1998 CFR Title 39, Volume 1

Title 30--Mineral Resources PART 57--SAFETY AND HEALTH STANDARDS--UNDERGROUND METAL AND NONMETAL MINES
	57.1	Purpose and scope.
	57.2	Definitions.
	57.1000	Notification of commencement of operations and closing of mines.
	57.3000	Definitions.
	57.3200	Correction of Hazardous conditions.
	57.3201	Location for performing scaling.
	57.3202	Scaling tools.
	57.3203	Rock fixtures.
	57.3360	Ground support use.
	57.3400	Secondary breakage.
	57.3401	Examination of ground conditions.
	57.3430	Activity between machinery or equipment and the highwall or bank.
	57.3460	Maintenance between machinery or equipment and ribs.
	57.3461	Rock bursts.
	57.4000	Definitions.
	57.4011	Abandoned electric circuits.
	57.4057	Underground trailing cables.
	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.
	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.
	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.
	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.
	57.4463	Liquefied petroleum gas use underground.
	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.
	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.
	57.4760	Shaft mines.
	57.4761	Underground shops.
	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.
	57.5015	Oxygen deficiency.
	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.
	57.5050	Exposure limits for noise.
	57.6000	Definitions.
	57.6100	Separation of stored explosive material.
	57.6101	Areas around explosive material storage facilities.
	57.6102	Explosive material storage practices.
	57.6130	Explosive material storage facilities.
	57.6131	Location of explosive material storage facilities.
	57.6132	Magazine requirements.
	57.6133	Powder chests.
	57.6160	Main facilities.
	57.6161	Auxiliary facilities.
	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.
	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.
	57.6400	Compatibility of electric detonators.
	57.6401	Shunting.
	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.
	57.6500	Damaged initiating material.
	57.6501	Nonelectric initiation systems.
	57.6502	Safety fuse.
	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.
	57.6700	Nonsparking tools.
	57.6701	Tamping and loading pole requirements.
	57.6800	Storage facilities.
	57.6801	Vehicle repair.
	57.6802	Bulk delivery vehicles.
	57.6803	Blasting lines.
	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.
	57.6960	Mixing of explosive material.
	57.7002	Equipment defects.
	57.7003	Drill area inspection.
	57.7004	Drill mast.
	57.7005	Augers and drill stems.
	57.7008	Moving the drill.
	57.7009	Drill helpers.
	57.7010	Power failures.
	57.7011	Straightening crossed cables.
	57.7012	Tending drills in operation.
	57.7013	Covering or guarding drill holes.
	57.7018	Hand clearance.
	57.7028	Hand clearance.
	57.7032	Anchoring.
	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.
	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.
	57.8518	Main and booster fans.
	57.8519	Underground main fan controls.
	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.
	57.9000	Definitions.
	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.
	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.
	57.9261	Transporting tools and materials on locomotives.
	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.
	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.
	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.
	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.
	57.11025	Railed landings, backguards, and other protection for fixed ladders.
	57.11026	Protection for inclined fixed ladders.
	57.11027	Scaffolds and working platforms.
	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.
	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.
	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.
	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.
	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.
	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.
	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.
	57.13021	High-pressure hose connections.
	57.13030	Boilers.
	57.14000	Definitions.
	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 backup alarms for surface equipment.
	57.14160	Mantrip trolley wire hazards underground.
	57.14161	Makeshift couplings.
	57.14162	Trip lights.
	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.
	57.14214	Train warnings.
	57.14215	Coupling or uncoupling cars.
	57.14216	Backpoling.
	57.14217	Securing parked railcars.
	57.14218	Movement of equipment on adjacent tracks.
	57.14219	Brakeman signals.
	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.
	57.15020	Life jackets and belts.
	57.15030	Provision and maintenance of self-rescue devices.
	57.15031	Location of self-rescue devices.
	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.
	57.17001	Illumination of surface working areas.
	57.17010	Electric lamps.
	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.
	57.18020	Working alone.
	57.18025	Working alone.
	57.18028	Mine emergency and self-rescuer training.
	57.19000	Application.
	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.
	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.
	57.19035	Headframe design.
	57.19036	Headframe height.
	57.19037	Fleet angles.
	57.19038	Platforms around elevated head sheaves.
	57.19045	Metal bonnets.
	57.19049	Hoisting persons in buckets.
	57.19050	Bucket requirements.
	57.19054	Rope guides.
	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.
	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.
	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.
	57.19109	Shaft inspection and repair.
	57.19110	Overhead protection for shaft deepening work.
	57.19111	Shaft-sinking ladders.
	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.
	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.
	57.20012	Labeling of toxic materials.
	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.
	57.22001	Scope.
	57.22002	Definitions.
	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.
	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 (I-C mines).
	57.22201	Mechanical ventilation (I-A, I-B, I-C, 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, V-A, 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 V-A 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 I-C 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, II-A, 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 (I-B, 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).
	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).
	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).
	57.22401	Underground retorts (I-A and I-B mines).
	57.22501	Personal electric lamps (I-A, I-B, I-C, II-A, II-B, III, IV, V-A, and V-B mines).
	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).