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Electronic Code of Federal Regulations

e-CFR data is current as of March 27, 2020

Title 30Chapter ISubchapter OPart 75

TITLE 30—Mineral Resources








Certified person.
Tests for methane and for oxygen deficiency; qualified person.
Tests for methane; qualified person; additional requirement.
Tests of air flow; qualified person.
Electrical work; qualified person.
Repair of energized surface high voltage lines; qualified person.
Qualified hoisting engineer; qualifications.
AMS operator, qualifications.
Records of certified and qualified persons.
Training programs.

[Statutory Provision]

Plans for training programs.


Protection from falls of roof, face and ribs.
Mining methods.
Roof bolting.
Installation of roof support using mining machines with integral roof bolters.
Conventional roof support.
Pillar recovery.
Warning devices.
Automated Temporary Roof Support (ATRS) systems.
Manual installation of temporary support.
Roof testing and scaling.
Rehabilitation of areas with unsupported roof.
Roof support removal.
Supplemental support materials, equipment and tools.
Longwall mining systems.
Roof control plan.
Roof control plan information.
Roof control plan-approval criteria.
Evaluation and revision of roof control plan.


Main mine fans.
Installation of main mine fans.
Main mine fan operation.
Main mine fan examinations and records.
Main mine fan stoppage with persons underground.
Air quality detectors and measurement devices.
Air quality.
Harmful quantities of noxious gases.
Actions for excessive methane.
Intentional changes in the ventilation system.
Air quantity.
Mean entry air velocity.
Air courses and trolley haulage systems.
Face ventilation control devices.
Auxiliary fans and tubing.
Working sections and working places.
Ventilation controls.
Worked-out areas and areas where pillars are being recovered.
Seal strengths, design applications, and installation.
Sampling and monitoring requirements.
Construction and repair of seals.
Seals records.
Underground electrical installations.
Direct-fired intake air heaters.
Methane monitors.
Underground shops.
Belt air course ventilation.
Atmospheric monitoring systems.
Actions in response to AMS malfunction, alert, or alarm signals.
Preshift examination at fixed intervals.
Supplemental examination.
On-shift examination.
Hazardous conditions and violations of mandatory health or safety standards; posting, correcting, and recording.
Weekly examination.
Mine ventilation plan; submission and approval.
Mine ventilation plan; contents.
Mine ventilation map.
Reopening mines.
Escapeways; bituminous and lignite mines.
Escapeways; anthracite mines.
Mechanical escape facilities.
Longwall and shortwall travelways.
Opening new mines.
Final mining of pillars.
Boreholes in advance of mining.
Mining into inaccessible areas.


Accumulation of combustible materials.
Cleanup program.
Abatement of dust; water or water with a wetting agent.
Excessive amounts of dust.
Rock dusting.
Maintenance of incombustible content of rock dust.
Incombustible content.
Exemption of anthracite mines.


Permissible electric equipment.
Other low horsepower electric face equipment.
Permissible electric face equipment; coal seams above water table.
Coal seams above the water table.
Permissible electric face equipment.
New openings; mines above water table and never classed gassy.
Permits for noncompliance.
Permissible electric face equipment; maintenance.
Statement listing all electric face equipment.
Permissibility of new, replacement, used, reconditioned, additional, and rebuilt electric face equipment.
Mines classed gassy; use and maintenance of permissible electric face equipment.
Electric face equipment; requirements for permissibility.
Electric face equipment; permissible condition; maintenance requirements.
Power connection points.
Electric equipment other than power-connection points; outby the last open crosscut; return air; permissibility requirements.
Map of electrical system.
Mine tracks.
Changes in electric system map; recording.
Electric power circuit and electric equipment; deenergization.
Energized trolley wires; repair.
Repair of energized trolley wires; training.
Low-, medium-, or high-voltage distribution circuits and equipment; repair.
Qualified person.
Electric equipment; examination, testing and maintenance.
Qualified person.
Frequency of examinations.
Electric conductor; capacity and insulation.
Electric conductor; size.
Electrical connections or splices; suitability.
Cable fittings; suitability.
Power wires; support.
Installed insulators.
Communication wires and cables; installation; insulation; support.
Power wires and cables; insulation and protection.
Power wires and cables; insulation and protection.
Plans for insulation of existing bare power wires and cables.
Electric equipment and circuits; overload and short circuit protection.
Electric equipment and circuits; overload and short circuit protection; minimum requirements.
Incandescent lamps, overload and short circuit protection.
Main power circuits; disconnecting switches.
Main power circuits; disconnecting switches; locations.
Electric equipment; switches.
Lightning arresters; ungrounded and exposed power conductors and telephone wires.
Lighting devices.
Incandescent and fluorescent lamps.
Electric face equipment; deenergization.
Deenergization of self-propelled electric face equipment installation requirements.
Deenergization of self-propelled electric face equipment; performance requirements.
Automatic emergency-parking brakes.
Electric face equipment; electric equipment used in return air outby the last open crosscut; maximum level of alternating or direct electric current between frames of equipment.
Appendix A to Subpart F of Part 75—List of Permissible Electric Face Equipment Approved by the Bureau of Mines Prior to May 23, 1936


Trailing cables; flame resistance.
Approved cables; flame resistance.
Short circuit protection of trailing cables.
Short circuit protection; ratings and settings of circuit breakers.
Short circuit protection; use of fuses; approval by the Secretary.
Short circuit protection; dual element fuses; current ratings; maximum values.
Trailing cable junctions.
Temporary splice of trailing cable.
Permanent splicing of trailing cables.
Clamping of trailing cables to equipment.
Protection of trailing cables.
Breaking trailing cable and power cable connections.


Grounding metallic sheaths, armors, and conduits enclosing power conductors.
Approved methods of grounding.
Grounding metallic frames, casings, and other enclosures of electric equipment.
Approved methods of grounding of equipment receiving power from ungrounded alternating current power systems.
Approved method of grounding metallic frames, casings and other enclosures receiving power from single-phase 110-220-volt circuit.
Approved methods of grounding metallic frames, casings and other enclosures of electric equipment receiving power from direct current power systems with one polarity grounded.
Grounding wires; capacity of wires.
Use of grounding connectors.
Protection other than grounding.
Protection other than grounding; approved by an authorized representative of the Secretary.
Grounding offtrack direct-current machines and the enclosures of related detached components.
Approved method of grounding.
Approved grounding mediums.
Approved methods of grounding offtrack mobile, portable and stationary direct-current machines.
Other methods of protecting offtrack direct-current equipment; approved by an authorized representative of the Secretary.
Grounding frames of stationary high-voltage equipment receiving power from ungrounded delta systems.
Approved methods of grounding.
Work on high-voltage lines; deenergizing and grounding.
Work on high-voltage lines.
Repairs to energized surface high-voltage lines.
Work on energized high-voltage surface lines; reporting.
Simultaneous repairs.
Installation of protective equipment.
Protective clothing; use and inspection.
Protective equipment; inspection.
Protective equipment; testing and storage.
Operating disconnecting or cutout switches.
Tying into energized high-voltage surface circuits.
Use of grounded messenger wires; ungrounded systems.
Deenergized underground power circuits; idle days—idle shifts.


High-voltage circuits; circuit breakers.
Circuit breakers; location.
Approved circuit schemes.
Testing, examination and maintenance of circuit breakers; procedures.
Testing, examination, and maintenance of circuit breakers; record.
Grounding resistors.
Protection of high-voltage circuits extending underground.
Fail safe ground check circuits on high-voltage resistance grounded systems.
Maximum voltage ground check circuits.
Ground check systems not employing pilot check wires; approval by the Secretary.
Underground high-voltage cables.
Connection of single-phase loads.
Installation of high-voltage transmission cables.
Disconnecting devices.
Identification of circuit breakers and disconnecting switches.
High-voltage trailing cables; splices.
High-voltage underground equipment; grounding.
Movement of high-voltage power centers and portable transformers; permit.
Qualified person.
High-voltage power centers and transformers; record of examination.

High-Voltage Longwalls

High-voltage longwalls; scope.
Electrical protection.
Disconnect devices.
Guarding of cables.
Cable handling and support systems.
Use of insulated cable handling equipment.
Motor-starter enclosures; barriers and interlocks.
Electrical work; troubleshooting and testing.
Testing, examination and maintenance.
Underground high-voltage longwall cables.
Electrical protection.
Power centers.
High-voltage trailing cables.
Guarding of trailing cables.
Trailing cable pulling.
Tramming continuous mining machines in and out of the mine and from section to section.
Splicing and repair of trailing cables.
Electrical work; troubleshooting and testing.
Frequency of examinations; recordkeeping.
Handling high-voltage trailing cables.
Appendix A to Subpart I of Part 75—Diagrams of Inby and Outby Switching


Low- and medium-voltage circuits serving three-phase alternating current equipment; circuit breakers.
Circuit breakers; location.
Approved circuit schemes.
Testing, examination, and maintenance of circuit breakers; procedures.
Testing, examination, and maintenance of circuit breakers; record.
Protection of low- and medium-voltage three-phase circuits used underground.
Low- and medium-voltage ground check monitor circuits.
Maximum voltage ground check circuits.
Approved ground check systems not employing pilot check wires.
Attachment of ground conductors and ground check wires to equipment frames; use of separate connections.
Disconnecting devices.
Identification of circuit breakers.
Connection of single-phase loads.
Trailing cables for mobile equipment, ground wires, and ground check wires.
Design of trailing cables for medium-voltage circuits.
Appendix A to Subpart J of Part 75


Cutout switches.
Overcurrent protection.
Devices for overcurrent protection; testing and calibration requirements; records.
Installation of electric equipment and conductors; permissibility.
Insulation of trolley wires, trolley feeder wires and bare signal wires; guarding of trolley wires and trolley feeder wires.
Other requirements for guarding of trolley wires and trolley feeder wires.
Requirements for movement of off-track mining equipment in areas of active workings where energized trolley wires or trolley feeder wires are present; pre-movement requirements; certified and qualified persons.


Type and quality of firefighting equipment.
Quantity and location of firefighting equipment.
Condition and examination of firefighting equipment.
Deluge-type water sprays, foam generators; main and secondary belt-conveyor drives.
Deluge-type water spray systems.
Installation of deluge-type sprays.
Water requirements.
Branch lines.
Installation of foam generator systems.
Water sprinkler systems; general.
Installation of water sprinkler systems; requirements.
Water sprinkler systems; arrangement of sprinklers.
Back-up water system.
Water sprinkler systems; fire warning devices at belt drives.
Inspection of water sprinkler systems.
Equivalent dry-pipe system.
Dry powder chemical systems; general.
Installation of dry powder chemical systems.
Construction of dry powder chemical systems.
Dry powder chemical systems; sensing and fire-suppression devices.
Sealing of dry powder chemical systems.
Dry powder requirements.
Nozzles; flow rate and direction.
Safeguards for dry powder chemical systems.
Back-up water system.
Inspection of dry powder chemical systems.
Slippage and sequence switches.
Automatic fire warning devices.
Automatic fire sensors.
Automatic fire sensors; approved components; installation requirements.
Automatic fire sensor and warning device systems; minimum requirements; general.
Automatic fire sensor and warning device systems; installation; minimum requirements.
Automatic fire warning devices; actions and response.
Automatic fire sensors; actuation of fire suppression systems.
Electrical components; permissibility requirements.
Automatic fire sensor and warning device systems; examination and test requirements.
Minimum requirements; fire suppression materials and location; maintenance of entries and crosscuts; access doors; communications; fire crews; high-expansion foam devices.
Fire suppression systems; additional requirements.
Tests of fire hydrants and fire hose; record of tests.
Underground storage, lubricating oil and grease.
Welding, cutting, or soldering with arc or flame underground.
Test for methane.
Transportation of liquefied and nonliquefied compressed gas cylinders; requirements.
Storage of liquefied and nonliquefied compressed gas cylinders; requirements.
Use of liquefied and nonliquefied compressed gas cylinders; general requirements.
Maintenance and tests of liquefied and nonliquefied compressed gas cylinders; accessories and equipment; requirements.
Exemption of small low pressure gas cylinders containing nonflammable or nonexplosive gas mixtures.

Fire Suppression Devices and Fire-Resistant Hydraulic Fluids on Underground Equipment

Fire suppression devices.
Fire-resistant hydraulic fluids and fire suppression devices on underground equipment.
Approved fire-resistant hydraulic fluids; minimum requirements.
Fire suppression devices; approved components; installation requirements.
Automatic fire sensors and manual actuators; installation; minimum requirements.
Electrical components of fire suppression devices; permissibility requirements.
Capacity of fire suppression devices; location and direction of nozzles.
Water spray devices; capacity; water supply; minimum requirements.
Fire suppression devices; extinguishant supply systems.
Dry chemical devices; capacity; minimum requirements.
High expansion foam devices; minimum capacity.
Extinguishing agents; requirements on mining equipment employed in low coal.
Inerting of mine atmosphere prohibited.
Approval of other fire suppression devices.
Guards and handrails; requirements where fire suppression devices are employed.
Fire suppression devices; hazards; training of miners.
Inspection of fire suppression devices.
Incorporation by reference; availability of publications.
Approved conveyor belts.

Subpart M—MAPS

Mine map.
Additional information on mine map.
Accuracy and scale of mine maps.
Temporary notations, revisions, and supplements.
Temporary notations, revisions, and supplements.
Availability of mine map.
Mine closure; filing of map with Secretary.
Places to give notice and file maps.


Qualified person.
Explosives and blasting equipment.
Transporting explosives and detonators.
Explosives and detonators in underground magazines.
Explosives and detonators outside of magazines.
Sheathed explosive units.
Boreholes for explosives.
Preparation before blasting.
Primer cartridges.
Loading boreholes.
Weight of explosives permitted in boreholes in bituminous and lignite mines.
Multiple-shot blasting.
Permits for firing more than 20 boreholes and for use of nonpermissible blasting units.
Stemming boreholes.
Blasting circuits.
Methane concentration and tests.
Firing procedures.
Examination after blasting.
Damaged or deteriorated explosives and detonators.


Hoisting equipment; general.
Hoists; brakes, capability.
Hoists; tests of safety catches; records.
Daily examination of hoisting equipment.
Certifications and records of daily examinations.
Hoists; rated capacities; indicators.
Hoists; indicators.
Communication between shaft stations and hoist room.
Communication between shaft stations and hoist room.
Tests of signaling systems.
Other safeguards.
General criteria.
Criteria—Hoists transporting materials; brakes.
Criteria—Drum clutch; cage construction.
Criteria—Automatic elevators.
Criteria—Belt conveyors.
Criteria—Self-propelled personnel carriers.
Criteria—Track haulage roads.
Criteria—Shelter holes.
Criteria—Haulage; general.
Criteria—Entrances to shafts and slopes.
Automatic brakes; speed reduction gear.
Braking system.
Automatic couplers.
Automatic couplers, haulage equipment.

Wire Ropes

Guide ropes.
Wire ropes; scope.
Minimum rope strength.
Initial measurement.
Retirement criteria.
Load end attachments.
Drum end attachment.
End attachment retermination.
End attachment replacement.


Emergency evacuations.
Mine emergency evacuation and firefighting program of instruction.
Use of fire suppression equipment.
Mine emergency evacuation training and drills.
Escapeway maps.
Refuge alternatives.
Emergency Response Plan; refuge alternatives.
Training and records for examination, maintenance and repair of refuge alternatives and components.


Communication facilities; main portals; installation requirements.
Communication facilities; working sections; installation and maintenance requirements; audible or visual alarms.
Communications facilities; refuge alternatives.


Oil and gas wells.
Smoking; prohibition.
Smoking programs.
Portable electric lamps.
Permissible lamps.
New working section.
Surface structures, fireproofing.
Surface structures; fireproof construction.
Accumulations of methane and coal dust on surface coal-handling facilities.
Canopies or cabs; diesel-powered and electric face equipment.
Canopies or cabs; self-propelled diesel-powered and electric face equipment; installation requirements.
Sealing of mines.
Sealing of shaft openings.
Sealing of slope or drift openings.
Openings of active mines.
Bath houses and toilet facilities.
Availability of surface bathing facilities; change rooms; and sanitary facilities.
Location of surface facilities.
Minimum requirements of surface bathing facilities, change rooms, and sanitary toilet facilities.
Waiver of surface facilities requirements.
Application for waiver of surface facilities.
Underground sanitary facilities; installation and maintenance.
Underground sanitary facilities; waiver of requirements.
Application for waiver of location requirements for underground sanitary facilities.
Issuance of waivers.
Underground sanitary facilities; maintenance.
Emergency medical assistance; first-aid.
Arrangements for emergency medical assistance and transportation for injured persons; agreements; reporting requirements; posting requirements.
Emergency communications; requirements.
First-Aid training; supervisory employees.
First-aid training program; availability of instruction to all miners.
First-aid training program; retraining of supervisory employees; availability to all miners.
First-aid training program; minimum requirements.
First-aid equipment; location; minimum requirements.
Availability of approved self-rescue devices; instruction in use and location.
Approved self-rescue devices.
Self-rescue devices; use and location requirements.
Self-rescue devices; inspection, testing, maintenance, repair, and recordkeeping.
Additional self-contained self-rescuers (SCSRs).
Map locations of self-contained self-rescuers (SCSR).
Emergency tethers.
Multi-gas detectors.
Reporting SCSR inventory and malfunctions; retention of SCSRs.
Identification check system.
Operations under water.
Operations under water; notification by operator.
Permit required.
Applications for permits.
Issuance of permits.
Drinking water.
Drinking water; quality.
Illumination; purpose and scope of §§75.1719 through 75.1719-4; time for compliance.
Illumination in working places.
Lighting fixtures; requirements.
Methods of measurement; light measuring instruments.
Mining machines, cap lamps; requirements.
Protective clothing; requirements.
Distinctively colored hard hats, or hard caps; identification for newly employed, inexperienced miners.
Opening of new underground coal mines, or reopening and reactivating of abandoned or deactivated coal mines, notification by the operator; requirements.
Mechanical equipment guards.
Stationary grinding machines; protective devices.
Hand-held power tools; safety devices.
Machinery and equipment; operation and maintenance.
Performing work from a raised position; safeguards.
Drive belts.
Power-driven pulleys.
Welding operations.
Compressed air; general; compressed air systems.
Maintenance of belt conveyors and belt conveyor entries.
Proximity detection systems.

Subpart S—[RESERVED]



Diesel fuel requirements.
Underground diesel fuel storage—general requirements.
Underground diesel fuel storage facilities and areas; construction and safety precautions.
Underground diesel fuel tanks and safety cans.
Dispensing of diesel fuel.
Diesel fuel piping systems.
Transport of diesel fuel.
Diesel-powered equipment intended for use in underground coal mines.
Nonpermissible diesel-powered equipment; categories.
Nonpermissible diesel-powered equipment; design and performance requirements.
Nonpermissible diesel-powered equipment; electrical system design and performance requirements.
Fire suppression systems for diesel-powered equipment and fuel transportation units.
Fire suppression systems for permanent underground diesel fuel storage facilities.
Starting aids.
Maintenance of diesel-powered equipment.
Training and qualification of persons working on diesel-powered equipment.
Operation of diesel-powered equipment.

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