Detonating cord. (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. 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. (1) Persons in shafts and slopes underground; (2) Persons with an incline hoist on the surface; or. Main fan operation and inspection (I-A, II-A, III, and V-A mines). Protection for openings around travelways. [52 FR 24941, July 1, 1987, as amended at 52 FR 41397, Oct. 27, 1987; 60 FR 33723, June 29, 1995]. 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. The velocity of air ventilating each face at a work place shall be at least 20 feet per minute. More than 1 gallon of combustible liquid, unless in a closed, metal container. Ground moisture may be present to the extent that it does not adversely affect the braking surface. Procedures during repairs or maintenance. (a) Areas within 25 feet of the following shall be free of combustible materials: (2) Unburied, combustible liquid storage tanks. (1) Mining and operating procedures designed to reduce the occurrence of rock bursts; (2) Monitoring procedures where detection methods are used; and. (2) Make this certification available to an authorized representative of the Secretary and to the representative of miners. (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. (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; (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. Protective equipment or clothing for welding, cutting, or working with molten metal. Operating speeds shall be consistent with conditions of roadways, tracks, grades, clearance, visibility, and traffic, and the type of equipment used. Scaffolds and working platforms shall be of substantial construction and provided with handrails and maintained in good condition. 12AHalon 1301 Extinguishing Systems. Mobile equipment used for haulage of mined material shall be loaded to minimize spillage where a hazard to persons could be created. (f) Potable water systems shall be constructed to prevent backflow or backsiphonage of non-potable water. (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. Until methane is reduced to less than 0.5 percent, no other work shall be permitted in affected areas. Stationary grinding machines, other than special bit grinders, shall be equipped with. by Ukrainian sporting regulations. Large rocks shall be broken before loading if they could endanger persons or affect the stability of mobile equipment. Railcars shall not be left on side tracks unless clearance is provided for traffic on adjacent tracks. This back-up system shall consist of compressed air stored in containers connected to the enclosure. Source: 50 FR 4082, Jan. 29, 1985, unless otherwise noted. [53 FR 32526, Aug. 25, 1988, as amended at 55 FR 37218, Sept. 7, 1990]. (a) Mine operators shall establish emergency firefighting, evacuation, and rescue procedures for the surface portions of their operations. Exits for surface buildings and structures. A storage facility used to store blasting agents corresponds to a BATF Type 4 or 5 storage facility. 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. 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. If you have questions or comments regarding a published document please [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; 85 FR 2027, Jan. 14, 2020]. Concrete, masonry block, brick, and steel are examples of noncombustible materials. If used as an alternative, control doors shall be. (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. (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. (d) All piping, valves, and fittings shall be: (3) Maintained in a manner which prevents leakage. 57.14114 Air valves for pneumatic equipment. During performance of an activity underground described in Table C2 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. 57.14210 Movement of dippers, buckets, loading booms, or suspended loads. 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. Insulation means a dielectric substance offering a high resistance to the passage of current and to a disruptive discharge through the substance. If fire hydrants are part of the mine's firefighting system, the hydrants shall be provided with. Approved testing devices (I-A, I-B, I-C, II-A, II-B, III, IV, V-A, and V-B mines). (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. (3) An automatic reverse-activated strobe light may be used at night in lieu of an audible reverse alarm. The official, published CFR, is updated annually and available below under 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. Certifications shall be retained for at least one year after each drill. This document is available at any MSHA Metal and Nonmetal Safety and Health district office. Mobile equipment means wheeled, skid-mounted, track-mounted, or rail-mounted equipment capable of moving or being moved. Mobile equipment shall not run over power conductors, nor shall loads be dragged over power conductors, unless the conductors are properly bridged or protected. (c) Electrical switches and outlets shall be located on the outside of the magazine. 57.22206 Main ventilation failure (I-A, II-A, III, and V-A mines). (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. Electrical conductors exposed to mechanical damage shall be protected. (c) Dry vegetation shall not be permitted within 25 feet of mine openings. Holes shall not be drilled where there is a danger of intersecting a misfired hole or a hole containing explosives, blasting agents, or detonators. 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. 57.14160 Mantrip trolley wire hazards underground. (c) Load end attachment methods using splices are prohibited. 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. (j) Publications. This requirement does not apply to battery-operated equipment. Explosive material shall be transported without undue delay to the storage area or blast site. 57.9302 Protection against moving or runaway railroad equipment. Where mine cars are hoisted by cage or skip, means for blocking cars shall be provided at all landings and also on the cage. Blasting shall not be done when 1.0 percent or more methane is present. 57.19061 Maximum hoisting speeds. Wet drilling means the continuous application of water through the central hole of hollow drill steel to the bottom of the drill hole. 1 Except for stainless steel and steel used for compressed gas cylinders, all other steel shells are defined as mild steel shells. To prevent injury to personnel, tools and other objects shall not be left loose on the mast or drill platform. Underground trailing cables shall be accepted or approved by MSHA as flame resistant. (2) Not be modified, in a manner that obscures visibility necessary for safe operation. (c) Any place where the train operator's vision is obscured. (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: (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. (d) Covered on all combustible interior and exterior structural surfaces with noncombustible material or limited combustible material, such as five-eighth inch, type X gypsum wallboard. 552(a) and 1 CFR part 51. How Dnipro's tough-talking mayor keeps his city on a war footing (3) All access routes to the blast area shall be guarded or barricaded to prevent the passage of persons or vehicles. (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. (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. (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. Upon completion of an investigation, the committee shall make a written report of the findings. Control of exposure to airborne contaminants. 57.20031 Blasting underground in hazardous areas. Each operator shall maintain self-rescue devices in good condition. 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). A systematic procedure of inspection, testing and maintenance of shaft and hoisting equipment shall be developed and followed. Protection against moving or runaway railroad equipment. (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. [66 FR 5907, Jan. 19, 2001; 66 FR 35520, July 5, 2001]. 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, which is available at any MSHA Metal and Nonmetal Safety and Health district office. All headframes shall be constructed with suitable design considerations to allow for all dead loads, live loads, and wind loads. 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. (2) Flame safety lamps shall not be used in Subcategory I-C mines. (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. 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. The ends of such conduit or pipe shall be sealed to prevent entry of explosive gas or dust. Life jackets or belts shall be worn where there is danger from falling into water. (e) Rotation of miners shall not be considered an acceptable administrative control used for compliance with the DPM standard. This standard does not apply to fuel lines on self-propelled equipment. The windows shall be maintained to provide visibility for safe operation. (3) Fire extinguishers shall be hydrostatically tested according to Table C1 or a schedule based on the manufacturer's specifications to determine the integrity of extinguishing agent vessels. (c) When a condition that may adversely affect safety or health is corrected, the examination record shall include, or be supplemented to include, the date of the corrective action. Individual electric lamps shall be carried for illumination by all persons underground. All personnel hoists used by employees shall be constructed of materials and components which meet the specifications for materials, construction, safety devices, assembly, and structural integrity as stated in the American National Standard A10.4-1963, Safety Requirements for Workmen's Hoists. 57.22237 Actions at 2.0 to 2.5 percent methane in bleeder systems (I-A and III mines). 57.22216 Separation of intake and return air (I-C mines). 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. (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.