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Title 30--Mineral Resources
CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
PART 75--MANDATORY SAFETY STANDARDS--UNDERGROUND COAL MINES
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 | 75.1 | Scope. |
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| 75.2 | Definitions. |
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| 75.100 | Certified person. |
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| 75.150 | Tests for methane and for oxygen deficiency; qualified person. |
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| 75.151 | Tests for methane; qualified person; additional requirement. |
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| 75.152 | Tests of air flow; qualified person. |
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| 75.153 | Electrical work; qualified person. |
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| 75.154 | Repair of energized surface high voltage lines; qualified person. |
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| 75.155 | Qualified hoisting engineer; qualifications. |
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| 75.159 | Records of certified and qualified persons. |
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| 75.160 | Training programs. |
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| 75.161 | Plans for training programs. |
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| 75.200 | Scope. |
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| 75.201 | Definitions. |
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| 75.202 | Protection from falls of roof, face and ribs. |
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| 75.203 | Mining methods. |
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| 75.204 | Roof bolting. |
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| 75.205 | Installation of roof support using mining machines with integral roof bolters. |
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| 75.206 | Conventional roof support. |
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| 75.207 | Pillar recovery. |
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| 75.208 | Warning devices. |
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| 75.209 | Automated Temporary Roof Support (ATRS) systems. |
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| 75.210 | Manual installation of temporary support. |
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| 75.211 | Roof testing and scaling. |
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| 75.212 | Rehabilitation of areas with unsupported roof. |
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| 75.213 | Roof support removal. |
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| 75.214 | Supplemental support materials, equipment and tools. |
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| 75.215 | Longwall mining systems. |
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| 75.220 | Roof control plan. |
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| 75.221 | Roof control plan information. |
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| 75.222 | Roof control plan-approval criteria. |
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| 75.223 | Evaluation and revision of roof control plan. |
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| 75.300 | Scope. |
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| 75.301 | Definitions. |
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| 75.302 | Main mine fans. |
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| 75.310 | Installation of main mine fans. |
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| 75.311 | Main mine fan operation. |
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| 75.312 | Main mine fan examinations and records. |
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| 75.313 | Main mine fan stoppage with persons underground. |
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| 75.320 | Air quality detectors and measurement devices. |
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| 75.321 | Air quality. |
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| 75.322 | Harmful quantities of noxious gases. |
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| 75.323 | Actions for excessive methane. |
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| 75.324 | Intentional changes in the ventilation system. |
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| 75.325 | Air quantity. |
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| 75.326 | Mean entry air velocity. |
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| 75.327 | Air courses and trolley haulage systems. |
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| 75.330 | Face ventilation control devices. |
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| 75.331 | Auxiliary fans and tubing. |
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| 75.332 | Working sections and working places. |
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| 75.333 | Ventilation controls. |
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| 75.334 | Worked-out areas and areas where pillars are being recovered. |
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| 75.335 | Construction of seals. |
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| 75.340 | Underground electrical installations. |
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| 75.341 | Direct-fired intake air heaters. |
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| 75.342 | Methane monitors. |
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| 75.343 | Underground shops. |
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| 75.344 | Compressors. |
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| 75.350 | Air courses and belt haulage entries. |
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| 75.351 | Atmospheric monitoring system (AMS). |
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| 75.352 | Return air courses. |
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| 75.360 | Preshift examination at fixed intervals. |
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| 75.361 | Supplemental examination. |
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| 75.362 | On-shift examination. |
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| 75.363 | Hazardous conditions; posting, correcting and recording. |
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| 75.364 | Weekly examination. |
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| 75.370 | Mine ventilation plan; submission and approval. |
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| 75.371 | Mine ventilation plan; contents. |
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| 75.372 | Mine ventilation map. |
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| 75.373 | Reopening mines. |
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| 75.380 | Escapeways; bituminous and lignite mines. |
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| 75.381 | Escapeways; anthracite mines. |
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| 75.382 | Mechanical escape facilities. |
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| 75.383 | Escapeway maps and drills. |
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| 75.384 | Longwall and shortwall travelways. |
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| 75.385 | Opening new mines. |
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| 75.386 | Final mining of pillars. |
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| 75.388 | Boreholes in advance of mining. |
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| 75.389 | Mining into inaccessible areas. |
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| 75.400 | Accumulation of combustible materials. |
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| 75.400-1 | Definitions. |
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| 75.400-2 | Cleanup program. |
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| 75.401 | Abatement of dust; water or water with a wetting agent. |
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| 75.401-1 | Excessive amounts of dust. |
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| 75.402 | Rock dusting. |
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| 75.402-1 | Definition. |
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| 75.402-2 | Exceptions. |
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| 75.403 | Maintenance of incombustible content of rock dust. |
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| 75.403-1 | Incombustible content. |
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| 75.404 | Exemption of anthracite mines. |
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| 75.500 | Permissible electric equipment. |
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| 75.500-1 | Other low horsepower electric face equipment. |
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| 75.501 | Permissible electric face equipment; coal seams above water table. |
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| 75.501-1 | Coal seams above the water table. |
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| 75.501-2 | Permissible electric face equipment. |
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| 75.501-3 | New openings; mines above water table and never classed gassy. |
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| 75.502 | Permits for noncompliance. |
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| 75.503 | Permissible electric face equipment; maintenance. |
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| 75.503-1 | Statement listing all electric face equipment. |
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| 75.504 | Permissibility of new, replacement, used, reconditioned, additional, and rebuilt electric face equipment. |
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| 75.505 | Mines classed gassy; use and maintenance of permissible electric face equipment. |
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| 75.506 | Electric face equipment; requirements for permissibility. |
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| 75.506-1 | Electric face equipment; permissible condition; maintenance requirements. |
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| 75.507 | Power connection points. |
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| 75.507-1 | Electric equipment other than power-connection points; outby the last open crosscut; return air; permissibility requirements. |
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| 75.508 | Map of electrical system. |
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| 75.508-1 | Mine tracks. |
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| 75.508-2 | Changes in electric system map; recording. |
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| 75.509 | Electric power circuit and electric equipment; deenergization. |
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| 75.510 | Energized trolley wires; repair. |
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| 75.510-1 | Repair of energized trolley wires; training. |
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| 75.511 | Low-, medium-, or high-voltage distribution circuits and equipment; repair. |
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| 75.511-1 | Qualified person. |
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| 75.512 | Electric equipment; examination, testing and maintenance. |
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| 75.512-1 | Qualified person. |
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| 75.512-2 | Frequency of examinations. |
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| 75.513 | Electric conductor; capacity and insulation. |
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| 75.513-1 | Electric conductor; size. |
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| 75.514 | Electrical connections or splices; suitability. |
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| 75.515 | Cable fittings; suitability. |
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| 75.516 | Power wires; support. |
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| 75.516-1 | Installed insulators. |
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| 75.516-2 | Communication wires and cables; installation; insulation; support. |
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| 75.517 | Power wires and cables; insulation and protection. |
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| 75.517-1 | Power wires and cables; insulation and protection. |
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| 75.517-2 | Plans for insulation of existing bare power wires and cables. |
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| 75.518 | Electric equipment and circuits; overload and short circuit protection. |
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| 75.518-1 | Electric equipment and circuits; overload and short circuit protection; minimum requirements. |
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| 75.518-2 | Incandescent lamps, overload and short circuit protection. |
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| 75.519 | Main power circuits; disconnecting switches. |
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| 75.519-1 | Main power circuits; disconnecting switches; locations. |
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| 75.520 | Electric equipment; switches. |
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| 75.521 | Lightning arresters; ungrounded and exposed power conductors and telephone wires. |
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| 75.522 | Lighting devices. |
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| 75.522-1 | Incandescent and fluorescent lamps. |
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| 75.523 | Electric face equipment; deenergization. |
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| 75.523-1 | Deenergization of self-propelled electric face equipment installation requirements. |
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| 75.523-2 | Deenergization of self-propelled electric face equipment; performance requirements. |
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| 75.523-3 | Automatic emergency-parking brakes. |
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| 75.524 | 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. |
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| 75.600 | Trailing cables; flame resistance. |
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| 75.600-1 | Approved cables; flame resistance. |
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| 75.601 | Short circuit protection of trailing cables. |
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| 75.601-1 | Short circuit protection; ratings and settings of circuit breakers. |
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| 75.601-2 | Short circuit protection; use of fuses; approval by the Secretary. |
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| 75.601-3 | Short circuit protection; dual element fuses; current ratings; maximum values. |
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| 75.602 | Trailing cable junctions. |
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| 75.603 | Temporary splice of trailing cable. |
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| 75.604 | Permanent splicing of trailing cables. |
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| 75.605 | Clamping of trailing cables to equipment. |
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| 75.606 | Protection of trailing cables. |
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| 75.607 | Breaking trailing cable and power cable connections. |
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| 75.700 | Grounding metallic sheaths, armors, and conduits enclosing power conductors. |
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| 75.700-1 | Approved methods of grounding. |
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| 75.701 | Grounding metallic frames, casings, and other enclosures of electric equipment. |
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| 75.701-1 | Approved methods of grounding of equipment receiving power from ungrounded alternating current power systems. |
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| 75.701-2 | Approved method of grounding metallic frames, casings and other enclosures receiving power from single-phase 110-220-volt circuit. |
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| 75.701-3 | Approved methods of grounding metallic frames, casings and other enclosures of electric equipment receiving power from direct current power systems with one polarity grounded. |
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| 75.701-4 | Grounding wires; capacity of wires. |
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| 75.701-5 | Use of grounding connectors. |
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| 75.702 | Protection other than grounding. |
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| 75.702-1 | Protection other than grounding; approved by an authorized representative of the Secretary. |
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| 75.703 | Grounding offtrack direct-current machines and the enclosures of related detached components. |
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| 75.703-1 | Approved method of grounding. |
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| 75.703-2 | Approved grounding mediums. |
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| 75.703-3 | Approved methods of grounding offtrack mobile, portable and stationary direct-current machines. |
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| 75.703-4 | Other methods of protecting offtrack direct-current equipment; approved by an authorized representative of the Secretary. |
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| 75.704 | Grounding frames of stationary high-voltage equipment receiving power from ungrounded delta systems. |
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| 75.704-1 | Approved methods of grounding. |
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| 75.705 | Work on high-voltage lines; deenergizing and grounding. |
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| 75.705-1 | Work on high-voltage lines. |
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| 75.705-2 | Repairs to energized surface high-voltage lines. |
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| 75.705-3 | Work on energized high-voltage surface lines; reporting. |
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| 75.705-4 | Simultaneous repairs. |
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| 75.705-5 | Installation of protective equipment. |
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| 75.705-6 | Protective clothing; use and inspection. |
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| 75.705-7 | Protective equipment; inspection. |
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| 75.705-8 | Protective equipment; testing and storage. |
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| 75.705-9 | Operating disconnecting or cutout switches. |
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| 75.705-10 | Tying into energized high-voltage surface circuits. |
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| 75.705-11 | Use of grounded messenger wires; ungrounded systems. |
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| 75.706 | Deenergized underground power circuits; idle days--idle shifts. |
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| 75.800 | High-voltage circuits; circuit breakers. |
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| 75.800-1 | Circuit breakers; location. |
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| 75.800-2 | Approved circuit schemes. |
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| 75.800-3 | Testing, examination and maintenance of circuit breakers; procedures. |
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| 75.800-4 | Testing, examination, and maintenance of circuit breakers; record. |
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| 75.801 | Grounding resistors. |
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| 75.802 | Protection of high-voltage circuits extending underground. |
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| 75.803 | Fail safe ground check circuits on high-voltage resistance grounded systems. |
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| 75.803-1 | Maximum voltage ground check circuits. |
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| 75.803-2 | Ground check systems not employing pilot check wires; approval by the Secretary. |
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| 75.804 | Underground high-voltage cables. |
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| 75.805 | Couplers. |
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| 75.806 | Connection of single-phase loads. |
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| 75.807 | Installation of high-voltage transmission cables. |
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| 75.808 | Disconnecting devices. |
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| 75.809 | Identification of circuit breakers and disconnecting switches. |
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| 75.810 | High-voltage trailing cables; splices. |
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| 75.811 | High-voltage underground equipment; grounding. |
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| 75.812 | Movement of high-voltage power centers and portable transformers; permit. |
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| 75.812-1 | Qualified person. |
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| 75.812-2 | High-voltage power centers and transformers; record of examination. |
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| 75.813 | High-voltage longwalls; scope. |
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| 75.814 | Electrical protection. |
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| 75.815 | Disconnect devices. |
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| 75.816 | Guarding of cables. |
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| 75.817 | Cable handling and support systems. |
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| 75.818 | Use of insulated cable handling equipment. |
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| 75.819 | Motor-starter enclosures; barriers and interlocks. |
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| 75.820 | Electrical work; troubleshooting and testing. |
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| 75.821 | Testing, examination and maintenance. |
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| 75.822 | Underground high-voltage longwall cables. |
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| 75.900 | Low- and medium-voltage circuits serving three-phase alternating current equipment; circuit breakers. |
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| 75.900-1 | Circuit breakers; location. |
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| 75.900-2 | Approved circuit schemes. |
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| 75.900-3 | Testing, examination, and maintenance of circuit breakers; procedures. |
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| 75.900-4 | Testing, examination, and maintenance of circuit breakers; record. |
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| 75.901 | Protection of low- and medium-voltage three-phase circuits used underground. |
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| 75.902 | Low- and medium-voltage ground check monitor circuits. |
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| 75.902-1 | Maximum voltage ground check circuits. |
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| 75.902-2 | Approved ground check systems not employing pilot check wires. |
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| 75.902-4 | Attachment of ground conductors and ground check wires to equipment frames; use of separate connections. |
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| 75.903 | Disconnecting devices. |
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| 75.904 | Identification of circuit breakers. |
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| 75.905 | Connection of single-phase loads. |
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| 75.906 | Trailing cables for mobile equipment, ground wires, and ground check wires. |
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| 75.907 | Design of trailing cables for medium-voltage circuits. |
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| 75.1000 | Cutout switches. |
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| 75.1001 | Overcurrent protection. |
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| 75.1001-1 | Devices for overcurrent protection; testing and calibration requirements; records. |
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| 75.1002 | Installation of electric equipment and conductors; permissibility. |
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| 75.1003 | Insulation of trolley wires, trolley feeder wires and bare signal wires; guarding of trolley wires and trolley feeder wires. |
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| 75.1003-1 | Other requirements for guarding of trolley wires and trolley feeder wires. |
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| 75.1003-2 | 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. |
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| 75.1100 | Requirements. |
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| 75.1100-1 | Type and quality of firefighting equipment. |
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| 75.1100-2 | Quantity and location of firefighting equipment. |
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| 75.1100-3 | Condition and examination of firefighting equipment. |
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| 75.1101 | Deluge-type water sprays, foam generators; main and secondary belt-conveyor drives. |
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| 75.1101-1 | Deluge-type water spray systems. |
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| 75.1101-2 | Installation of deluge-type sprays. |
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| 75.1101-3 | Water requirements. |
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| 75.1101-4 | Branch lines. |
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| 75.1101-5 | Installation of foam generator systems. |
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| 75.1101-6 | Water sprinkler systems; general. |
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| 75.1101-7 | Installation of water sprinkler systems; requirements. |
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