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. 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. Water, debris, or spilled material on roadways which creates hazards to the operation of mobile equipment shall be removed. (2) Combustible liquids in closed containers. Box 371954, Pittsburgh, PA 152507954; Telephone: 8665121800 (toll free) or 2025121800; 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. Principal power switches shall be labeled to show which units they control, unless identification can be made readily by location. 57.22220 Air passing unsealed areas (I-A, II-A, III, and V-A mines). For information on the availability of this material at NARA, call 2027416030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html. 57.19063 Persons allowed in hoist room. For rope lengths 3,000 feet or greater: Minimum Value = Static Load 4.0. The operator must retain purchase records that demonstrate compliance with this requirement for one year after the date of purchase. 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, (b) The torch and hoses are left unattended; or. Portable extension lights, and other lights that by their location present a shock or burn hazard, shall be guarded. Persons shall stay clear of suspended loads. 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. Abandoned workings means deserted mine areas in which further work is not intended. Mine opening means any opening or entrance from the surface into a mine. (a) A competent person designated by the operator shall examine each working place at least once each shift before miners begin work in that place, for conditions that may adversely affect safety or health. (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. (d) Remaining idle for one shift or longer. The Mine Safety and Health Administration (MSHA) (/ m /) is a large agency of the United States Department of Labor which administers the provisions of the Federal Mine Safety and Health Act of 1977 (Mine Act) to enforce compliance with mandatory safety and health standards as a means to eliminate fatal accidents, to reduce the frequency and severity of nonfatal accidents, to . 552(a) and 1 CFR part 51. 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. (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. 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. (a) All development, production, and bench rounds shall be initiated from the surface after all persons are out of the mine. Actions at 2.0 to 2.5 percent methane in bleeder systems (I-A and III mines). While in operation, drills shall be attended at all times. 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. (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. 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). Excursions above the listed thresholds shall not be of a greater magnitude than is characterized as permissible by the Conference. When blasting on shift, tests for methane shall be made in the mine atmosphere by a competent person before blasting. (a) Reciprocating-type air compressors rated over 10 horsepower shall be equipped with automatic temperature-actuated shutoff mechanisms which shall be set or adjusted to the compressor when the normal operating temperature is exceeded by more than 25 percent. (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. Every person underground shall carry a positive means of being identified. This content is from the eCFR and may include recent changes applied to the CFR. This standard does not apply to rail equipment. Buckets shall not be overloaded, and feed shall be regulated to prevent spillage. ( 2) Platform occupants must: ( i) Keep all parts of the body inside the platform during raising, lowering, and horizontal movement. Auxiliary equipment stations (I-A and III mines). Conveyances shall not be lowered by the brakes alone except during emergencies. Ammonium nitrate blasting agents shall not be loaded into wet holes. contact the publishing agency. Alternative measures are not permitted. Until such changes are achieved. All detonators in a round shall be made by the same manufacturer. (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. Primer. Guard nets or other suitable protection shall be provided where tramways pass over roadways, walkways, or buildings. Vents for storage of Class II or IIIA liquids shall be isolated or separated from ignition sources. 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. NFPA No. When parked on a grade, the wheels or tracks of mobile equipment shall be either chocked or turned into a bank or rib. 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. Operating speeds shall be consistent with conditions of roadways, tracks, grades, clearance, visibility, and traffic, and the type of equipment used. will bring you to those results. A flexible cord containing a center core of high explosives which may be used to initiate other explosives. (c) The affected area shall be inspected during the first hour after the operation is completed. (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. (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. 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. 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. Actions at 1.0 percent methane (I-A, I-B, III, V-A, and V-B mines). 57.19013 Diesel- and other fuel-injection-powered hoists. 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. 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. (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) Undergroundcovered metal containers. Scaling means removal of insecure material from a face or highwall. 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. A plan of the mine ventilation system shall be set out by the operator in written form. The term also is used to describe the explosive material itself that has failed to detonate. [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]. Initiation systems shall be used in accordance with the manufacturer's instructions. (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. 57.22238 Actions at 2.0 percent methane (I-B, II-B, V-B, and VI 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. (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. Notification of commencement of operations and closing of mines. Control of exposure to airborne contaminants. (9) Statements by witnesses, company officials, employees, and other persons having knowledge of the mine or the occurrence. 57.6701 Tamping and loading pole requirements. In the event of power failure, drill controls shall be placed in the neutral position until power is restored. Other certifications shall be retained for one year. Parked railcars shall be blocked securely unless held effectively by brakes. (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. (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. 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). (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. Machinery or equipment shall not be lubricated manually while it is in motion where application of the lubricant may expose persons to injury. Each operator of an underground mine shall establish a check-in and check-out system which shall provide an accurate record of persons in the mine. (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. (3) The operator must maintain any emission or particulate control device installed on the equipment in effective operating condition.
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