Scaling means removal of insecure material from a face or highwall. These incorporated publications are available for inspection at each Metal and Nonmetal Mine Safety and Health District Office of the Mine Safety and Health Administration. Travelway. (a) Dippers, buckets, loading booms, or suspended loads shall not be swung over the operators' stations of self-propelled mobile equipment until the equipment operator is out of the operator's station and in a safe location. A visual check of the completed circuit shall be made to ensure that the components are properly aligned and connected. [52 FR 24941, July 1, 1987, as amended at 69 FR 38842, June 29, 2004]. 57.22237 Actions at 2.0 to 2.5 percent methane in bleeder systems (I-A and III mines). You can Enhanced content is provided to the user to provide additional context. This publication may be examined at any Metal and Nonmetal Mine Safety and Health Subdistrict Office of the Mine Safety and Health Administration, or may be obtained from the American National Standards Institute, Inc., 25 W. 43rd Street, 4th Floor, New York, NY 10036; http://www.ansi.org. This document is available at any MSHA Metal and Nonmetal Safety and Health district office. 57.16004 Containers for hazardous materials. (2) Non-powered, negative-pressure, air purifying, particulate-filter respirators shall use an R- or P-series filter or any filter certified by NIOSH for DPM. Manual material handling (MMH) is the process of routinely moving and handling objects by carrying, holding, lifting, pulling, pushing, and stooping. Upon completion of an investigation, the committee shall make a written report of the findings. 57.12011 High-potential electrical conductors. 57.19074 Riding the bail, rim, bonnet, or crosshead. Prior to coupling or uncoupling cars manually, trains shall be brought to a complete stop, and then moved at minimum tram speed until the coupling or uncoupling activity is completed. Maximum speeds for hoisting persons in buckets. (b) Areas within 25 feet of main fans or booster fans shall be free of combustible materials, except installed wiring, ground and track support, headframes, and direct-fired heaters. 57.14211 Blocking equipment in a raised position. 53 FR 32526, Aug. 25, 1988, unless otherwise noted. Buckets shall be stopped about 15 feet from the shaft bottom to await a signal from one of the crew on the bottom for further lowering. (a) Equipment included. Each operator shall maintain self-rescue devices in good condition. Drill crews and others shall stay clear of augers or drill stems that are in motion. If blasting a loaded round may be delayed for more than 72 hours, the operator shall notify the appropriate MSHA district office. (2) Kept in a totally enclosed cargo space while being transported by a vehicle; (i) Within 50 feet of any magazine or open flame; (ii) Within any building in which a fuel-fired or exposed-element electric heater is operating; or, (iii) In an area where electrical or incandescent-particle sparks could result in powder ignition; and. (a) All underground mines, and the surface mills of Subcategory I-C mines (gilsonite), shall be placed into one of the following categories or subcategories to protect persons against the hazards of methane and dusts containing volatile matter. Scaffolds and working platforms shall be of substantial construction and provided with handrails and maintained in good condition. Such definition is further to be narrowly interpreted, since, as an excuse, it represents an exception to one of the most basic obligations in the sporting system, i.e. In the event of power failure, drill controls shall be placed in the neutral position until power is restored. These records, if retained by the operator, shall be open for inspection by the Secretary of Labor, his authorized representative, and authorized representatives of the official mine inspection agency of the State in which the mine is located. Persons shall not smoke and open flames shall not be used in the vicinity of the oxygen storage and supply lines. Components of the system shall be approved by MSHA under the applicable requirements of 30 CFR parts 18, 22, 23, and 27; or be determined by MSHA under 30 CFR part 18 to be intrinsically safe or explosion-proof. Source: 50 FR 4082, Jan. 29, 1985, unless otherwise noted. Safe means of access shall be provided and maintained to all working places. (b) The volume of air (velocity in Subcategory I-A mines) shall be measured at least once every seven days by a competent person. (b) Trainees and inexperienced persons shall work only in the immediate presence of persons trained and experienced in the handling and use of explosive material. Mobile equipment means wheeled, skid-mounted, track-mounted, or rail-mounted equipment capable of moving or being moved. Engine exhaust gases shall be vented to the atmosphere so that exhaust cannot contaminate mine intake air. The standards in this subpart apply to underground mines as well as surface mills at Subcategory I-C mines. All development, production, and bench rounds shall be initiated from the surface after all persons are out of the mine. 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. The framework assembly of the door and the surrounding bulkhead, if any, shall be at least equivalent to the door in fire and air-leakage resistance, and in physical strength. Cables shall enter metal frames of motors, splice boxes, and electrical compartments only through proper fittings. (b) Circular saws and chain saws shall not be equipped with devices which lock-on the operating controls. Surface firefighting, evacuation, and rescue procedures. (3) Evacuation. (b) Persons attempting to free chute hangups shall be experienced and familiar with the task, know the hazards involved, and use the proper tools to free material. Substantial fixed ladders shall be provided from the collar to as near the shaft bottom as practical during shaft-sinking operations, or an escape hoist powered by an emergency power source shall be provided. (b) This section does not apply when the equipment is specifically designed to protect the equipment operator from falling objects. 57.6900 Damaged or deteriorated explosive material. 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. Main fans shall be maintained according to either the manufacturer's recommendations or a written periodic schedule adopted by the operator which shall be available at the operation on request of the Secretary or his authorized representative. Persons shall not smoke or carry smoking materials, matches, or lighters underground. Filters or separators shall be installed on air-lift fan systems to prevent explosive concentrations of dust from passing through the fan. Any hoist used to hoist persons shall be equipped with a brake or brakes which shall be capable of holding its fully loaded cage, skip, or bucket at any point in the shaft. Exposure limits for airborne contaminants. Organization and Purpose (a) The operator shall calculate and record complete individual exposures to concentrations of radon daughters as follows: (1) Where uranium is minedthe complete individual exposures of all mine personnel working underground shall be calculated and recorded. 57.11012 Protection for openings around travelways. 57.19110 Overhead protection for shaft deepening work. 57.5005 Control of exposure to airborne contaminants. Authorized persons at major electrical installations. (a) Auxiliary fans, except fans used in shops and other areas which have been so designed that methane cannot enter the airway, shall be approved by MSHA under the applicable requirements of 30 CFR part 18, and be operated so that recirculation is minimized. (1) Where uranium is minedradon daughter concentrations representative of worker's breathing zone shall be determined at least every two weeks at random times in all active working areas such as stopes, drift headings, travelways, haulageways, shops, stations, lunch rooms, magazines, and any other place or location where persons work, travel, or congregate. Diesel- and other fuel-injection-powered hoists. (3) Shield the activity so that hot metal and sparks cannot cause a fire. 57.19078 Hoisting buckets from the shaft bottom. 57.11027 Scaffolds and working platforms. (c) Every floor, working place, and passageway shall be kept free from protruding nails, splinters, holes, or loose boards, as practicable. Operating speeds and control of equipment. (6) Notification of the right to appeal the Administrator's determination under 57.22005. (3) Diesel equipment shall be shut off or immediately removed from the area. (2) On the surfacecovered metal containers or equivalent containers with flame containment characteristics. (b) When stored in the same magazine, blasting agents shall be separated from explosives, safety fuse, and detonating cord to prevent contamination. In mines ventilated by multiple main fans, each main fan installation shall be equipped with noncombustible doors. Service of a request for hearing is completed upon mailing by registered or certified mail, return receipt requested. Working level (WL) means any combination of the short-lived radon daughters in one liter of air that will result in ultimate emission of 1.3 105 MeV (million electron volts) of potential alpha energy, and exposure to these radon daughters over a period of time is expressed in terms of working level months (WLM). MSHA Form 5000-41: Safety and Health Activity Certification or Hoisting Engineer Qualification Request This form is affected by the Privacy Act of 1974 Item 1. When ventilation control doors are opened as a part of the normal mining cycle, they shall be closed as soon as possible to re-establish normal ventilation to working places. Dust shall be controlled at muck piles, material transfer points, crushers, and on haulage roads where hazards to persons would be created as a result of impaired visibility. The wood-grain of one layer shall be perpendicular to the wood-grain of the other layer. user convenience only and is not intended to alter agency intent (4) These standards do not apply to wire ropes used for elevators. Underground trailing cables shall be accepted or approved by MSHA as flame resistant. This provision does not apply to rail equipment. No such engineer, however, shall be required for automatically operated cages, platforms, or elevators. A warning that is audible above the surrounding noise level shall be sounded, (b) When trains approach persons, crossing, other trains on adjacent tracks; and. The publication may be examined at any Metal and Nonmetal Mine Safety and Health District Office of the Mine Safety and Health Administration. Detonating cord means a flexible cord containing a solid core of high explosives. (d) ROPS installation. or existing codification. Fiber means a particle longer than 5 micrometers (m) with a length-to-diameter ratio of at least 3-to-1. When a potentially dangerous condition is found it shall be corrected before equipment or wiring is energized. Trolley and trolley feeder wire shall be installed opposite the clearance side of haulageways. Use of liquefied petroleum gases underground shall be limited to maintenance work. Eye protection when operating grinding wheels. This document is available in the following developer friendly formats: Information and documentation can be found in our 1/1.1 Where metallic tools or equipment can come in contact with trolley wires or bare powerlines, the lines shall be guarded or deenergized. Protection for openings around travelways. (3) The operator must maintain any emission or particulate control device installed on the equipment in effective operating condition. (e) Potable water outlets shall be posted. The incorporated instruction guides are available and shall be provided upon request made to any Metal and Nonmetal Mine Safety and Health district office. 57.9330 Clearance for surface equipment. (e) Blasting caps shall be crimped to fuse only with implements designed for that purpose. The main intake and return air currents in single shafts shall be separated by ventilation tubing, curtain walls, or partitions. (e) Blast holes shall be stemmed with a noncombustible material in an amount to confine the explosive charge. Portable extension lights, and other lights that by their location present a shock or burn hazard, shall be guarded. Standard Applicability by Category or Subcategory, PART 57SAFETY AND HEALTH STANDARDSUNDERGROUND METAL AND NONMETAL MINES, http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.
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