FAR). Landings with more than one shaft entrance. A record of any part that is not functioning properly shall be made and dated. 57.19078 Hoisting buckets from the shaft bottom. Access to unattended mine openings shall be restricted by gates or doors, or the openings shall be fenced and posted. (d) Buckets equipped with positive locks to prevent accidental tripping or dumping. (6) Type and amount of explosive material. [52 FR 24941, July 1, 1987; 52 FR 27903, July 24, 1987, as amended at 67 FR 38385, June 4, 2002; 80 FR 52988, Sept. 2, 2015]. (a) If methane reaches 1.0 percent in the mine atmosphere, all persons other than competent persons necessary to make ventilation changes shall be withdrawn from affected areas until methane is reduced to less than 0.5 percent. Ground wires for lighting circuits powered from trolley wires shall be connected securely to the ground return circuit. Persons shall not enter the mine until ventilating air has passed over the blast area and through at least one atmospheric monitoring sensor. Warning devices for restricted clearances. eCFR :: 30 CFR Part 57 -- Safety and Health Standards - eCFR :: Home All man hoists shall be provided with devices to prevent overtravel. (c) When using detonating cord to initiate another explosive, a connection shall be prepared with the detonating cord threaded through, attached securely to, or otherwise in contact with the explosive. 22, Recommendations for the Safe Transportation of Detonators in a Vehicle with Other Explosive Materials (May 1993), and the Generic Loading Guide for the IME22 Container (October 1993). (1) Provided with an automatic signal device located so that it can be seen or heard by a person designated by the mine operator to give an alarm when the fan stops or when methane reaches the following levels: (i) 1.0 percent at the fan in Subcategory I-A, Category III, and Subcategory V-A mines; and. (a) Waste materials, including liquids, shall not accumulate in quantities that could create a fire hazard. (1) Service brake tests shall be conducted on surface-operated equipment at underground mines when an MSHA inspector has reasonable cause to believe that the service brake system does not function as required, unless the mine operator removes the equipment from service for the appropriate repair; (2) The performance of the service brakes shall be evaluated according to Table M1. (3) Effective May 20, 2008, a miner's personal exposure to diesel particulate matter (DPM) in an underground mine must not exceed an average eight-hour equivalent full shift airborne concentration of 160 micrograms of total carbon per cubic meter of air (160TC g/m3). (c) Mine fan data for all active main and booster fans including manufacturer's name, type, size, fan speed, blade setting, approximate pressure at present operating point, and motor brake horsepower rating. Oxygen cylinders shall not be stored in rooms or areas used or designated for storage of flammable or combustible liquids, including grease. A suitable communication system shall be provided at the mine to obtain assistance in the event of an emergency. This standard does not apply to diesel-powered equipment. Hoist controls shall be placed or housed so that the noise from machinery or other sources will not prevent hoistmen from hearing signals. Movement of dippers, buckets, loading booms, or suspended loads. All blasting lines shall be insulated and kept in good repair. (a) Fired pressure vessels (boilers) shall be equipped with water level gauges, pressure gauges, automatic pressure-relief valves, blowdown piping, and other safety devices approved by the American Society of Mechanical Engineers to protect against hazards from overpressure, flameouts, fuel interruptions and low water level, all as required by the appropriate sections, chapters and appendices listed in paragraphs (b) (1) and (2) of this section. Mantrips shall be operated independently of ore or supply trips. (3) Be done according to predetermined conditions and procedures. Box 2900, Fairfield, New Jersey 07007, Phone: 8008432763 (toll free); http://www.asme.org, and the National Board of Boiler and Pressure Vessel Inspectors, 1055 Crupper Avenue, Columbus, Ohio 43229. Bonding metal pipelines to ground return circuits. (1) Offset so that the fan and its associated components are not in direct line with possible explosive forces; (2) Equipped with explosion-doors, a weak-wall, or other equivalent devices located to relieve the pressure that would be created by an explosion underground. Storage or dry cell batteries are not permitted as power sources. Materials that can create hazards if accidentally liberated from their containers shall be stored in a manner that minimizes the dangers. Flammable or combustible liquid spillage or leakage shall be removed in a timely manner or controlled to prevent a fire hazard. (b) The facility shall be cleaned to prevent accidental detonation. Flexible ventilation tubing shall not exceed 250 feet in length. Fixed ladders, except on mobile equipment, shall be offset and have substantial railed landings at least every 30 feet unless backguards or equivalent protection such as safety belts and safety lines, are provided. 57.12003 Trailing cable overload protection. Travelway means a passage, walk or way regularly used and designated for persons to go from one place to another. 57.9303 Construction of ramps and dumping facilities. 1926.1431 - Hoisting personnel. | Occupational Safety and Health Damaged or deteriorated wire rope shall be removed by cutoff and the rope reterminated where there is. 57.19008 Friction hoist synchronizing mechanisms. In a friction hoist installation, tapered guides or other approved devices shall be installed above and below the limits of regular travel of the conveyance and arranged to prevent overtravel in the event of failure of other devices. (c) When respiratory protection is used in atmospheres immediately harmful to life, the presence of at least one other person with backup equipment and rescue capability shall be required in the event of failure of the respiratory equipment. Gas samples taken to determine the nature and extent of an occurrence under 57.22004 (c) and (d) may be taken at any location, including the source, point of entry and the mine atmosphere. 57.22239 Actions at 2.0 percent methane (IV mines). 57.14112 Construction and maintenance of guards. (1) Effective May 20, 2006, a miner's personal exposure to diesel particulate matter (DPM) in an underground mine must not exceed an average eight-hour equivalent full shift airborne concentration of 308 micrograms of elemental carbon per cubic meter of air (308EC g/m3). 57.20001 Intoxicating beverages and narcotics. This bar shall be of a length and design that will allow the removal of loose material without exposing the person performing the work to injury.
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