Fire extinguishers or fire suppression systems shall be of a type and size
that can extinguish fires of any class in
their early stages which could originate from the equipment’s inherent
fire hazards. Fire extinguishers or
manual actuators for the suppression
system shall be located to permit their
use by persons whose escape could be
impeded by fire.
uids, pump rooms, compressor rooms,
and hoist rooms shall be provided with
fire protection of a type, size, and
quantity that can extinguish fires of
any class in their early stages which
could occur as a result of the hazards
present.
§ 57.4260 Underground
equipment.
self-propelled
(a) Whenever self-propelled equipment is used underground, a fire extinguisher shall be on the equipment. This
standard does not apply to compressedair powered equipment without inherent fire hazards.
(b) A fire suppression system may be
used as an alternative to fire extinguishers if the system can be manually
actuated.
(c) Fire extinguishers or fire suppression systems shall be of a type and size
that can extinguish fires of any class in
their early stages which could originate from the equipment’s inherent
fire hazards. The fire extinguishers or
the manual actuator for the suppression system shall be readily accessible
to the equipment operator.
§ 57.4261
Shaft-station waterlines.
kpayne on VMOFRWIN702 with $$_JOB
Waterline outlets that are located at
underground shaft stations and are
part of the mine’s fire protection system shall have at least one fitting located for, and capable of, immediate
connection to firefighting equipment.
§ 57.4262 Underground
transformer
stations, combustible liquid storage
and dispensing areas, pump rooms,
compressor rooms, and hoist rooms.
Transformer stations, storage and
dispensing areas for combustible liq-
§ 57.4263
Underground belt conveyors.
Fire protection shall be provided at
the head, tail, drive, and take-up pulleys of underground belt conveyors.
Provisions shall be made for extinguishing fires along the beltline. Fire
protection shall be of a type, size, and
quantity that can extinguish fires of
any class in their early stages which
could occur as a result of the fire hazards present.
FIREFIGHTING PROCEDURES/ALARMS/
DRILLS
§ 57.4330 Surface firefighting, evacuation, and rescue procedures.
(a) Mine operators shall establish
emergency firefighting, evacuation,
and rescue procedures for the surface
portions of their operations. These procedures shall be coordinated in advance
with available firefighting organizations.
(b) Fire alarm procedures or systems
shall be established to promptly warn
every person who could be endangered
by a fire.
(c) Fire alarm systems shall be maintained in operable condition.
§ 57.4331
Surface firefighting drills.
Emergency firefighting drills shall be
held at least once every six months for
persons assigned surface firefighting
responsibilities by the mine operator.
§ 57.4360
Underground alarm systems.
(a) Fire alarm systems capable of
promptly warning every person underground, except as provided in paragraph (b), shall be provided and maintained in operating condition.
(b) If persons are assigned to work
areas beyond the warning capabilities
of the system, provisions shall be made
to alert them in a manner to provide
for their safe evacuation in the event
of a fire.
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§ 57.4361
30 CFR Ch. I (7–1–19 Edition)
§ 57.4361 Underground
drills.
evacuation
(a) At least once every six months,
mine evacuation drills shall be held to
assess the ability of all persons underground to reach the surface or other
designated points of safety within the
time limits of the self-rescue devices
that would be used during an actual
emergency.
(b) The evacuation drills shall—
(1) Be held for each shift at some
time other than a shift change and involve all persons underground;
(2) Involve activation of the fire
alarm system; and
(3) Include evacuation of all persons
from their work areas to the surface or
to
designated
central
evacuation
points.
(c) At the completion of each drill,
the mine operator shall certify the
date and the time the evacuation began
and ended. Certifications shall be retained for at least one year after each
drill.
§ 57.4362 Underground rescue and firefighting operations.
kpayne on VMOFRWIN702 with $$_JOB
Following evacuation of a mine in a
fire emergency, only persons wearing
and trained in the use of mine rescue
apparatus shall participate in rescue
and firefighting operations in advance
of the fresh air base.
escapeways for all areas of the mine in
which they normally work or travel.
(d) At the completion of any instruction given under this standard, the
mine operator shall certify the date
that the instruction was given. Certifications shall be retained for at least
one year.
FLAMMABLE AND COMBUSTIBLE LIQUIDS
AND GASES
§ 57.4400
Use restrictions.
(a) Flammable liquids shall not be
used for cleaning.
(b) Solvents shall not be used near an
open flame or other ignition source,
near any source of heat, or in an atmosphere that can elevate the temperature of the solvent above the flash
point.
§ 57.4401
Storage tank foundations.
Fixed, unburied, flammable or combustible liquid storage tanks shall be
securely mounted on firm foundations.
Piping shall be provided with flexible
connections or other special fittings
where necessary to prevent leaks
caused by tanks settling.
§ 57.4402
Safety can use.
Small quantities of flammable liquids drawn from storage shall be kept
in safety cans labeled to indicate the
contents.
§ 57.4363 Underground evacuation instruction.
§ 57.4430
(a) At least once every twelve
months, all persons who work underground shall be instructed in the escape and evacuation plans and procedures and fire warning signals in effect
at the mine.
(b) Whenever a change is made in escape and evacuation plans and procedures for any area of the mine, all persons affected shall be instructed in the
new plans or procedures.
(c) Whenever persons are assigned to
work in areas other than their regularly assigned areas, they shall be instructed about the escapeway for that
area at the time of such assignment.
However, persons who normally work
in more than one area of the mine shall
be instructed at least once every
twelve months about the location of
The requirements of this standard
apply to surface areas only.
(a) Storage tanks for flammable or
combustible liquids shall be—
(1) Capable of withstanding working
pressures and stresses and compatible
with the type of liquid stored;
(2) Maintained in a manner that prevents leakage;
(3) Isolated or separated from ignition sources to prevent fire or explosion; and
(4) Vented or otherwise constructed
to prevent development of pressure or
vacuum as a result of filling, emptying,
or atmospheric temperature changes.
Vents for storage of Class I, II, or IIIA
liquids shall be isolated or separated
from ignition sources. These pressure
relief requirements do not apply to
Surface storage facilities.
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Mine Safety and Health Admin., Labor
§ 57.4462
tanks used for storage of Class IIIB liquids that are larger than 12,000 gallons
in capacity.
(b) All piping, valves, and fittings
shall be—
(1) Capable of withstanding working
pressures and stresses;
(2) Compatible with the type of liquid
stored; and
(3) Maintained in a manner that prevents leakage.
(c) Fixed, unburied tanks located
where escaping liquid could present a
hazard to persons shall be provided
with—
(1) Containment for the entire capacity of the largest tank; or
(2) Drainage to a remote impoundment area that does not endanger persons. However, storage of only Class
IIIB liquids does not require containment or drainage to remote impoundment.
less than a safety can. Each cabinet
shall be labeled ‘‘flammables.’’
(2) Acetylene and liquefied petroleum
gases stored in containers designed for
that specific purpose.
(b) Gasoline shall not be stored underground in any quantity.
§ 57.4431
Surface storage restrictions.
(a) On the surface, no unburied flammable or combustible liquids or flammable gases shall be stored within 100
feet of the following:
(1) Mine openings or structures attached to mine openings.
(2) Fan installations for underground
ventilation.
(3) Hoist houses.
(b) Under this standard, the following
may be present in the hoist house in
quantities necessary for the day-to-day
maintenance of the hoist machinery:
(1) Flammable liquids in safety cans
or in other containers placed in tightly
closed cabinets. The safety cans and
cabinets shall be kept away from any
heat source, and each cabinet shall be
labeled ‘‘flammables.’’
(2) Combustible liquids in closed containers. The cointainers shall be kept
away from any heat source and the
hoist operator’s work station.
kpayne on VMOFRWIN702 with $$_JOB
§ 57.4460 Storage of flammable liquids
underground.
(a) Flammable liquids shall not be
stored underground, except—
(1) Small quantities stored in tightly
closed cabinets away from any heat
source. The small quantities shall be
stored in safety cans or in non-glass
containers of a capacity equal to or
§ 57.4461 Gasoline use restrictions underground.
If gasoline is used underground to
power internal combustion engines—
(a) The mine shall be nongassy and
shall have multiple horizontal or inclined roadways from the surface large
enough to accommodate vehicular traffic;
(b) All roadways and other openings
shall connect with another opening
every 100 feet by a passage large
enough to accommodate any vehicle in
the mine or alternate routes shall provide equivalent escape capabilities; and
(c) No roadway or other opening shall
be supported or lined with wood or
other combustible materials.
§ 57.4462 Storage of combustible liquids underground.
The requirements of this standard
apply to underground areas only.
(a) Combustible liquids, including oil
or grease, shall be stored in non-glass
containers or storage tanks. The containers or storage tanks shall be—
(1) Capable of withstanding working
pressures and stresses and compatible
with the type of liquid stored;
(2) Maintained in a manner that prevents leakage;
(3) Located in areas free of combustible materials or in areas where any
exposed combustible materials are
coated with one inch of shotcrete, onehalf inch of gunite, or other noncombustible material with equivalent
fire protection characteristics; and
(4) Separated from explosives or
blasting agents, shaft stations, and ignition sources including electric equipment that could create sufficient heat
or sparks to pose a fire hazard. Separation shall be sufficient to prevent the
occurrence or minimize the spread of
fire.
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§ 57.4463
30 CFR Ch. I (7–1–19 Edition)
(b) Storage tanks shall be vented or
otherwise constructed to prevent development of pressure or vacuum as a result of filling, emptying, or atmospheric temperature changes. Vents for
storage of Class II or IIIA liquids shall
be isolated or separated from ignition
sources.
(c) At permanent storage areas for
combustible liquids, means shall be
provided for confinement or removal of
the contents of the largest storage
tank in the event of tank rupture.
(d) All piping, valves, and fittings
shall be:
(1) Capable of withstanding working
pressures and stresses;
(2) Compatible with the type of liquid
stored; and
(3) Maintained in a manner which
prevents leakage.
§ 57.4463 Liquefied petroleum gas use
underground.
Use of liquefied petroleum gases underground shall be limited to maintenance work.
INSTALLATION/CONSTRUCTION/
MAINTENANCE
§ 57.4500 Heat sources.
Heat sources capable of producing
combustion shall be separated from
combustible materials if a fire hazard
could be created.
kpayne on VMOFRWIN702 with $$_JOB
§ 57.4501 Fuel lines.
Fuel lines shall be equipped with
valves capable of stopping the flow of
fuel at the source and shall be located
and maintained to minimize fire hazards. This standard does not apply to
fuel lines on self-propelled equipment.
§ 57.4502 Battery-charging stations.
(a) Battery-charging stations shall be
ventilated with a sufficient volume of
air to prevent the accumulation of hydrogen gas.
(b) Smoking, use of open flames, or
other activities that could create an ignition source shall be prohibited at the
battery charging station during battery charging.
(c) Readily visible signs prohibiting
smoking or open flames shall be posted
at battery-charging stations during
battery charging.
§ 57.4503 Conveyor belt slippage.
(a) Surface belt conveyors within
confined areas where evacuation would
be restricted in the event of a fire resulting from belt-slippage shall be
equipped with a detection system capable of automatically stopping the drive
pulley.
(b) Underground belt conveyors shall
be equipped with a detection system
capable of automatically stopping the
drive pulley if slippage could cause ignition of the belt.
(c) A person shall attend the belt at
the drive pulley when it is necessary to
operate the conveyor while temporarily bypassing the automatic function.
§ 57.4504 Fan installations.
(a) Fan houses, fan bulkheads for
main and booster fans, and air ducts
connecting main fans to underground
openings shall be constructed of noncombustible materials.
(b) Areas within 25 feet of main fans
or booster fans shall be free of combustible materials, except installed wiring,
ground
and
track
support,
headframes, and direct-fired heaters.
Other timber shall be coated with one
inch of shotcrete, one-half inch of gunite, or other noncombustible materials.
§ 57.4505 Fuel lines to underground
areas.
Fuel lines into underground storage
or dispensing areas shall be drained at
the completion of each transfer of fuel
unless the following requirements are
met:
(a) The valve at the supply source
shall be kept closed when fuel is not
being transferred.
(b) The fuel line shall be—
(1) Capable of withstanding working
pressures and stresses;
(2) Located to prevent damage; and
(3) Located in areas free of combustible materials or in areas where any
exposed combustible materials are
coated with one inch of shotcrete, onehalf inch of gunite, or other noncombustible material with equivalent
fire protection characteristics.
(c) Provisions shall be made for control or containment of the entire volume of the fuel line so that leakage
will not create a fire hazard.
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Mine Safety and Health Admin., Labor
§ 57.4600
§ 57.4530 Exits for surface buildings
and structures.
(c) Provided with an automatic fire
suppression system; or
(d) Covered on all combustible interior and exterior structural surfaces
with noncombustible material or limited combustible material, such as fiveeighth inch, type ‘‘X’’ gypsum wallboard.
Surface buildings or structures in
which persons work shall have a sufficient number of exits to permit prompt
escape in case of fire.
§ 57.4531 Surface flammable or combustible liquid storage buildings or
rooms.
(a) Surface storage buildings or storage rooms in which flammable or combustible liquids, including grease, are
stored and that are within 100 feet of
any person’s work station shall be ventilated with a sufficient volume of air
to prevent the accumulation of flammable vapors.
(b) In addition, the buildings or
rooms shall be—
(1) Constructed to meet a fire resistance rating of at least one hour; or
(2) Equipped with an automatic fire
supression system; or
(3) Equipped with an early warning
fire detection device that will alert any
person who could be endangered by a
fire, provided that no person’s work
station is in the building.
(c) Flammable or combustible liquids
in use for day-to-day maintenance and
operational activities are not considered in storage under this standard.
§ 57.4532
Blacksmith shops.
Blacksmith shops located on the surface shall be—
(a) At least 100 feet from fan installations used for intake air and mine
openings;
(b) Equipped with exhaust vents over
the forge and ventilated to prevent the
accumulation of the products of combustion; and
(c) Inspected for smoldering fires at
the end of each shift.
kpayne on VMOFRWIN702 with $$_JOB
§ 57.4533
Mine opening vicinity.
Surface buildings or other similar
structures within 100 feet of mine openings used for intake air or within 100
feet of mine openings that are designated escapeways in exhaust air shall
be—
(a) Constructed of noncombustible
materials; or
(b) Constructed to meet a fire resistance rating of no less than one hour; or
§ 57.4560
Mine entrances.
For at least 200 feet inside the mine
portal or collar timber used for ground
support in intake openings and in exhaust openings that are designated as
escapeways shall be—
(a) Provided with a fire suppression
system, other than fire extinguishers
and water hoses, capable of controlling
a fire in its early stages; or
(b) Covered with shotcrete, gunite, or
other material with equivalent fire
protection characteristics; or
(c) Coated with fire-retardant paint
or other material to reduce its flame
spread rating to 25 or less and maintained in that condition.
[50 FR 4082, Jan. 29, 1985, as amended at 50
FR 20100, May 14, 1985]
§ 57.4561 Stationary diesel equipment
underground.
Stationary diesel equipment underground shall be—
(a) Supported on a noncombustible
base; and
(b) Provided with a thermal sensor
that automatically stops the engine if
overheating occurs.
WELDING/CUTTING/COMPRESSED GASES
§ 57.4600
Extinguishing equipment.
(a) When welding, cutting, soldering,
thawing, or bending—
(1) With an electric arc or with an
open flame where an electrically conductive extinguishing agent could create an electrical hazard, a multipurpose dry-chemical fire extinguisher or
other extinguisher with at least a 2–
A:10–B:C rating shall be at the worksite.
(2) With an open flame in an area
where no electrical hazard exists, a
multipurpose dry-chemical fire extinguisher or equivalent fire extinguishing equipment for the class of fire
hazard present shall be at the worksite.
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§ 57.4601
30 CFR Ch. I (7–1–19 Edition)
(b) Use of halogenated fire extinguishing agents to meet the requirements of this standard shall be limited
to Halon 1211 (CBrClF2) and Halon 1301
(CBrF3). When these agents are used in
confined or unventilated areas, precautions based on the manufacturer’s
use instructions shall be taken so that
the gases produced by thermal decomposition of the agents are not inhaled.
§ 57.4601 Oxygen cylinder storage.
Oxygen cylinders shall not be stored
in rooms or areas used or designated
for storage of flammable or combustible liquids, including grease.
§ 57.4602 Gauges and regulators.
Gauges and regulators used with oxygen or acetylene cylinders shall be
kept clean and free of oil and grease.
§ 57.4603 Closure of valves.
To prevent accidental release of
gases from hoses and torches attached
to oxygen and acetylene cylinders or to
manifold systems, cylinder or manifold
system valves shall be closed when—
(a) The cylinders are moved;
(b) The torch and hoses are left unattended; or
(c) The task or series of tasks is completed.
kpayne on VMOFRWIN702 with $$_JOB
§ 57.4604 Preparation of pipelines or
containers.
Before welding, cutting, or applying
heat with an open flame to pipelines or
containers that have contained flammable or combustible liquids, flammable gases, or explosive solids, the
pipelines or containers shall be—
(a) Drained, ventilated, and thoroughly cleaned of any residue;
(b) Vented to prevent pressure buildup during the application of heat; and
(c)(1) Filled with an inert gas or
water, where compatible; or
(2) Determined to be free of flammable gases by a flammable gas detection device prior to and at frequent intervals during the application of heat.
§ 57.4660 Work in shafts, raises, or
winzes and other activities involving hazard areas.
During performance of an activity
underground described in Table C–2 or
when falling sparks or hot metal from
work performed in a shaft, raise, or
winze could pose a fire hazard—
(a) A multipurpose dry-chemical fire
extinguisher shall be at the worksite to
supplement the fire extinguishing
equipment required by § 57.4600; and
(b) At least one of the following actions shall be taken:
(1) Wet down the area before and
after the operation, taking precaution
against any hazard of electrical shock.
(2) Isolate any combustible material
with noncombustible material.
(3) Shield the activity so that hot
metal and sparks cannot cause a fire.
(4) Provide a second person to watch
for and extinguish any fire.
TABLE C–2
Activity
Distance
Fire hazard
Welding or cutting
with an electric arc
or open flame
Using an open flame
to bend or heat
materials
Thawing pipes electrically, except with
heat tape
Within 35
feet
of—
Soldering or thawing
with an open flame
Within 10
feet
of—
More than 1 gallon of
combustible liquid, unless in a closed, metal
container.
More than 50 pounds of
non-fire-retardant
wood.
More than 10 pounds of
combustible plastics.
Materials in a shaft, raise,
or winze that could be
ignited by hot metal or
sparks.
(5) Cover or bulkhead the opening immediately below and adjacent to the
activity with noncombustible material
to prevent sparks or hot metal from
falling down the shaft, raise, or winze.
This alternative applies only to activities involving a shaft, raise, or winze.
(c) The affected area shall be inspected during the first hour after the
operation is completed. Additional inspections shall be made or other fire
prevention measures shall be taken if a
fire hazard continues to exist.
VENTILATION CONTROL MEASURES
§ 57.4760
Shaft mines.
(a) Shaft mines shall be provided
with at least one of the following
means to control the spread of fire,
smoke, and toxic gases underground in
the event of a fire: control doors, reversal of mechanical ventilation, or effective evacuation procedures. Under this
standard, ‘‘shaft mine’’ means a mine
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Mine Safety and Health Admin., Labor
§ 57.4760
in which any designated escapeway includes a mechanical hoisting device or
a ladder ascent.
(1) Control doors. If used as an alternative, control doors shall be—
(i) Installed at or near shaft stations
of intake shafts and any shaft designated
as
an
escapeway
under
§ 57.11053 or at other locations that provide equivalent protection;
(ii) Constructed and maintained according to Table C–3;
(iii) Provided with a means of remote
closure at landings of timbered intake
shafts unless a person specifically designated to close each door in the event
of a fire can reach the door within
three minutes;
(iv) Closed or opened only according
to predetermined conditions and procedures;
(v) Constructed so that once closed
they will not reopen as a result of a differential in air pressure;
(vi) Constructed so that they can be
opened from either side by one person,
or be provided with a personnel door
that can be opened from either side;
and
(vii) Clear of obstructions.
(2) Mechanical ventilation reversal. If
used as an alternative, reversal of mechanical ventilation shall—
(i) Provide at all times at least the
same degree of protection to persons
underground as would be afforded by
the installation of control doors;
(ii) Be accomplished by a main fan. If
the main fan is located underground—
(A) The cable or conductors supplying power to the fan shall be routed
through areas free of fire hazards; or
(B) The main fan shall be equipped
with a second, independent power cable
or set of conductors from the surface.
The power cable or conductors shall be
located so that an underground fire disrupting power in one cable or set of
conductors will not affect the other; or
(C) A second fan capable of accomplishing ventilation reversal shall be
available for use in the event of failure
of the main fan;
(iii) Provide rapid air reversal that
allows persons underground time to
exit in fresh air by the second
escapeway or find a place of refuge; and
(iv) Be done according to predetermined conditions and procedures.
(3) Evacuation. If used as an alternative, effective evacuation shall be
demonstrated by actual evacuation of
all persons underground to the surface
in ten minutes or less through routes
that will not expose persons to heat,
smoke, or toxic fumes in the event of a
fire.
(b) If the destruction of any bulkhead
on an inactive level would allow fire
contaminants to reach an escapeway,
that bulkhead shall be constructed and
maintained to provide at least the
same protection as required for control
doors under Table C–3.
kpayne on VMOFRWIN702 with $$_JOB
TABLE C–3—CONTROL DOOR CONSTRUCTION
Location
Minimum required construction
At least 50 feet from: timbered areas, exposed
combustible rock, and any other combustible
material 1
Control door that meets the requirements for a ventilation door in conformance with 30 CFR 57.8531.
Within 50 feet but no closer than 20 feet of: timbered areas, exposed combustible rock, or other
combustible material 1
Within 20 feet of: any timbered areas or combustible rock, provided that the timber and combustible rock within the 20 foot distance are coated
with one inch of shotcrete, one-half inch of gunite, or other material with equivalent fire protection characteristics and no other combustible
material 1 is within that distance
Control door that serves as a barrier to the effects of fire and air leakage.
The control door shall provide protection at least equivalent to a door
constructed of no less than one-quarter inch of plate steel with channel
or angle-iron reinforcement to minimize warpage. The framework assembly of the door and the surrounding bulkhead, if any, shall be at least
equivalent to the door in fire and air-leakage resistance, and in physical
strength.
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§ 57.4761
30 CFR Ch. I (7–1–19 Edition)
TABLE C–3—CONTROL DOOR CONSTRUCTION—Continued
Location
Minimum required construction
Within 20 feet of: timbered areas, exposed combustible rock, or other combustible material 1
Control door that serves as a barrier to fire, the effects of fire, and air-leakage. The door shall provide protection at least equivalent to a door constructed of two layers of wood, each a minimum of three-quarters of an
inch in thickness. The wood grain of one layer shall be perpendicular to
the wood grain of the other layer. The wood construction shall be covered on all sides and edges with no less than twenty-four gauge sheet
steel. The framework assembly of the door and the surrounding bulkhead, if any, shall be at least equivalent to the door in fire and air-leakage resistance, and in physical strength. Roll-down steel doors with a
fire-resistance rating of 11⁄2 hours or greater, but without an insulation
core, are acceptable if an automatic sprinkler or deluge system is installed that provides even coverage of the door on both sides.
1 In
this table, ‘‘combustible material’’ does not refer to installed wiring or track support.
[50 FR 4082, Jan. 29, 1985; 50 FR 20100, May 14, 1985]
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§ 57.4761
Underground shops.
To confine or prevent the spread of
toxic gases from a fire originating in
an underground shop where maintenance work is routinely done on mobile
equipment, one of the following measures shall be taken: use of control
doors or bulkheads, routing of the mine
shop air directly to an exhaust system,
reversal of mechanical ventilation, or
use of an automatic fire suppression
system in conjunction with an alternate escape route. The alternative used
shall at all times provide at least the
same degree of safety as control doors
or bulkheads.
(a) Control doors or bulkheads. If used
as an alternative, control doors or
bulkheads shall meet the following requirements:
(1) Each control door or bulkhead
shall be constructed to serve as a barrier to fire, the effects of fire, and air
leakage at each opening to the shop.
(2) Each control door shall be—
(i) Constructed so that, once closed,
it will not reopen as a result of a differential in air pressure;
(ii) Constructed so that it can be
opened from either side by one person
or be provided with a personnel door
that can be opened from either side;
(iii) Clear of obstructions; and
(iv) Provided with a means of remote
or automatic closure unless a person
specifically designated to close the
door in the event of a fire can reach the
door within three minutes.
(3) If located 20 feet or more from exposed timber or other combustible material, the control doors or bulkheads
shall provide protection at least equivalent to a door constructed of no less
than one-quarter inch of plate steel
with channel or angle-iron reinforcement to minimize warpage. The framework assembly of the door and the surrounding bulkhead, if any, shall be at
least equivalent to the door in fire and
air-leakage resistance, and in physical
strength.
(4) If located less than 20 feet from
exposed timber or other combustibles,
the control door or bulkhead shall provide protection at least equivalent to a
door constructed of two layers of wood,
each a minimum of three-quarters of
an inch in thickness. The wood-grain of
one layer shall be perpendicular to the
wood-grain of the other layer. The
wood construction shall be covered on
all sides and edges with no less than 24gauge sheet steel. The framework assembly of the door and the surrounding
bulkhead, if any, shall be at least
equivalent to the door in fire and airleakage resistance, and in physical
strength. Roll-down steel doors with a
fire-resistance rating of 11⁄2 hours or
greater, but without an insulation
core, are acceptable provided that an
automatic sprinkler or deluge system
is installed that provides even coverage
of the door on both sides.
(b) Routing air to exhaust system. If
used as an alternative, routing the
mine shop exhaust air directly to an
exhaust system shall be done so that
no person would be exposed to toxic
gases in the event of a shop fire.
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Mine Safety and Health Admin., Labor
(c) Mechanical ventilation reversal. If
used as an alternative, reversal of mechanical ventilation shall—
(1) Be accomplished by a main fan. If
the main fan is located underground:
(i) The cable or conductors supplying
power to the fan shall be routed
through areas free of fire hazards; or
(ii) The main fan shall be equipped
with a second, independent power cable
or set of conductors from the surface.
The power cable or conductors shall be
located so that an underground fire disrupting power in one cable or set of
conductors will not affect the other; or
(iii) A second fan capable of accomplishing ventilation reversal shall be
available for use in the event of failure
of the main fan;
(2) Provide rapid air reversal that allows persons underground time to exit
in fresh air by the second escapeway or
find a place of refuge; and
(3) Be done according to predetermined conditions and procedures.
(d) Automatic fire suppression system
and escape route. If used as an alternative, the automatic fire suppression
system and alternate escape route
shall meet the following requirements:
(1) The suppression system shall be—
(i) Located in the shop area;
(ii) The appropriate size and type for
the particular fire hazards involved;
and
(iii) Inspected at weekly intervals
and properly maintained.
(2) The escape route shall bypass the
shop area so that the route will not be
affected by a fire in the shop area.
APPENDIX I TO SUBPART C OF PART 57—
NATIONAL CONSENSUS STANDARDS
Mine operators seeking further information in the area of fire prevention and control may consult the following national consensus standards.
MSHA standard
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§§ 57.4200,
57.4201,
57.4261,
and
57.4262.
National consensus standard
NFPA No. 10—Portable Fire Extinguisher.
NFPA No. 11—Low Expansion Foam and
Combined Agent Systems.
NFPA No. 11A—High Expansion Foam Systems.
NFPA No. 12—Carbon Dioxide Extinguishing
Systems.
NFPA No. 12A—Halon 1301 Extinguishing
Systems.
NFPA No. 13—Water Sprinkler Systems.
NFPA No. 14—Standpipe and Hose Systems.
§ 57.5001
MSHA standard
§ 57.4202 .....
§ 57.4203 .....
§ 57.4230 .....
§ 57.4260 .....
§ 57.4261 .....
§ 57.4533 .....
§ 57.4560 .....
National consensus standard
NFPA No. 15—Water Spray Fixed Systems.
NFPA No. 16—Foam Water Spray Systems.
NFPA No. 17—Dry-Chemical Extinguishing
Systems.
NFPA No. 121—Mobile Surface Mining
Equipment.
NFPA No. 291—Testing and Marking Hydrants.
NFPA No. 1962—Care, Use, and Maintenance of Fire Hose, Connections, and Nozzles.
NFPA No. 14—Standpipe and Hose Systems.
NFPA No. 291—Testing and Marking Hydrants.
NFPA No. 10—Portable Fire Extinguishers.
NFPA No. 10—Portable Fire Extinguishers.
NFPA No. 121—Mobile Surface Mining
Equipment.
NFPA No. 10—Portable Fire Extinguishers.
NFPA No. 14—Standpipe and Hose Systems.
NFPA Fire Protection Handbook.
ASTM E–162—Surface Flammability of Materials Using a Radiant Heat Energy Source.
Subpart D—Air Quality, Radiation,
Physical Agents, and Diesel
Particulate Matter
AIR QUALITY—SURFACE AND
UNDERGROUND
§ 57.5001 Exposure limits for airborne
contaminants.
Except as permitted by § 57.5005—
(a) Except as provided in paragraph
(b), the exposure to airborne contaminants shall not exceed, on the basis of
a time weighted average, the threshold
limit values adopted by the American
Conference of Governmental Industrial
Hygienists, as set forth and explained
in the 1973 edition of the Conference’s
publication, entitled ‘‘TLV’s Threshold
Limit Values for Chemical Substances
in Workroom Air Adopted by ACGIH
for 1973,’’ pages 1 through 54, which are
hereby incorporated by reference and
made a part hereof. This publication
may be obtained from the American
Conference of Governmental Industrial
Hygienists by writing to 1330 Kemper
Meadow Drive, Attn: Customer Service,
Cincinnati,
OH
45240,
http://
www.acgih.org, or may be examined in
any Metal and Nonmetal Mine Safety
and Health District Office of the Mine
Safety and Health Administration. Excursions above the listed thresholds
shall not be of a greater magnitude
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§ 57.5002
30 CFR Ch. I (7–1–19 Edition)
than is characterized as permissible by
the Conference.
(b) Asbestos standard—(1) Definitions.
Asbestos is a generic term for a number of asbestiform hydrated silicates
that, when crushed or processed, separate into flexible fibers made up of
fibrils.
Asbestos
means
chrysotile,
cummingtonite-grunerite
asbestos
(amosite), crocidolite, anthophylite asbestos, tremolite asbestos, and actinolite asbestos.
Asbestos fiber means a fiber of asbestos that meets the criteria of a fiber.
Fiber means a particle longer than 5
micrometers (μm) with a length-to-diameter ratio of at least 3-to-1.
(2)
Permissible
Exposure
Limits
(PELs)—(i) Full-shift limit. A miner’s
personal exposure to asbestos shall not
exceed an 8-hour time-weighted average full-shift airborne concentration of
0.1 fiber per cubic centimeter of air (f/
cc).
(ii) Excursion limit. No miner shall be
exposed at any time to airborne concentrations of asbestos in excess of 1
fiber per cubic centimeter of air (f/cc)
as averaged over a sampling period of
30 minutes.
(3) Measurement of airborne asbestos
fiber concentration. Potential asbestos
fiber concentration shall be determined
by phase contrast microscopy (PCM)
using the OSHA Reference Method in
OSHA’s asbestos standard found in 29
CFR 1910.1001, Appendix A, or a method
at least equivalent to that method in
identifying a potential asbestos exposure exceeding the 0.1 f/cc full-shift
limit or the 1 f/cc excursion limit.
When PCM results indicate a potential
exposure exceeding the 0.1 f/cc fullshift limit or the 1 f/cc excursion limit,
samples shall be further analyzed using
transmission electron microscopy according to NIOSH Method 7402 or a
method at least equivalent to that
method.
(c) Employees shall be withdrawn
from areas where there is present an
airborne contaminant given a ‘‘C’’ designation by the Conference and the
concentration exceeds the threshold
limit value listed for that contaminant.
[50 FR 4082, Jan. 29, 1985, as amended at 60
FR 35695, July 11, 1995; 71 FR 16667, Apr. 3,
2006; 73 FR 11303, Feb. 29, 2008; 73 FR 66172,
Nov. 7, 2008]
§ 57.5002 Exposure monitoring.
Dust, gas, mist, and fume surveys
shall be conducted as frequently as
necessary to determine the adequacy of
control measures.
§ 57.5005 Control of exposure to airborne contaminants.
Control of employee exposure to
harmful airborne contaminants shall
be, insofar as feasible, by prevention of
contamination, removal by exhaust
ventilation, or by dilution with
uncontaminated air. However, where
accepted engineering control measures
have not been developed or when necessary by the nature of work involved
(for example, while establishing controls or occasional entry into hazardous atmospheres to perform maintenance or investigation), employees
may work for reasonable periods of
time in concentrations of airborne contaminants exceeding permissible levels
if they are protected by appropriate
respiratory
protective
equipment.
Whenever respiratory protective equipment is used a program for selection,
maintenance, training, fitting, supervision, cleaning, and use shall meet the
following minimum requirements:
(a) Respirators approved by NIOSH
under 42 CFR part 84 which are applicable and suitable for the purpose intended shall be furnished and miners
shall use the protective equipment in
accordance with training and instruction.
(b) A respirator program consistent
with the requirements of ANSI Z88.2–
1969, published by the American National Standards Institute and entitled
‘‘American National Standards Practices for Respiratory Protection ANSI
Z88.2–1969,’’ approved August 11, 1969,
which is hereby incorporated by reference and made a part hereof. This
publication may be obtained from the
American National Standards Institute, Inc., 25 W. 43rd Street, 4th Floor,
New
York,
NY
10036;
http://
www.ansi.org, or may be examined in
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Mine Safety and Health Admin., Labor
§ 57.5037
any Metal and Nonmetal Mine Safety
and Health District Office of the Mine
Safety and Health Administration.
(c) When respiratory protection is
used in atmospheres immediately
harmful to life, the presence of at least
one other person with backup equipment and rescue capability shall be required in the event of failure of the respiratory equipment.
described in section 14.3 of ANSI N13.8–
1973, entitled ‘‘American National
Standard Radiation Protection in Uranium Mines,’’ approved July 18, 1973,
pages 13–15, by the American National
Standards Institute, Inc., which is incorporated by reference and made a
part of the standard or equivalent procedures and equipment acceptable to
the Administrator, MSHA Metal and
Nonmetal Mine Safety and Health district office. This publication may be
examined at any Metal and Nonmetal
Mine Safety and Health Subdistrict Office of the Mine Safety and Health Administration, or may be obtained from
the American National Standards Institute, Inc., 25 W. 43rd Street, 4th
Floor, New York, NY 10036; http://
www.ansi.org. The mine operator may
request that the required exhaust mine
air sampling be done by the Mine Safety and Health Administration. If concentrations of radon daughters in excess of 0.1 WL are found in an exhaust
air sample, thereafter—
(1) Where uranium is mined—radon
daughter concentrations representative
of worker’s breathing zone shall be determined at least every two weeks at
random times in all active working
areas such as stopes, drift headings,
travelways, haulageways, shops, stations, lunch rooms, magazines, and any
other place or location where persons
work, travel, or congregate. However,
if concentrations of radon daughters
are found in excess of 0.3 WL in an active working area, radon daughter concentrations thereafter shall be determined weekly in that working area
until such time as the weekly determinations in that area have been 0.3
WL or less for 5 consecutive weeks.
(2) Where uranium is not mined—
when radon daughter concentrations
between 0.1 and 0.3 WL are found in an
active working area, radon daughter
concentration
measurements
representative of worker’s breathing zone
shall be determined at least every 3
months at random times until such
time as the radon daughter concentrations in that area are below 0.1 WL, and
annually thereafter. If concentrations
of radon daughters are found in excess
of 0.3 WL in an active working area
radon daughter concentrations thereafter shall be determined at least
[50 FR 4082, Jan. 29, 1985, as amended at 60
FR 30400, June 8, 1995; 60 FR 33723, June 29,
1995; 60 FR 35695, July 11, 1995; 71 FR 16667,
Apr. 3, 2006]
§ 57.5006 Restricted use of chemicals.
The following chemical substances
shall not be used or stored except by
competent persons under laboratory
conditions approved by a nationally
recognized agency acceptable to the
Secretary.
(a) Carbon tetrachloride,
(b) Phenol,
(c) 4-Nitrobiphenyl,
(d) Alpha-naphthylamine,
(e)
4,4-Methylene
Bis
(2chloroaniline),
(f) Methyl-chloromethyl ether,
(g) 3,3 Dichlorobenzidine,
(h) Bis (chloromethyl) ether,
(i) Beta-napthylamine,
(j) Benzidine,
(k) 4-Aminodiphenyl,
(l) Ethyleneimine,
(m) Beta-propiolactone,
(n) 2-Acetylaminofluorene,
(o) 4-Dimethylaminobenzene, and
(p) N-Nitrosodimethylamine.
AIR QUALITY—SURFACE ONLY
[RESERVED]
AIR QUALITY—UNDERGROUND ONLY
§ 57.5015 Oxygen deficiency.
Air in all active workings shall contain at least 19.5 volume percent oxygen.
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RADIATION—UNDERGROUND ONLY
§ 57.5037 Radon daughter exposure
monitoring.
(a) In all mines at least one sample
shall be taken in exhaust mine air by a
competent person to determine if concentrations of radon daughters are
present. Sampling shall be done using
suggested equipment and procedures
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§ 57.5038
30 CFR Ch. I (7–1–19 Edition)
weekly in that working area until such
time as the weekly determinations in
that area have been 0.3 WL or less for
5 consecutive weeks.
(b) If concentrations of radon daughters less than 0.1 WL are found in an
exhaust mine air sample, thereafter:
(1) Where uranium is mined—at least
one sample shall be taken in the exhaust mine air monthly.
(2) Where uranium is not mined—no
further exhaust mine air sampling is
required.
(c) The sample date, locations, and
results obtained under (a) and (b) above
shall be recorded and retained at the
mine site or nearest mine office for at
least two years and shall be made
available for inspection by the Secretary or his authorized representative.
[50 FR 4082, Jan. 29, 1985, as amended at 60
FR 33723, June 29, 1995; 71 FR 16667, Apr. 3,
2006]
§ 57.5038 Annual exposure limits.
No person shall be permitted to receive an exposure in excess of 4 WLM in
any calendar year.
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§ 57.5039 Maximum permissible concentration.
Except as provided by standard
§ 57.5005, persons shall not be exposed to
air containing concentrations of radon
daughters exceeding 1.0 WL in active
workings.
§ 57.5040 Exposure records.
(a) The operator shall calculate and
record complete individual exposures
to concentrations of radon daughters
as follows:
(1) Where uranium is mined—the
complete individual exposures of all
mine personnel working underground
shall be calculated and recorded. These
records shall include the individual’s
time in each active working area such
as stopes, drift headings, travelways,
haulageways, shops, stations, lunch
rooms, magazines and any other place
or location where persons work, travel
or congregate, and the concentration of
airborne radon daughters for each active working area.
(2) Where uranium is not mined—the
complete individual exposure of all
mine personnel working in active
working areas with radon daughter
concentrations in excess of 0.3 WL shall
be calculated and recorded. These
records shall include the individual’s
time in each active working area and
the concentrations of airborne radon
daughters for each active working
area. The operator may discontinue
calculating and recording the individual exposures of any personnel assigned to work in active working areas
where radon daughter concentrations
have been reduced to 0.3 WL or less for
5 consecutive weeks provided that such
exposure calculation and recordation
shall not be discontinued with respect
to any person who has accumulated
more exposure than 1⁄12 (one-twelfth) of
a WLM times the number of months for
which exposures have been calculated
and recorded in the calendar year in
which the exposure calculation and
recordation is proposed to be discontinued.
(b) The operator shall maintain the
form entitled ‘‘Record of Individual Exposure to Radon Daughters’’ (Form
4000–9), or equivalent forms that are acceptable to the Administrator, Metal
and Nonmetal Mine Safety and Health,
Mine Safety and Health Administration, on which there shall be recorded
the specific information required by
the form with respect to each person’s
time-weighted current and cumulative
exposure to concentrations of radon
daughters.
(1) The form entitled ‘‘Record of Individual Exposure to Radon Daughters’’
(Form 4000–9), shall consist of an original of each form for the operator’s
records which shall be available for examination by the Secretary or his authorized representative.
(2) On or before February 15 of each
calendar year, or within 45 days after
the shutdown of mining operations for
the calendar year, each mine operator
shall submit to the Mine Safety and
Health Administration a copy of the
‘‘Record of Individual Exposure to
Radon Daughters’’ (Form 4000–9), or acceptable equivalent form, showing the
data required by the form for all personnel for whom calculation and recording of exposure was required during the previous calendar year.
(3) Errors detected by the operator
shall be corrected on any forms kept by
the operator and a corrected copy of
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Mine Safety and Health Admin., Labor
§ 57.5046
any forms submitted to the Mine Safety and Health Administration shall be
submitted to the Mine Safety and
Health Administration within 60 days
of detection and shall identify the errors and indicate the date the corrections are made.
(4) The operator’s records of individual exposure to concentrations of
radon daughters and copies of ‘‘Record
of Individual Exposure to Radon
Daughters’’ (Form 4000–9) or acceptable
equivalent form or true legible facsimiles thereof (microfilm or other),
shall be retained at the mine or nearest
mine office for a period as specified in
paragraph 9.8, ANSI N13.8–1973, or shall
be submitted to the Mine Safety and
Health Administration. These records,
if retained by the operator, shall be
open for inspection by the Secretary of
Labor, his authorized representative,
and authorized representatives of the
official mine inspection agency of the
State in which the mine is located.
Paragraph 9.8, ANSI N13.8–1973, is incorporated by reference and made a
part of this standard. ANSI N13.8–1973
may be examined at any Metal and
Nonmetal Mine Safety and Health District Office of the Mine Safety and
Health Administration, and may be obtained from the American National
Standards Institute, Inc., at 25 W. 43rd
Street, 4th Floor, New York, NY 10036;
http://www.ansi.org.
(5) Upon written request from a person who is a subject of these records, a
statement of the year-to-date and cumulative exposure applicable to that
person shall be provided to the person
or to whomever such person designates.
(6) The blank form entitled ‘‘Record
of Individual Exposure to Radon
Daughters’’ (Form 4000–9) may be obtained on request from any MSHA
Metal and Nonmetal Mine Safety and
Health district office.
sampling results for that working area during the time that persons are present. Any
sample taken by Federal or State mine inspectors, which represents exposure to miners and reported to the operator within three
days of being taken, shall be included in the
average concentration; except that if the
mine operator samples simultaneously with
the inspector, he may use his own sample results.
NOTE: To calculate an individual’s exposure to WLM for a given period of time, multiply the total exposure time (hours to the
nearest half-hour) in an active working area
by the average concentration of airborne
radon daughters for the applicable active
working area (average working level calculated to the nearest hundredth working
level) and divide the product by the constant
173 hours per month.
An average airborne radon daughter concentration for a designated active working
area shall be determined by averaging all
[50 FR 4082, Jan. 29, 1985, as amended at 60
FR 33723, June 29, 1995; 60 FR 35695, July 11,
1995; 71 FR 16667, Apr. 3, 2006]
§ 57.5041 Smoking prohibition.
Smoking shall be prohibited in all
areas of a mine where exposure records
are required to be kept in compliance
with standard 57.5040.
§ 57.5042 Revised exposure levels.
If levels of permissible exposures to
concentrations of radon daughters different from those prescribed in 57.5038
are recommended by the Environmental Protection Agency and approved by the President, no employee
shall be permitted to receive exposures
in excess of those levels after the effective dates established by the Agency.
§ 57.5044 Respirators.
In environments exceeding 1.0 WL,
miners shall wear respirators approved
by NIOSH for radon daughters prior to
July 10, 1995 or under the equivalent
section of 42 CFR part 84 and such respirator use shall be in compliance with
§ 57.5005.
[60 FR 30400, June 8, 1995]
§ 57.5045 Posting of inactive workings.
Inactive workings in which radon
daughter concentrations are above 1.0
WL, shall be posted against unauthorized entry and designated by signs indicating them as areas in which approved
respirators shall be worn.
§ 57.5046 Protection against radon gas.
Where radon daughter concentrations
exceed 10 WL, respirator protection
against radon gas shall be provided in
addition to protection against radon
daughters. Protection against radon
gas shall be provided by supplied air
devices or by face masks containing
absorbent material capable of removing both the radon and its daughters.
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§ 57.5047
30 CFR Ch. I (7–1–19 Edition)
§ 57.5047 Gamma radiation surveys.
(a) Gamma radiation surveys shall be
conducted annually in all underground
mines where radioactive ores are
mined.
(b) Surveys shall be in accordance
with American National Standards
(ANSI) Standard N13.8–1973, entitled
‘‘Radiation Protection in Uranium
Mines’’, section 14.1 page 12, which is
hereby incorporated by reference and
made a part hereof. This publication
may be examined in any Metal and
Nonmetal Mine Safety and Health District Office, Mine Safety and Health
Administration, or may be obtained
from the American National Standards
Institute, Inc., 25 W. 43rd Street, 4th
Floor, New York, NY 10036; http://
www.ansi.org.
(c) Where average gamma radiation
measurements are in excess of 2.0
milliroentgens per hour in the working
place, gamma radiation dosimeters
shall be provided for all persons affected, and records of cumulative individual gamma radiation exposure shall
be kept.
(d) Annual individual gamma radiation exposure shall not exceed 5 rems.
[50 FR 4082, Jan. 29, 1985, as amended at 60
FR 33723, June 29, 1995; 60 FR 35695, July 11,
1995; 71 FR 16667, Apr. 3, 2006]
DIESEL PARTICULATE MATTER—
UNDERGROUND ONLY
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SOURCE: 66 FR 5907, Jan. 19, 2001, unless
otherwise noted.
§ 57.5060 Limit on exposure to diesel
particulate matter.
(a) A miner’s personal exposure to
diesel particulate matter (DPM) in an
underground mine must not exceed an
average eight-hour equivalent full shift
airborne
concentration
of
308
micrograms of elemental carbon per
cubic meter of air (308EC μg/m3). [This
interim permissible exposure limit
(PEL) remains in effect until the final
DPM exposure limit becomes effective.
When the final DPM exposure limit becomes effective, MSHA will publish a
document in the FEDERAL REGISTER.]
(b)(1) Effective May 20, 2006, a miner’s
personal exposure to diesel particulate
matter (DPM) in an underground mine
must not exceed an average eight-hour
equivalent full shift airborne concentration of 308 micrograms of elemental carbon per cubic meter of air
(308EC μg/m3).
(2) Effective January 20, 2007, a miner’s personal exposure to diesel particulate matter (DPM) in an underground
mine must not exceed an average
eight-hour equivalent full shift airborne concentration of 350 micrograms
of total carbon per cubic meter of air
(350TC μg/m3).
(3) Effective May 20, 2008, a miner’s
personal exposure to diesel particulate
matter (DPM) in an underground mine
must not exceed an average eight-hour
equivalent full shift airborne concentration of 160 micrograms of total
carbon per cubic meter of air (160TC μg/
m3).
(c)(1) If a mine requires additional
time to come into compliance with the
final DPM limit established in § 57.5060
(b) due to technological or economic
constraints, the operator of the mine
may file an application with the District Manager for a special extension.
(2) The mine operator must certify on
the application that the operator has
posted one copy of the application at
the mine site for at least 30 days prior
to the date of application, and has provided another copy to the authorized
representative of miners.
(3) No approval of a special extension
shall exceed a period of one year from
the date of approval. Mine operators
may file for additional special extensions provided each extension does not
exceed a period of one year. An application must include the following information:
(i) Documentation supporting that
controls are technologically or economically infeasible at this time to reduce the miner’s exposure to the final
DPM limit.
(ii) The most recent DPM monitoring
results.
(iii) The actions the operator will
take during the extension to minimize
exposure of miners to DPM.
(4) A mine operator must comply
with the terms of any approved application for a special extension, post a
copy of the approved application for a
special extension at the mine site for
the duration of the special extension
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Mine Safety and Health Admin., Labor
§ 57.5061
period, and provide a copy of the approved application to the authorized
representative of miners.
(d) The mine operator must install,
use, and maintain feasible engineering
and administrative controls to reduce a
miner’s exposure to or below the applicable DPM PEL established in this section. When controls do not reduce a
miner’s DPM exposure to the PEL, controls are infeasible, or controls do not
produce significant reductions in DPM
exposures, controls must be used to reduce the miner’s exposure to as low a
level as feasible and must be supplemented with respiratory protection in
accordance with § 57.5005(a), (b), and
paragraphs (d)(1) through (d)(8) of this
section.
(1) Air purifying respirators must be
equipped with the following:
(i) Filters certified by NIOSH under
30 CFR part 11 (appearing in the July 1,
1994 edition of 30 CFR, parts 1 to 199) as
a high efficiency particulate air
(HEPA) filter;
(ii) Filters certified by NIOSH under
42 CFR part 84 as 99.97% efficient; or
(iii) Filters certified by NIOSH for
DPM.
(2) Non-powered, negative-pressure,
air purifying, particulate-filter respirators shall use an R- or P-series filter or any filter certified by NIOSH for
DPM. An R-series filter shall not be
used for longer than one work shift.
(3) The mine operator must provide a
confidential medical evaluation by a
physician or other licensed health care
professional (PLHCP), at no cost to the
miner, to determine the miner’s ability
to use a respirator before the miner is
required to be fit tested or to use a respirator at the mine. If the PLHCP determines that the miner cannot wear a
negative pressure respirator, the mine
operator must make certain that the
PLHCP evaluates the miner’s ability to
wear a powered air purifying respirator
(PAPR).
(4) The mine operator must provide
the miner with an opportunity to discuss their evaluation results with the
PLHCP before the PLHCP submits the
written determination to the mine operator regarding the miner’s ability to
wear a respirator. If the miner disagrees with the evaluation results of
the PLHCP, the miner may submit
within 30 days additional evidence of
his or her medical condition to the
PLHCP.
(5) The mine operator must obtain a
written
determination
from
the
PLHCP regarding the miner’s ability
to wear a respirator, and the mine operator must assure that the PLHCP
provides a copy of the determination to
the miner.
(6) The miner must be reevaluated
when the mine operator has reason to
believe that conditions have changed
which could adversely affect the miner’s ability to wear the respirator.
(7) Upon written notification that the
PLHCP has determined that the miner
is unable to wear a respirator, including a PAPR, the miner must be transferred to work in an existing position
in an area of the same mine where respiratory protection is not required.
The miner must be transferred within
30 days of the final determination by
the PLHCP.
(i) The miner must continue to receive compensation at no less than the
regular rate of pay in the classification
held by that miner immediately prior
to the transfer.
(ii) Increases in wages of the transferred miner must be based upon the
new work classification.
(8) The mine operator must maintain
a record of the identity of the PLHCP
and the most recent written determination of each miner’s ability to
wear a respirator for the duration of
the miner’s employment plus six
months.
(e) Rotation of miners shall not be
considered an acceptable administrative control used for compliance with
the DPM standard.
[70 FR 32966, June 6, 2005; 70 FR 37901, June
30, 2005, as amended at 70 FR 55019, Sept. 19,
2005; 71 FR 29011, 29012, May 18, 2006; 71 FR
36483, June 27, 2006]
§ 57.5061
Compliance determinations.
(a) MSHA will use a single sample
collected and analyzed by the Secretary in accordance with the requirements of this section as an adequate
basis for a determination of noncompliance with the DPM limit.
(b) The Secretary will collect samples of DPM by using a respirable dust
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§ 57.5065
30 CFR Ch. I (7–1–19 Edition)
sampler equipped with a submicrometer impactor and analyze the samples
for the amount of elemental carbon
using the method described in NIOSH
Analytical Method 5040, except that
the Secretary also may use any methods of collection and analysis subsequently determined by NIOSH to provide equal or improved accuracy for
the measurement of DPM.
(c) The Secretary will use full-shift
personal sampling for compliance determinations.
[70 FR 32966, June 6, 2005]
§ 57.5065 Fueling practices.
(a) Diesel fuel used to power equipment in underground areas must not
have a sulfur content greater than 0.05
percent. The operator must retain purchase records that demonstrate compliance with this requirement for one
year after the date of purchase.
(b) The operator must only use fuel
additives registered by the U.S. Environmental Protection Agency in diesel
powered equipment operated in underground areas.
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[66 FR 5907, Jan. 19, 2001; 66 FR 35520, July 5,
2001]
§ 57.5066 Maintenance standards.
(a) Any diesel powered equipment operated at any time in underground
areas must meet the following maintenance standards:
(1) The operator must maintain any
approved engine in approved condition;
(2) The operator must maintain the
emission related components of any
non-approved engine to manufacturer
specifications; and
(3) The operator must maintain any
emission or particulate control device
installed on the equipment in effective
operating condition.
(b)(1) A mine operator must authorize each miner operating diesel-powered equipment underground to affix a
visible and dated tag to the equipment
when the miner notes evidence that the
equipment may require maintenance in
order to comply with the maintenance
standards of paragraph (a) of this section. The term evidence means visible
smoke or odor that is unusual for that
piece of equipment under normal operating procedures, or obvious or visible
defects in the exhaust emissions control system or in the engine affecting
emissions.
(2) A mine operator must ensure that
any equipment tagged pursuant to this
section is promptly examined by a person authorized to maintain diesel
equipment, and that the affixed tag not
be removed until the examination has
been completed. The term promptly
means before the end of the next shift
during which a qualified mechanic is
scheduled to work.
(3) A mine operator must retain a log
of any equipment tagged pursuant to
this section. The log must include the
date the equipment is tagged, the date
the equipment is examined, the name
of the person examining the equipment, and any action taken as a result
of the examination. The operator must
retain the information in the log for
one year after the date the tagged
equipment was examined.
(c) Persons authorized by a mine operator to maintain diesel equipment
covered by paragraph (a) of this section
must be qualified, by virtue of training
or experience, to ensure that the maintenance standards of paragraph (a) of
this section are observed. An operator
must retain appropriate evidence of the
competence of any person to perform
specific maintenance tasks in compliance with those standards for one year
after the date of any maintenance, and
upon request must provide the documentation to the authorized representative of the Secretary.
[66 FR 5907, Jan. 19, 2001, as amended at 67
FR 9184, Feb. 27, 2002]
EFFECTIVE DATE NOTE: At 66 FR 5907, Jan.
19, 2001, § 57.5066 was added, effective July 5,
2001, except for paragraph (b). At 66 FR 35518,
July 5, 2001, the effective date of paragraph
(b) was delayed pending disposition of current litigation challenging the rule. At 67 FR
9184, Feb. 27, 2002, paragraphs (b)(1) and (b)(2)
were revised, effective Mar. 29, 2002.
§ 57.5067
Engines.
(a) Any diesel engine introduced into
an underground area of a mine covered
by this part after July 5, 2001, other
than an engine in an ambulance or fire
fighting equipment which is utilized in
accordance with mine fire fighting and
evacuation plans, must either:
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Mine Safety and Health Admin., Labor
§ 57.5071
(1) Have affixed a plate evidencing
approval of the engine pursuant to subpart E of Part 7 of this title or pursuant to Part 36 of this title; or
(2) Meet or exceed the applicable particulate matter emission requirements
of the Environmental Protection Administration listed in Table 57.5067–1,
as follows:
TABLE 57.5067–1
EPA requirement
40
40
40
40
CFR
CFR
CFR
CFR
EPA category
86.094–8(a)(1)(i)(A)(2) .................
86.094–9(a)(1)(i)(A)(2) .................
86.094–11(a)(1)(iv)(B) .................
89.112(a) ......................................
...............................................................
...............................................................
...............................................................
...............................................................
...............................................................
...............................................................
...............................................................
...............................................................
PM limit
light duty vehicle ......................................
light duty truck .........................................
heavy duty highway engine .....................
nonroad (tier, power range) ....................
tier 1 kW<8 (hp<11) ................................
tier 1 8≤kW<19 (11≤hp<25) ....................
tier 1 19≤kW<37 (25≤hp<50) ..................
tier 2 37≤kW<75 (50≤hp<100) ................
tier 2 75≤kW<130 (100≤hp<175) ............
tier 1 130≤kW<225 (175≤hp<300) ..........
tier 1 225≤kW<450 (300≤hp<600) ..........
tier 1 450≤kW<560 (600≤hp<750) ..........
tier 1 kW≥560 (hp≥750) ..........................
0.1 g/mile.
0.1 g/mile.
0.1 g/bhp-hr.
varies by power range:
1.0 g/kW-hr (0.75 g/bhp-hr).
0.80 g/kW-hr (0.60 g/bhp-hr).
0.80 g/kW-hr (0.60 g/bhp-hr).
0.40 g/kW-hr (0.30 g/bhp-hr).
0.30 g/kW-hr (0.22 g/bhp-hr).
0.54 g/kW-hr (0.40 g/bhp-hr).
0.54 g/kW-hr (0.40 g/bhp-hr).
0.54 g/kW-hr (0.40 g/bhp-hr).
0.54 g/kW-hr (0.40 g/bhp-hr).
NOTES:
‘‘g’’ means grams.
‘‘hp’’ means horsepower.
‘‘g/bhp-hr’’ means grams/brake horsepower-hour.
‘‘kW’’ means kilowatt.
‘‘g/kW-hr’’ means grams/kilowatt-hour.
(b) For purposes of paragraph (a):
(1) The term ‘‘introduced’’ means any
engine added to the underground inventory of engines of the mine in question,
including:
(i) An engine in newly purchased
equipment;
(ii) An engine in used equipment
brought into the mine; and
(iii) A replacement engine that has a
different serial number than the engine
it is replacing; but
(2) The term ‘‘introduced’’ does not
include engines that were previously
part of the mine inventory and rebuilt.
(3) The term introduced does not include the transfer of engines or equipment from the inventory of one underground mine to another underground
mine operated by the same mine operator.
[66 FR 5907, Jan. 19, 2001, as amended at 66
FR 27864, May 21, 2001; 67 FR 9184, Feb. 27,
2002]
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§ 57.5070
Miner training.
(a) Mine operators must provide annual training to all miners at a mine
covered by this part who can reasonably be expected to be exposed to diesel
emissions on that property. The training must include—
(1) The health risks associated with
exposure to diesel particulate matter;
(2) The methods used in the mine to
control diesel particulate matter concentrations;
(3) Identification of the personnel responsible for maintaining those controls; and
(4) Actions miners must take to ensure the controls operate as intended.
(b) An operator must retain a record
at the mine site of the training required by this section for one year
after completion of the training.
§ 57.5071
Exposure monitoring.
(a) Mine operators must monitor as
often as necessary to effectively determine, under conditions that can be reasonably anticipated in the mine,
whether the average personal full-shift
airborne exposure to DPM exceeds the
DPM limit specified in § 57.5060.
(b) The mine operator must provide
affected miners and their representatives with an opportunity to observe
exposure monitoring required by this
section. Mine operators must give prior
notice to affected miners and their representatives of the date and time of intended monitoring.
(c) If any monitoring performed
under this section indicates that a
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§ 57.5075
30 CFR Ch. I (7–1–19 Edition)
miner’s exposure to diesel particulate
matter exceeds the DPM limit specified
in § 57.5060, the operator must promptly
post notice of the corrective action
being taken on the mine bulletin
board, initiate corrective action by the
next work shift, and promptly complete such corrective action.
(d)(1) The results of monitoring for
diesel particulate matter, including
any results received by a mine operator
from sampling performed by the Secretary, must be posted on the mine bulletin board within 15 days of receipt
and must remain posted for 30 days.
The operator must provide a copy of
the results to the authorized representative of miners.
(2) The mine operator must retain for
five years (from the date of sampling),
the results of any samples the operator
collected as a result of monitoring
under this section, and information
about the sampling method used for obtaining the samples.
[70 FR 32966, June 6, 2005]
§ 57.5075
Diesel particulate records.
(a) The table entitled ‘‘Diesel Particulate Matter Recordkeeping Requirements’’ lists the records the operator
must maintain pursuant to §§ 57.5060
through 57.5071, and the duration for
which particular records need to be retained.
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TABLE 57.5075(a)—DIESEL PARTICULATE RECORDKEEPING REQUIREMENTS
Record
Section
reference
1. Approved application for extension of time to
comply with exposure limits.
2. Identity of PLHCP and most recent written determination of miner’s ability to wear a respirator.
3. Purchase records noting sulfur content of diesel
fuel.
4. Maintenance log ..................................................
5. Evidence of competence to perform maintenance.
6. Annual training provided to potentially exposed
miners.
7. Record of corrective action .................................
8. Sampling method used to effectively evaluate a
miner’s personal exposure, and sample results.
§ 57.5060(c) ...............
Duration of extension.
§ 57.5060(d) ...............
Duration of miner’s employment plus 6 months.
§ 57.5065(a) ...............
1 year beyond date of purchase.
§ 57.5066(b) ...............
§ 57.5066(c) ...............
1 year after date any equipment is tagged.
1 year after date maintenance performed.
§ 57.5070(b) ...............
1 year beyond date training completed.
§ 57.5071(c) ...............
§ 57.5071(d) ...............
Until the corrective action is completed.
5 years from sample date.
(b)(1) Any record listed in this section which is required to be retained at
the mine site may, notwithstanding
such requirement, be retained elsewhere if the mine operator can immediately access the record from the
mine site by electronic transmission.
(2) Upon request from an authorized
representative of the Secretary of
Labor, the Secretary of Health and
Human Services, or from the authorized representative of miners, mine operators must promptly provide access
to any record listed in the table in this
section.
(3) An operator must provide access
to a miner, former miner, or, with the
miner’s or former miner’s written consent, a personal representative of a
miner, to any record required to be
maintained pursuant to § 57.5071 or
§ 57.5060(d) to the extent the information pertains to the miner or former
Retention time
miner. The operator must provide the
first copy of a requested record at no
cost, and any additional copies at reasonable cost.
(4) Whenever an operator ceases to do
business, that operator must transfer
all records required to be maintained
by this part, or a copy thereof, to any
successor operator who must maintain
them for the required period.
[70 FR 32966, June 6, 2005; 70 FR 37901, June
30, 2005; 71 FR 29012, May 18, 2006]
Subpart E—Explosives
SOURCE: 61 FR 36801, July 12, 1996, unless
otherwise noted.
§ 57.6000
Definitions.
The following definitions apply in
this subpart.
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Mine Safety and Health Admin., Labor
§ 57.6102
Blasting agent. Any substance classified as a blasting agent by the Department of Transportation in 49 CFR
173.114a(a). This document is available
at any MSHA Metal and Nonmetal
Safety and Health district office.
Detonating cord. A flexible cord containing a center core of high explosives
which may be used to initiate other explosives.
Detonator. Any device containing a
detonating charge used to initiate an
explosive. These devices include electric or nonelectric instantaneous or
delay blasting caps, and delay connectors. The term ‘‘detonator’’ does not
include detonating cord. Detonators
may be either ‘‘Class A’’ detonators or
‘‘Class C’’ detonators, as classified by
the Department of Transportation in 49
CFR 173.53, and 173.100. This document
is available at any MSHA Metal and
Nonmetal Safety and Health district
office.
Explosive. Any substance classified as
an explosive by the Department of
Transportation in 49 CFR 173.53, 173.88,
and 173.100. This document is available
at any MSHA Metal and Nonmetal
Safety and Health district office.
Explosive material. Explosives, blasting agents, and detonators.
Flash point. The minimum temperature at which sufficient vapor is released by a liquid to form a flammable
vapor-air mixture near the surface of
the liquid.
Igniter cord. A fuse that burns progressively along its length with an external flame at the zone of burning,
used for lighting a series of safety fuses
in a desired sequence.
Magazine. A bullet-resistant, theftresistant, fire-resistant, weather-resistant, ventilated facility for the storage of explosives and detonators (BATF
Type 1 or Type 2 facility).
Misfire. The complete or partial failure of explosive material to detonate
as planned. The term also is used to describe the explosive material itself
that has failed to detonate.
Primer. A unit, package, or cartridge
of explosives which contains a detonator and is used to initiate other explosives or blasting agents.
Safety switch. A switch that provides
shunt protection in blasting circuits
between the blast site and the switch
used to connect a power source to the
blasting circuit.
Slurry. An explosive material containing substantial portions of a liquid,
oxidizers, and fuel, plus a thickener.
Water gel. An explosive material containing substantial portions of water,
oxidizers, and fuel, plus a cross-linking
agent.
[61 FR 36801, July 12, 1996, as amended at 67
FR 38385, June 4, 2002; 68 FR 32361, May 30,
2003; 69 FR 38842, June 29, 2004]
STORAGE—SURFACE AND UNDERGROUND
§ 57.6100 Separation of stored explosive material.
(a) Detonators shall not be stored in
the same magazine with other explosive material.
(b) When stored in the same magazine, blasting agents shall be separated
from explosives, safety fuse, and detonating cord to prevent contamination.
§ 57.6101 Areas around explosive material storage facilities.
(a) Areas surrounding storage facilities for explosive material shall be
clear of rubbish, brush, dry grass, and
trees for 25 feet in all directions, except
that live trees 10 feet or taller need not
be removed.
(b) Other combustibles shall not be
stored or allowed to accumulate within
50 feet of explosive material. Combustible liquids shall be stored in a manner that ensures drainage will occur
away from the explosive material storage facility in case of tank rupture.
§ 57.6102 Explosive material storage
practices.
(a) Explosive material shall be—
(1) Stored in a manner to facilitate
use of oldest stocks first;
(2) Stored according to brand and
grade in such a manner as to facilitate
identification; and
(3) Stacked in a stable manner but
not more than 8 feet high.
(b) Explosives and detonators shall be
stored in closed nonconductive containers except that nonelectric detonating devices may be stored on nonconductive racks provided the case-insert instructions and the date-plantshift code are maintained with the
product.
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§ 57.6130
30 CFR Ch. I (7–1–19 Edition)
STORAGE—SURFACE ONLY
§ 57.6130 Explosive
facilities.
material
storage
(a) Detonators and explosives shall be
stored in magazines.
(b) Packaged blasting agents shall be
stored in a magazine or other facility
which is ventilated to prevent dampness and excessive heating, weather-resistant, and locked or attended. Drop
trailers do not have to be ventilated if
they are currently licensed by the Federal, State, or local authorities for
over-the-road use. Facilities other than
magazines used to store blasting
agents shall contain only blasting
agents.
(c) Bulk blasting agents shall be
stored in weather-resistant bins or
tanks which are locked, attended, or
otherwise inaccessible to unauthorized
entry.
(d) Facilities, bins or tanks shall be
posted with the appropriate United
States Department of Transportation
placards or other appropriate warning
signs that indicate the contents and
are visible from each approach.
§ 57.6131 Location of explosive material storage facilities.
(a) Storage facilities for any explosive material shall be—
(1) Located so that the forces generated by a storage facility explosion
will not create a hazard to occupants
in mine buildings and will not damage
dams or electric substations; and
(2) Detached structures located outside the blast area and a sufficient distance from powerlines so that the
powerlines, if damaged, would not contact the magazines.
(b) Operators should also be aware of
regulations affecting storage facilities
in 27 CFR part 55, in particular, 27 CFR
55.218 and 55.220. This document is
available at any MSHA Metal and
Nonmetal Safety and Health district
office.
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§ 57.6132
Magazine requirements.
(a) Magazines shall be—
(1) Structurally sound;
(2) Noncombustible or the exterior
covered with fire-resistant material;
(3) Bullet resistant;
(4) Made of nonsparking material on
the inside;
(5) Ventilated to control dampness
and excessive heating within the magazine;
(6) Posted with the appropriate
United States Department of Transportation placards or other appropriate
warning signs that indicate the contents and are visible from each approach, so located that a bullet passing
through any of the signs will not strike
the magazine;
(7) Kept clean and dry inside;
(8) Unlighted or lighted by devices
that are specifically designed for use in
magazines and which do not create a
fire or explosion hazard;
(9) Unheated or heated only with devices that do not create a fire or explosion hazard;
(10) Locked when unattended; and
(11) Used exclusively for the storage
of explosive material except for essential nonsparking equipment used for
the operation of the magazine.
(b)
Metal
magazines
shall
be
equipped with electrical bonding connections between all conductive portions so the entire structure is at the
same electrical potential. Suitable
electrical bonding methods include
welding, riveting, or the use of securely
tightened bolts where individual metal
portions are joined. Conductive portions of nonmetal magazines shall be
grounded.
(c) Electrical switches and outlets
shall be located on the outside of the
magazine.
§ 57.6133
Powder chests.
(a) Powder chests (day boxes) shall
be—
(1) Structurally sound, weather-resistant, equipped with a lid or cover,
and with only nonsparking material on
the inside;
(2) Posted with the appropriate
United States Department of Transportation placards or other appropriate
warning signs that indicate the contents and are visible from each approach;
(3) Located out of the blast area once
loading has been completed;
(4) Locked or attended when containing explosive material; and
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Mine Safety and Health Admin., Labor
§ 57.6161
(5) Emptied at the end of each shift
with the contents returned to a magazine or other storage facility, or attended.
(b) Detonators shall be kept in chests
separate from explosives or blasting
agents, unless separated by 4 inches of
hardwood or equivalent, or a laminated
partition. When a laminated partition
is used, operators must follow the provisions of the Institute of Makers of
Explosives (IME) Safety Library Publication No. 22, ‘‘Recommendations for
the Safe Transportation of Detonators
in a Vehicle with Other Explosive Materials’’ (May 1993), and the ‘‘Generic
Loading Guide for the IME–22 Container’’ (October 1993). The IME is located at 1120 19th Street NW., Suite 310,
Washington, DC 20036–3605; 202–429–9280;
https://www.ime.org. This incorporation
by reference has been approved by the
Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR
part 51. Copies are available at MSHA’s
Office of Standards, Regulations, and
Variances, 201 12th Street South, Arlington, VA 22202–5452; 202–693–9440; and
at all Metal and Nonmetal Mine Safety
and Health District Offices, or available for inspection at the National Archives and Records Administration
(NARA). For information on the availability of this material at NARA, call
202–741–6030,
or
go
to:
http://
www.archives.gov/federallregister/
codeloflfederallregulations/
ibrllocations.html.
(5) At least 50 feet from electric substations;
(6) A safe distance from trolley wires;
and
(7) At least 25 feet from detonator
storage facilities.
(b) Main facilities used to store explosive material underground shall
be—
(1) Posted with warning signs that indicate the contents and are visible
from any approach;
(2) Used exclusively for the storage of
explosive material and necessary
equipment associated with explosive
material storage and delivery:
(i) Portions of the facility used for
the storage of explosives shall only
contain nonsparking material or equipment.
(ii) The blasting agent portion of the
facility may be used for the storage of
other necessary equipment;
(3) Kept clean, suitably dry, and orderly;
(4) Provided with unobstructed ventilation openings;
(5) Kept securely locked unless all access to the mine is either locked or attended; and
(6) Unlighted or lighted only with devices that do not create a fire or explosion hazard and which are specifically
designed for use in magazines.
(c) Electrical switches and outlets
shall be located outside the facility.
[61 FR 36801, July 12, 1996, as amended at 67
FR 38385, June 4, 2002; 80 FR 52988, Sept. 2,
2015]
(a) Auxiliary facilities used to store
explosive material near work places
shall be wooden, box-type containers
equipped with covers or doors, or facilities constructed or mined-out to provide equivalent impact resistance and
confinement.
(b) The auxiliary facilities shall be—
(1) Constructed of nonsparking material on the inside when used for the
storage of explosives;
(2) Kept clean, suitably dry, and orderly;
(3) Kept in repair;
(4) Located out of the line of blasts so
they will not be subjected to damaging
shock or flyrock;
(5) Identified with warning signs or
coded to indicate the contents with
markings visible from any approach;
kpayne on VMOFRWIN702 with $$_JOB
STORAGE—UNDERGROUND ONLY
§ 57.6160 Main facilities.
(a) Main facilities used to store explosive material underground shall be
located—
(1) In stable or supported ground;
(2) So that a fire or explosion in the
storage facilities will not prevent escape from the mine, or cause detonation of the contents of another storage
facility;
(3) Out of the line of blasts, and protected from vehicular traffic, except
that accessing the facility;
(4) At least 200 feet from work places
or shafts;
§ 57.6161
Auxiliary facilities.
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§ 57.6200
30 CFR Ch. I (7–1–19 Edition)
(6) Located at least 15 feet from all
haulageways and electrical equipment,
or placed entirely within a mined-out
recess in the rib used exclusively for
explosive material;
(7) Filled with no more than a oneweek supply of explosive material;
(8) Separated by at least 25 feet from
other facilities used to store detonators; and
(9) Kept securely locked unless all access to the mine is either locked or attended.
TRANSPORTATION—SURFACE AND
UNDERGROUND
§ 57.6200 Delivery to storage or blast
site areas.
Explosive material shall be transported without undue delay to the storage area or blast site.
kpayne on VMOFRWIN702 with $$_JOB
§ 57.6201 Separation of transported explosive material.
Detonators shall not be transported
on the same vehicle or conveyance
with other explosives except as follows:
(a) Detonators in quantities of more
than 1,000 may be transported in a vehicle or conveyance with explosives or
blasting agents provided the detonators are—
(1) Maintained in the original packaging as shipped from the manufacturer; and
(2) Separated from explosives or
blasting agents by 4 inches of hardwood
or equivalent, or a laminated partition.
The hardwood or equivalent shall be
fastened to the vehicle or conveyance.
When a laminated partition is used, operators must follow the provisions of
the Institute of Makers of Explosives
(IME) Safety Library Publication No.
22, ‘‘Recommendations for the Safe
Transportation of Detonators in a Vehicle with Other Explosive Materials’’
(May 1993), and the ‘‘Generic Loading
Guide for the IME–22 Container’’ (October 1993). The IME is located at 1120
19th Street NW., Suite 310, Washington,
DC 20036–3605; 202–429–9280; https://
www.ime.org. This incorporation by reference has been approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR
part 51. Copies are available at MSHA’s
Office of Standards, Regulations, and
Variances, 201 12th Street South, Arlington, VA 22202–5452; 202–693–9440; and
at all Metal and Nonmetal Mine Safety
and Health District Offices, or available for examination at the National
Archives and Records Administration
(NARA). For information on the availability of this material at NARA, call
202–741–6030,
or
go
to:
http://
www.archives.gov/federallregister/
codeloflfederallregulations/
ibrllocations.html.
(b) Detonators in quantities of 1,000
or fewer may be transported with explosives or blasting agents provided the
detonators are—
(1) Kept in closed containers; and
(2) Separated from explosives or
blasting agents by 4 inches of hardwood
or equivalent, or a laminated partition.
The hardwood or equivalent shall be
fastened to the vehicle or conveyance.
When a laminated partition is used, operators must follow the provisions of
IME Safety Library Publication No. 22,
‘‘Recommendations for the Safe Transportation of Detonators in a Vehicle
with Other Explosive Materials’’ (May
1993), and the ‘‘Generic Loading Guide
for the IME–22 Container’’ (October
1993). The IME is located at 1120 19th
Street NW., Suite 310, Washington, DC
20036–3605;
202–429–9280;
https://
www.ime.org. This incorporation by reference has been approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR
part 51. Copies are available at MSHA’s
Office of Standards, Regulations, and
Variances, 201 12th Street South, Arlington, VA 22202–5452; 202–693–9440; and
at all Metal and Nonmetal Mine Safety
and Health District Offices, or available for examination at the National
Archives and Records Administration
(NARA). For information on the availability of this material at NARA, call
202–741–6030,
or
go
to:
http://
www.archives.gov/federallregister/
codeloflfederallregulations/
ibrllocations.html.
[61 FR 36801, July 12, 1996, as amended at 67
FR 38385, June 4, 2002; 80 FR 52988, Sept. 2,
2015]
§ 57.6202
Vehicles.
(a) Vehicles containing explosive material shall be—
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Mine Safety and Health Admin., Labor
§ 57.6303
(1) Maintained in good condition and
shall comply with the requirements of
subpart M of this part;
(2) Equipped with sides and enclosures higher than the explosive material being transported or have the explosive material secured to a nonconductive pallet;
(3) Equipped with a cargo space that
shall contain the explosive material
(passenger areas shall not be considered cargo space);
(4) Equipped with at least two multipurpose
dry-chemical
fire
extinguishers or one such extinguisher and
an automatic fire suppression system;
(5) Posted with warning signs that indicate the contents and are visible
from each approach;
(6) Occupied only by persons necessary for handling the explosive material;
(7) Attended or the cargo compartment locked at surface areas of underground mines, except when parked at
the blast site and loading is in
progress; and
(8) Secured while parked by having—
(i) The brakes set;
(ii) The wheels chocked if movement
could occur; and
(iii) The engine shut off unless
powering a device being used in the
loading operation.
(b) Vehicles containing explosives
shall have—
(1) No sparking material exposed in
the cargo space; and
(2) Only properly secured nonsparking equipment in the cargo space
with the explosives.
(c) Vehicles used for dispensing bulk
explosive material shall—
(1) Have no zinc or copper exposed in
the cargo space; and
(2) Provide any enclosed screw-type
conveyors with protection against internal pressure and frictional heat.
(1) The hoist operator shall be notified; and
(2) Hoisting in adjacent shaft compartments, except for empty conveyances or counterweights, shall be
stopped until transportation of the explosive material is completed.
(b) Explosive material transported in
hoist conveyances shall be placed within a container which prevents shifting
of the cargo that could cause detonation of the container by impact or by
sparks. The manufacturer’s container
may be used if secured to a nonconductive pallet. When explosives are transported, they shall be secured so as not
to contact any sparking material.
(c) No explosive material shall be
transported during a mantrip.
§ 57.6203 Locomotives.
Explosive material shall not be
transported on a locomotive. When explosive material is hauled by trolley
locomotive, covered, electrically insulated cars shall be used.
§ 57.6302
rial.
§ 57.6204 Hoists.
(a) Before explosive material
transported in hoist conveyances—
(a) Primers shall be made up only at
the time of use and as close to the
blast site as conditions allow.
is
§ 57.6205 Conveying
hand.
explosives
Closed, nonconductive containers
shall be used to carry explosives and
detonators to and from blast sites. Separate containers shall be used for explosives and detonators.
USE—SURFACE AND
UNDERGROUND
§ 57.6300 Control
ations.
of
blasting
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oper-
(a) Only persons trained and experienced in the handling and use of explosive material shall direct blasting operations and related activities.
(b) Trainees and inexperienced persons shall work only in the immediate
presence of persons trained and experienced in the handling and use of explosive material.
§ 57.6301
Blasthole obstruction check.
Before loading, blastholes shall be
checked and, wherever possible, cleared
of obstructions.
Separation of explosive mate-
Explosives and blasting agents shall
be kept separated from detonators
until loading begins.
§ 57.6303
Initiation preparation.
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§ 57.6304
30 CFR Ch. I (7–1–19 Edition)
(b) Primers shall be prepared with
the detonator contained securely and
completely within the explosive or contained securely and appropriately for
its design in the tunnel or cap well.
(c) When using detonating cord to
initiate another explosive, a connection shall be prepared with the detonating cord threaded through, attached
securely to, or otherwise in contact
with the explosive.
§ 57.6304 Primer protection.
(a) Tamping shall not be done directly on a primer.
(b) Rigid cartridges of explosives or
blasting agents that are 4 inches (100
millimeters) in diameter or larger shall
not be dropped on the primer except
where the blasthole contains sufficient
depth of water to protect the primer
from impact. Slit packages of prill,
water gel, or emulsions are not considered rigid cartridges and may be drop
loaded.
kpayne on VMOFRWIN702 with $$_JOB
§ 57.6305 Unused explosive material.
Unused explosive material shall be
moved to a protected location as soon
as practical after loading operations
are completed.
§ 57.6306 Loading, blasting, and security.
(a) When explosive materials or initiating systems are brought to the blast
site, the blast site shall be attended;
barricaded and posted with warning
signs, such as ‘‘Danger,’’ ‘‘Explosives,’’
or ‘‘Keep Out;’’ or flagged against unauthorized entry.
(b) Vehicles and equipment shall not
be driven over explosive material or
initiating systems in a manner which
could contact the material or system,
or create other hazards.
(c) Once loading begins, the only activities permitted within the blast site
shall be those activities directly related to the blasting operation and the
activities of surveying, stemming,
sampling of geology, and reopening of
holes, provided that reasonable care is
exercised. Haulage activity is permitted near the base of bench faces
being loaded or awaiting firing, provided no other haulage access exists.
(d) Loading and blasting shall be conducted in a manner designed to facili-
tate a continuous process, with the
blast fired as soon as possible following
the completion of loading. If blasting a
loaded round may be delayed for more
than 72 hours, the operator shall notify
the appropriate MSHA district office.
(e) In electric blasting prior to connecting to the power source, and in
nonelectric blasting prior to attaching
an initiating device, all persons shall
leave the blast area except persons in a
blasting shelter or other location that
protects them from concussion (shock
wave), flying material, and gases.
(f) Before firing a blast—
(1) Ample warning shall be given to
allow all persons to be evacuated;
(2) Clear exit routes shall be provided
for persons firing the round; and
(3) All access routes to the blast area
shall be guarded or barricaded to prevent the passage of persons or vehicles.
(g) Work shall not be resumed in the
blast area until a post-blast examination addressing potential blast-related
hazards has been conducted by a person
with the ability and experience to perform the examination.
§ 57.6307
Drill stem loading.
Explosive material shall not be loaded into blastholes with drill stem
equipment or other devices that could
be extracted while containing explosive
material. The use of loading hose, collar sleeves, or collar pipes is permitted.
§ 57.6308
Initiation systems.
Initiation systems shall be used in
accordance with the manufacturer’s instructions.
§ 57.6309 Fuel
ANFO.
oil
requirements
(a) Liquid hydrocarbon fuels with
flash points lower than that of No. 2
diesel oil (125 °F) shall not be used to
prepare ammonium nitrate-fuel oil, except that diesel fuels with flash points
no lower than 100 °F may be used at
ambient air temperatures below 45 °F.
(b) Waste oil, including crankcase
oil, shall not be used to prepare ammonium nitrate-fuel oil.
§ 57.6310
Misfire waiting period.
When a misfire is suspected, persons
shall not enter the blast area—
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Mine Safety and Health Admin., Labor
§ 57.6407
(a) For 30 minutes if safety fuse and
blasting caps are used; or
(b) For 15 minutes if any other type
detonators are used.
nators if stray current tests, conducted
as frequently as necessary, indicate a
maximum stray current of less than
0.05 ampere through a 1-ohm resistor as
measured at the blast site.
§ 57.6311 Handling of misfires.
(a) Faces and muck piles shall be examined for misfires after each blasting
operation.
(b) Only work necessary to remove a
misfire and protect the safety of miners engaged in the removal shall be
permitted in the affected area until the
misfire is disposed of in a safe manner.
(c) When a misfire cannot be disposed
of safely, each approach to the area affected by the misfire shall be posted
with a warning sign at a conspicuous
location to prohibit entry, and the condition shall be reported immediately to
mine management.
(d) Misfires occurring during the
shift shall be reported to mine management not later than the end of the
shift.
§ 57.6312 Secondary blasting.
Secondary blasts fired at the same
time in the same work area shall be
initiated from one source.
ELECTRIC BLASTING—SURFACE AND
UNDERGROUND
§ 57.6400 Compatibility of electric detonators.
All electric detonators to be fired in
a round shall be from the same manufacturer and shall have similar electrical firing characteristics.
kpayne on VMOFRWIN702 with $$_JOB
§ 57.6401 Shunting.
Except during testing—
(a) Electric detonators shall be kept
shunted until connected to the blasting
line or wired into a blasting round;
(b) Wired rounds shall be kept shunted until connected to the blasting line;
and
(c) Blasting lines shall be kept shunted until immediately before blasting.
§ 57.6402 Deenergized circuits near
detonators.
Electrical distribution circuits within 50 feet of electric detonators at the
blast site shall be deenergized. Such
circuits need not be deenergized between 25 to 50 feet of the electric deto-
§ 57.6403 Branch circuits.
(a) If electric blasting includes the
use of branch circuits, each branch
shall be equipped with a safety switch
or equivalent method to isolate the circuits to be used.
(b) At least one safety switch or
equivalent method of protection shall
be located outside the blast area and
shall be in the open position until persons are withdrawn.
§ 57.6404 Separation of blasting circuits from power source.
(a) Switches used to connect the
power source to a blasting circuit shall
be locked in the open position except
when closed to fire the blast.
(b) Lead wires shall not be connected
to the blasting switch until the shot is
ready to be fired.
§ 57.6405 Firing devices.
(a) Power sources shall be capable of
delivering sufficient current to energize all electric detonators to be fired
with the type of circuits used. Storage
or dry cell batteries are not permitted
as power sources.
(b) Blasting machines shall be tested,
repaired, and maintained in accordance
with manufacturer’s instructions.
(c) Only the blaster shall have the
key or other control to an electrical
firing device.
§ 57.6406 Duration of current flow.
If any part of a blast is connected in
parallel and is to be initiated from
powerlines or lighting circuits, the
time of current flow shall be limited to
a maximum of 25 milliseconds. This
can be accomplished by incorporating
an arcing control device in the blasting
circuit or by interrupting the circuit
with an explosive device attached to
one or both lead lines and initiated by
a 25-millisecond delay electric detonator.
§ 57.6407 Circuit testing.
A blasting galvanometer or other instrument designed for testing blasting
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§ 57.6500
30 CFR Ch. I (7–1–19 Edition)
circuits shall be used to test the following:
(a) In surface operations—
(1) Continuity of each electric detonator in the blasthole prior to stemming and connection to the blasting
line;
(2) Resistance of individual series or
the resistance of multiple balanced series to be connected in parallel prior to
their connection to the blasting line;
(3) Continuity of blasting lines prior
to the connection of electric detonator
series; and
(4) Total blasting circuit resistance
prior to connection to the power
source.
(b) In underground operations—
(1) Continuity of each electric detonator series; and
(2) Continuity of blasting lines prior
to the connection of electric detonators.
NONELECTRIC BLASTING—SURFACE AND
UNDERGROUND
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§ 57.6500 Damaged initiating material.
A visual check of the completed circuit shall be made to ensure that the
components are properly aligned and
connected. Safety fuse, igniter cord,
detonating cord, shock or gas tubing,
and similar material which is kinked,
bent sharply, or damaged shall not be
used.
§ 57.6501 Nonelectric initiation systems.
(a) When the nonelectric initiation
system uses shock tube—
(1) Connections with other initiation
devices shall be secured in a manner
which provides for uninterrupted propagation;
(2) Factory-made units shall be used
as assembled and shall not be cut except that a single splice is permitted
on the lead-in trunkline during dry
conditions; and
(3) Connections between blastholes
shall not be made until immediately
prior to clearing the blast site when
surface delay detonators are used.
(b) When the nonelectric initiation
system uses detonating cord—
(1) The line of detonating cord extending out of a blasthole shall be cut
from the supply spool immediately
after the attached explosive is correctly positioned in the hole;
(2) In multiple row blasts, the trunkline layout shall be designed so that
the
detonation
can
reach
each
blasthole from at least two directions;
(3) Connections shall be tight and
kept at right angles to the trunkline;
(4) Detonators shall be attached securely to the side of the detonating
cord and pointed in the direction in
which detonation is to proceed;
(5) Connections between blastholes
shall not be made until immediately
prior to clearing the blast site when
surface delay detonators are used; and
(6) Lead-in lines shall be manually
unreeled if connected to the trunklines
at the blast site.
(c) When nonelectric initiation systems use gas tube, continuity of the
circuit shall be tested prior to blasting.
§ 57.6502 Safety fuse.
(a) The burning rate of each spool of
safety fuse to be used shall be measured, posted in locations which will be
conspicuous to safety fuse users, and
brought to the attention of all persons
involved with the blasting operation.
(b) When firing with safety fuse ignited individually using handheld
lighters, the safety fuse shall be of
lengths which provide at least the minimum burning time for a particular
size round, as specified in the following
table:
TABLE E–1—SAFETY FUSE—MINIMUM BURNING
TIME
Minimum
burning time
Number of holes in a round
1 .........................................................
2–5 .....................................................
6–10 ...................................................
11 to 15 .............................................
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min. 40 sec.
min. 20 sec.
min.
1 For example, at least a 36-inch length of 40-second-perfoot safety fuse or at least a 48-inch length of 30-second-perfoot safety fuse would have to be used to allow sufficient time
to evacuate the area.
(c) Where flyrock might damage exposed safety fuse, the blast shall be
timed so that all safety fuses are burning within the blastholes before any
blasthole detonates.
(d) Fuse shall be cut and capped in
dry locations.
(e) Blasting caps shall be crimped to
fuse only with implements designed for
that purpose.
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Mine Safety and Health Admin., Labor
§ 57.6800
(f) Safety fuse shall be ignited only
after the primer and the explosive material are securely in place.
(g) Safety fuse shall be ignited only
with devices designed for that purpose.
Carbide lights, liquefied petroleum gas
torches, and cigarette lighters shall
not be used to light safety fuse.
(h) At least two persons shall be
present when lighting safety fuse, and
no one shall light more than 15 individual fuses. If more than 15 holes per
person are to be fired, electric initiation systems, igniter cord and connectors, or other nonelectric initiation
systems shall be used.
other potential sources of extraneous
electricity; and
(e) Plastic tubes shall not be used as
hole liners if the hole contains an electric detonator.
EXTRANEOUS ELECTRICITY—SURFACE
AND UNDERGROUND
§ 57.6600 Loading practices.
If extraneous electricity is suspected
in an area where electric detonators
are used, loading shall be suspended
until tests determine that stray current does not exceed 0.05 amperes
through a 1-ohm resister when measured at the location of the electric detonators. If greater levels of extraneous
electricity are found, the source shall
be determined and no loading shall
take place until the condition is corrected.
kpayne on VMOFRWIN702 with $$_JOB
§ 57.6601 Grounding.
Electric blasting circuits, including
powerline sources when used, shall not
be grounded.
§ 57.6602 Static electricity dissipation
during loading.
When explosive material is loaded
pneumatically into a blasthole in a
manner that generates a static electricity hazard—
(a) An evaluation of the potential
static electricity hazard shall be made
and any hazard shall be eliminated before loading begins;
(b) The loading hose shall be of a
semiconductive type, have a total of
not more than 2 megohms of resistance
over its entire length and not less than
1000 ohms of resistance per foot;
(c) Wire-countered hoses shall not be
used;
(d) Conductive parts of the loading
equipment shall be bonded and grounded and grounds shall not be made to
§ 57.6603
Air gap.
At least a 15-foot air gap shall be provided between the blasting circuit and
the electric power source.
§ 57.6604
Precautions during storms.
During the approach and progress of
an electrical storm—
(a) Surface blasting operations shall
be suspended and persons withdrawn
from the blast area or to a safe location; or
(b) Underground electrical blasting
operations that are capable of being
initiated by lightning shall be suspended and all persons withdrawn from
the blast area or to a safe location.
§ 57.6605
Isolation of blasting circuits.
Lead wires and blasting lines shall be
isolated and insulated from power conductors, pipelines, and railroad tracks,
and shall be protected from sources of
stray or static electricity. Blasting circuits shall be protected from any contact between firing lines and overhead
powerlines which could result from the
force of a blast.
EQUIPMENT/TOOLS—SURFACE AND
UNDERGROUND
§ 57.6700
Nonsparking tools.
Only nonsparking tools shall be used
to open containers of explosive material or to punch holes in explosive cartridges.
§ 57.6701 Tamping and loading pole requirements.
Tamping and loading poles shall be of
wood or other nonconductive, nonsparking material. Couplings for poles
shall be nonsparking.
MAINTENANCE—SURFACE AND
UNDERGROUND
§ 57.6800
Storage facilities.
When repair work which could
produce a spark or flame is to be performed on a storage facility—
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§ 57.6801
30 CFR Ch. I (7–1–19 Edition)
(a) The explosive material shall be
moved to another facility, or moved at
least 50 feet from the repair activity
and monitored; and
(b) The facility shall be cleaned to
prevent accidental detonation.
§ 57.6801 Vehicle repair.
Vehicles containing explosive material and oxidizers shall not be taken
into a repair garage or shop.
§ 57.6802 Bulk delivery vehicles.
No welding or cutting shall be performed on a bulk delivery vehicle until
the vehicle has been washed down and
all explosive material has been removed. Before welding or cutting on a
hollow shaft, the shaft shall be thoroughly cleaned inside and out and
vented with a minimum 1⁄2-inch diameter opening to allow for sufficient ventilation.
§ 57.6803 Blasting lines.
Permanent blasting lines shall be
properly supported. All blasting lines
shall be insulated and kept in good repair.
GENERAL REQUIREMENTS—SURFACE AND
UNDERGROUND
kpayne on VMOFRWIN702 with $$_JOB
§ 57.6900 Damaged or deteriorated explosive material.
Damaged or deteriorated explosive
material shall be disposed of in a safe
manner in accordance with the instructions of the manufacturer.
§ 57.6901 Black powder.
(a) Black powder shall be used for
blasting only when a desired result
cannot be obtained with another type
of explosive, such as in quarrying certain types of dimension stone.
(b) Containers of black powder shall
be—
(1) Nonsparking;
(2) Kept in a totally enclosed cargo
space while being transported by a vehicle;
(3) Securely closed at all times
when—
(i) Within 50 feet of any magazine or
open flame;
(ii) Within any building in which a
fuel-fired or exposed-element electric
heater is operating; or
(iii) In an area where electrical or incandescent-particle sparks could result
in powder ignition; and
(4) Opened only when the powder is
being transferred to a blasthole or another container and only in locations
not listed in paragraph (b)(3) of this
section.
(c) Black powder shall be transferred
from containers only by pouring.
(d) Spills shall be cleaned up promptly with nonsparking equipment. Contaminated powder shall be put into a
container of water and shall be disposed of promptly after the granules
have disintegrated, or the spill area
shall be flushed promptly with water
until the granules have disintegrated
completely.
(e) Misfires shall be disposed of by
washing the stemming and powder
charge from the blasthole, and removing and disposing of the initiator in accordance with the requirement for
damaged explosives.
(f) Holes shall not be reloaded for at
least 12 hours when the blastholes have
failed to break as planned.
§ 57.6902
Excessive temperatures.
(a) Where heat could cause premature
detonation, explosive material shall
not be loaded into hot areas, such as
kilns or sprung holes.
(b) When blasting sulfide ores where
hot holes occur that may react with
explosive material in blastholes, operators shall—
(1) Measure an appropriate number of
blasthole temperatures in order to assess the specific mine conditions prior
to the introduction of explosive material;
(2) Limit the time between the completion of loading and the initiation of
the blast to no more than 12 hours; and
(3) Take other special precautions to
address the specific conditions at the
mine to prevent premature detonation.
§ 57.6903
Burning explosive material.
If explosive material is suspected of
burning at the blast site, persons shall
be evacuated from the endangered area
and shall not return for at least one
hour after the burning or suspected
burning has stopped.
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Mine Safety and Health Admin., Labor
§ 57.6904
Smoking and open flames.
Smoking and use of open flames shall
not be permitted within 50 feet of explosive material except when separated
by permanent noncombustible barriers.
This standard does not apply to devices
designed to ignite safety fuse or to
heating devices which do not create a
fire or explosion hazard.
§ 57.6905
rial.
Protection of explosive mate-
(a) Explosive material shall be protected from temperatures in excess of
150 degrees Fahrenheit.
(b) Explosive material shall be protected from impact, except for tamping
and dropping during loading.
GENERAL REQUIREMENTS—
UNDERGROUND ONLY
§ 57.6960
Mixing of explosive material.
(a) The mixing of ingredients to
produce explosive material shall not be
conducted underground unless prior approval of the MSHA district manager is
obtained. In granting or withholding
approval, the district manager shall
consider the potential hazards created
by—
(1) The location of the stored material and the storage practices used;
(2) The transportation and use of the
explosive material;
(3) The nature of the explosive material, including its sensitivity;
(4) Any other factor deemed relevant
to the safety of miners potentially exposed to the hazards associated with
the mixing of the bulk explosive material underground.
(b) Storage facilities for the ingredients to be mixed shall provide drainage
away from the facilities for leaks and
spills.
DRILLING—SURFACE ONLY
kpayne on VMOFRWIN702 with $$_JOB
§ 57.7003 Drill area inspection.
The drilling area shall be inspected
for hazards before starting the drilling
operations.
§ 57.7004 Drill mast.
Persons shall not be on a mast while
the drill-bit is in operation unless they
are provided with a safe platform from
which to work and they are required to
use safety belts to avoid falling.
§ 57.7005 Augers and drill stems.
Drill crews and others shall stay
clear of augers or drill stems that are
in motion. Persons shall not pass under
or step over a moving stem or auger.
§ 57.7008 Moving the drill.
When a drill is being moved from one
drilling area to another, drill steel,
tools, and other equipment shall be secured and the mast placed in a safe position.
§ 57.7009 Drill helpers.
If a drill helper assists the drill operator during movement of a drill to a
new location, the helper shall be in
sight of, or in communication with, the
operator at all times.
§ 57.7010 Power failures.
In the event of power failure, drill
controls shall be placed in the neutral
position until power is restored.
§ 57.7011 Straightening crossed cables.
The drill stem shall be resting on the
bottom of the hole or on the platform
with the stem secured to the mast before attempts are made to straighten a
crossed cable on a reel.
§ 57.7012 Tending drills in operation.
While in operation, drills shall be attended at all times.
§ 57.7013 Covering or guarding drill
holes.
Drill holes large enough to constitute
a hazard shall be covered or guarded.
Subpart F—Drilling and Rotary Jet
Piercing
§ 57.7002
§ 57.7018
Equipment defects.
Equipment defects affecting safety
shall be corrected before the equipment
is used.
§ 57.7018 Hand clearance.
Persons shall not hold the drill steel
while collaring holes, or rest their
hands on the chuck or centralizer while
drilling.
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§ 57.7028
30 CFR Ch. I (7–1–19 Edition)
DRILLING—UNDERGROUND ONLY
§ 57.7028
§ 57.7056
Hand clearance.
Persons shall not rest their hands on
the chuck or centralizer while drilling.
§ 57.7032
ROTARY JET PIERCING—SURFACE ONLY
DRILLING—SURFACE AND UNDERGROUND
Tool and drill steel racks.
Receptacles or racks shall be provided for drill steel and tools stored or
carried on drills.
§ 57.7051 Loose objects on the mast or
drill platform.
To prevent injury to personnel, tools
and other objects shall not be left loose
on the mast or drill platform.
§ 57.7052
Drilling positions.
Persons shall not drill from—
(a) Positions which hinder their access to the control levers;
(b) Insecure footing or insecure staging; or
(c) Atop equipment not suitable for
drilling.
§ 57.7053
Moving hand-held drills.
Before hand-held drills are moved
from one working area to another, air
shall be turned off and bled from the
hose.
§ 57.7054 Starting
equipment.
or
moving
drill
Drill operators shall not start or
move drilling equipment unless all
miners are in the clear.
§ 57.7055
Intersecting holes.
Holes shall not be drilled where there
is a danger of intersecting a misfired
hole or a hole containing explosives,
blasting agents, or detonators.
kpayne on VMOFRWIN702 with $$_JOB
[56 FR 46517, Sept. 12, 1991]
Anchoring.
Columns and the drills mounted on
them shall be anchored firmly before
and during drilling.
§ 57.7050
Collaring in bootlegs.
Holes shall not be collared in bootlegs.
[56 FR 46517, Sept. 12, 1991; 56 FR 52193, Oct.
18, 1991]
§ 57.7801
Jet drills.
Jet piercing drills shall be provided
with:
(a) A system to pressurize the equipment operator’s cab, when a cab is provided; and
(b) A protective cover over the oxygen flow indicator.
§ 57.7802
Oxygen hose lines.
Safety chains or other suitable locking devices shall be provided across
connections to and between high pressure oxygen hose lines of 1-inch inside
diameter or larger.
§ 57.7803
Lighting the burner.
A suitable means of protection shall
be provided for the employee when
lighting the burner.
§ 57.7804
Refueling.
When rotary jet piercing equipment
requires refueling at locations other
than fueling stations, a system for
fueling without spillage shall be provided.
§ 57.7805
Smoking and open flames.
Persons shall not smoke and open
flames shall not be used in the vicinity
of the oxygen storage and supply lines.
Signs warning against smoking and
open flames shall be posted in these
areas.
§ 57.7806
Oxygen intake coupling.
The oxygen intake coupling on jet
piercing drills shall be constructed so
that only the oxygen hose can be coupled to it.
§ 57.7807 Flushing
chamber.
the
The combustion chamber of a jet
drill stem which has been sitting
unoperated in a drill hole shall be
flushed with a suitable solvent after
the stem is pulled up.
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Mine Safety and Health Admin., Labor
Subpart G—Ventilation
SURFACE AND UNDERGROUND
§ 57.8518 Main and booster fans.
(a) All mine main and booster fans
installed and used to ventilate the active workings of the mine shall be operated continuously while persons are
underground in the active workings.
However, this provision is not applicable during scheduled production-cycle
shutdowns or planned or scheduled fan
maintenance or fan adjustments where
air quality is maintained in compliance with the applicable standards of
subpart D of this part and all persons
underground in the affected areas are
advised in advance of such scheduled or
planned fan shutdowns, maintenance,
or adjustments.
(b) In the event of main or booster
fan failure due to a malfunction, accident, power failure, or other such unplanned or unscheduled event:
(1) The air quality in the affected active workings shall be tested at least
within 2-hours of the discovery of the
fan failure, and at least every 4-hours
thereafter by a competent person for
compliance with the requirements of
the applicable standards of subpart D
of this part until normal ventilation is
restored, or
(2) All persons, except those working
on the fan, shall be withdrawn, the
ventilation shall be restored to normal
and the air quality in the affected active workings shall be tested by a competent person to assure that the air
quality meets the requirements of the
standards in subpart D of this part, before any other persons are permitted to
enter the affected active workings.
§ 57.8519 Underground main fan controls.
All underground main fans shall have
controls placed at a suitable protected
location remote from the fan and preferably on the surface.
kpayne on VMOFRWIN702 with $$_JOB
UNDERGROUND ONLY
§ 57.8520 Ventilation plan.
A plan of the mine ventilation system shall be set out by the operator in
written form. Revisions of the system
shall be noted and updated at least an-
§ 57.8520
nually. The ventilation plan or revisions thereto shall be submitted to the
District Manager for review and comments upon his written request. The
plan shall, where applicable, contain
the following:
(a) The mine name.
(b) The current mine map or schematic or series of mine maps or schematics of an appropriate scale, not
greater than five hundred feet to the
inch, showing:
(1) Direction and quantity of principal air flows;
(2) Locations of seals used to isolate
abandoned workings;
(3) Locations of areas withdrawn
from the ventilation system;
(4) Locations of all main, booster and
auxiliary fans not shown in paragraph
(d) of this standard.
(5) Locations of air regulators and
stoppings and ventilation doors not
shown in paragraph (d) of this standard;
(6) Locations of overcasts, undercasts
and other airway crossover devices not
shown in paragraph (d) of this standard;
(7) Locations of known oil or gas
wells;
(8) Locations of known underground
mine openings adjacent to the mine;
(9) Locations of permanent underground shops, diesel fuel storage depots, oil fuel storage depots, hoist
rooms, compressors, battery charging
stations and explosive storage facilities. Permanent facilities are those intended to exist for one year or more;
and
(10) Significant changes in the ventilation system projected for one year.
(c) Mine fan data for all active main
and booster fans including manufacturer’s name, type, size, fan speed, blade
setting,
approximate
pressure
at
present operating point, and motor
brake horsepower rating.
(d)
Diagrams,
descriptions
or
sketches showing how ventilation is
accomplished in each typical type of
working place including the approximate quantity of air provided, and typical size and type of auxiliary fans
used.
(e) The number and type of internal
combustion engine units used underground, including make and model of
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§ 57.8525
30 CFR Ch. I (7–1–19 Edition)
unit, type of engine, make and model
of engine, brake horsepower rating of
engine, and approval number.
[50 FR 4082, Jan. 29, 1985, as amended at 60
FR 33723, June 29, 1995]
§ 57.8525 Main fan maintenance.
Main fans shall be maintained according to either the manufacturer’s
recommendations or a written periodic
schedule adopted by the operator which
shall be available at the operation on
request of the Secretary or his authorized representative.
[50 FR 4082, Jan. 29, 1985, as amended at 60
FR 33723, June 29, 1995]
§ 57.8527 Oxygen-deficiency testing.
Flame safety lamps or other suitable
devices shall be used to test for acute
oxygen deficiency.
§ 57.8528 Unventilated areas.
Unventilated areas shall be sealed, or
barricaded and posted against entry.
§ 57.8529 Auxiliary fan systems.
When auxiliary fan systems are used,
such systems shall minimize recirculation and be maintained to provide ventilation air that effectively sweeps the
working places.
§ 57.8531 Construction and maintenance of ventilation doors.
Ventilation doors shall be—
(a) Substantially constructed;
(b) Covered with fire-retardant material, if constructed of wood;
(c) Maintained in good condition;
(d) Self-closing, if manually operated; and
(e) Equipped with audible or visual
warning devices, if mechanically operated.
kpayne on VMOFRWIN702 with $$_JOB
§ 57.8532 Opening and closing ventilation doors.
When ventilation control doors are
opened as a part of the normal mining
cycle, they shall be closed as soon as
possible to re-establish normal ventilation to working places.
§ 57.8534 Shutdown or failure of auxiliary fans.
(a) Auxiliary fans installed and used
to ventilate the active workings of the
mine shall be operated continuously
while persons are underground in the
active workings, except for scheduled
production-cycle shutdowns or planned
or scheduled fan maintenance or fan
adjustments where air quality is maintained in compliance with the applicable standards of subpart D of this part,
and all persons underground in the affected areas are advised in advance of
such scheduled or planned fan shutdowns, maintenance, or adjustments.
(b) In the event of auxiliary fan failure due to malfunction, accident,
power failure, or other such unplanned
or unscheduled event:
(1) The air quality in the affected active workings shall be tested at least
within 2 hours of the discovery of the
fan failure, and at least every 4 hours
thereafter by a competent person for
compliance with the requirements of
the applicable standards of subpart D
of this part until normal ventilation is
restored, or
(2) All persons, except those working
on the fan, shall be withdrawn, the
ventilation shall be restored to normal
and the air quality in the affected active workings shall be tested by a competent person to assure that the air
quality meets the requirements of the
standards in subpart D of this part, before any other persons are permitted to
enter the affected active workings.
§ 57.8535 Seals.
Seals shall be provided with a means
for checking the quality of air behind
the seal and a means to prevent a
water head from developing unless the
seal is designed to impound water.
Subpart H—Loading, Hauling, and
Dumping
SOURCE: 53 FR 32526, Aug. 25, 1988, unless
otherwise noted.
TRAFFIC SAFETY
§ 57.9100 Traffic control.
To provide for the safe movement of
self-propelled mobile equipment—
(a) Rules governing speed, right-ofway, direction of movement, and the
use of headlights to assure appropriate
visibility, shall be established and followed at each mine; and
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Mine Safety and Health Admin., Labor
§ 57.9260
(b) Signs or signals that warn of hazardous conditions shall be placed at appropriate locations at each mine.
(c) On top of loads in mobile equipment;
(d) Outside cabs, equipment operators’ stations, and beds of mobile
equipment, except when necessary for
maintenance, testing, or training purposes, and provisions are made for secure travel. This provision does not
apply to rail equipment.
(e) Between cars of trains, on the
leading end of trains, on the leading
end of a single railcar, or in other locations on trains that expose persons to
hazards from train movement.
(1) This paragraph does not apply to
car droppers if they are secured with
safety belts and lines which prevent
them from falling off the work platform.
(2) Brakemen and trainmen are prohibited from riding between cars of
moving trains but may ride on the
leading end of trains or other locations
when necessary to perform their duties;
(f) To and from work areas in overcrowded mobile equipment;
(g) In mobile equipment with materials or equipment unless the items are
secured or are small and can be carried
safely by hand without creating a hazard to persons; or
(h) On conveyors unless the conveyors are designed to provide for their
safe transportation.
§ 57.9101 Operating speeds and control
of equipment.
Operators of self-propelled mobile
equipment shall maintain control of
the equipment while it is in motion.
Operating speeds shall be consistent
with conditions of roadways, tracks,
grades, clearance, visibility, and traffic, and the type of equipment used.
§ 57.9102 Movement of independently
operating rail equipment.
Movement of two or more pieces of
rail equipment operating independently on the same track shall be controlled for safe operation.
§ 57.9103
Clearance on adjacent tracks.
Railcars shall not be left on side
tracks unless clearance is provided for
traffic on adjacent tracks.
§ 57.9104
Railroad crossings.
Designated railroad crossings shall
be posted with warning signs or signals, or shall be guarded when trains
are passing. These crossings shall also
be planked or filled between the rails.
§ 57.9160 Train movement during shift
changes.
During shift changes, the movement
of underground trains carrying rock or
material shall be limited to areas
where the trains do not present a hazard to persons changing shifts.
TRANSPORTATION OF PERSONS AND
MATERIALS
kpayne on VMOFRWIN702 with $$_JOB
§ 57.9200
Transporting persons.
Persons shall not be transported—
(a) In or on dippers, forks, clamshells, or buckets except shaft buckets
during shaft-sinking operations or during inspection, maintenance and repair
of shafts.
(b) In beds of mobile equipment or
railcars, unless—
(1) Provisions are made for secure
travel, and
(2) Means are taken to prevent accidental unloading if the equipment is
provided with unloading devices;
§ 57.9201 Loading, hauling, and unloading of equipment or supplies.
Equipment and supplies shall be loaded, transported, and unloaded in a
manner which does not create a hazard
to persons from falling or shifting
equipment or supplies.
§ 57.9202 Loading and hauling large
rocks.
Large rocks shall be broken before
loading if they could endanger persons
or affect the stability of mobile equipment. Mobile equipment used for haulage of mined material shall be loaded
to minimize spillage where a hazard to
persons could be created.
§ 57.9260 Supplies, materials, and tools
on mantrips.
Supplies, materials, and tools, other
than small items that can be carried by
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§ 57.9261
30 CFR Ch. I (7–1–19 Edition)
hand, shall not be transported underground with persons in mantrips.
Mantrips shall be operated independently of ore or supply trips.
§ 57.9261 Transporting tools and materials on locomotives.
Tools or materials shall not be carried on top of locomotives underground
except for secured rerailing devices located in a manner which does not create a hazard to persons.
SAFETY DEVICES, PROVISIONS, AND PROCEDURES FOR ROADWAYS, RAILROADS,
AND LOADING AND DUMPING SITES
kpayne on VMOFRWIN702 with $$_JOB
§ 57.9300
Berms or guardrails.
(a) Berms or guardrails shall be provided and maintained on the banks of
roadways where a drop-off exists of sufficient grade or depth to cause a vehicle to overturn or endanger persons in
equipment.
(b) Berms or guardrails shall be at
least mid-axle height of the largest
self-propelled mobile equipment which
usually travels the roadway.
(c) Berms may have openings to the
extent necessary for roadway drainage.
(d) Where elevated roadways are infrequently traveled and used only by
service or maintenance vehicles, berms
or guardrails are not required when all
of the following are met:
(1) Locked gates are installed at the
entrance points to the roadway.
(2) Signs are posted warning that the
roadway is not bermed.
(3) Delineators are installed along
the perimeter of the elevated roadway
so that, for both directions of travel,
the reflective surfaces of at least three
delineators along each elevated shoulder are always visible to the driver and
spaced at intervals sufficient to indicate the edges and attitude of the roadway.
(4) A maximum speed limit is posted
and observed for the elevated unbermed
portions of the roadway. Factors to
consider when establishing the maximum speed limit shall include the
width, slope and alignment of the road,
the type of equipment using the road,
the road material, and any hazardous
conditions which may exist.
(5) Road surface traction is not impaired by weather conditions, such as
sleet and snow, unless corrective measures, such as the use of tire chains,
plowing, or sanding, are taken to improve traction.
(e) This standard is not applicable to
rail beds.
[53 FR 32526, Aug. 25, 1988, as amended at 55
FR 37218, Sept. 7, 1990]
§ 57.9301
Dump site restraints.
Berms, bumper blocks, safety hooks,
or similar impeding devices shall be
provided at dumping locations where
there is a hazard of overtravel or overturning.
§ 57.9302 Protection against moving or
runaway railroad equipment.
Stopblocks, derail devices, or other
devices that protect against moving or
runaway rail equipment shall be installed wherever necessary to protect
persons.
§ 57.9303 Construction of ramps and
dumping facilities.
Ramps and dumping facilities shall
be designed and constructed of materials capable of supporting the loads to
which they will be subjected. The
ramps and dumping facilities shall provide width, clearance, and headroom to
safely accommodate the mobile equipment using the facilities.
§ 57.9304
Unstable ground.
(a) Dumping locations shall be visually inspected prior to work commencing and as ground conditions warrant.
(b) Where there is evidence that the
ground at a dumping location may fail
to support the mobile equipment, loads
shall be dumped a safe distance back
from the edge of the unstable area of
the bank.
§ 57.9305
Truck spotters.
(a) If truck spotters are used, they
shall be in the clear while trucks are
backing into dumping position or
dumping.
(b) Spotters shall use signal lights to
direct trucks where visibility is limited.
(c) When a truck operator cannot
clearly recognize the spotter’s signals,
the truck shall be stopped.
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Mine Safety and Health Admin., Labor
§ 57.9306 Warning devices
stricted clearances.
for
re-
Where restricted clearance creates a
hazard to persons on mobile equipment, warning devices shall be installed in advance of the restricted
area and the restricted area shall be
conspicuously marked.
§ 57.9307 Design,
installation,
maintenance of railroads.
and
Roadbeds and all elements of the
railroad tracks shall be designed, installed, and maintained to provide safe
operation consistent with the speed
and type of haulage used.
§ 57.9308
Chute design.
Chute-loading installations shall be
designed to provide a safe location for
persons pulling chutes.
§ 57.9310
Chute hazards.
(a) Prior to chute-pulling, persons
who could be affected by the draw or
otherwise exposed to danger shall be
warned and given time to clear the hazardous area.
(b) Persons attempting to free chute
hangups shall be experienced and familiar with the task, know the hazards
involved, and use the proper tools to
free material.
(c) When broken rock or material is
dumped into an empty chute, the chute
shall be equipped with a guard or all
persons shall be isolated from the hazard of flying rock or material.
§ 57.9311 Anchoring stationary sizing
devices.
Grizzlies and other stationary sizing
devices shall be securely anchored.
kpayne on VMOFRWIN702 with $$_JOB
§ 57.9312
§ 57.9313
Roadway maintenance.
Water, debris, or spilled material on
roadways which creates hazards to the
operation of mobile equipment shall be
removed.
§ 57.9314 Trimming
muckpile faces.
stockpile
Working around drawholes.
Unless platforms or safety lines are
used, persons shall not position themselves over drawholes if there is danger
that broken rock or material may be
withdrawn or bridged.
Stockpile and muckpile faces shall be
trimmed to prevent hazards to persons.
§ 57.9315
Dust control.
Dust shall be controlled at muck
piles,
material
transfer
points,
crushers, and on haulage roads where
hazards to persons would be created as
a result of impaired visibility.
§ 57.9316 Notifying the equipment operator.
When an operator of self-propelled
mobile equipment is present, persons
shall notify the equipment operator before getting on or off that equipment.
§ 57.9317
Suspended loads.
Persons shall not work or pass under
the buckets or booms of loaders in operation.
§ 57.9318 Getting
equipment.
on
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moving
Persons shall not get on or off moving mobile equipment. This provision
does not apply to trainmen, brakemen,
and car droppers who are required to
get on or off slowly moving trains in
the performance of their work duties.
§ 57.9319 Going over, under, or between railcars.
Persons shall not go over, under, or
between railcars unless—
(a) The train is stopped; and
(b) The train operator, when present,
is notified and the notice acknowledged.
§ 57.9330 Clearance for surface equipment.
Continuous clearance of at least 30
inches from the farthest projection of
moving railroad equipment shall be
provided on at least one side of the
tracks at all locations where possible
or the area shall be marked conspicuously.
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Switch throws.
Switch throws shall be installed to
provide clearance to protect switchmen
from contact with moving trains.
§ 57.9309
§ 57.9330
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§ 57.9360
§ 57.9360
30 CFR Ch. I (7–1–19 Edition)
Shelter holes.
(a) Shelter holes shall be—
(1) Provided at intervals adequate to
assure the safety of persons along underground haulageways where continuous clearance of at least 30 inches
cannot be maintained from the farthest
projection of moving equipment on at
least one side of the haulageway; and
(2) At least four feet wide, marked
conspicuously, and provide a minimum
40-inch clearance from the farthest projection of moving equipment.
(b) Shelter holes shall not be used for
storage unless a 40-inch clearance is
maintained.
§ 57.9361
Drawholes.
To prevent hazards to persons underground, collars of open drawholes shall
be free of muck or materials except
during transfer of the muck or material through the drawhole.
§ 57.9362
Protection of signalmen.
Signalmen used during slushing operations underground shall be located
away from possible contact with cables, sheaves, and slusher buckets.
Subpart I—Aerial Tramways
§ 57.10001
Filling buckets.
Buckets shall not be overloaded, and
feed shall be regulated to prevent spillage.
§ 57.10002 Inspection
nance.
and
Correction of defects.
Any hazardous defects shall be corrected before the equipment is used.
kpayne on VMOFRWIN702 with $$_JOB
§ 57.10004
§ 57.10006 Tower guards.
Towers shall be suitably protected
from swaying buckets.
§ 57.10007 Falling object protection.
Guard nets or other suitable protection shall be provided where tramways
pass over roadways, walkways, or
buildings.
§ 57.10008 Riding tramways.
Persons other than maintenance persons shall not ride aerial tramways unless the following features are provided.
(a) Two independent brakes, each capable of holding the maximum load;
(b) Direct communication between
terminals;
(c) Power drives with emergency
power available in case of primary
power failure; and
(d) Buckets equipped with positive
locks to prevent accidental tripping or
dumping.
§ 57.10009 Riding loaded buckets.
Persons shall not ride loaded buckets.
§ 57.10010 Starting precautions.
Where possible, aerial tramways
shall not be started until the operator
has ascertained that everyone is in the
clear.
mainte-
Inspection and maintenance of carriers (including loading and unloading
mechanisms), ropes and supports, and
brakes shall be performed by competent persons according to the recommendations of the manufacturer.
§ 57.10003
§ 57.10005 Track cable connections.
Track cable connections shall not obstruct the passage of carriage wheels.
Brakes.
Positive-action-type brakes and devices which apply the brakes automatically in the event of a power failure
shall be provided on aerial tramways.
Subpart J—Travelways and
Escapeways
TRAVELWAYS—SURFACE AND
UNDERGROUND
§ 57.11001 Safe access.
Safe means of access shall be provided and maintained to all working
places.
§ 57.11002 Handrails and toeboards.
Crossovers, elevated walkways, elevated ramps, and stairways shall be of
substantial construction, provided with
handrails, and maintained in good condition. Where necessary, toeboards
shall be provided.
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Mine Safety and Health Admin., Labor
§ 57.11003 Construction
nance of ladders.
and
mainte-
Ladders shall be of substantial construction and maintained in good condition.
§ 57.11004
Portable rigid ladders.
Portable rigid ladders shall be provided with suitable bases and placed securely when used.
§ 57.11012 Protection
for
openings
around travelways.
Openings above, below, or near
travelways through which persons or
materials may fall shall be protected
by railings, barriers, or covers. Where
it is impractical to install such protective devices, adequate warning signals
shall be installed.
§ 57.11005 Fixed ladder anchorage and
toe clearance.
§ 57.11013 Conveyor crossovers.
Crossovers shall be provided where it
is necessary to cross conveyors.
Fixed ladders shall be anchored securely and installed to provide at least
3 inches of toe clearance.
§ 57.11014 Crossing moving conveyors.
Moving conveyors shall be crossed
only at designated crossover points.
§ 57.11006
§ 57.11016 Snow and ice on walkways
and travelways.
Regularly
used
walkways
and
travelways shall be sanded, salted, or
cleared of snow and ice as soon as practicable.
Fixed ladder landings.
Fixed ladders shall project at least 3
feet above landings, or substantial
handholds shall be provided above the
landings.
§ 57.11007
ders.
Wooden components of lad-
Wooden components of ladders shall
not be painted except with a transparent finish.
§ 57.11008
Restricted clearance.
Where restricted clearance creates a
hazard to persons, the restricted clearance shall be conspicuously marked.
[53 FR 32528, Aug. 25, 1988]
§ 57.11009
Walkways along conveyors.
Walkways with outboard railings
shall be provided wherever persons are
required to walk alongside elevated
conveyor belts. Inclined railed walkways shall be nonskid or provided with
cleats.
§ 57.11010
Stairstep clearance.
Vertical clearance above stair steps
shall be a minimum of seven feet, or
suitable warning signs or similar devices shall be provided to indicate an
impaired clearance.
§ 57.11011
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§ 57.11027
Use of ladders.
Persons using ladders shall face the
ladders and have both hands free for
climbing and descending.
§ 57.11017 Inclined fixed ladders.
Fixed ladders shall not incline backwards.
TRAVELWAYS—SURFACE ONLY
§ 57.11025 Railed
landings,
backguards, and other protection
for fixed ladders.
Fixed ladders, except on mobile
equipment, shall be offset and have
substantial railed landings at least
every 30 feet unless backguards or
equivalent protection such as safety
belts and safety lines, are provided.
§ 57.11026 Protection for inclined fixed
ladders.
Fixed ladders 70 degrees to 90 degrees
from the horizonal and 30 feet or more
in length shall have backguards, cages
or equivalent protection, starting at a
point not more than seven feet from
the bottom of the ladders.
§ 57.11027 Scaffolds and working platforms.
Scaffolds and working platforms
shall be of substantial construction
and provided with handrails and maintained in good condition. Floorboards
shall be laid properly and the scaffolds
and working platform shall not be
overloaded. Working platforms shall be
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§ 57.11036
provided
essary.
with
30 CFR Ch. I (7–1–19 Edition)
toeboards
when
nec-
TRAVELWAYS—UNDERGROUND ONLY
§ 57.11036 Ladderway trap doors and
guards.
Trap doors or adequate guarding
shall be provided in ladderways at each
level. Doors shall be kept operable.
§ 57.11037 Ladderway openings.
Ladderways constructed after November 15, 1979, shall have a minimum
unobstructed cross-sectional opening of
24 inches by 24 inches measured from
the face of the ladder.
escapeways within a time limit of one
hour when using the normal exit method. These refuges must be positioned so
that the employee can reach one of
them within 30 minutes from the time
he leaves his workplace.
§ 57.11051
Escape routes shall be—
(a) Inspected at regular intervals and
maintained in safe, travelable condition; and
(b) Marked with conspicuous and easily read direction signs that clearly indicate the ways of escape.
§ 57.11052
§ 57.11038 Entering a manway.
Before entering a manway where persons may be working or traveling, a
warning shall be given by the person
entering the manway and acknowledged by any person present in the
manway.
§ 57.11040 Inclined travelways.
Travelways steeper than 35 degrees
from the horizontal shall be provided
with ladders or stairways.
§ 57.11041 Landings
for
inclined
ladderways.
Fixed ladders with an inclination of
more than 70 degrees from the horizontal shall be offset with substantial
landings at least every 30 feet or have
landing gates at least every 30 feet.
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ESCAPEWAYS—UNDERGROUND ONLY
§ 57.11050 Escapeways and refuges.
(a) Every mine shall have two or
more separate, properly maintained
escapeways to the surface from the
lowest levels which are so positioned
that damage to one shall not lessen the
effectiveness of the others. A method of
refuge shall be provided while a second
opening to the surface is being developed. A second escapeway is recommended, but not required, during
the exploration or development of an
ore body.
(b)
In
addition
to
separate
escapeways, a method of refuge shall be
provided for every employee who cannot reach the surface from his working
place through at least two separate
Escape routes.
Refuge areas.
Refuge areas shall be—
(a) Of fire-resistant construction,
preferably in untimbered areas of the
mine;
(b) Large enough to accommodate
readily the normal number of persons
in the particular area of the mine;
(c) Constructed so they can be made
gastight; and
(d) Provided with compressed air
lines, waterlines, suitable handtools,
and stopping materials.
§ 57.11053 Escape
plans.
and
A specific escape and evacuation plan
and revisions thereof suitable to the
conditions and mining system of the
mine and showing assigned responsibilities of all key personnel in the event
of an emergency shall be developed by
the operator and set out in written
form. Within 45 calendar days after
promulgation of this standard a copy of
the plan and revisions thereof shall be
available to the Secretary or his authorized representative. Also, copies of
the plan and revisions thereof shall be
posted at locations convenient to all
persons on the surface and underground. Such a plan shall be updated as
necessary and shall be reviewed jointly
by the operator and the Secretary or
his authorized representative at least
once every six months from the date of
the last review. The plan shall include:
(a) Mine maps or diagrams showing
directions of principal air flow, location of escape routes and locations of
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Mine Safety and Health Admin., Labor
§ 57.11059
existing telephones, primary fans, primary fan controls, fire doors, ventilation doors, and refuge chambers. Appropriate portions of such maps or diagrams shall be posted at all shaft stations and in underground shops,
lunchrooms, and elsewhere in working
areas where persons congregate;
(b) Procedures to show how the miners will be notified of emergency;
(c) An escape plan for each working
area in the mine to include instructions showing how each working area
should be evacuated. Each such plan
shall be posted at appropriate shaft
stations and elsewhere in working
areas where persons congregate;
(d) A fire fighting plan;
(e) Surface procedure to follow in an
emergency, including the notification
of proper authorities, preparing rescue
equipment, and other equipment which
may be used in rescue and recovery operations; and
(f) A statement of the availability of
emergency communication and transportation facilities, emergency power
and ventilation and location of rescue
personnel and equipment.
an accurate record of persons in the
mine. These records shall be kept on
the surface in a place chosen to minimize the danger of destruction by fire
or other hazards. Every person underground shall carry a positive means of
being identified.
[50 FR 4082, Jan. 29, 1985, as amended at 60
FR 33722, June 29, 1995]
§ 57.11054 Communication with refuge
chambers.
Telephone or other voice communication shall be provided between the surface and refuge chambers and such systems shall be independent of the mine
power supply.
§ 57.11055 Inclined escapeways.
Any
portion
of
a
designated
escapeway which is inclined more than
30 degrees from the horizontal and that
is more than 300 feet in vertical extent
shall be provided with an emergency
hoisting facility.
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§ 57.11056 Emergency hoists.
The procedure for inspection, testing
and maintenance required by standard
57.19120 shall be utilized at least every
30 days for hoists designated as emergency hoists in any evacuation plan.
§ 57.11058 Check-in, check-out system.
Each operator of an underground
mine shall establish a check-in and
check-out system which shall provide
§ 57.11059 Respirable atmosphere for
hoist operators underground.
For the protection of operators of
hoists located underground which are
part of the mine escape and evacuation
plan required under standard 57.11053,
the hoist operator shall be provided
with a respirable atmosphere completely independent of the mine atmosphere. This independent ventilation
system shall convert, without contamination, to an approved and properly
maintained
2-hour
self-contained
breathing apparatus to provide a safe
means of escape for the hoist operator
after the hoisting duties have been
completed as prescribed in the mine escape and evacuation plan for that
hoist. The hoist operator’s independent
ventilation system shall be provided by
one of the following methods:
(a) A suitable enclosure equipped
with a positive pressure ventilation
system which may be operated continuously or be capable of immediate
activation from within the enclosure
during an emergency evacuation. Air
for the enclosure’s ventilation system
shall be provided in one of the following ways:
(1) Air coursed from the surface
through a borehole into the hoist enclosure directly or through a metal
pipeline from such borehole; or
(2) Air coursed from the surface
through metal duct work into the hoist
enclosure, although this duct work
shall not be located in timber-supported active workings; or
(3) Air supplied by air compressors
located on the surface and coursed
through metal pipe into the hoist enclosure.
A back-up system shall be provided
for a hoist enclosure ventilation system provided by either of the methods
set forth in paragraphs (a) (2) and (3) of
this section. This back-up system shall
consist of compressed air stored in containers connected to the enclosure.
This back-up system shall provide and
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§ 57.12001
30 CFR Ch. I (7–1–19 Edition)
maintain a respirable atmosphere in
the enclosure for a period of time equal
to at least twice the time necessary to
complete the evacuation of all persons
designated to use that hoist as prescribed in the mine escape and evacuation plan required under standard
57.11053; or
(b) An approved and properly maintained self-contained breathing apparatus system which shall consist of a
mask connected to compressed air
stored in containers adjacent to the
hoist controls. The self-contained
breathing system shall provide a minimum of 24 hours of respirable atmosphere to the hoist operator. In addition, the self-contained breathing system shall be capable of a quick connect
with the approved 2-hour self-contained
breathing apparatus above.
Subpart K—Electricity
§ 57.12006
Distribution boxes.
Distribution boxes shall be provided
with a disconnecting device for each
branch circuit. Such disconnecting devices shall be equipped or designed in
such a manner that it can be determined by visual observation when such
a device is open and that the circuit is
deenergized, and the distribution box
shall be labeled to show which circuit
each device controls.
§ 57.12007 Junction
procedures.
box
§ 57.12001 Circuit overload protection.
Circuits shall be protected against
excessive overloads by fuses or circuit
breakers of the correct type and capacity.
§ 57.12002 Controls and switches.
Electric equipment and circuits shall
be provided with switches or other controls. Such switches or controls shall
be of approved design and construction
and shall be properly installed.
§ 57.12003 Trailing cable overload protection.
Individual overload protection or
short circuit protection shall be provided for the trailing cables of mobile
equipment.
§ 57.12004 Electrical conductors.
Electrical conductors shall be of a
sufficient size and current-carrying capacity to ensure that a rise in temperature resulting from normal operations
will not damage the insulating materials. Electrical conductors exposed to
mechanical damage shall be protected.
§ 57.12005 Protection of power conductors from mobile equipment.
Mobile equipment shall not run over
power conductors, nor shall loads be
Trailing cable and power-cable connections to junction boxes shall not be
made or broken under load.
Power wires and cables shall be insulated adequately where they pass into
or out of electrical compartments. Cables shall enter metal frames of motors, splice boxes, and electrical compartments only through proper fittings. When insulated wires, other than
cables, pass through metal frames, the
holes shall be substantially bushed
with insulated bushings.
§ 57.12010 Isolation or insulation
communication conductors.
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Telephone and low-potential signal
wire shall be protected, by isolation or
suitable insulation, or both, from contacting energized power conductors or
any other power source.
§ 57.12011 High-potential
conductors.
electrical
High-potential electrical conductors
shall be covered, insulated, or placed to
prevent contact with low potential
conductors.
§ 57.12012
Bare signal wires.
The potential on bare signal wires accessible to contact by persons shall not
exceed 48 volts.
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connection
§ 57.12008 Insulation and fittings for
power wires and cables.
SURFACE AND UNDERGROUND
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dragged over power conductors, unless
the conductors are properly bridged or
protected.
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Mine Safety and Health Admin., Labor
§ 57.12025
§ 57.12013 Splices and repairs of power
cables.
Permanent splices and repairs made
in power cables, including the ground
conductor where provided, shall be—
(a) Mechanically strong with electrical conductivity as near as possible
to that of the original;
(b) Insulated to a degree at least
equal to that of the original, and sealed
to exclude moisture; and,
(c) Provided with damage protection
as near as possible to that of the original, including good bonding to the
outer jacket.
Switches shall be locked out or other
measures taken which shall prevent
the power circuits from being energized
without the knowledge of the individuals working on them. Such locks,
signs, or preventive devices shall be removed only by the person who installed
them or by authorized personnel.
§ 57.12014 Handling energized power
cables.
Power cables energized to potentials
in excess of 150 volts, phase-to-ground,
shall not be moved with equipment unless sleds or slings, insulated from such
equipment, are used. When such energized cables are moved manually, insulated hooks, tongs, ropes, or slings
shall be used unless suitable protection
for persons is provided by other means.
This does not prohibit pulling or dragging of cable by the equipment it powers when the cable is physically attached to the equipment by suitable
mechanical devices, and the cable is insulated from the equipment in conformance with other standards in this
part.
§ 57.12019 Access to stationary electrical equipment or switchgear.
Where access is necessary, suitable
clearance shall be provided at stationary
electrical
equipment
or
switchgear.
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§ 57.12016 Work on electrically-powered equipment.
Electrically powered equipment shall
be deenergized before mechanical work
is done on such equipment. Power
switches shall be locked out or other
measures taken which shall prevent
the equipment from being energized
without the knowledge of the individuals working on it. Suitable warning
notices shall be posted at the power
switch and signed by the individuals
who are to do the work. Such locks or
preventive devices shall be removed
only by the persons who installed them
or by authorized personnel.
§ 57.12017 Work on power circuits.
Power circuits shall be deenergized
before work is done on such circuits
unless hot-line tools are used. Suitable
warning signs shall be posted by the individuals who are to do the work.
§ 57.12018 Identification
of
power
switches.
Principal power switches shall be labeled to show which units they control,
unless identification can be made readily by location.
§ 57.12020 Protection of persons at
switchgear.
Dry wooden platforms, insulating
mats, or other electrically-nonconductive material shall be kept in place at
all switchboards and power-control
switches where shock hazards exist.
However, metal plates on which a person normally would stand and which
are kept at the same potential as the
grounded, metal, non-current-carrying
parts of the power switches to be operated may be used.
§ 57.12021 Danger signs.
Suitable danger signs shall be posted
at all major electrical installations.
§ 57.12022 Authorized persons at major
electrical installations.
Areas containing major electrical installations shall be entered only by authorized persons.
§ 57.12023 Guarding electrical connections and resistor grids.
Electrical connections and resistor
grids that are difficult or impractical
to insulate shall be guarded, unless
protection is provided by location.
§ 57.12025 Grounding circuit enclosures.
All metal enclosing or encasing electrical circuits shall be grounded or provided with equivalent protection. This
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§ 57.12026
30 CFR Ch. I (7–1–19 Edition)
requirement does not apply to batteryoperated equipment.
§ 57.12026 Grounding transformer and
switchgear enclosures.
Metal fencing and metal buildings
enclosing transformers and switchgear
shall be grounded.
§ 57.12027 Grounding mobile equipment.
Frame grounding or equivalent protection shall be provided for mobile
equipment powered through trailing
cables.
§ 57.12028 Testing grounding systems.
Continuity and resistance of grounding systems shall be tested immediately after installation, repair, and
modification; and annually thereafter.
A record of the resistance measured
during the most recent test shall be
made available on a request by the Secretary or his duly authorized representative.
§ 57.12030 Correction of dangerous
conditions.
When a potentially dangerous condition is found it shall be corrected before equipment or wiring is energized.
§ 57.12032 Inspection and cover plates.
Inspection and cover plates on electrical equipment and junction boxes
shall be kept in place at all times except during testing or repairs.
§ 57.12037
cuits.
Fuses in high-potential cir-
Fuse tongs or hotline tools, shall be
used when fuses are removed or replaced in high-potential circuits.
§ 57.12038
bles.
Attachment of trailing ca-
Trailing cables shall be attached to
machines in a suitable manner to protect the cable from damage and to prevent strain on the electrical connections.
§ 57.12039 Protection of surplus trailing cables.
Surplus trailing cables to shovels,
cranes and similar equipment shall
be—
(a) Stored in cable boats;
(b) Stored on reels mounted on the
equipment; or
(c) Otherwise protected from mechanical damage.
§ 57.12040 Installation
controls.
§ 57.12041 Design
starting boxes.
§ 57.12034 Guarding around lights.
Portable extension lights, and other
lights that by their location present a
shock or burn hazard, shall be guarded.
§ 57.12042
§ 57.12036 Fuse removal or replacement.
Fuses shall not be removed or replaced by hand in an energized circuit,
of
of
switches
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Switches and starting boxes shall be
of safe design and capacity.
Track bonding.
Both rails shall be bonded or welded
at every joint and rails shall be
crossbonded at least every 200 feet if
the track serves as the return trolley
circuit. When rails are moved, replaced, or broken bonds are discovered,
they shall be rebonded within three
working shifts.
§ 57.12045
Overhead powerlines.
Overhead high-potential powerlines
shall be installed as specified by the
National Electrical Code.
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Operating controls shall be installed
so that they can be operated without
danger of contact with energized conductors.
§ 57.12033 Hand-held electric tools.
Hand-held electric tools shall not be
operated at high potential voltages.
§ 57.12035 Weatherproof lamp sockets.
Lamp sockets shall be of a weatherproof type where they are exposed to
weather or wet conditions that may
interfere with illumination or create a
shock hazard.
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and they shall not otherwise be removed or replaced in an energized circuit unless equipment and techniques
especially designed to prevent electrical shock are provided and used for
such purpose.
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Mine Safety and Health Admin., Labor
§ 57.12047
SURFACE ONLY
Guy wires.
Guy wires of poles supporting highvoltage transmission lines shall meet
the requirements for grounding or insulator protection of the National
Electrical Safety Code, part 2, entitled
‘‘Safety Rules for the Installation and
Maintenance of Electric Supply and
Communication Lines’’ (also referred
to as National Bureau of Standards
Handbook 81, Nov. 1, 1961), and Supplement 2 thereof issued March 1968,
which are hereby incorporated by reference and made a part hereof. These
publications and documents may be obtained from the National Institute of
Science and Technology, 100 Bureau
Drive, Stop 3460, Gaithersburg, MD
20899–3460. Telephone: 301–975–6478 (not
a toll free number); http://ts.nist.gov/nvl;
or from the Government Printing Office, Information Dissemination (Superintendent of Documents), P.O. Box
371954, Pittsburgh, PA 15250–7954; Telephone: 866–512–1800 (toll free) or 202–512–
1800; http://bookstore.gpo.gov, or may be
examined in any Metal and Nonmetal
Mine Safety and Health District Office
of the Mine Safety and Health Administration.
[53 FR 32526, Aug. 25, 1988, as amended at 60
FR 35695, July 11, 1995; 71 FR 16667, Apr. 3,
2006]
§ 57.12048 Communication conductors
on power poles.
Telegraph, telephone, or signal wires
shall not be installed on the same
crossarm with power conductors. When
carried on poles supporting powerlines,
they shall be installed as specified by
the National Electrical Code.
§ 57.12050
Installation of trolley wires.
Trolley wires shall be installed at
least seven feet above rails where
height permits, and aligned and supported to suitably control sway and
sag.
§ 57.12053 Circuits powered from trolley wires.
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§ 57.12071
Ground wires for lighting circuits
powered from trolley wires shall be
connected securely to the ground return circuit.
§ 57.12065 Short circuit and lightning
protection.
Powerlines, including trolley wires,
and telephone circuits shall be protected against short circuits and lightning.
§ 57.12066 Guarding trolley wires and
bare powerlines.
Where metallic tools or equipment
can come in contact with trolley wires
or bare powerlines, the lines shall be
guarded or deenergized.
§ 57.12067
Installation of transformers.
Transformers shall be totally enclosed, or shall be placed at least 8 feet
above the ground, or installed in a
transformer house, or surrounded by a
substantial fence at least 6 feet high
and at least 3 feet from any energized
parts, casings, or wiring.
§ 57.12068 Locking transformer enclosures.
Transformer enclosures shall be kept
locked against unauthorized entry.
§ 57.12069 Lightning protection for
telephone wires and ungrounded
conductors.
Each ungrounded conductor or telephone wire that leads underground and
is directly exposed to lightning shall be
equipped with suitable lightning arrestors of approved type within 100 feet of
the point where the circuit enters the
mine. Lightning arrestors shall be connected to a low resistance grounding
medium on the surface and shall be
separated from neutral grounds by a
distance of not less than 25 feet.
§ 57.12071 Movement or operation of
equipment
near
high-voltage
powerlines.
When equipment must be moved or
operated near energized high-voltage
powerlines (other than trolley lines)
and the clearance is less than 10 feet,
the lines shall be deenergized or other
precautionary measures shall be taken.
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§ 57.12080
30 CFR Ch. I (7–1–19 Edition)
UNDERGROUND ONLY
§ 57.12080
Bare conductor guards.
Trolley wires and bare power conductors shall be guarded at mantrip loading and unloading points, and at shaft
stations. Where such trolley wires and
bare power conductors are less than 7
feet above the rail, they shall be guarded at all points where persons work or
pass regularly beneath.
§ 57.12081 Bonding metal pipelines to
ground return circuits.
All metal pipelines, 1,000 feet or more
in length running parallel to trolley
tracks, that are used as a ground return circuit shall be bonded to the return circuit rail at the ends of the pipeline and at intervals not to exceed 500
feet.
§ 57.12082
Isolation of powerlines.
Powerlines shall be well separated or
insulated from waterlines, telephone
lines and air lines.
§ 57.12083 Support of power cables in
shafts and boreholes.
Power cables in shafts and boreholes
shall be fastened securely in such a
manner as to prevent undue strain on
the sheath, insulation, or conductors.
§ 57.12084 Branch
circuit
connecting devices.
dis-
Disconnecting switches that can be
opened safely under load shall be provided underground at all branch circuits extending from primary power
circuits near shafts, adits, levels and
boreholes.
§ 57.12085
Transformer stations.
Transformer stations shall be enclosed to prevent persons from unintentionally or inadvertently contacting energized parts.
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§ 57.12086
Location of trolley wire.
Trolley and trolley feeder wire shall
be installed opposite the clearance side
of haulageways. However, this standard
does not apply where physical limitations would prevent the safe installation or use of such trolley and trolley
feeder wire.
§ 57.12088 Splicing trailing cables.
No splice, except a vulcanized splice
or its equivalent, shall be made in a
trailing cable within 25 feet of the machine unless the machine is equipped
with a cable reel or other power feed
cable payout-retrieval system. However, a temporary splice may be made
to move the equipment for repair.
Subpart L—Compressed Air and
Boilers
§ 57.13001 General requirements for
boilers and pressure vessels.
All boilers and pressure vessels shall
be constructed, installed, and maintained in accordance with the standards and specifications of the American
Society of Mechanical Engineers Boiler
and Pressure Vessel Code.
§ 57.13010 Reciprocating-type air compressors.
(a) Reciprocating-type air compressors rated over 10 horsepower shall be
equipped with automatic temperatureactuated shutoff mechanisms which
shall be set or adjusted to the compressor when the normal operating
temperature is exceeded by more than
25 percent.
(b) However, this standard does not
apply to reciprocating-type air compressors rated over 10 horsepower if
equipped with fusible plugs that were
installed in the compressor discharge
lines before November 15, 1979, and designed to melt at temperatures at least
50 degrees below the flash point of the
compressors’ lubricating oil.
§ 57.13011 Air receiver tanks.
Air receiver tanks shall be equipped
with one or more automatic pressurerelief valves. The total relieving capacity of the relief valves shall prevent
pressure from exceeding the maximum
allowable working pressure in a receiver tank by not more than 10 percent. Air receiver tanks also shall be
equipped with indicating pressure
gages which accurately measure the
pressure within the air receiver tanks.
§ 57.13012 Compressor air intakes.
Compressor air intakes shall be installed to ensure that only clean,
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Mine Safety and Health Admin., Labor
§ 57.13030
uncontaminated air enters the compressors.
ameter or larger, and between highpressure hose lines of 3⁄4-inch inside diameter or larger, where a connection
failure would create a hazard.
§ 57.13015 Inspection of compressedair receivers and other unfired
pressure vessels.
(a) Compressed-air receivers and
other unfired pressure vessels shall be
inspected by inspectors holding a valid
National Board Commission and in accordance with the applicable chapters
of the National Board Inspection Code,
a Manual for Boiler and Pressure Vessel Inspectors, 1979. This code is incorporated by reference and made a part
of this standard. It may be examined at
any Metal and Nonmetal Mine Safety
and Health District Office of the Mine
Safety and Health Administration, and
may be obtained from the publisher,
the National Board of Boiler and Pressure Vessel Inspectors, 1055 Crupper
Avenue, Columbus, Ohio 43229.
(b) Records of inspections shall be
kept in accordance with requirements
of the National Board Inspection Code,
and the records shall be made available
to the Secretary or his authorized representative.
§ 57.13017 Compressor
discharge
pipes.
Compressor discharge pipes where
carbon build-up may occur shall be
cleaned periodically as recommended
by the manufacturer, but no less frequently than once every two years.
§ 57.13019 Pressure system repairs.
Repairs involving the pressure system of compressors, receivers, or compressed-air-powered equipment shall
not be attempted until the pressure has
been bled off.
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§ 57.13020 Use of compressed air.
At no time shall compressed air be
directed toward a person. When compressed air is used, all necessary precautions shall be taken to protect persons from injury.
§ 57.13021 High-pressure hose connections.
Except where automatic shutoff
valves are used, safety chains or other
suitable locking devices shall be used
at connections to machines of highpressure hose lines of 3⁄4-inch inside di-
§ 57.13030
Boilers.
(a) Fired pressure vessels (boilers)
shall be equipped with water level
gauges, pressure gauges, automatic
pressure-relief valves, blowdown piping, and other safety devices approved
by the American Society of Mechanical
Engineers to protect against hazards
from overpressure, flameouts, fuel
interruptions and low water level, all
as required by the appropriate sections,
chapters and appendices listed in paragraphs (b) (1) and (2) of this section.
(b) These gauges, devices and piping
shall be designed, installed, operated,
maintained, repaired, altered, inspected, and tested by inspectors holding a valid National Board Commission
and in accordance with the following
listed sections, chapters and appendices:
(1) The ASME Boiler and Pressure
Vessel Code, 1977, published by the
American Society of Mechanical Engineers.
SECTION AND TITLE
I Power Boilers
II Material Specifications—Part A—Ferrous
II Material Specifications—Part B—Nonferrous
II Material Specifications—Part C—Welding Rods, Electrodes, and Filler Metals
IV Heating Boilers
V Nondestructive Examination
VI Recommended Rules for Care and Operation of Heating Boilers
VII Recommended Rules for Care of Power
Boilers
(2) The National Board Inspection
Code, a Manual for Boiler and Pressure
Vessel Inspectors, 1979, published by
the National Board of Boiler and Pressure Vessel Inspectors.
CHAPTER AND TITLE
I Glossary of Terms
II Inspection of Boilers and Pressure Vessels
III Repairs and Alterations to Boiler and
Pressure Vessels by Welding
IV Shop Inspection of Boilers and Pressure
Vessels
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§ 57.14000
V
30 CFR Ch. I (7–1–19 Edition)
Inservice Inspection of Pressure Vessels
by Authorized Owner-User Inspection
Agencies
APPENDIX AND TITLE
A Safety and Safety Relief Valves
B Non-ASME Code Boilers and Pressure
Vessels
C Storage of Mild Steel Covered Arc Welding Electrodes
D-R National Board ‘‘R’’ (Repair) Symbol
Stamp
D-VR National Board ‘‘VR’’ (Repair of Safety and Safety Relief Valve) Symbol Stamp
D-VR1 Certificate of Authorization for Repair Symbol Stamp for Safety and Safety
Relief Valves
D-VR2 Outline of Basic Elements of Written
Quality Control System for Repairers of
ASME Safety and Safety Relief Valves
D-VR3 Nameplate Stamping for ‘‘VR’’
E Owner-User Inspection Agencies
F Inspection Forms
(c) Records of inspections and repairs
shall be kept in accordance with the requirements of the ASME Boiler and
Pressure Vessel Code and the National
Board Inspection Code. The records
shall be made available to the Secretary or his authorized representative.
(d) Sections of the ASME Boiler and
Pressure Vessel Code, 1977, listed in
paragraph (b)(1) of this section, and
chapters and appendices of the National Board Inspection Code, 1979, listed in paragraph (b)(2) of this section,
are incorporated by reference and made
a part of this standard. These publications may be obtained from the publishers, the American Society of Mechanical Engineers, 22 Law Drive, P.O.
Box 2900, Fairfield, New Jersey 07007,
Phone: 800–843–2763 (toll free); http://
www.asme.org, and the National Board
of Boiler and Pressure Vessel Inspectors, 1055 Crupper Avenue, Columbus,
Ohio 43229. The publication may be examined at any Metal and Nonmetal
Mine Safety and Health District Office
of the Mine Safety and Health Administration.
[50 FR 4082, Jan. 29, 1985, as amended at 71
FR 16667, Apr. 3, 2006]
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Subpart M—Machinery and
Equipment
SOURCE: 53 FR 32528, Aug. 25, 1988, unless
otherwise noted.
§ 57.14000
Definitions.
The following definitions apply in
this subpart.
Travelway. A passage, walk, or way
regularly used or designated for persons to go from one place to another.
[53 FR 32528, Aug. 25, 1988, as amended at 69
FR 38842, June 29, 2004]
SAFETY DEVICES AND MAINTENANCE
REQUIREMENTS
§ 57.14100 Safety defects; examination,
correction and records.
(a) Self-propelled mobile equipment
to be used during a shift shall be inspected by the equipment operator before being placed in operation on that
shift.
(b) Defects on any equipment, machinery, and tools that affect safety
shall be corrected in a timely manner
to prevent the creation of a hazard to
persons.
(c) When defects make continued operation hazardous to persons, the defective items including self-propelled
mobile equipment shall be taken out of
service and placed in a designated area
posted for that purpose, or a tag or
other effective method of marking the
defective items shall be used to prohibit further use until the defects are
corrected.
(d) Defects on self-propelled mobile
equipment affecting safety, which are
not corrected immediately, shall be reported to, and recorded by, the mine
operator. The records shall be kept at
the mine or nearest mine office from
the date the defects are recorded, until
the defects are corrected. Such records
shall be made available for inspection
by an authorized representative of the
Secretary.
§ 57.14101
Brakes.
(a) Minimum requirements. (1) Self-propelled mobile equipment shall be
equipped with a service brake system
capable of stopping and holding the
equipment with its typical load on the
maximum grade it travels. This standard does not apply to equipment which
is not originally equipped with brakes
unless the manner in which the equipment is being operated requires the use
of brakes for safe operation. This
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Mine Safety and Health Admin., Labor
§ 57.14101
standard does not apply to rail equipment.
(2) If equipped on self-propelled mobile equipment, parking brakes shall be
capable of holding the equipment with
its typical load on the maximum grade
it travels.
(3) All braking systems installed on
the equipment shall be maintained in
functional condition.
(b) Testing. (1) Service brake tests
shall be conducted on surface-operated
equipment at underground mines when
an MSHA inspector has reasonable
cause to believe that the service brake
system does not function as required,
unless the mine operator removes the
equipment from service for the appropriate repair;
(2) The performance of the service
brakes shall be evaluated according to
Table M–1.
TABLE M–1
Equipment Speed, MPH
Gross vehicle weight lbs.
10
11
12
13
14
15
16
17
18
19
20
64
76
88
100
105
111
70
83
95
108
114
120
76
90
103
116
123
129
83
97
111
125
132
139
89
104
119
133
141
148
Service Brake Maximum Stopping Distance—Feet
0–36,000 ...........................................................
36,000–70,000 ..................................................
70,000–14,0000 ................................................
140,000–250,000 ..............................................
250,000–400,000 ..............................................
Over–400,000 ...................................................
34
41
48
56
59
63
38
46
54
62
66
71
43
52
61
69
74
78
48
58
67
77
81
86
53
62
74
84
89
94
59
70
81
92
97
103
Stopping distances are computed using a constant deceleration of 9.66 FPS 2 and system response times of .5.1, 1.5, 2, 2.25
and 2.5 seconds for each of increasing weight category respectively. Stopping distance values include a one-second operator response time.
TABLE M–2—THE SPEED OF A VEHICLE CAN BE DETERMINED BY CLOCKING IT THROUGH A 100FOOT MEASURED COURSE AT CONSTANT VELOCITY USING TABLE M–2. WHEN THE SERVICE
BRAKES ARE APPLIED AT THE END OF THE COURSE, STOPPING DISTANCE CAN BE MEASURED AND
COMPARED TO TABLE M–1.
Miles per hour
10
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Seconds required to travel 100 feet .................
11
6.8
12
6.2
(3) Service brake tests shall be conducted under the direction of the mine
operator in cooperation with and according to the instructions provided by
the MSHA inspector as follows:
(i) Equipment capable of traveling at
least 10 miles per hour shall be tested
with a typical load for that particular
piece of equipment. Front-end loaders
shall be tested with the loader bucket
empty. Equipment shall not be tested
when carrying hazardous loads, such as
explosives.
(ii) The approach shall be of sufficient length to allow the equipment operator to reach and maintain a constant speed between 10 and 20 miles per
hour prior to entering the 100 foot
measured area. The constant speed
shall be maintained up to the point
when the equipment operator receives
the signal to apply the brakes. The
roadway shall be wide enough to ac-
5.7
13
5.2
14
4.9
15
4.5
16
4.3
17
4.0
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3.8
19
3.6
20
3.4
commodate the size of the equipment
being tested. The ground shall be generally level, packed, and dry in the
braking portion of the test course.
Ground moisture may be present to the
extent that it does not adversely affect
the braking surface.
(iii) Braking is to be performed using
only those braking systems, including
auxiliary retarders, which are designed
to bring the equipment to a stop under
normal operating conditions. Parking
or emergency (secondary) brakes are
not to be actuated during the test.
(iv) The tests shall be conducted with
the transmission in the gear appropriate for the speed the equipment is
traveling except for equipment which
is designed for the power train to be
disengaged during braking.
(v) Testing speeds shall be a minimum of 10 miles per hour and a maximum of 20 miles per hour.
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§ 57.14102
30 CFR Ch. I (7–1–19 Edition)
(vi) Stopping distances shall be measured from the point at which the equipment operator receives the signal to
apply the service brakes to the final
stopped position.
(4) Test results shall be evaluated as
follows:
(i) If the initial test run is valid and
the stopping distance does not exceed
the corresponding stopping distance
listed in Table 1, the performance of
the service brakes shall be considered
acceptable. For tests to be considered
valid, the equipment shall not slide
sideways or exhibit other lateral motion during the braking portion of the
test.
(ii) If the equipment exceeds the
maximum stopping distance in the initial test run, the mine operator may
request from the inspector up to four
additional test runs with two runs to
be conducted in each direction. The
performance of the service brakes shall
be considered acceptable if the equipment does not exceed the maximum
stopping distance on at least three of
the additional tests.
(5) Where there is not an appropriate
test site at the mine or the equipment
is not capable of traveling at least 10
miles per hour, service brake tests will
not be conducted. In such cases, the inspector will rely upon other available
evidence to determine whether the
service brake system meets the performance requirements of this standard.
[53 FR 32528, Aug. 25, 1988; 53 FR 44588, Nov.
4, 1988]
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§ 57.14102 Brakes for rail equipment.
Braking systems on railroad cars and
locomotives shall be maintained in
functional condition.
§ 57.14103 Operators’ stations.
(a) If windows are provided on operators’ stations of self-propelled mobile
equipment, the windows shall be made
of safety glass or material with equivalent safety characteristics. The windows shall be maintained to provide
visibility for safe operation.
(b) If damaged windows obscure visibility necessary for safe operation, or
create a hazard to the equipment operator, the windows shall be replaced or
removed. Damaged windows shall be re-
placed if absence of a window would expose the equipment operator to hazardous environmental conditions which
would affect the ability of the equipment operator to safely operate the
equipment.
(c) The operators’ stations of selfpropelled mobile equipment shall—
(1) Be free of materials that may create a hazard to persons by impairing
the safe operation of the equipment;
and
(2) Not be modified, in a manner that
obscures visibility necessary for safe
operation.
§ 57.14104
Tire repairs.
(a) Before a tire is removed from a
vehicle for tire repair, the valve core
shall be partially removed to allow for
gradual deflation and then removed.
During deflation, to the extent possible, persons shall stand outside of the
potential trajectory of the lock ring of
a multi-piece wheel rim.
(b) To prevent injury from wheel
rims during tire inflation, one of the
following shall be used:
(1) A wheel cage or other restraining
device that will constrain all wheel rim
components during an explosive separation of a multi-piece wheel rim, or
during the sudden release of contained
air in a single piece rim wheel; or
(2) A stand-off inflation device which
permits persons to stand outside of the
potential trajectory of wheel components.
§ 57.14105 Procedures during repairs
or maintenance.
Repairs or maintenance on machinery or equipment shall be performed
only after the power is off, and the machinery or equipment blocked against
hazardous motion. Machinery or equipment motion or activation is permitted
to the extent that adjustments or testing cannot be performed without motion or activation, provided that persons are effectively protected from hazardous motion.
§ 57.14106
Falling object protection.
(a) Fork-lift trucks, front-end loaders, and bulldozers shall be provided
with falling object protective structures if used in an area where falling
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Mine Safety and Health Admin., Labor
§ 57.14115
objects could create a hazard to the operator.
(b) The protective structure shall be
capable of withstanding the falling object loads to which it could be subjected.
ers and anchored securely before
slushing operations are started to protect against hazardous movement before slushing operations are started.
(b) Slushers rated over 10 horsepower
shall be equipped with backlash guards,
unless the equipment operator is otherwise protected.
(c) This standard does not apply to
air tuggers of 10 horsepower or less
that have only one cable and one drum.
§ 57.14107 Moving machine parts.
(a) Moving machine parts shall be
guarded to protect persons from contacting gears, sprockets, chains, drive,
head,
tail,
and
takeup
pulleys,
flywheels, coupling, shafts, fan blades;
and similar moving parts that can
cause injury.
(b) Guards shall not be required
where the exposed moving parts are at
least seven feet away from walking or
working surfaces.
§ 57.14108 Overhead drive belts.
Overhead drive belts shall be guarded
to contain the whipping action of a
broken belt if that action could be hazardous to persons.
§ 57.14109 Unguarded conveyors with
adjacent travelways.
Unguarded
conveyors
next
to
travelways shall be equipped with—
(a) Emergency stop devices which are
located so that a person falling on or
against the conveyor can readily deactivate the conveyor drive motor; or
(b) Railings which—
(1) Are positioned to prevent persons
from falling on or against the conveyor;
(2) Will be able to withstand the vibration, shock, and wear to which they
will be subjected during normal operation; and
(3) Are constructed and maintained
so that they will not create a hazard.
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§ 57.14110 Flying or falling materials.
In areas where flying or falling materials generated from the operation of
screens, crushers, or conveyors present
a hazard, guards, shields, or other devices that provide protection against
such flying or falling materials shall be
provided to protect persons.
§ 57.14111 Slusher, backlash guards
and securing.
(a) When persons are exposed to
slushing operations, the slushers shall
be equipped with rollers and drum cov-
§ 57.14112 Construction and maintenance of guards.
(a) Guards shall be constructed and
maintained to—
(1) Withstand the vibration, shock,
and wear to which they will be subjected during normal operation; and
(2) Not create a hazard by their use.
(b) Guards shall be securely in place
while machinery is being operated, except when testing or making adjustments which cannot be performed without removal of the guard.
§ 57.14113 Inclined conveyors: backstops or brakes.
Backstops or brakes shall be installed on drive units of inclined conveyors to prevent the conveyors from
running in reverse, creating a hazard
to persons.
§ 57.14114 Air valves for pneumatic
equipment.
A manual master quick-close type air
valve shall be installed on all pneumatic-powered equipment if there is a
hazard of uncontrolled movement when
the air supply is activated. The valve
shall be closed except when the equipment is being operated.
[53 FR 32528, Aug. 25, 1988; 53 FR 44588, Nov.
4, 1988]
§ 57.14115 Stationary
grinding
machines.
Stationary grinding machines, other
than special bit grinders, shall be
equipped with—
(a) Peripheral hoods capable of withstanding the force of a bursting wheel
and enclosing not less than 270°—of the
periphery of the wheel;
(b) Adjustable tool rests set so that
the distance between the grinding surface of the wheel and the tool rest is
not greater than 1⁄8 inch; and
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§ 57.14116
30 CFR Ch. I (7–1–19 Edition)
(c) A safety washer on each side of
the wheel.
[53 FR 32528, Aug. 25, 1988; 53 FR 44588, Nov.
4, 1988]
§ 57.14116
Hand-held power tools.
(a) Power drills, disc sanders, grinders and circular and chain saws, when
used in the hand-held mode shall be operated with controls which require constant hand or finger pressure.
(b) Circular saws and chain saws
shall not be equipped with devices
which lock-on the operating controls.
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§ 57.14130 Roll-over protective structures (ROPS) and seat belts for surface equipment.
(a) Equipment included. Roll-over protective structures (ROPS) and seat
belts shall be installed on—
(1) Crawler tractors and crawler loaders;
(2) Graders;
(3) Wheel loaders and wheel tractors;
(4) The tractor portion of semimounted scrapers, dumpers, water wagons, bottom-dump wagons, rear-dump
wagons, and towed fifth wheel attachments;
(5) Skid-steer loaders; and
(6) Agricultural tractors.
(b) ROPS construction. ROPS shall
meet the requirements of the following
Society of Automotive Engineers
(SAE) publications, as applicable,
which are incorporated by reference:
(1) SAE J1040, ‘‘Performance Criteria
for Roll-Over Protective Structures
(ROPS) for Construction, Earthmoving,
Forestry, and Mining Machines,’’, 1986;
or
(2) SAE J1194, ‘‘Roll-Over Protective
Structures (ROPS) for Wheeled Agricultural Tractors’’, 1983.
(c) ROPS labeling. ROPS shall have a
label permanently affixed to the structure identifying—
(1) The manufacturer’s name and address;
(2) The ROPS model number; and
(3) The make and model number of
the equipment for which the ROPS is
designed.
(d) ROPS installation. ROPS shall be
installed on the equipment in accordance with the recommendations of the
ROPS manufacturer.
(e) ROPS maintenance. (1) ROPS shall
be maintained in a condition that
meets the performance requirements
applicable to the equipment. If the
ROPS is subjected to a roll-over or abnormal structural loading, the equipment manufacturer or a registered professional engineer with knowledge and
experience in ROPS design shall recertify that the ROPS meets the applicable performance requirements before it
is returned to service.
(2) Alterations or repairs on ROPS
shall be performed only with approval
from the ROPS manufacturer or under
the instructions of a registered professional engineer with knowledge and experience in ROPS design. The manufacturer or engineer shall certify that the
ROPS meets the applicable performance requirements.
(f) Exemptions. (1) This standard does
not apply to—
(i) Self-propelled mobile equipment
manufactured prior to July 1, 1969;
(ii) Over-the-road type tractors that
pull trailers or vans on highways;
(iii) Equipment that is only operated
by remote control; and
(2) Self-propelled mobile equipment
manufactured prior to October 24, 1988,
that is equipped with ROPS and seat
belts that meet the installation and
performance requirements of 30 CFR
57.9088 (1986 edition) shall be considered
in compliance with paragraphs (b) and
(h) of this section.
(g) Wearing seat belts. Seat belts shall
be worn by the equipment operator except that when operating graders from
a standing position, the grader operator shall wear safety lines and a harness in place of a seat belt.
(h) Seat belts construction. Seat belts
required under this section shall meet
the requirement of SAE J386, ‘‘Operator Restraint System for Off-Road
Work Machines’’ (1985, 1993, or 1997), or
SAE J1194, ‘‘Roll-Over Protective
Structures (ROPS) for Wheeled Agricultural Tractors’’ (1983, 1989, 1994, or
1999), as applicable, which are incorporated by reference.
(i) Seat belt maintenance. Seat belts
shall be maintained in functional condition, and replaced when necessary to
assure proper performance.
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Mine Safety and Health Admin., Labor
§ 57.14162
(j) Publications. The incorporation by
reference of these publications is approved by the Director of the Federal
Register in accordance with 5 U.S.C.
552(a) and 1 CFR part 51. Copies of
these publications may be examined at
any Metal and Nonmetal Mine Safety
and Health District Office; at MSHA’s
Office of Standards, Regulations, and
Variances, 201 12th Street South, Arlington, VA 22202–5452; 202–693–9440; or
at the National Archives and Records
Administration (NARA). For information on the availability of this material at NARA, call 202–741–6030, or go
to:
http://www.archives.gov/
federallregister/
codeloflfederallregulations/
ibrllocations.html. Copies may be purchased from the Society of Automotive
Engineers, 400 Commonwealth Drive,
Warrendale, PA 15096–0001; 724–776–4841;
http://www.sae.org.
ibrllocations.html. Copies may be purchased from the Society of Automotive
Engineers, 400 Commonwealth Drive,
Warrendale, PA 15096–0001; 724–776–4841;
http://www.sae.org.
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[53 FR 32528, Aug. 25, 1988; 53 FR 44588, Nov.
4, 1988, as amended at 60 FR 33722, June 29,
1995; 67 FR 38385, June 4, 2002; 68 FR 19347,
Apr. 21, 2003; 80 FR 52988, Sept. 2, 2015]
§ 57.14131 Seat belts for surface haulage trucks.
(a) Seat belts shall be provided and
worn in haulage trucks.
(b) Seat belts shall be maintained in
functional condition, and replaced
when necessary to assure proper performance.
(c) Seat belts required under this section shall meet the requirements of
SAE J386, ‘‘Operator Restraint System
for Off-Road Work Machines’’ (1985,
1993, or 1997), which are incorporated by
reference.
(d) The incorporation by reference of
these publications is approved by the
Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR
part 51. Copies of these publications
may be examined at any Metal and
Nonmetal Mine Safety and Health District Office; at MSHA’s Office of Standards, Regulations, and Variances, 201
12th Street South, Arlington, VA 22202–
5452; 202–693–9440; or at the National Archives and Records Administration
(NARA). For information on the availability of this material at NARA, call
202–741–6030,
or
go
to:
http://
www.archives.gov/federallregister/
codeloflfederallregulations/
[53 FR 32528, Aug. 25, 1988, as amended at 67
FR 38385, June 4, 2002; 68 FR 19347, Apr. 21,
2003; 80 FR 52988, Sept. 2, 2015]
§ 57.14132 Horns and backup alarms
for surface equipment.
(a) Manually-operated horns or other
audible warning devices provided on
self-propelled mobile equipment as a
safety device shall be maintained in a
functional condition.
(b)(1) When the operator has an obstructed view to the rear, self-propelled
mobile equipment shall have—
(i) An automatic reverse-activated
signal alarm;
(ii) A wheel-mounted bell alarm
which sounds at least once for each
three feet of reverse movement;
(iii) A discriminating backup alarm
that covers the area of obstructed
view; or
(iv) An observer to signal when it is
safe to back up.
(2) Alarms shall be audible above the
surrounding noise level.
(3) An automatic reverse-activated
strobe light may be used at night in
lieu of an audible reverse alarm.
(c) This standard does not apply to
rail equipment.
§ 57.14160 Mantrip trolley wire hazards underground.
Mantrips shall be covered if there is
danger of persons contacting the trolley wire.
§ 57.14161
Makeshift couplings.
Couplings used on underground rail
equipment shall be designed for that
equipment, except that makeshift couplings may be used to move disabled
rail equipment for repairs if no hazard
to persons is created.
§ 57.14162
Trip lights.
On underground rail haulage, trip
lights shall be used on the rear of
pulled trips and on the front of pushed
trips.
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§ 57.14200
30 CFR Ch. I (7–1–19 Edition)
SAFETY PRACTICES AND OPERATIONAL
PROCEDURES
§ 57.14200 Warnings prior to starting
or moving equipment.
Before starting crushers or moving
self-propelled mobile equipment, equipment operators shall sound a warning
that is audible above the surrounding
noise level or use other effective means
to warn all persons who could be exposed to a hazard from the equipment.
§ 57.14201
Conveyor start-up warnings.
(a) When the entire length of a conveyor is visible from the starting
switch, the conveyor operator shall visually check to make certain that all
persons are in the clear before starting
the conveyor.
(b) When the entire length of the conveyor is not visible from the starting
switch, a system which provides visible
or audible warning shall be installed
and operated to warn persons that the
conveyor will be started. Within 30 seconds after the warning is given, the
conveyor shall be started or a second
warning shall be given.
§ 57.14202 Manual
veyor pulleys.
cleaning
of
con-
Pulleys of conveyors shall not be
cleaned manually while the conveyor is
in motion.
§ 57.14203
Application of belt dressing.
Belt dressings shall not be applied
manually while belts are in motion unless a pressurized-type applicator is
used that allows the dressing to be applied from outside the guards.
§ 57.14204
Machinery lubrication.
Machinery or equipment shall not be
lubricated manually while it is in motion where application of the lubricant
may expose persons to injury.
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§ 57.14205
tools.
Machinery, equipment, and
Machinery, equipment, and tools
shall not be used beyond the design capacity intended by the manufacturer,
where such use may create a hazard to
persons.
§ 57.14206 Securing movable parts.
(a) When moving mobile equipment
between workplaces, booms, forks,
buckets, beds, and similar movable
parts of the equipment shall be positioned in the travel mode and, if required for safe travel, mechanically secured.
(b) When mobile equipment is unattended or not in use, dippers, buckets
and scraper blades shall be lowered to
the ground. Other movable parts, such
as booms, shall be mechanically secured or positioned to prevent movement which would create a hazard to
persons.
§ 57.14207 Parking procedures for unattended equipment.
Mobile equipment shall not be left
unattended unless the controls are
placed in the park position and the
parking brake, if provided, is set. When
parked on a grade, the wheels or tracks
of mobile equipment shall be either
chocked or turned into a bank or rib.
§ 57.14208 Warning devices.
(a) Visible warning devices shall be
used when parked mobile equipment
creates a hazard to persons in other
mobile equipment.
(b) Mobile equipment, other than
forklifts, carrying loads that project
beyond the sides or more than four feet
beyond the rear of the equipment shall
have a warning flag at the end of the
projection. Under conditions of limited
visibility these loads shall have a
warning light at the end of the projection. Such flags or lights shall be attached to the end of the projection or
be carried by persons walking beside or
behind the projection.
§ 57.14209 Safety procedures for towing.
(a) A properly sized tow bar or other
effective means of control shall be used
to tow mobile equipment.
(b) Unless steering and braking are
under the control of the equipment operator on the towed equipment, a safety chain or wire rope capable of withstanding the loads to which it could be
subjected shall be used in conjunction
with any primary rigging.
(c) This provision does not apply to
rail equipment.
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Mine Safety and Health Admin., Labor
§ 57.14219
§ 57.14210 Movement of dippers, buckets, loading booms, or suspended
loads.
(a) Dippers, buckets, loading booms,
or suspended loads shall not be swung
over the operators’ stations of self-propelled mobile equipment until the
equipment operator is out of the operator’s station and in a safe location.
(b) This section does not apply when
the equipment is specifically designed
to protect the equipment operator from
falling objects.
where arc flash could be hazardous to
persons.
(b) All welding operations shall be
well-ventilated.
§ 57.14211 Blocking equipment in a
raised position.
(a) Persons shall not work on top of,
under, or work from mobile equipment
in a raised position until the equipment has been blocked or mechanically
secured to prevent it from rolling or
falling accidentally.
(b) Persons shall not work on top of,
under, or work from a raised component of mobile equipment until the
component has been blocked or mechanically secured to prevent accidental lowering. The equipment must
also be blocked or secured to prevent
rolling.
(c) A raised component must be secured to prevent accidental lowering
when persons are working on or around
mobile equipment and are exposed to
the hazard of accidental lowering of
the component.
(d) Under this section, a raised component of mobile equipment is considered to be blocked or mechanically secured if provided with a functional
load-locking device or devices which
prevent free and uncontrolled descent.
(e) Blocking or mechanical securing
of the raised component is required
during repair or maintenance of elevated mobile work platforms.
kpayne on VMOFRWIN702 with $$_JOB
§ 57.14212 Chains, ropes, and drive
belts.
Chains, ropes, and drive belts shall be
guided mechanically onto moving pulleys, sprockets, or drums except where
equipment is designed specifically for
hand feeding.
§ 57.14213 Ventilation and shielding
for welding.
(a) Welding operations shall be
shielded when performed at locations
§ 57.14214
Train warnings.
A warning that is audible above the
surrounding noise level shall be sounded—
(a) Immediately prior to moving
trains;
(b) When trains approach persons,
crossing, other trains on adjacent
tracks; and
(c) Any place where the train operator’s vision is obscured.
§ 57.14215
cars.
Coupling
or
Prior to coupling or uncoupling cars
manually, trains shall be brought to a
complete stop, and then moved at minimum tram speed until the coupling or
uncoupling activity is completed. Coupling or uncoupling shall not be attempted from the inside of curves unless the railroad and cars are designed
to eliminate hazards to persons.
§ 57.14216
Backpoling.
Backpoling of trolleys is prohibited
except where there is inadequate clearance to reverse the trolley pole. Where
backpoling is required, it shall be done
only at the minimum tram speed of the
trolley.
§ 57.14217
Securing parked railcars.
Parked railcars shall be blocked securely unless held effectively by
brakes.
§ 57.14218 Movement of equipment on
adjacent tracks.
When a locomotive on one track is
used to move rail equipment on adjacent tracks, a chain, cable, or drawbar
shall be used which is capable of withstanding the loads to which it could be
subjected.
§ 57.14219
Brakeman signals.
When a train is under the direction of
a brakeman and the train operator cannot clearly recognize the brakeman’s
signals, the train operator shall bring
the train to a stop.
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Pt. 57, Subpt. M, App. I
30 CFR Ch. I (7–1–19 Edition)
APPENDIX I TO SUBPART M OF PART 57—
NATIONAL CONSENSUS STANDARDS
Mine operators seeking further information regarding the construction and installation of falling object protective structures
(FOPS) may consult the following national
consensus standards, as applicable.
National consensus standard
Front-end loaders
and bulldozers.
Fork-lift trucks ........
Society of Automotive Engineers (SAE)
minimum performance criteria for
falling object protective structures
(FOPS) SAE J231—January, 1981.
American National Standards Institute
(ANSI) safety standard for low lift
and high lift trucks, B 56.1, section
7.27—1983; or
American National Standards Institute
(ANSI) standard, rough terrain fork
lift trucks, B 56.6—1987.
SURFACE AND UNDERGROUND
First aid materials.
Adequate first-aid materials, including stretchers and blankets shall be
provided at places convenient to all
working areas. Water or neutralizing
agents shall be available where corrosive chemicals or other harmful substances are stored, handled, or used.
§ 57.15002
Hard hats.
All persons shall wear suitable hard
hats when in or around a mine or plant
where falling objects may create a hazard.
§ 57.15003
Protective footwear.
All persons shall wear suitable protective footwear when in or around an
area of a mine or plant where a hazard
exists which could cause an injury to
the feet.
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§ 57.15004
Special protective equipment and
special protective clothing shall be
provided, maintained in a sanitary and
reliable condition and used whenever
hazards of process or environment,
chemical hazards, radiological hazards,
or mechancial irritants are encountered in a manner capable of causing
injury or impairment.
§ 57.15007 Protective equipment or
clothing for welding, cutting, or
working with molten metal.
Protective clothing or equipment and
face shields or goggles shall be worn
when welding, cutting, or working with
molten metal.
Subpart N—Personal Protection
§ 57.15001
Safety belts and lines.
Safety belts and lines shall be worn
when persons work where there is danger of falling; a second person shall
tend the lifeline when bins, tanks, or
other dangerous areas are entered.
§ 57.15006 Protective equipment and
clothing for hazards and irritants.
MSHA STANDARD 57.14106, FALLING OBJECT
PROTECTION
Equipment
§ 57.15005
Eye protection.
All persons shall wear safety glasses,
goggles, or face shields or other suitable protective devices when in or
around an area of a mine or plant
where a hazard exists which could
cause injury to unprotected eyes.
§ 57.15014 Eye protection when operating grinding wheels.
Face shields or goggles in good condition shall be worn when operating a
grinding wheel.
[53 FR 32533, Aug. 25, 1988]
SURFACE ONLY
§ 57.15020 Life jackets and belts.
Life jackets or belts shall be worn
where there is danger from falling into
water.
UNDERGROUND ONLY
§ 57.15030 Provision and maintenance
of self-rescue devices.
A 1-hour self-rescue device approved
by MSHA and NIOSH under 42 CFR
part 84 shall be made available by the
operator to all personnel underground.
Each operator shall maintain self-rescue devices in good condition.
[60 FR 30401, June 8, 1995]
§ 57.15031 Location of self-rescue devices.
(a) Except as provided in paragraph
(b) and (c) of this section, self-rescue
devices meeting the requirements of
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Mine Safety and Health Admin., Labor
§ 57.16012
standard 57.15030 shall be worn or carried by all persons underground.
(b) Where the wearing or carrying of
self-rescue devices meeting the requirements of standard 57.15030 is hazardous
to a person, such self-rescue devices
shall be located at a distance no greater than 25 feet from such person.
(c) Where a person works on or
around mobile equipment, self-rescue
devices may be placed in a readily accessible location on such equipment.
§ 57.16003 Storage of hazardous materials.
Materials that can create hazards if
accidentally liberated from their containers shall be stored in a manner
that minimizes the dangers.
Subpart O—Materials Storage and
Handling
[67 FR 42389, June 21, 2002]
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§ 57.16001 Stacking and storage of materials.
Supplies shall not be stacked or
stored in a manner which creates tripping or fall-of-material hazards.
§ 57.16002 Bins, hoppers, silos, tanks,
and surge piles.
(a) Bins, hoppers, silos, tanks, and
surge piles, where loose unconsolidated
materials are stored, handled or transferred shall be—
(1) Equipped with mechanical devices
or other effective means of handling
materials so that during normal operations persons are not required to
enter or work where they are exposed
to entrapment by the caving or sliding
of materials; and
(2) Equipped with supply and discharge operating controls. The controls
shall be located so that spills or overruns will not endanger persons.
(b) Where persons are required to
move around or over any facility listed
in this standard, suitable walkways or
passageways shall be provided.
(c) Where persons are required to
enter any facility listed in this standard for maintenance or inspection purposes, ladders, platforms, or staging
shall be provided. No person shall enter
the facility until the supply and discharge of materials have ceased and
the supply and discharge equipment is
locked out. Persons entering the facility shall wear a safety belt or harness
equipped with a lifeline suitably fastened. A second person, similarly
equipped, shall be stationed near where
the lifeline is fastened and shall constantly adjust it or keep it tight as
needed, with minimum slack.
§ 57.16004 Containers for hazardous
materials.
Containers holding hazardous materials must be of a type approved for
such use by recognized agencies.
§ 57.16005 Securing gas cylinders.
Compressed and liquid gas cylinders
shall be secured in a safe manner.
§ 57.16006 Protection of gas cylinder
valves.
Valves on compressed gas cylinders
shall be protected by covers when being
transported or stored, and by a safe location when the cylinders are in use.
§ 57.16007 Taglines, hitches, and slings.
(a) Taglines shall be attached to
loads that may require steadying or
guidance while suspended.
(b) Hitches and slings used to hoist
materials shall be suitable for the particular material handled.
§ 57.16009 Suspended loads.
Persons shall stay clear of suspended
loads.
§ 57.16010 Dropping materials from
overhead.
To protect personnel, material shall
not be dropped from an overhead elevation until the drop area is first
cleared of personnel and the area is
then either guarded or a suitable warning is given.
§ 57.16011 Riding hoisted loads or on
the hoist hook.
Persons shall not ride on loads being
moved by cranes or derricks, nor shall
they ride the hoisting hooks unless
such method eliminates a greater hazard.
§ 57.16012 Storage of incompatible substances.
Chemical substances, including concentrated acids and alkalies, shall be
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§ 57.16013
30 CFR Ch. I (7–1–19 Edition)
stored to prevent inadvertent contact
with each other or with other substances, where such contact could
cause a violent reaction or the liberation of harmful fumes or gases.
§ 57.16013
Working with molten metal.
Suitable warning shall be given before molten metal is poured and before
a container of molten metal is moved.
§ 57.16014 Operator-carrying overhead
cranes.
Operator-carrying overhead cranes
shall be provided with—
(a) Bumpers at each end of each rail;
(b) Automatic switches to halt
uptravel of the blocks before they
strike the hoist;
(c) Effective audible warning signals
within easy reach of the operator; and
(d) A means to lock out the disconnect switch.
§ 57.16015 Work or travel on overhead
crane bridges.
No person shall work from or travel
on the bridge of an overhead crane unless the bridge is provided with substantial footwalks with toeboards and
railings the length of the bridge.
§ 57.16016
Lift trucks.
Fork and other similar types of lift
trucks shall be operated with the:
(a) Upright tilted back to steady and
secure the load;
(b) Load in the upgrade position
when ascending or descending grades in
excess of 10 percent;
(c) Load not raised or lowered
enroute except for minor adjustments;
and
(d) Load-engaging device downgrade
when traveling unloaded on all grades.
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§ 57.16017 Hoisting heavy equipment
or material.
Where the stretching or contraction
of a hoist rope could create a hazard,
chairs or other suitable blocking shall
be used to support conveyances at
shaft landings before heavy equipment
or material is loaded or unloaded.
Subpart P—Illumination
§ 57.17001 Illumination
working areas.
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Illumination sufficient to provide
safe working conditions shall be provided in and on all surface structures,
paths, walkways, stairways, switch
panels, loading and dumping sites, and
working areas.
§ 57.17010
Electric lamps.
Individual electric lamps shall be
carried for illumination by all persons
underground.
Subpart Q—Safety Programs
SURFACE AND UNDERGROUND
§ 57.18002 Examination
places.
of
working
(a) A competent person designated by
the operator shall examine each working place at least once each shift before
work begins or as miners begin work in
that place, for conditions that may adversely affect safety or health.
(1) The operator shall promptly notify miners in any affected areas of any
conditions found that may adversely
affect safety or health and promptly
initiate appropriate action to correct
such conditions.
(2) Conditions noted by the person
conducting the examination that may
present an imminent danger shall be
brought to the immediate attention of
the operator who shall withdraw all
persons from the area affected (except
persons referred to in section 104(c) of
the Federal Mine Safety and Health
Act of 1977) until the danger is abated.
(b) A record of each examination
shall be made before the end of the
shift for which the examination was
conducted. The record shall contain
the name of the person conducting the
examination; date of the examination;
location of all areas examined; and description of each condition found that
may adversely affect the safety or
health of miners and is not corrected
promptly.
(c) When a condition that may adversely affect safety or health is not
corrected promptly, the examination
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Mine Safety and Health Admin., Labor
record shall include, or be supplemented to include, the date of the corrective action.
(d) The operator shall maintain the
examination records for at least one
year, make the records available for inspection by authorized representatives
of the Secretary and the representatives of miners, and provide these representatives a copy on request.
§ 57.18028
SURFACE ONLY
§ 57.18020
UNDERGROUND ONLY
[83 FR 15065, April 9, 2018]
§ 57.18006
§ 57.18025
New employees.
New employees shall be indoctrinated
in safety rules and safe work procedures.
§ 57.18009 Designation
charge.
of
person
in
When persons are working at the
mine, a competent person designated
by the mine operator shall be in attendance to take charge in case of an
emergency.
§ 57.18010
First aid.
An individual capable of providing
first aid shall be available on all shifts.
The individual shall be currently
trained and have the skills to perform
patient assessment and artificial respiration; control bleeding; and treat
shock, wounds, burns, and musculoskeletal injuries. First aid training
shall be made available to all interested miners.
[61 FR 50436, Sept. 26, 1996]
§ 57.18012
bers.
Emergency telephone num-
Emergency telephone numbers shall
be posted at appropriate telephones.
§ 57.18013 Emergency communications
system.
A suitable communication system
shall be provided at the mine to obtain
assistance in the event of an emergency.
§ 57.18014 Emergency medical assistance and transportation.
kpayne on VMOFRWIN702 with $$_JOB
Working alone.
No employee shall be assigned, or allowed, or be required to perform work
alone in any area where hazardous conditions exist that would endanger his
safety unless he can communicate with
others, can be heard, or can be seen.
Arrangements shall be made in advance for obtaining emergency medical
assistance and transportation for injured persons.
Working alone.
No employee shall be assigned, or allowed, or be required to perform work
alone in any area where hazardous conditions exist that would endanger his
safety unless his cries for help can be
heard or he can be seen.
§ 57.18028 Mine emergency and selfrescuer training.
(a) On an annual basis, all persons
who are required to go underground
shall be instructed in the Mine Safety
and Health Administration approved
course contained in Bureau of Mines
Instruction Guide 19, ‘‘Mine Emergency
Training’’ (September 1972). The instruction shall be given by MSHA personnel or by persons who are certified
by the District Manager of the area in
which the mine is located.
(b) On an annual basis, all persons
who go underground shall be instructed
in the Mine Safety and Health Administration course contained in Bureau of
Mines Instruction Guide 2, ‘‘MSA W–65
Self-Rescuer’’ (March 1972) or Bureau
of Mines Instruction Guide 3, ‘‘Permissible Drager 810 Respirator for SelfRescue’’ (March 1972). The instruction
shall be given by MSHA personnel or
by persons who are certified by the District Manager of the area in which the
mine is located: Provided, however,
That if a Mine Safety and Health Administration instructor or a certified
instructor is not immediately available
such instruction of new employees in
self-rescuers may be conducted by
qualified company personnel who are
not certified, but who have obtained
provisional approval from the District
Manager. Any person who has not had
self-rescuer instruction within 12
months immediately preceding going
underground shall be instructed in the
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§ 57.19000
30 CFR Ch. I (7–1–19 Edition)
use of self-rescuers before going underground.
(c) All instructional material, handouts, visual aids, and other such teaching accessories used by the operator in
the courses prescribed in paragraphs
(a) and (b) of this section shall be
available for inspection by the Secretary or his authorized representative.
(d) Records of all instruction shall be
kept at the mine site or nearest mine
office at least 2 years from the date of
instruction. Upon completion of such
instruction, copies of the record shall
be submitted to the District Manager.
(e) The Bureau of Mines instruction
guides to which reference is made in
items (a) and (b) of this standard are
hereby incorporated by reference and
made a part hereof. The incorporated
instruction guides are available and
shall be provided upon request made to
any Metal and Nonmetal Mine Safety
and Health district office.
[50 FR 4082, Jan. 29, 1985, as amended at 71
FR 16667, Apr. 3, 2006]
Subpart R—Personnel Hoisting
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§ 57.19000
Application.
(a) The hoisting standards in this
subpart apply to those hoists and appurtenances used for hoisting persons.
However, where persons may be endangered by hoists and appurtenances used
solely for handling ore, rock, and materials, the appropriate standards should
be applied.
(b) Standards 57.19021 through 57.19028
shall apply to wire ropes in service
used to hoist—
(1) Persons in shafts and slopes underground;
(2) Persons with an incline hoist on
the surface; or
(3) Loads in shaft or slope development when persons work below suspended loads.
(4) These standards do not apply to
wire ropes used for elevators.
(c) Emergency hoisting facilities
should conform to the extent possible
to safety requirements for other hoists,
and should be adequate to remove the
persons from the mine with a minimum
of delay.
HOISTS
§ 57.19001
Rated capacities.
Hoists shall have rated capacities
consistent with the loads handled and
the recommended safety factors of the
ropes used.
§ 57.19002
Anchoring.
Hoists shall be anchored securely.
§ 57.19003
tions.
Driving mechanism connec-
Belt, rope, or chains shall not be used
to connect driving mechanisms to man
hoists.
§ 57.19004
Brakes.
Any hoist used to hoist persons shall
be equipped with a brake or brakes
which shall be capable of holding its
fully loaded cage, skip, or bucket at
any point in the shaft.
§ 57.19005 Locking
clutch.
mechanism
The operating mechanism of the
clutch of every man-hoist drum shall
be provided with a locking mechanism,
or interlocked electrically or mechanically with the brake to prevent accidental withdrawal of the clutch.
§ 57.19006
vices.
Automatic hoist braking de-
Automatic hoists shall be provided
with devices that automatically apply
the brakes in the event of power failure.
§ 57.19007 Overtravel
devices.
and
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All man hoists shall be provided with
devices to prevent overtravel. When
utilized in shafts exceeding 100 feet in
depth, such hoists shall also be provided with overspeed devices.
§ 57.19008 Friction hoist synchronizing
mechanisms.
Where creep or slip may alter the effective position of safety devices, friction hoists shall be equipped with synchronizing mechanisms that recalibrate the overtravel devices and position indicators.
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Mine Safety and Health Admin., Labor
§ 57.19009
Position indicator.
An accurate and reliable indicator of
the position of the cage, skip, bucket,
or cars in the shaft shall be provided.
§ 57.19010
Location of hoist controls.
Hoist controls shall be placed or
housed so that the noise from machinery or other sources will not prevent
hoistmen from hearing signals.
§ 57.19011
Drum flanges.
Flanges on drums shall extend radially a minimum of 4 inches or three
rope diameters beyond the last wrap,
whichever is the lesser.
§ 57.19012
Grooved drums.
Where grooved drums are used, the
grooves shall be of suitable size and
pitch for the ropes used.
§ 57.19013 Diesel- and other fuel-injection-powered hoists.
Where any diesel or similar fuel-injection engine is used to power a hoist,
the engine shall be equipped with a
damper or other cutoff in its air intake
system. The control handle shall be
clearly labeled to indicate that its intended function is for emergency stopping only.
§ 57.19014 Friction hoist overtravel
protection.
In a friction hoist installation, tapered guides or other approved devices
shall be installed above and below the
limits of regular travel of the conveyance and arranged to prevent overtravel in the event of failure of other
devices.
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§ 57.19017 Emergency braking for electric hoists.
Each electric hoist shall be equipped
with a manually-operable switch that
will initiate emergency braking action
to bring the conveyance and the counterbalance safely to rest. This switch
shall be located within reach of the
hoistman in case the manual controls
of the hoist fail.
§ 57.19018 Overtravel by-pass switches.
When an overtravel by-pass switch is
installed, the switch shall function so
as to allow the conveyance to be moved
§ 57.19022
through the overtravel position when
the switch is held in the closed position
by the hoistman. The overtravel bypass switch shall return automatically
to the open position when released by
the hoistman.
WIRE ROPES
AUTHORITY: Sec. 101, Federal Mine Safety
and Health Act of 1977, Pub. L. 91–173 as
amended by Pub. L. 95–164, 91 Stat. 1291 (30
U.S.C. 811).
§ 57.19019 Guide ropes.
If guide ropes are used in shafts for
personnel hoisting applications other
than shaft development, the nominal
strength (manufacturer’s published
catalog strength) of the guide rope at
installation shall meet the minimum
value calculated as follows: Minimum
value = Static Load × 5.0.
§ 57.19021 Minimum rope strength.
At installation, the nominal strength
(manufacturer’s
published
catalog
strength) of wire ropes used for hoisting shall meet the minimum rope
strength values obtained by the following formulas in which ‘‘L’’ equals
the maximum suspended rope length in
feet:
(a) Winding drum ropes (all constructions, including rotation resistant).
For rope lengths less than 3,000 feet: Minimum Value = Static Load × (7.0 ¥ 0.001L)
For rope lengths 3,000 feet or greater: Minimum Value = Static Load × 4.0.
(b) Friction drum ropes.
For rope lengths less than 4,000 feet: Minimum Value = Static Load × (7.0 ¥ 0.0005L)
For rope lengths 4,000 feet or greater: Minimum Value = Static Load × 5.0.
(c) Tail ropes (balance ropes).
Minimum Value = Weight of Rope × 7.0
§ 57.19022 Initial measurement.
After initial rope stretch but before
visible wear occurs, the rope diameter
of newly installed wire ropes shall be
measured at least once in every third
interval of active length and the measurements averaged to establish a baseline for subsequent measurements. A
record of the measurements and the
date shall be made by the person taking the measurements. This record
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§ 57.19023
30 CFR Ch. I (7–1–19 Edition)
shall be retained until the rope is retired from service.
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[50 FR 4082, Jan. 29, 1985, as amended at 60
FR 33722, June 29, 1995]
§ 57.19023 Examinations.
(a) At least once every fourteen calendar days, each wire rope in service
shall be visually examined along its entire active length for visible structural
damage, corrosion, and improper lubrication or dressing. In addition, visual
examination for wear and broken wires
shall be made at stress points, including the area near attachments, where
the rope rests on sheaves, where the
rope leaves the drum, at drum crossovers, and at change-of-layer regions.
When any visible condition that results
in a reduction of rope strength is
present, the affected portion of the
rope shall be examined on a daily basis.
(b) Before any person is hoisted with
a newly installed wire rope or any wire
rope that has not been examined in the
previous fourteen calendar days, the
wire rope shall be examined in accordance with paragraph (a) of this section.
(c) At least once every six months,
nondestructive tests shall be conducted
of the active length of the rope, or rope
diameter
measurements
shall
be
made—
(1) Wherever wear is evident;
(2) Where the hoist rope rests on
sheaves at regular stopping points;
(3) Where the hoist rope leaves the
drum at regular stopping points; and
(4) At drum crossover and change-oflayer regions.
(d) At the completion of each examination required by paragraph (a) of
this section, the person making the examination shall certify, by signature
and date, that the examination has
been made. If any condition listed in
paragraph (a) of this section is present,
the person conducting the examination
shall make a record of the condition
and the date. Certifications and records
of examinations shall be retained for
one year.
(e) The person making the measurements or nondestructive tests as required by paragraph (c) of this section
shall record the measurements or test
results and the date. This record shall
be retained until the rope is retired
from service.
§ 57.19024 Retirement criteria.
Unless damage or deterioration is removed by cutoff, wire ropes shall be removed from service when any of the
following conditions occurs:
(a) The number of broken wires within a rope lay length, excluding filler
wires, exceeds either—
(1) Five percent of the total number
of wires; or
(2) Fifteen percent of the total number of wires within any strand.
(b) On a regular lay rope, more than
one broken wire in the valley between
strands in one rope lay length.
(c) A loss of more than one-third of
the original diameter of the outer
wires.
(d) Rope deterioration from corrosion.
(e) Distortion of the rope structure.
(f) Heat damage from any source.
(g) Diameter reduction due to wear
that exceeds six percent of the baseline
diameter measurement.
(h) Loss of more than ten percent of
rope strength as determined by nondestructive testing.
§ 57.19025 Load end attachments.
(a) Wire rope shall be attached to the
load by a method that develops at least
80 percent of the nominal strength of
the rope.
(b) Except for terminations where use
of other materials is a design feature,
zinc (spelter) shall be used for
socketing wire ropes. Design feature
means either the manufacturer’s original design or a design approved by a
registered professional engineer
(c) Load end attachment methods
using splices are prohibited.
§ 57.19026 Drum end attachment.
(a) For drum end attachment, wire
rope shall be attached—
(1) Securely by clips after making
one full turn around the drum spoke;
(2) Securely by clips after making
one full turn around the shaft, if the
drum is fixed to the shaft; or
(3) By properly assembled anchor
bolts, clamps, or wedges, provided that
the attachment is a design feature of
the hoist drum. Design feature means
either the manufacturer’s original design or a design approved by a registered professional engineer.
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(b) A minimum of three full turns of
wire rope shall be on the drum when
the rope is extended to its maximum
working length.
§ 57.19027 End
nation.
attachment
retermi-
Damaged or deteriorated wire rope
shall be removed by cutoff and the rope
reterminated where there is—
(a) More than one broken wire at an
attachment;
(b) Improper installation of an attachment;
(c) Slippage at an attachment; or
(d) Evidence of deterioration from
corrosion at an attachment.
§ 57.19028
ment.
End
attachment
replace-
Wire rope attachments shall be replaced when cracked, deformed, or excessively worn.
§ 57.19030
Safety device attachments.
Safety device attachments to hoist
ropes shall be selected, installed, and
maintained according to manufacturers’ specifications to minimize internal
corrosion and weakening of the hoist
rope.
HEADFRAMES AND SHEAVES
§ 57.19035
Headframe design.
All headframes shall be constructed
with suitable design considerations to
allow for all dead loads, live loads, and
wind loads.
§ 57.19036
Fleet angles.
Fleet angles on hoists installed after
November 15, 1979, shall not be greater
than one and one-half degrees for
smooth drums or two degrees for
grooved drums.
§ 57.19038 Platforms around elevated
head sheaves.
kpayne on VMOFRWIN702 with $$_JOB
CONVEYANCES
§ 57.19045
Platforms with toeboards and handrails shall be provided around elevated
head sheaves.
Metal bonnets.
Man cages and skips used for hoisting
or lowering employees or other persons
in any vertical shaft or any incline
shaft with an angle of inclination of
forty-five degrees from the horizontal,
shall be covered with a metal bonnet.
§ 57.19049
Hoisting persons in buckets.
Buckets shall not be used to hoist
persons except during shaft sinking operations, inspection, maintenance, and
repairs.
§ 57.19050
Bucket requirements.
Buckets used to hoist persons during
vertical
shaft
sinking
operations
shall—
(a) Be securely attached to a crosshead when traveling in either direction
between the lower and upper crosshead
parking locations;
(b) Have overhead protection when
the shaft depth exceeds 50 feet;
(c) Have sufficient depth or a suitably designed platform to transport
persons safely in a standing position;
and
(d) Have devices to prevent accidental dumping where the bucket is
supported by a bail attached to its
lower half.
§ 57.19054
Rope guides.
Where rope guides are used in shafts
other than in shaft sinking operations,
the rope guides shall be a type of lock
coil construction.
Headframe height.
Headframes shall be high enough to
provide clearance for overtravel and
safe stopping of the conveyance.
§ 57.19037
§ 57.19056
HOISTING PROCEDURES
§ 57.19055 Availability of hoist operator for manual hoists.
When a manually operated hoist is
used, a qualified hoistman shall remain
within hearing of the telephone or signal device at all times while any person is underground.
§ 57.19056 Availability of hoist operator for automatic hoists.
When automatic hoisting is used, a
competent operator of the hoist shall
be readily available at or near the
hoisting device while any person is underground.
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§ 57.19057
§ 57.19057
ness.
30 CFR Ch. I (7–1–19 Edition)
Hoist operator’s physical fit-
No person shall operate a hoist unless within the preceding 12 months he
has had a medical examination by a
qualified, licensed physician who shall
certify his fitness to perform this duty.
Such certification shall be available at
the mine.
Trips during shift changes.
During shift changes, an authorized
person shall be in charge of each trip in
which persons are hoisted.
§ 57.19068 Orderly conduct in conveyances.
Persons shall enter, ride, and leave
conveyances in an orderly manner.
opera-
§ 57.19069 Entering and leaving conveyances.
Only experienced hoistmen shall operate the hoist except in cases of emergency and in the training of new
hoistmen.
Persons shall not enter or leave conveyances which are in motion or after
a signal to move the conveyance has
been given to the hoistman.
§ 57.19058
tors.
§ 57.19061
Experienced
hoist
§ 57.19070
Maximum hoisting speeds.
The safe speed for hoisting persons
shall be determined for each shaft, and
this speed shall not be exceeded. Persons shall not be hoisted at a speed
faster than 2,500 feet per minute, except in an emergency.
§ 57.19062 Maximum acceleration and
deceleration.
Maximum normal operating acceleration and deceleration shall not exceed 6
feet per second per second. During
emergency braking, the deceleration
shall not exceed 16 feet per second per
second.
§ 57.19063 Persons
room.
allowed
in
hoist
Only authorized persons shall be in
hoist rooms.
§ 57.19065 Lowering
the brakes.
conveyances
by
Conveyances shall not be lowered by
the brakes alone except during emergencies.
§ 57.19066 Maximum riders in a conveyance.
kpayne on VMOFRWIN702 with $$_JOB
§ 57.19067
In shafts inclined over 45 degrees, the
operator shall determine and post in
the conveyance or at each shaft station
the maximum number of persons permitted to ride in a hoisting conveyance
at any one time. Each person shall be
provided a minimum of 1.5 square feet
of floor space.
Closing cage doors or gates.
Cage doors or gates shall be closed
while persons are being hoisted; they
shall not be opened until the cage has
come to a stop.
§ 57.19071
Riding in skips or buckets.
Persons shall not ride in skips or
buckets with muck, supplies, materials, or tools other than small hand
tools.
§ 57.19072 Skips and cages in same
compartment.
When combinations of cages and
skips are used in the same compartment, the cages shall be enclosed to
protect personnel from flying material
and the hoist speed reduced to manspeed as defined in standard 57.19061,
but not to exceed 1,000 feet per minute.
Muck shall not be hoisted with personnel during shift changes.
§ 57.19073 Hoisting
changes.
during
Rock or supplies shall not be hoisted
in the same shaft as persons during
shift changes, unless the compartments
and dumping bins are partitioned to
prevent spillage into the cage compartment.
§ 57.19074 Riding the bail, rim, bonnet,
or crosshead.
Persons shall not ride the bail, rim,
bonnet, or crosshead of any shaft conveyance except when necessary for inspection and maintenance, and then
only when suitable protection for persons is provided.
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§ 57.19075
Use of open hooks.
§ 57.19083
Open hooks shall not be used to hoist
buckets or other conveyances.
§ 57.19076 Maximum speeds for hoisting persons in buckets.
When persons are hoisted in buckets,
speeds shall not exceed 500 feet per
minute and shall not exceed 200 feet
per minute when within 100 feet of the
intended station.
§ 57.19077
Lowering buckets.
Buckets shall be stopped about 15
feet from the shaft bottom to await a
signal from one of the crew on the bottom for further lowering.
§ 57.19078 Hoisting buckets from the
shaft bottom.
All buckets shall be stopped after
being raised about three feet above the
shaft bottom. A bucket shall be stabilized before a hoisting signal is given
to continue hoisting the bucket to the
crosshead. After a hoisting signal is
given, hoisting to the crosshead shall
be at a minimum speed. The signaling
device shall be attended constantly
until a bucket reaches the guides.
When persons are hoisted, the signaling
devices shall be attended until the
crosshead has been engaged.
§ 57.19079
Blocking mine cars.
Where mine cars are hoisted by cage
or skip, means for blocking cars shall
be provided at all landings and also on
the cage.
§ 57.19080 Hoisting tools, timbers, and
other materials.
When tools, timbers, or other materials are being lowered or raised in a
shaft by means of a bucket, skip, or
cage, they shall be secured or so placed
that they will not strike the sides of
the shaft.
kpayne on VMOFRWIN702 with $$_JOB
§ 57.19081
§ 57.19095
Conveyances not in use.
When conveyances controlled by a
hoist operator are not in use, they
shall be released and the conveyances
shall be raised or lowered a suitable
distance to prevent persons from
boarding or loading the conveyances.
Overtravel backout device.
A manually operated device shall be
installed on each electric hoist that
will allow the conveyance or counterbalance to be removed from an overtravel position. Such device shall not
release the brake, or brakes, holding
the overtravelled conveyance or counterbalance until sufficient drive motor
torque has been developed to assure
movement of the conveyance or counterbalance in the correct direction
only.
SIGNALING
§ 57.19090
Dual signaling systems.
There shall be at least two effective
approved methods of signaling between
each of the shaft stations and the hoist
room, one of which shall be a telephone
or speaking tube.
§ 57.19091 Signaling
hoist operator.
instructions
Hoist operators shall accept hoisting
instructions only by the regular signaling system unless it is out of order.
In such an event, and during other
emergencies, the hoist operator shall
accept instructions to direct movement
of the conveyances only from authorized persons.
§ 57.19092
Signaling from conveyances.
A method shall be provided to signal
the hoist operator from cages or other
conveyances at any point in the shaft.
§ 57.19093
Standard signal code.
A standard code of hoisting signals
shall be adopted and used at each mine.
The movement of a shaft conveyance
on a ‘‘one bell’’ signal is prohibited.
§ 57.19094
Posting signal code.
A legible signal code shall be posted
prominently in the hoist house within
easy view of the hoistmen, and at each
place where signals are given or received.
§ 57.19095
Location of signal devices.
Hoisting signal devices shall be positioned within easy reach of persons on
the shaft bottom or constantly attended by a person stationed on the
lower deck of the sinking platform.
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§ 57.19096
30 CFR Ch. I (7–1–19 Edition)
§ 57.19096 Familiarity
with
signal
code.
Any person reponsible for receiving
or giving signals for cages, skips, and
mantrips when persons or materials
are being transported shall be familiar
with the posted signaling code.
SHAFTS
When persons are working in a shaft
‘‘Men Working in Shaft’’ signs shall be
posted at all devices controlling hoisting operations that may endanger such
persons.
§ 57.19109
§ 57.19100 Shaft landing gates.
Shaft landings shall be equipped with
substantial safety gates so constructed
that materials will not go through or
under them; gates shall be closed except when loading or unloading shaft
conveyances.
§ 57.19101 Stopblocks
and
derail
switches.
Positive stopblocks or a derail switch
shall be installed on all tracks leading
to a shaft collar or landing.
§ 57.19102 Shaft guides.
A means shall be provided to guide
the movement of a shaft conveyance.
§ 57.19103 Dumping facilities and loading pockets.
Dumping facilities and loading pockets shall be constructed so as to minimize spillage into the shaft.
§ 57.19104 Clearance at shaft stations.
Suitable clearance at shaft stations
shall be provided to allow safe movement of persons, equipment and materials.
§ 57.19105 Landings with more than
one shaft entrance.
A safe means of passage around open
shaft compartments shall be provided
on landings with more than one entrance to the shaft.
§ 57.19106 Shaft sets.
Shaft sets shall be kept in good repair and clean of hazardous material.
kpayne on VMOFRWIN702 with $$_JOB
§ 57.19108 Posting warning signs during shaft work.
§ 57.19107 Precautions for work in
compartment affected by hoisting
operation.
Hoistmen shall be informed when
persons are working in a compartment
affected by that hoisting operation and
a ‘‘Men Working in Shaft’’ sign shall be
posted at the hoist.
Shaft inspection and repair.
Shaft inspection and repair work in
vertical shafts shall be performed from
substantial platforms equipped with
bonnets or equivalent overhead protection.
§ 57.19110 Overhead
protection
shaft deepening work.
A substantial bulkhead or equivalent
protection shall be provided above persons at work deepening a shaft.
§ 57.19111
Shaft-sinking ladders.
Substantial fixed ladders shall be
provided from the collar to as near the
shaft bottom as practical during shaftsinking operations, or an escape hoist
powered by an emergency power source
shall be provided. When persons are on
the shaft bottom, a chain ladder, wire
rope ladder, or other extension ladders
shall be used from the fixed ladder or
lower limit of the escape hoist to the
shaft bottom.
INSPECTION AND MAINTENANCE
§ 57.19120 Procedures for inspection,
testing, and maintenance.
A systematic procedure of inspection,
testing and maintenance of shaft and
hoisting equipment shall be developed
and followed. If it is found or suspected
that any part is not functioning properly, the hoist shall not be used until
the malfunction has been located and
repaired or adjustments have been
made.
§ 57.19121
Recordkeeping.
At the time of completion, the person
performing inspections, tests, and
maintenance of shafts and hoisting
equipment required in standard 57.19120
shall certify, by signature and date,
that they have been done. A record of
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Mine Safety and Health Admin., Labor
§ 57.20002
any part that is not functioning properly shall be made and dated. Certifications and records shall be retained
for one year.
(b) After installation and before use,
and at the beginning of any seven day
period during which the conveyance is
to be used, the conveyance shall be
suitably rested and the hoist rope
slackened to test for the unrestricted
functioning of the safety catches and
their activating mechanisms.
(c) The safety catches shall be inspected by a competent person at the
beginning of any 24-hour period that
the conveyance is to be used.
(Sec. 101, Pub. L. 91–173 as amended by Pub.
L. 95–164, 91 Stat. 1291 (30 U.S.C. 811))
[50 FR 4082, Jan. 29, 1985, as amended at 60
FR 33722, June 29, 1995]
§ 57.19122
Replacement parts.
Parts used to repair hoists shall have
properties that will ensure the proper
and safe function of the hoist.
§ 57.19129 Examinations and tests at
beginning of shift.
Hoistmen shall examine their hoists
and shall test overtravel, deadman controls, position indicators, and braking
mechanisms at the beginning of each
shift.
§ 57.19130
Conveyance shaft test.
Before hoisting persons and to assure
that the hoisting compartments are
clear of obstructions, empty hoist conveyances shall be operated at least one
round trip after—
(a) Any hoist or shaft repairs or related equipment repairs that might restrict or obstruct conveyance clearance;
(b) Any oversize or overweight material or equipment trips that might restrict or obstruct conveyance clearance;
(c) Blasting in or near the shaft that
might restrict or obstruct conveyance
clearance; or
(d) Remaining idle for one shift or
longer.
kpayne on VMOFRWIN702 with $$_JOB
§ 57.19131 Hoist conveyance connections.
Hoist conveyance connections shall
be inspected at least once during any
24-hour period that the conveyance is
used for hoisting persons.
§ 57.19132 Safety catches.
(a) A performance drop test of hoist
conveyance safety catches shall be
made at the time of installation, or
prior to installation in a mockup of the
actual installation. The test shall be
certified to in writing by the manufacturer or by a registered professional
engineer performing the test.
§ 57.19133
Shaft.
Shafts that have not been inspected
within the past 7 days shall not be used
until an inspection has been conducted
by a competent person.
§ 57.19134
Sheaves.
Sheaves in operating shafts shall be
inspected weekly and kept properly lubricated.
§ 57.19135
Rollers in inclined shafts.
Rollers used in operating inclined
shafts shall be lubricated, properly
aligned, and kept in good repair.
Subpart S—Miscellaneous
§ 57.20001 Intoxicating beverages and
narcotics.
Intoxicating beverages and narcotics
shall not be permitted or used in or
around mines. Persons under the influence of alcohol or narcotics shall not
be permitted on the job.
§ 57.20002
Potable water.
(a) An adequate supply of potable
drinking water shall be provided at all
active working areas.
(b) The common drinking cup and
containers from which drinking water
must be dipped or poured are prohibited.
(c) Where single service cups are supplied, a sanitary container for unused
cups and a receptacle for used cups
shall be provided.
(d) When water is cooled by ice, the
ice shall either be of potable water or
shall not come in contact with the
water.
(e) Potable water outlets shall be
posted.
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§ 57.20003
30 CFR Ch. I (7–1–19 Edition)
(f) Potable water systems shall be
constructed to prevent backflow or
backsiphonage of non-potable water.
§ 57.20003
Housekeeping.
At all mining operations—
(a) Workplaces, passageways, storerooms, and service rooms shall be kept
clean and orderly;
(b) The floor of every workplace shall
be maintained in a clean and, so far as
possible, dry condition. Where wet
processes are used, drainage shall be
maintained, and false floors, platforms,
mats, or other dry standing places
shall be provided where practicable;
and
(c) Every floor, working place, and
passageway shall be kept free from protruding nails, splinters, holes, or loose
boards, as practicable.
§ 57.20005
Carbon tetrachloride.
Carbon tetrachloride shall not be
used.
§ 57.20008
Toilet facilities.
(a) Toilet facilities shall be provided
at locations that are compatible with
the mine operations and that are readily accessible to mine personnel.
(b) The facilities shall be kept clean
and sanitary. Separate toilet facilities
shall be provided for each sex except
where toilet rooms will be occupied by
no more than one person at a time and
can be locked from the inside.
§ 57.20009
Tests for explosive dusts.
Dusts suspected of being explosive
shall be tested for explosibility. If tests
prove positive, appropriate control
measures shall be taken.
§ 57.20010
Retaining dams.
If failure of a water or silt retaining
dam will create a hazard, it shall be of
substantial construction and inspected
at regular intervals.
kpayne on VMOFRWIN702 with $$_JOB
§ 57.20011
signs.
Barricades
and
warning
Areas where health or safety hazards
exist that are not immediately obvious
to employees shall be barricaded, or
warning signs shall be posted at all approaches. Warning signs shall be readily visible, legible, and display the na-
ture of the hazard and any protective
action required.
§ 57.20013 Waste receptacles.
Receptacles with covers shall be provided at suitable locations and used for
the disposal of waste food and associated materials. They shall be emptied
frequently and shall be maintained in a
clean and sanitary condition.
§ 57.20014 Prohibited areas for food
and beverages.
No person shall be allowed to consume or store food or beverages in a
toilet room or in any area exposed to a
toxic material.
§ 57.20020 Unattended mine openings.
Access to unattended mine openings
shall be restricted by gates or doors, or
the openings shall be fenced and posted.
§ 57.20021 Abandoned mine openings.
Upon abandonment of a mine, the
owner or operator shall effectively
close or fence off all surface openings
down which persons could fall or
through which persons could enter.
Upon or near all such safeguards, trespass warnings and appropriate danger
notices shall be posted.
§ 57.20031 Blasting underground in
hazardous areas.
In underground areas where dangerous accumulations of water, gas,
mud, or fire atmosphere could be encountered, persons shall be removed to
safe places before blasting.
§ 57.20032 Two-way
communication
equipment for underground operations.
Telephones or other two-way communication equipment with instructions
for their use shall be provided for communication from underground operations to the surface.
Subpart T—Safety Standards for
Methane
in
Metal
and
Nonmetal Mines
AUTHORITY: 30 U.S.C. 811.
SOURCE: 52 FR 24941, July 1, 1987, unless
otherwise noted.
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Mine Safety and Health Admin., Labor
and usage which may be expected to
occur in the mining environment.
GENERAL
§ 57.22001
Scope.
This subpart T sets forth procedures
and safety standards for each metal
and nonmetal underground mine subject to the Federal Mine Safety and
Health Act of 1977. All metal and
nonmetal mines will be placed into one
of the categories or subcategories defined in this subpart. Mines shall operate in accordance with the applicable
standards in this subpart to protect
persons against the hazards of methane
gas and dust containing volatile matter. The standards in this subpart
apply to underground mines as well as
surface mills at Subcategory I-C mines.
These mines are also required to be operated in accordance with the other applicable health and safety standards
published in 30 CFR part 57.
kpayne on VMOFRWIN702 with $$_JOB
§ 57.22002
§ 57.22003
Definitions.
The following definitions apply in
this subpart:
Competent person. A person designated by the mine operator who has
sufficient experience and training to
perform the assigned task.
Explosive material. Explosives, blasting agents, and detonators. Explosives
are substances classified as explosives
by the Department of Transportation
in §§ 173.53, 173.88, and 173.100 of Title 49
of the Code of Federal Regulations
(1986 Edition). Blasting agents are substances classified as blasting agents by
the Department of Transportation in
§ 173.114(a) of Title 49 of the Code of
Federal Regulations (1986 Edition).
Detonators are devices containing a
detonating charge used to initiate explosives. Examples of detonators are
blasting caps, electric or non-electric
instantaneous or delay blasting caps
and delay connectors. [A copy of Title
49 is available at any Metal and
Nonmetal Mine Safety and Health District Office of the Mine Safety and
Health Administration].
Substantial construction. Construction
of such strength, material, and workmanship that the object will withstand
air blasts, blasting shock, ground
movement, pressure differentials, wear,
[52 FR 24941, July 1, 1987, as amended at 69
FR 38842, June 29, 2004]
MINE CATEGORIZATION
§ 57.22003 Mine
category.
category
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(a) All underground mines, and the
surface mills of Subcategory I-C mines
(gilsonite), shall be placed into one of
the following categories or subcategories to protect persons against the
hazards of methane and dusts containing volatile matter. Categories and
subcategories are defined as follows:
(1) Category I applies to mines that
operate within a combustible ore body
and either liberate methane or have
the potential to liberate methane based
on the history of the mine or the geological area in which the mine is located. Category I is divided into Subcategories I-A, I-B, and I-C as follows:
(i) Subcategory I-A applies to mines
that operate within a combustible ore
body and liberate methane and in
which—
(A) A concentration of 0.25 percent or
more methane has been detected in the
mine atmosphere and confirmed by laboratory analysis; or
(B) An ignition of methane has occurred.
(ii) Subcategory I-B applies to mines
that operate within a combustible ore
body and have the potential to liberate
methane based on the history of the
mine or geological area in which the
mine is located and in which—
(A) A concentration of 0.25 percent or
more methane has not been detected in
the mine atmosphere; and
(B) An ignition of methane has not
occurred.
(iii) Subcategory I-C applies to mines
in which the product extracted is combustible and the dust has a volatile
matter content of 60 percent or more
measured on a moisture free basis1.
1 Measured by the American Society for
Testing and Materials, ASTM D 3175–82,
Standard Test Method for Volatile Matter in
the Analysis Sample of Coal and Coke. (This
document is available at any Metal and
Nonmetal Mine Safety and Health District
Continued
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§ 57.22003
30 CFR Ch. I (7–1–19 Edition)
(2) Category II applies to domal salt
mines where the history of the mine or
geological area indicates the occurrence of or the potential for an outburst. Category II is divided into Subcategories II-A and II-B as follows:
(i) Subcategory II-A applies to domal
salt mines where an outburst reportable under § 57.22004(c)(1) has occurred.
(ii) Subcategory II-B applies to domal
salt mines where an outburst reportable under § 57.22004(c)(1) has not occurred, but which have the potential
for an outburst based on the history of
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Office of the Mine Safety and Health Administration).
the mine or geological area in which
the mine is located.
(3) Category III applies to mines in
which noncombustible ore is extracted
and which liberate a concentration of
methane that is explosive, or is capable
of forming explosive mixtures with air,
or have the potential to do so based on
the history of the mine or the geological area in which the mine is located.
The concentration of methane in such
mines is explosive or is capable of
forming explosive mixtures if mixed
with air as illustrated by Table 1
below, entitled ‘‘Relation Between
Quantitative
Composition
and
Explosibility of Mixtures of Methane
and Air’’.
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§ 57.22003
(4) Category IV applies to mines in
which noncombustible ore is extracted
and which liberate a concentration of
methane that is not explosive nor capable of forming explosive mixtures with
air based on the history of the mine or
the geological area in which the mine
is located. The concentration of methane in such mines is not explosive nor
capable of forming explosive mixtures
if mixed with air as illustrated by
Table 1 above, entitled ‘‘Relation Between Quantitative Composition and
Explosibility of Mixtures of Methane
and Air’’.
(5) Category V applies to petroleum
mines. Category V is divided into Subcategories V-A and V-B as follows:
(i) Subcategory V-A applies to petroleum mines that operate entirely or
partially within an oil reservoir; and
all other petroleum mines in which—
(A) A concentration of 0.25 percent or
more methane has been detected in the
mine atmosphere and confirmed by laboratory analysis; or
(B) An ignition of methane has occurred.
(ii) Subcategory V-B applies to petroleum mines that operate outside of and
drill into an oil resevoir and in which—
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EC21OC91.048
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Mine Safety and Health Admin., Labor
§ 57.22004
30 CFR Ch. I (7–1–19 Edition)
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(A) A concentration of 0.25 percent or
more methane has not been detected in
the mine atmosphere; and
(B) An ignition of methane has not
occurred.
(6) Category VI applies to mines in
which the presence of methane has not
been established and are not included
in another category or subcategory.
(b) Category or subcategory placement or change in placement shall include consideration of the following:
(1) The history and geology of the
mine or of the geological area in which
the mine is located;
(2) The ore body and host rock;
(3) The character, amount, duration,
origin, and nature of methane emission
and the presence of explosive dust and
inert gases; and
(4) Whether or not conditions encountered during primary or access development are transient or permanent.
(c)(1) Gas samples for the purpose of
category or subcategory placement or
change in placement, and for determining action levels, shall be taken in
the mine atmosphere. Gas samples
taken to determine the nature and extent of an occurrence under § 57.22004
(c) and (d) may be taken at any location, including the source, point of
entry and the mine atmosphere.
(2) Tests for methane shall be made
with hand-held methanometers, methane monitors, atmospheric monitoring
systems, devices used to provide laboratory analysis of samples, or with
other equally effective sampling devices. However, only methane samples
that have been confirmed by laboratory analysis shall be used for category
or subcategory placement or change in
placement.
(d) Each mine and mill shall be required to operate in accordance with
the safety standards applicable to its
particular category or subcategory.
§ 57.22004 Category
placement
or
change in placement.
The Administrator for Metal and
Nonmetal Mine Safety and Health (Administrator) shall be responsible for
category and subcategory placement,
change in placement, and notification
of placement of mines.
(a) The Administrator’s proposed notice of placement or change in place-
ment shall be sent to the mine operator and the appropriate representative
of miners and shall include—
(1) The category or subcategory;
(2) The reasons for placement or
change in placement;
(3) The data considered;
(4) The applicable standards and a
time schedule for the mine operator to
achieve compliance;
(5) Whether or not conditions encountered during primary or access development are transient or permanent; and
(6) Notification of the right to appeal
the
Administrator’s
determination
under § 57.22005.
(b) The operator or the representative of the miners shall have the right
to request of the Administrator reassignment of the mine to a more appropriate category or subcategory if,
based on operating experience, the conditions set forth in § 57.22003(b) indicate
that the hazards of methane exist
under circumstances more appropriately governed by a different category or subcategory. In response to
such a request, the procedures set forth
in paragraph (d) of this section shall
apply. While the request for category
or subcategory reassignment is pending, the mine shall continue to operate
under the standards for the category or
subcategory to which originally assigned.
(c) MSHA shall be notified as soon as
possible if any of the following events
occur:
(1) An outburst that results in 0.25
percent or more methane in the mine
atmosphere;
(2) A blowout that results in 0.25 percent or more methane in the mine atmosphere;
(3) An ignition of methane; or
(4) Air sample results that indicate
0.25 percent or more methane in the
mine atmosphere of a Subcategory I-B,
I-C, II-B, V-B or Category VI mine.
(d) The Administrator shall promptly
appoint an MSHA committee to investigate occurrences reported in accordance with paragraph (c) of this section
or requests filed in accordance with
paragraph (b) of this section. Upon
completion of an investigation, the
committee shall make a written report
of the findings. These investigations
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Mine Safety and Health Admin., Labor
§ 57.22005
may include an evaluation of the following:
(1) Source, nature, and extent of occurrences;
(2) Conditions under which the incident occurred;
(3) Samples and tests;
(4) Physical conditions at the time of
the occurrence;
(5) Charts, logs, and records related
to the occurrence;
(6) Whether the occurrence is isolated, continuous, or could recur;
(7) Conditions indicating that the
hazards of methane no longer exist or
exist under circumstances more appropriately governed by a different category or subcategory;
(8) The geology of the mine and the
geological area in which the mine is located; and
(9) Statements by witnesses, company officials, employees, and other
persons having knowledge of the mine
or the occurrence. Representatives of
the mine operator, the miners and the
appropriate State agency may participate in the investigation.
be in writing and contain the following
information:
(1) Name, address, and mine identification number;
(2) A concise statement of the reason
why the Administrator’s determination
is inappropriate; and
(3) A copy of the Administrator’s determination.
(c) The mine operator shall post a
copy of the Administrator’s determination and the request for a hearing on
the mine bulletin board, and shall
maintain the posting until the placement becomes final.
(d) Promptly after receipt of the request for a hearing, the Assistant Secretary shall refer to the Chief Administrative Law Judge, United States Department of Labor, the following:
(1) The request for a hearing;
(2) The Administrator’s determination; and
(3) All information upon which the
Administrator’s determination was
based.
(e) The hearing shall be regulated
and conducted by an Administrative
Law Judge in accordance with 29 CFR
part 18, entitled, ‘‘Rules of Practice
and Procedure for Administrative
Hearings Before the Office of Administrative Law Judges.’’ Once the Administrative Law Judge has made an initial decision and served each party, the
decision shall be final on the 30th day
after service, unless discretionary review is undertaken by the Assistant
Secretary or an appeal is filed by the
mine operator or representative of the
miners under paragraph (f) of this section.
(f) Within 30 days after service of an
initial decision of an Administrative
Law Judge, the Assistant Secretary for
Mine Safety and Health may undertake
a discretionary review of the initial decision, or the mine operator, or representative of the miners may appeal
the initial decision of the Administrative Law Judge to the Assistant Secretary.
(1) The Assistant Secretary shall give
notice of discretionary review to the
mine operator and representative of
the miners. The mine operator or representative of the miners shall give notice of an appeal to the other party.
The notice shall specify the suggested
[52 FR 24941, July 1, 1987, as amended at 52
FR 41397, Oct. 27, 1987; 60 FR 33722, June 29,
1995]
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§ 57.22005 Notice and appeal of placement or change in placement.
(a) The Administrator’s determination of category or subcategory placement or change in placement shall become final upon the 30th day after it is
served on the mine operator and representative of miners, unless a request
for a hearing has been filed. Service of
the Administrator’s determination is
complete upon mailing by registered or
certified mail, return receipt requested.
(b) The mine operator or representative of miners may obtain review of the
Administrator’s determination by filing a request for a hearing with the Assistant Secretary of Labor for Mine
Safety and Health, Mine Safety and
Health Administration, 201 12th Street
South, Arlington, VA 22202–5452 within
30 days of the Administrator’s determination. Service of a request for hearing is completed upon mailing by registered or certified mail, return receipt
requested. Requests for a hearing shall
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§ 57.22101
30 CFR Ch. I (7–1–19 Edition)
changes and refer to the specific findings of fact, conclusions of law, and
terms of the initial decision to be reviewed or appealed. The Assistant Secretary shall fix a time for filing any objections to the suggested changes and
supporting reasons.
(2) The Assistant Secretary shall
promptly notify the Administrative
Law Judge of a discretionary review or
an appeal. The entire record of the proceedings shall be transmitted to the
Assistant Secretary for review.
(3) The Assistant Secretary shall
make the final decision based upon
consideration of the record of the proceedings. The final decision may affirm, modify, or set aside in whole or in
part, the findings and conclusions contained in the initial decision. A statement of reasons for the action taken
shall be included in the final decision.
The final decision shall be served upon
the mine operator and representative
of the miners.
(g) Unless a decision by the Administrator for Metal and Nonmetal Mine
Safety and Health, or the initial decision of the Administrative Law Judge,
is appealed within 30 days, it becomes
final, and is not subject to judicial review for the purposes of 5 U.S.C. 704.
Only a decision by the Assistant Secretary shall be considered final Agency
action for purposes of judicial review.
Any such appeal must be filed in the
appropriate circuit of the United
States Court of Appeal.
(h) While a final decision of category
placement is pending the following procedures shall apply:
(1) Where a mine has been classified
as gassy prior to the effective date of
these standards, existing gassy mines
standards 30 CFR 57.21001 through
57.21101 (1986 Edition) shall continue to
be applicable until placement is final.
(2) Where a mine has not been classified as gassy prior to the effective date
of these standards and it is placed in
Categories I through V, the mine shall
comply with Category VI standards
(§§ 57.22231,
57.22232,
57.22236,
and
57.22238) until placement is final.
(3) Where a mine has been classified
in Categories I through V after the effective date of these standards and category reassignment is being considered, the mine shall comply with the
standards applicable to the category to
which presently assigned until category placement is final.
[52 FR 24941, July 1, 1987; 52 FR 27903, July 24,
1987, as amended at 67 FR 38385, June 4, 2002;
80 FR 52988, Sept. 2, 2015]
FIRE PREVENTION AND CONTROL
NOTE: The Category or Subcategory applicability of each standard appears in the parentheses of each standard’s title line].
§ 57.22101 Smoking (I-A, II-A, III, and
V-A mines).
Persons shall not smoke or carry
smoking materials, matches, or lighters underground. The operator shall institute a reasonable program to assure
that persons entering the mine do not
carry such items.
§ 57.22102 Smoking (I-C mines).
(a) Persons shall not smoke or carry
smoking materials, matches, or lighters underground or within 50 feet of a
mine opening. The operator shall institute a reasonable program to assure
that persons entering the mine do not
carry such items.
(b) Smoking is prohibited in surface
milling facilities except in designated,
dust-free smoking areas.
§ 57.22103 Open flames (I-A, II-A, III,
and V-A mines).
Open flames shall not be permitted
underground except for welding, cutting, and other maintenance operations, and for igniting underground
retorts in a Subcategory I-A mine.
When using open flames in other than
fresh air, or in places where methane
may enter the air current, tests for
methane shall be conducted by a competent person before work is started
and every 10 minutes until the job is
completed. Continuous methane monitors with audible alarms may be used
after the initital test has been conducted as an alternative to the tenminute interval testing requirement.
Open flames shall not be used in
atmospheres containing 0.5 percent or
more methane.
§ 57.22104 Open flames (I-C mines).
(a) Open flames, including cutting
and welding, shall not be used underground.
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Mine Safety and Health Admin., Labor
§ 57.22204
(b) Welding and cutting shall not be
done within 50 feet of a mine opening
unless all persons are out of the mine
and the mine opening is covered. The
cover shall be a substantial material,
such as metal or wood, topped with a
layer of wetted material to prevent
sparks and flames from entering the
mine opening.
would be created by an explosion underground. The area of the doors or
weak-wall shall be at least equivalent
to the average cross-sectional area of
the airway.
(c) (1) All main fan-related electrical
equipment and cables located within or
exposed to the forward or reverse airstream shall be approved by MSHA
under the appliable requirements of 30
CFR part 18;
(2) Drive belts and nonmetallic fan
blades shall be constructed of staticconducting material; and
(3) Aluminum alloy fan blades shall
not contain more than 0.5 percent magnesium. [Paragraph (c)(3) of this section does not apply to Subcategory I-C
mines].
(d) When an internal combustion engine is used to power a main fan or as
standby power, the engine shall be—
(1) Installed in a noncombustible
housing;
(2) Protected from a possible fuel
supply fire or explosion; and
(3) Located out of direct line with the
forward and reverse airstream provided
by the fan. Engine exhaust gases shall
be vented to the atomsphere so that exhaust cannot contaminate mine intake
air.
(e) For Subcategory I-A mines only:
Main exhaust fans shall be equipped
with methane monitors to give an
alarm when methane in the return air
reaches 0.5 percent. The alarm shall be
located so that it can be seen or heard
by a person designated by the mine operator.
§ 57.22105 Smoking and open flames
(IV mines).
Smoking or open flames shall not be
permitted in a face or raise, or during
release of gas from a borehole until
tests have been conducted in accordance with § 57.22226 and the methane
level has been determined to be below
0.5 percent.
§ 57.22106 Dust
containing
volatile
matter (I-C mines).
Dust containing volatile matter shall
not be allowed to accumulate on the
surfaces of enclosures, facilities, or
equipment used in surface milling in
amounts that, if suspended in air,
would become an explosive mixture. An
explosive mixture of dust containing
volatile matter is 0.02 ounce or more
per cubic foot of air.
VENTILATION
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§ 57.22201 Mechanical ventilation (I-A,
I-B, I-C, II-A, II-B, III, IV, V-A, and
V-B mines).
All mines shall be ventilated mechanically.
§ 57.22202 Main fans (I-A, I-B, I-C, II-A,
III, V-A, and V-B mines).
(a) Main fans shall be—
(1) Installed on the surface in noncombustible housings provided with
noncombustible air ducts;
(2) Except in Subcategory I-A mines,
provided with an automatic signal device to give an alarm when the fan
stops. The signal device shall be located so that it can be seen or heard by
a person designated by the mine operator.
(b) Fan installations shall be—
(1) Offset so that the fan and its associated components are not in direct
line with possible explosive forces;
(2) Equipped with explosion-doors, a
weak-wall, or other equivalent devices
located to relieve the pressure that
[52 FR 24941, July 1, 1987, as amended at 52
FR 41397, Oct. 27, 1987]
§ 57.22203 Main
mines).
fan
operation
Main fans shall be operated continuously while ore production is in
progress.
§ 57.22204 Main fan operation and inspection (I-A, II-A, III, and V-A
mines).
Main fans shall be—
(a) Provided with a pressure-recording system; and
(b) Inspected daily while operating if
persons are underground. Certification
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§ 57.22205
30 CFR Ch. I (7–1–19 Edition)
of inspections shall be made by signature and date. Certifications and pressure recordings shall be retained for at
least one year and made available to an
authorized representative of the Secretary.
[52 FR 24941, July 1, 1987, as amended at 52
FR 41397, Oct. 27, 1987; 60 FR 33722, June 29,
1995]
§ 57.22205 Doors on main fans (I-A, IIA, III, and V-A mines).
In mines ventilated by multiple main
fans, each main fan installation shall
be equipped with noncombustible
doors. Such doors shall automatically
close to prevent air reversal through
the fan. The doors shall be located so
that they are not in direct line with explosive forces which could come out of
the mine.
§ 57.22206 Main ventilation failure (IA, II-A, III, and V-A mines).
(a) When there has been a main ventilation failure, such as stoppage of
main fans or failure of other components of the main ventilation system,
tests for methane shall be conducted in
affected active workings until normal
air flow has resumed.
(b) If a total failure of ventilation occurs while all persons are out of the
mine and the failure lasts for more
than 30 minutes, only competent persons shall be allowed underground to
examine the mine or to make necessary ventilation changes. Other persons may reenter the mine after the
main fans have been operational for at
least 30 minutes, or after the mine atmosphere has been tested and contains
less than 1.0 percent methane. Persons
other than examiners shall not reenter
a Subcategory II-A mine until the
methane level is less than 0.5 percent.
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§ 57.22207 Booster fans (I-A, II-A, III,
and V-A mines).
(a) Booster fans shall be approved by
MSHA under the applicable requirements of 30 CFR part 18, and be—
(1) Provided with an automatic signal
device located so that it can be seen or
heard by a person designated by the
mine operator to give an alarm when
the fan stops or when methane reaches
the following levels:
(i) 1.0 percent at the fan in Subcategory I-A, Category III, and Subcategory V-A mines; and
(ii) 0.5 percent at the fan in Subcategory II-A mines.
(2) Equipped with a device that automatically deenergizes power in affected
workings should the fan stop; and
(3) Equipped with starting and stopping controls located at the fan and at
another accessible remote location.
(b) Booster fan installations, except
for booster fans installed in ducts,
shall be—
(1) Provided with doors which open
automatically when all fans in the installation stop; and
(2) Provided with an air lock when
passage through the fan bulkhead is
necessary.
§ 57.22208 Auxiliary fans (I-A, II-A, III,
and V-A mines).
(a) Auxiliary fans, except fans used in
shops and other areas which have been
so designed that methane cannot enter
the airway, shall be approved by MSHA
under the applicable requirements of 30
CFR part 18, and be operated so that
recirculation is minimized. Auxiliary
fans shall not be used to ventilate work
places during the interruption of normal mine ventilation.
(b) Tests for methane shall be made
at auxiliary fans before they are started.
§ 57.22209
Auxiliary fans (I-C mines).
Electric auxiliary fans shall be approved by MSHA under the applicable
requirements of 30 CFR part 18. Tests
for methane shall be made at electric
auxiliary fans before they are started.
Such fans shall not be operated when
air passing over or through them contains 0.5 percent or more methane.
§ 57.22210
In-line filters (I-C mines).
Filters or separators shall be installed on air-lift fan systems to prevent explosive concentrations of dust
from passing through the fan.
§ 57.22211
Air flow (I-A mines).
The average air velocity in the last
open crosscut in pairs or sets of developing entries, or through other ventilation openings nearest the face, shall be
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Mine Safety and Health Admin., Labor
§ 57.22218
at least 40 feet per minute. The velocity of air ventilating each face at a
work place shall be at least 20 feet per
minute.
equivalent, and provided with pressurerelief devices.
(b) During development of openings
to the surface—
(1) Ventilation tubing approved by
MSHA in accordance with 30 CFR part
7 or previously issued a BC or VT acceptance number by the MSHA Approval and Certification Center may be
used for separation of main air currents in the same opening. Flexible
ventilation tubing shall not exceed 250
feet in length.
(2) Only development related to making a primary ventilation connection
may be performed beyond 250 feet of
the shaft.
§ 57.22212 Air flow (I-C, II-A, and V-A
mines).
Air flow across each working face
shall be sufficient to carry away any
accumulation of methane, smoke,
fumes, and dust.
§ 57.22213
Air flow (III mines).
The quantity of air coursed through
the last open crosscut in pairs or sets
of entries, or through other ventilation
openings nearest the face, shall be at
least 6,000 cubic feet per minute, or
9,000 cubic feet per minute in longwall
and continuous miner sections. The
quantity of air across each face at a
work place shall be at least 2,000 cubic
feet per minute.
§ 57.22214 Changes in ventilation (I-A,
II-A, III, and V-A mines).
(a) Changes in ventilation which affect the main air current or any split
thereof and which adversely affect the
safety of persons in the mine shall be
made only when the mine is idle.
(b) Only persons engaged in making
such ventilation changes shall be permitted in the mine during changes.
(c) Power shall be deenergized in affected areas prior to making ventilation changes, except power to monitoring equipment determined by MSHA
to be intrinsically safe under 30 CFR
part 18. Power shall not be restored
until the results of the change have
been determined and a competent person has examined affected working
places for methane.
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§ 57.22215 Separation of intake and return air (I-A, II-A, III, and V-A
mines).
Main intake and return air currents
shall be coursed through separate mine
openings and shall be separated
throughout the mine, except—
(a) Where multiple shafts are used for
ventilation and a single shaft contains
a curtain wall or partition for separation of air currents. Such wall or partition shall be constructed of reinforced
concrete or other noncombustible
[52 FR 24941, July 1, 1987, as amended at 54
FR 30508, July 20, 1989]
§ 57.22216 Separation of intake and return air (I-C mines).
The main intake and return air currents in single shafts shall be separated
by ventilation tubing, curtain walls, or
partitions. Ventilation tubing shall be
constructed of noncombustible material. Curtain walls or partitions shall
be constructed of reinforced concrete
or other noncombustible equivalent,
and provided with pressure-relief devices.
§ 57.22217 Seals and stoppings (I-A, IB, and I-C mines).
All seals, and those stoppings that
separate main intake from main return
airways, shall be of substantial construction and constructed of noncombustible materials, except that
stoppings constructed of brattice materials may be used in face areas.
§ 57.22218 Seals and stoppings (III, VA, and V-B mines).
(a) All seals, and those stoppings that
separate main intake from main return
airways, shall be of substantial construction, except that stoppings constructed of brattice materials may be
used in face areas.
(b) Exposed surfaces on the intake
side of stoppings constructed of combustible materials or foam-type blocks
shall be coated with at least one inch
of construction plaster containing perlite and gypsum; at least one inch of
expanded vermiculite, Portland cement
and limestone; or other coatings with
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§ 57.22219
30 CFR Ch. I (7–1–19 Edition)
equivalent fire resistance. Stoppings
constructed to phenolic foam blocks at
least 12 inches thick need not be coated
for fire resistance. All foam-type
blocks used for stopping construction
shall be solid.
(c) Exposed surfaces on the fresh air
side of seals constructed of combustible materials shall be coated with at
least one inch of construction plaster
containing perlite and gypsum; at least
one inch of expanded vermiculite, Portland cement and limestone; or other
coatings with equivalent fire resistance. Foam-type blocks shall not be
used for seals.
§ 57.22219 Seals and stoppings (II-A
mines).
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(a) Exposed surfaces on the intake
side of stoppings constructed of combustible materials, except brattice,
shall be coated with at least one inch
of construction plaster containing perlite and gypsum; at least one inch of
expanded vermiculite, Portland cement
and limestone; or other coatings with
equivalent fire resistance.
(b) Seals shall be of substantial construction. Exposed surfaces on the
fresh air side of seals constructed of
combustible materials shall be coated
with at least one inch of construction
plaster containing perlite and gypsum;
at least one inch of expanded
vermiculite, Portland cement and
limestone; or other coatings with
equivalent fire resistance. Foam-type
blocks shall not be used for seals.
(b)(1) Constructed of noncombustible
materials; or
(2) Where constructed of combustible
materials, the outside surfaces shall be
coated with at least one inch of construction plaster containing perlite
and gypsum; at least one inch of expanded vermiculite, Portland cement
and limestone; or other coatings with
equivalent fire resistance;
(c) Kept clear of obstructions.
§ 57.22222 Ventilation materials (I-A, IB, I-C, II-A, III, V-A, and V-B mines).
Brattice cloth and ventilation tubing
shall be approved by MSHA in accordance with 30 CFR part 7, or shall bear
a BC or VT acceptance number issued
by the MSHA Approval and Certification Center.
[54 FR 30508, July 20, 1989]
§ 57.22223 Crosscuts before abandonment (III mines).
A means of ventilating faces shall be
provided before workings are abandoned in unsealed areas, unless crosscuts are provided within 30 feet of the
face.
§ 57.22224 Auxiliary equipment
tions (I-A and III mines).
Battery charging stations, compressor stations, pump stations, and
transformer stations shall be installed
in intake air at locations which are
sufficiently ventilated to prevent the
accumulation of methane.
§ 57.22220 Air passing unsealed areas
(I-A, II-A, III, and V-A mines).
§ 57.22225 Auxiliary
tions (I-C mines).
Air that has passed by or through unsealed abandoned or unsealed inactive
areas and contains 0.25 percent or more
methane shall—
(a) Be coursed directly to a return
airway;
(b) Be tested daily for methane by a
competent person; and
(c) Not be used to ventilate work
places.
Battery charging stations, compressor stations, and electrical substations shall not be installed underground or within 50 feet of a mine
opening.
§ 57.22221 Overcast and undercast construction (I-A, II-A, III, and V-A
mines).
Overcasts and undercasts shall be—
(a) Of substantial construction;
§ 57.22226 Testing
mines).
equipment
for
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sta-
(IV
Tests for methane shall be conducted
in the mine atmosphere by a competent person—
(a) At least once each shift prior to
starting work in each face and raise;
and
(b) Upon initial release of gas into
the mine atmosphere from boreholes.
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Mine Safety and Health Admin., Labor
§ 57.22230
§ 57.22227 Approved testing devices (IA, I-B, I-C, II-A, II-B, III, IV, V-A,
and V-B mines).
(a) Methane monitoring devices and
portable, battery-powered, self-contained devices used for measuring
methane, other gases, and contaminants in mine air shall be approved by
MSHA under the applicable requirements of 30 CFR parts 18, 21, 22, 23, 27,
and 29. Such devices shall be maintained in accordance with manufacturers’ instructions, or an equivalent
maintenance and calibration procedure.
(b)(1) Flame safety lamps shall not be
used to test for methane except as supplementary devices.
(2) Flame safety lamps shall not be
used in Subcategory I-C mines.
(c)(1) If electrically powered, remote
sensing devices are used, that portion
of the instrument located in return air
or other places where combustible
gases may be present shall be approved
by MSHA under the applicable requirements of 30 CFR parts 18, 22, 23, 27, and
29.
(2) If air samples are delivered to remote analytical devices through sampling tubes, such tubes shall be provided with in-line flame arrestors.
Pumping equipment and analytical instruments shall be located in intake
air.
mine shall be approved by MSHA under
the applicable requirements of 30 CFR
parts 18 through 36.
§ 57.22228 Preshift examination (I-A, IC, II-A, III, and V-A mines).
(a) Preshift examinations shall be
conducted within three hours prior to
the start of the shift for which the examination is being made.
(b) Prior to the beginning of a shift
following an idle shift, a competent
person shall test the mine atmosphere
for methane at all work places before
persons other than examiners enter the
mine.
(c) When one shift immediately follows another, a competent person shall
test the mine atmosphere at each active working face for methane before
work is started on that shift.
(d) A competent person shall test the
mine atmosphere at each face blasted
before work is started.
(e) Except in Subcategory I-C or Category III mines, vehicles used for
transportation when examining the
[52 FR 24941, July 1, 1987, as amended at 53
FR 9615, Mar. 24, 1988]
§ 57.22229 Weekly testing (I-A, III, and
V-A mines).
(a) The mine atmosphere shall be
tested for methane and carbon monoxide at least once every seven days by
a competent person or an atmospheric
monitoring system, or a combination
of the two. Such testing shall be done
at the following locations:
(1) The return of each split where it
enters the main return;
(2) Adjacent to retreat areas, if accessible;
(3) At least one seal of each sealed
area, if accessible;
(4) Main returns;
(5) At least one entry of each intake
and return;
(6) Idle workings; and
(7) Return air from unsealed abandoned workings.
(b) The volume of air (velocity in
Subcategory I-A mines) shall be measured at least once every seven days by
a competent person. Such measurement shall be done at the following locations:
(1) Entering main intakes;
(2) Leaving main returns;
(3) Entering each main split;
(4) Returning from each main split;
and
(5) In the last open crosscuts or other
ventilation openings nearest the active
faces where the air enters the return.
(c) Where such examinations disclose
hazardous conditions, affected persons
shall be informed and corrective action
shall be taken.
(d) Certification of examinations
shall be made by signature and date.
Certifications shall be retained for at
least one year and made available to
authorized representatives of the Secretary.
[52 FR 24941, July 1, 1987, as amended at 52
FR 41397, Oct. 27, 1987]
§ 57.22230 Weekly testing (II-A mines).
(a) The mine atmosphere shall be
tested for methane at least once every
seven days by a competent person or an
atmospheric monitoring system, or a
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§ 57.22231
30 CFR Ch. I (7–1–19 Edition)
combination of the two. Such testing
shall be done at the following locations:
(1) Active mining faces and benches;
(2) Main returns;
(3) Returns from idle workings;
(4) Returns from abandoned workings; and
(5) Seals.
(b) Where such examinations disclose
hazardous conditions, affected persons
shall be informed and corrective action
shall be taken.
(c) Certification of examinations
shall be made by signature and date.
Certifications shall be kept for at least
one year and made available to authorized representatives of the Secretary.
[52 FR 24941, July 1, 1987, as amended at 52
FR 41397, Oct. 27, 1987; 60 FR 33723, June 29,
1995]
§ 57.22231 Actions at 0.25 percent
methane (I-B, II-B, V-B, and VI
mines).
If methane reaches 0.25 percent in the
mine atmosphere, changes shall be
made to improve ventilation, and
MSHA shall be notified immediately.
§ 57.22232 Actions at 0.5 percent methane (I-B, II-A, II-B, IV, V-B, and VI
mines).
If methane reaches 0.5 percent in the
mine atmosphere, ventilation changes
shall be made to reduce the level of
methane. Until methane is reduced to
less than 0.5 percent, electrical power
shall be deenergized in affected areas,
except power to monitoring equipment
determined by MSHA to be intrinsically safe under 30 CFR part 18. Diesel
equipment shall be shut off or immediately removed from the area and no
other work shall be permitted in affected areas.
kpayne on VMOFRWIN702 with $$_JOB
[52 FR 24941, July 1, 1987; 52 FR 27903, July 24,
1987]
§ 57.22233 Actions at 0.5 percent methane (I-C mines).
If methane reaches 0.5 percent in the
mine atmosphere, ventilation changes
shall be made to reduce the level of
methane. Until methane is reduced to
less than 0.5 percent, no other work
shall be permitted in affected areas.
[52 FR 24941, July 1, 1987; 52 FR 27903, July 24,
1987]
§ 57.22234 Actions at 1.0 percent methane (I-A, I-B, III, V-A, and V-B
mines).
(a) If methane reaches 1.0 percent in
the mine atmosphere, ventilation
changes shall be made to reduce the
methane. Until such changes are
achieved—
(1) All persons other than competent
persons necessary to make the ventilation changes shall be withdrawn from
affected areas;
(2) Electrical power shall be deenergized in affected areas, except power to
monitoring equipment determined by
MSHA to be intrinsically safe under 30
CFR part 18; and
(3) Diesel equipment shall be shut off
or immediately removed from the area.
(b) If methane reaches 1.0 percent at
a main exhaust fan, electrical power
underground shall be deenergized, except power to monitoring equipment
determined by MSHA to be intrinsically safe under 30 CFR part 18, and all
persons shall be withdrawn from the
mine.
(c) If methane reaches 1.0 percent at
a work place and there has been a failure of the main ventilation system, all
persons shall be withdrawn from the
mine.
[52 FR 24941, July 1, 1987, as amended at 53
FR 9615, Mar. 24, 1988]
§ 57.22235 Actions at 1.0 percent methane (I-C, II-A, II-B, and IV mines).
(a) If methane reaches 1.0 percent in
the mine atmoshpere, all persons other
than competent persons necessary to
make ventilation changes shall be
withdrawn from affected areas until
methane is reduced to less than 0.5 percent.
(b) If methane reaches 1.0 percent at
a work place and there has been a failure of the main ventilation system, all
persons shall be withdrawn from the
mine.
§ 57.22236 Actions at 1.0 percent methane (VI mines).
If methane reaches 1.0 percent in the
mine atmosphere, all persons other
than competent persons necessary to
make ventilation changes shall be
withdrawn from affected areas until
methane is reduced to less than 0.5 percent.
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Mine Safety and Health Admin., Labor
§ 57.22301
§ 57.22237 Actions at 2.0 to 2.5 percent
methane in bleeder systems (I-A
and III mines).
(2) 200 feet of an unsurveyed abandoned mine or abandoned workings
which cannot be inspected.
(b) Boreholes shall be drilled in such
a manner to insure that the advancing
face will not accidently break into an
abandoned mine or abandoned working.
If methane reaches 2.0 percent in
bleeder systems at the point where a
bleeder split enters a main return split,
mining shall not be permitted on ventilation splits affected by the bleeder
system. If methane has not been reduced to less than 2.0 percent within 30
minutes, or if methane levels reach 2.5
percent, all persons other than competent persons necessary to take corrective action shall be withdrawn from
affected areas.
§ 57.22238 Actions at 2.0 percent methane (I-B, II-B, V-B, and VI mines).
If methane reaches 2.0 percent in the
mine atmosphere, all persons other
than competent persons necessary to
make ventilation changes shall be
withdrawn from the mine until methane is reduced to less than 0.5 percent.
§ 57.22239 Actions at 2.0 percent methane (IV mines).
If methane reaches 2.0 percent in the
mine atmosphere, all persons other
than competent persons necessary to
make ventilation changes shall be
withdrawn from the mine until methane is reduced to less than 0.5 percent.
MSHA shall be notified immediately.
[52 FR 24941, July 1, 1987, as amended at 52
FR 41397, Oct. 27, 1987; 60 FR 33723, June 29,
1995]
§ 57.22240 Actions at 2.0 percent methane (V-A mines).
If methane reaches 2.0 percent in the
mine atmosphere, all persons other
than competent persons necessary to
make ventilation changes shall be
withdrawn from affected areas until
methane is reduced to less than 1.0 percent.
[52 FR 24941, July 1, 1987; 52 FR 27903, July 24,
1987]
kpayne on VMOFRWIN702 with $$_JOB
§ 57.22241 Advance face boreholes (I-C
mines).
(a) Boreholes shall be drilled at least
25 feet in advance of a face whenever
the work place is within—
(1) 50 feet of a surveyed abandoned
mine or abandoned workings which
cannot be inspected; or
EQUIPMENT
§ 57.22301 Atmospheric
monitoring
systems (I-A, II-A, and V-A mines).
(a) An atmospheric monitoring system shall be installed to provide surface readings of methane concentrations in the mine atmosphere from underground locations. Components of
the system shall be approved by MSHA
under the applicable requirements of 30
CFR parts 18, 22, 23, and 27; or be determined by MSHA under 30 CFR part 18
to be intrinsically safe or explosionproof.
(b) Atmospheric monitoring systems
shall—
(1) Give warnings on the surface and
underground when methane at any sensor reaches 0.5 percent or more, and
when power to a sensor is interrupted.
Warning devices shall be located so
that they can be seen and heard by a
person designated by the mine operator; and
(2) Automatically deenergize power
in affected areas, except power to monitoring equipment determined by
MSHA to be intrinsically safe under 30
CFR part 18, when methane at any sensor reaches—
(i) 1.0 percent in a Subcategory I-A or
V-A mine; or
(ii) 0.5 percent while persons are underground and 1.0 percent during blasting in a Subcategory II-A mine. Timing
devices are permitted to avoid nuisance tripping for periods not to exceed
30 seconds, except during blasting or
the ventilation time following a blast
in a Subcategory II-A mine.
(c) Atmospheric monitoring systems
shall be checked with a known mixture
of methane, and calibrated if necessary
at least once every 30 days. Certification of calibration tests shall be
made by signature and date. Certifications of tests shall be retained for at
least one year and made available to
authorized representatives of the Secretary.
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§ 57.22302
30 CFR Ch. I (7–1–19 Edition)
§ 57.22302 Approved
and V-A mines).
equipment
(I-A
Equipment used in or beyond the last
open crosscut shall be approved by
MSHA under the applicable requirements of 30 CFR parts 18 through 36.
Equipment shall not be operated in
atmospheres containing 1.0 percent or
more methane.
§ 57.22303 Approved
mines).
equipment
(I-C
Only electrical equipment that is approved by MSHA under the applicable
requirements of 30 CFR parts 18
through 28 or approved under 30 CFR
part 29 contained in the 30 CFR, parts
1–199, edition, revised as of July 1, 1999,
shall be used underground, except for
submersible sump pumps.
[64 FR 43283, Aug. 10, 1999]
§ 57.22304 Approved
mines).
equipment
(II-A
(a) Cutting and drilling equipment
used at a face or bench shall be approved by MSHA under the applicable
requirements of 30 CFR parts 18
through 36.
(b) While cutting or drilling is in
progress, equipment not approved by
MSHA under the applicable requirements of 30 CFR parts 18 through 36
shall remain at least 100 feet from the
face or bench being mined.
(c) Tests for methane shall be conducted
immediately
before
nonapproved equipment is taken to a face
or bench after blasting.
(d) Mine power transformers and stationary equipment not approved by
MSHA under the applicable requirements of 30 CFR parts 18 through 36
shall be installed in fresh air or downwind from an atmospheric methane
monitor sensor.
kpayne on VMOFRWIN702 with $$_JOB
§ 57.22305 Approved
mines).
equipment
(III
Equipment used in or beyond the last
open crosscut and equipment used in
areas where methane may enter the air
current, such as pillar recovery workings, longwall faces and shortwall
faces, shall be approved by MSHA
under the applicable requirements of 30
CFR parts 18 through 36. Equipment
shall not be operated in atmospheres
containing 1.0 percent or more methane.
§ 57.22306 Methane
mines).
monitors
(a) Methane monitors shall be installed on continuous mining machines, longwall mining systems, and
on loading and haulage equipment used
in or beyond the last open crosscut.
(b) The monitors shall—
(1) Give warning at 1.0 percent methane;
(2) Automatically deenergize electrical equipment, except power to monitoring equipment determined by
MSHA to be intrinsically safe under 30
CFR part 18, and prevent starting such
equipment when methane levels reach
1.5 percent. Diesel equipment shall be
shut off or immediately removed from
the affected area; and
(3) Automatically deenergize electrical equipment when power to a sensor is interrupted. Diesel equipment
shall not be operated if the monitor is
inoperative.
(c) Sensing units of monitors shall be
positioned at a location which provides
for the most effective measurement of
methane.
§ 57.22307 Methane
mines).
monitors
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(II-A
(a) Methane monitors shall be installed on continuous mining machines, longwall mining systems, bench
and face drills, and undercutting machines used in or beyond the last open
crosscut.
(b) The monitors shall—
(1) Give warning at 0.5 percent methane;
(2) Automatically deenergize electrical equipment, except power to monitoring equipment determined by
MSHA to be intrinsically safe under 30
CFR part 18, and prevent starting such
equipment when methane levels reach
1.0 percent; and
(3) Automatically deenergize the
equipment when power to a sensor is
interrupted.
(c) Sensing units of monitors shall be
positioned at a location which provides
for the most effective measurement of
methane.
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Mine Safety and Health Admin., Labor
§ 57.22308 Methane
mines).
monitors
(III
(a) Methane monitors shall be installed on continuous mining machines
and longwall mining systems.
(b) The monitors shall—
(1) Give warning at 1.0 percent methane;
(2) Automatically deenergize electrical equipment, except power to monitoring equipment determined by
MSHA to be intrinsically safe under 30
CFR part 18, and prevent starting such
equipment when methane levels reach
1.5 percent; and
(3) Automatically deenergize the
equipment when power to a sensor is
interrupted.
(c) Sensing units of monitors shall be
positioned at a location which provides
for the most effective measurement of
methane.
§ 57.22309 Methane
mines).
monitors
(V-A
(a) Methane monitors shall be installed on continuous mining machines
used in or beyond the last open crosscut.
(b) The monitors shall—
(1) Give warning at 1.0 percent methane.
(2) Automatically deenergize electrical equipment, except power to monitoring equipment determined by
MSHA to be intrinsically safe under 30
CFR part 18, and prevent starting of
such equipment when methane levels
reach 1.5 percent; and
(3) Automatically deenergize the
equipment when power to a sensor is
interrupted.
(c) Sensing units of monitors shall be
positioned at a location which provides
for the most effective measurement of
methane.
kpayne on VMOFRWIN702 with $$_JOB
§ 57.22310
Electrical cables (I-C mines).
Electrical cables used to power submersible sump pumps shall be accepted
or approved by MSHA as flame resistant, or be installed in continuous
metal conduit or metal pipe. The ends
of such conduit or pipe shall be sealed
to prevent entry of explosive gas or
dust.
[57 FR 61223, Dec. 23, 1992]
§ 57.22315
§ 57.22311 Electrical
mines).
cables
Only jacketed electrical cables accepted or approved by MSHA as flame
resistant shall be used to supply power
to distribution boxes and electrical
equipment operating in face and bench
areas.
[57 FR 61223, Dec. 23, 1992]
§ 57.22312 Distribution boxes (II-A and
V-A mines).
Distribution boxes containing short
circuit protection for trailing cables of
approved equipment shall be approved
by MSHA under 30 CFR part 18.
§ 57.22313 Explosion-protection
tems (I-C mines).
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Pressure-relief systems including
vents, or explosion suppression systems, shall be provided on explosive
dust handling and processing equipment and on facilities housing such
equipment. Vents shall be installed so
that forces are directed away from persons should an explosion occur. The
ratio of vent size to internal size of the
equipment or facility shall not be less
than one square foot of vent for each 80
cubic feet of volume or space.
§ 57.22314 Flow-control
and V-B mines).
devices
(V-A
Oil recovery drill holes that penetrate oil bearing formations shall have
devices to control the release of liquid
hydrocarbons and hazardous gases during the drilling process. Such devices
may be recovered for reuse after the
formation has been depressurized or
the well or borehole has been capped or
connected to a collection system.
§ 57.22315 Self-contained breathing apparatus (V-A mines).
Self-contained breathing apparatus
of a duration to allow for escape from
the mine and sufficient in number to
equip all persons underground shall be
strategically located throughout the
mine. Such apparatus shall be approved
by MSHA and NIOSH under 42 CFR
part 84 and shall be maintained in accordance with manufacturers’ specifications. This standard does not apply
to double entry mining systems where
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§ 57.22401
30 CFR Ch. I (7–1–19 Edition)
crosscut intervals do not exceed 250
feet.
[52 FR 24941, July 1, 1987, as amended at 60
FR 30401, June 8, 1995]
UNDERGROUND RETORTS
§ 57.22401 Underground
and I-B mines).
retorts
(I-A
(a) Retorts shall be provided with—
(1) Two independent power sources
for main mine ventilation fans and
those fans directly ventilating retort
bulkheads, and for retort blowers, and
provisions for switching promptly from
one power source to the other; and
(2) An alarm system for blower malfunctions and an evacuation plan to assure safety of personnel in the event of
a failure.
(b) Prior to the ignition of underground retorts, a written ignition and
operation plan shall be submitted to
the MSHA District Manager for the
area in which the mine is located. The
mine operator shall comply with all
provisions of the retort plan. The retort plan shall include—
(1) Acceptable levels of combustible
gases and oxygen in retort off-gases
during start-up and during burning;
levels at which corrective action will
be initiated; levels at which personnel
will be removed from the retort areas,
from the mine, and from endangered
surface areas; and the conditions for
reentering the mine;
(2) Specification and locations of offgas monitoring procedures and equipment;
(3) Specifications for construction of
retort bulkheads and seals, and their
locations;
(4) Procedures for ignition of a retort
and for reignition following a shutdown; and
(5) Details of area monitoring and
alarm systems for hazardous gases and
actions to be taken to assure safety of
personnel.
kpayne on VMOFRWIN702 with $$_JOB
[52 FR 24941, July 1, 1987, as amended at 52
FR 41397, Oct. 27, 1987; 60 FR 33723, June 29,
1995]
ILLUMINATION
§ 57.22501 Personal electric lamps (I-A,
I-B, I-C, II-A, II-B, III, IV, V-A, and
V-B mines).
Electric lamps used for personal illumination shall be approved by MSHA
under the requirements of 30 CFR parts
19 or 20, as applicable.
EXPLOSIVES
§ 57.22601 Blasting from the surface (IA mines).
(a) All development, production, and
bench rounds shall be initiated from
the surface after all persons are out of
the mine. Persons shall not enter the
mine until ventilating air has passed
over the blast area and through at
least one atmospheric monitoring sensor.
(b) After blasting, if the monitoring
system indicates that methane in the
mine is less than 1.0 percent, persons
may enter the mine. All places blasted
shall be tested for methane by a competent person before work is started.
(c) If the monitoring system indicates the presence of 1.0 percent or
more methane, persons other than examiners shall not enter the mine until
the mine has been examined by a competent person and the methane content
has been reduced to less than 1.0 percent.
(d) Vehicles used for transportation
when examining the mine shall be approved by MSHA under the applicable
requirements of 30 CFR parts 18
through 36.
[52 FR 24941, July 1, 1987, as amended at 53
FR 9615, Mar. 24, 1988]
EFFECTIVE DATE NOTE: At 53 FR 9615, Mar.
24, 1988, § 57.22601 was stayed until further notice.
§ 57.22602 Blasting from the surface (IC mines).
(a) All blasting shall be initiated
from the surface after all persons are
out of the mine and any connecting
mines.
(b) Persons shall not enter the mine
until a competent person has examined
the blast sites and methane concentrations are less than 0.5 percent.
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Mine Safety and Health Admin., Labor
§ 57.22606
§ 57.22603 Blasting from the surface
(II-A mines).
(a) All development, production, and
bench rounds shall be initiated from
the surface after all persons are out of
the mine. Persons shall not enter the
mine until the mine has been ventilated for at least 15 minutes and the
ventilating air has passed over the
blast area and through at least one atmospheric monitoring sensor.
(b) If the monitoring system indicates that methane in the mine is less
than 0.5 percent, competent persons
may enter the mine to test for methane in all blast areas.
(c) If the monitoring system indicates that methane in the mine is 0.5
percent or more, the mine shall be ventilated and persons shall not enter the
mine until the monitoring system indicates that methane in the mine is less
than 0.5 percent.
(d) If the monitoring system is inoperable or malfunctions, the mine shall
be ventilated for at least 45 minutes
and the mine power shall be deenergized before persons enter the mine.
Only competent persons necessary to
test for methane may enter the mine
until the methane in the mine is less
than 0.5 percent.
(e) Vehicles used for transportation
when examining the mine shall be approved by MSHA under the applicable
requirements of 30 CFR parts 18
through 36. Vehicles shall not be used
to examine the mine if the monitoring
system is inoperable or has malfunctioned.
the blast area and through at least one
atmospheric monitoring sensor.
(b) If the monitoring system indicates that methane in the mine is less
than 1.0 percent, persons may enter the
mine, and all places blasted shall be
tested for methane by a competent person before work is started.
(c) If the monitoring system indicates the presence of 1.0 percent or
more methane, persons other than examiners shall not enter the mine until
the mine has been examined by a competent person and the methane level is
less than 1.0 percent.
(d) Vehicles used for transportation
when examining the mine shall be approved by MSHA under the applicable
requirements of 30 CFR parts 18
through 36.
(e) This standard applies only to
mines blasting within an oil reservoir.
kpayne on VMOFRWIN702 with $$_JOB
§ 57.22604 Blasting from the surface
(II-B mines).
All development, production, and
bench rounds shall be initiated from
the surface after all persons are out of
the mine. Persons other than those
designated by the mine operator to
make methane tests shall not enter the
mine until all blast areas have been
tested for methane.
§ 57.22605 Blasting from the surface
(V-A mines).
(a) All development and production
blasting shall be initiated from the surface after all persons are out of the
mine. Persons shall not enter the mine
until ventilating air has passed over
§ 57.22606 Explosive
materials
blasting units (III mines).
(a) Mine operators shall notify the
appropriate MSHA District Manager of
all nonapproved explosive materials
and blasting units to be used prior to
their use. Explosive materials used for
blasting shall be approved by MSHA
under 30 CFR part 15, or nonapproved
explosive materials shall be evaluated
and determined by the District Manager to be safe for blasting in a potentially gassy environment. The notice
shall also include the millisecond-delay
interval between successive shots and
between the first and last shot in a
round.
(b) Faces shall be examined for proper placement of holes, possible breakthrough, and water. Ammonium nitrate blasting agents shall not be loaded into wet holes.
(c) Multiple-shot blasts shall be initiated with detonators encased in copper-based alloy shells. Aluminum and
aluminum alloy-cased detonators, nonelectric detonators, detonating cord,
and safety fuses shall not be used. All
detonators in a round shall be made by
the same manufacturer.
(d) Nonapproved explosives shall be
used only as primers with ammonium
nitrate-fuel oil blasting agents. Such
primers shall be placed at the back or
bottom of the hole.
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§ 57.22607
30 CFR Ch. I (7–1–19 Edition)
(e) Blast holes shall be stemmed with
a noncombustible material in an
amount to confine the explosive
charge. Breakthrough holes shall be
stemmed at both ends.
(f) Mudcaps or other nonapproved
unconfined shots shall not be blasted.
(g)(1) Blasting units shall be approved by MSHA under 30 CFR part 25;
or
(2) Blasting units used to fire more
than 20 detonators shall provide at
least 2 amperes through each detonator
but not more than an average of 100
amperes through one ohm for 10 milliseconds, and provide the necessary current for at least the first 5 milliseconds
with a cutoff not to exceed 10 milliseconds.
[52 FR 24941, July 1, 1987, as amended at 52
FR 41397, Oct. 27, 1987]
§ 57.22607
Blasting on shift (III mines).
When blasting on shift, tests for
methane shall be made in the mine atmosphere by a competent person before
blasting. Blasting shall not be done
when 1.0 percent or more methane is
present.
§ 57.22608 Secondary blasting (I-A, IIA, and V-A mines).
Prior to secondary blasting, tests for
methane shall be made in the mine atmosphere at blast sites by a competent
person. Secondary blasting shall not be
done when 0.5 percent or more methane
is present.
APPENDIX I TO SUBPART T OF PART 57—
STANDARD APPLICABILITY BY CATEGORY OR SUBCATEGORY
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Subcategory I-A
57.22101
57.22103
57.22201
57.22202
57.22204
57.22205
57.22206
57.22207
57.22208
57.22211
57.22214
57.22215
57.22217
57.22220
57.22221
57.22222
57.22224
57.22227
57.22228
57.22229
57.22234
57.22237
57.22301
57.22302
57.22306
57.22401
57.22501
57.22601
57.22608
Subcategory I-B
57.22201
57.22202
57.22217
57.22222
57.22227
57.22231
57.22232
57.22234
57.22238
57.22401
57.22501
Subcategory I-C
57.22222
57.22225
57.22227
57.22228
57.22233
57.22235
57.22241
57.22303
57.22310
57.22313
57.22501
57.22602
57.22102
57.22104
57.22106
57.22201
57.22202
57.22203
57.22209
57.22210
57.22212
57.22216
57.22217
Subcategory II-A
57.22101
57.22103
57.22201
57.22202
57.22204
57.22205
57.22206
57.22207
57.22208
57.22212
57.22214
57.22215
57.22219
57.22220
57.22221
57.22222
57.22227
57.22228
57.22230
57.22232
57.22235
57.22301
57.22304
57.22307
57.22311
57.22312
57.22501
57.22603
57.22608
Subcategory II-B
57.22201
57.22227
57.22231
57.22232
57.22235
57.22238
57.22501
57.22604
Category III
57.22101
57.22103
57.22201
57.22202
57.22204
57.22205
57.22206
57.22207
57.22208
57.22213
57.22214
57.22215
57.22218
57.22220
57.22221
57.22222
57.22223
57.22224
57.22227
57.22228
57.22229
57.22234
57.22237
57.22305
57.22308
57.22501
57.22606
57.22607
Category IV
57.22105
57.22201
57.22226
57.22227
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Mine Safety and Health Admin., Labor
57.22232
57.22235
57.22239
57.22501
AUTHORITY: 30 U.S.C. 811, 957, 961.
SOURCE: 59 FR 8327, Feb. 18, 1994, unless
otherwise noted.
Subcategory V-A
57.22222
57.22227
57.22228
57.22229
57.22234
57.22240
57.22301
57.22302
57.22309
57.22312
57.22314
57.22315
57.22501
57.22605
57.22608
57.22101
57.22103
57.22201
57.22202
57.22204
57.22205
57.22206
57.22207
57.22208
57.22212
57.22214
57.22215
57.22218
57.22220
57.22221
Subpart A—General
§ 58.1
Subparts B–D [Reserved]
Subpart E—Miscellaneous
§ 58.610
Category VI
57.22236
57.22238
PART 58—HEALTH STANDARDS FOR
METAL AND NONMETAL MINES
[59 FR 8327, Feb. 18, 1994, as amended at 60
FR 30401, June 8, 1995]
Subpart A—General
Sec.
58.1 Scope.
§ 58.620
Drill dust control.
Holes shall be collared and drilled
wet, or other effective dust control
measures shall be used, when drilling
non-water-soluble material. Effective
dust control measures shall be used
when drilling water-soluble materials.
Subparts B–D [Reserved]
Subpart E—Miscellaneous
58.610
58.620
Abrasive blasting.
(a) Surface and underground mines.
When an abrasive blasting operation is
performed, all exposed miners shall use
in accordance with 30 CFR 56.5005 or
57.5005 respirators approved for abrasive blasting by NIOSH under 42 CFR
part 84, or the operation shall be performed in a totally enclosed device
with the miner outside the device.
(b) Underground areas of underground
mines. Silica sand or other materials
containing more than 1 percent free
silica shall not be used as an abrasive
substance in abrasive blasting.
57.22232
57.22234
57.22238
57.22314
57.22501
57.22231
57.22232
Scope.
The health standards in this part
apply to all metal and nonmetal mines.
Subcategory V-B
57.22201
57.22202
57.22218
57.22222
57.22227
57.22231
§ 58.620
Abrasive blasting.
Drill dust control.
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SUBCHAPTER L [RESERVED]
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| File Type | application/pdf |
| File Modified | 2019-09-23 |
| File Created | 2019-09-24 |