msha hoisting regulations

57.16010 Dropping materials from overhead. Class IIIB liquidsthose having flash points at or above 200 F (93.4 C). The retort plan shall include. (1) Within twenty four hours report to the nearest MSHA office each rock burst which: (iv) Disrupts mining activity for more than one hour. 57.12010 Isolation or insulation of communication conductors. For rope lengths less than 3,000 feet: Minimum Value = Static Load (7.0 0.001L). A means shall be provided to guide the movement of a shaft conveyance. 57.4260 Underground self-propelled equipment. 57.19006 Automatic hoist braking devices. 57.11016 Snow and ice on walkways and travelways. [50 FR 4082, Jan. 29, 1985; 50 FR 20100, May 14, 1985]. A unit, package, or cartridge of explosives which contains a detonator and is used to initiate other explosives or blasting agents. 57.19065 Lowering conveyances by the brakes. This contact form is only for website help or website suggestions. These publications may be obtained from the publishers, the American Society of Mechanical Engineers, 22 Law Drive, P.O. (c) The affected area shall be inspected during the first hour after the operation is completed. Seals and stoppings (I-A, I-B, and I-C mines). Drill crews and others shall stay clear of augers or drill stems that are in motion. The following definitions apply in this subpart. Air passing unsealed areas (I-A, II-A, III, and V-A mines). All blasting lines shall be insulated and kept in good repair. (1) When the operator has an obstructed view to the rear, self-propelled mobile equipment shall have. Fire extinguishers or manual actuators for the suppression system shall be located to permit their use by persons whose escape could be impeded by fire. (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. (d) The diameter of finishing bits shall be within a tolerance of plus or minus 0.030 inch of the manufacturer's recommended hole diameter for the anchor used. The term also is used to describe the explosive material itself that has failed to detonate. 57.22204 Main fan operation and inspection (I-A, II-A, III, and V-A mines). 57.19007 Overtravel and overspeed devices. 57.18014 Emergency medical assistance and transportation. Machinery, equipment, and tools shall not be used beyond the design capacity intended by the manufacturer, where such use may create a hazard to persons. When a train is under the direction of a brakeman and the train operator cannot clearly recognize the brakeman's signals, the train operator shall bring the train to a stop. (3) Aluminum alloy fan blades shall not contain more than 0.5 percent magnesium. A standard code of hoisting signals shall be adopted and used at each mine. Stationary diesel equipment underground shall be, (a) Supported on a noncombustible base; and. [50 FR 4082, Jan. 29, 1985, as amended at 60 FR 33723, June 29, 1995; 60 FR 35695, July 11, 1995; 71 FR 16667, Apr. (a) At least 100 feet from fan installations used for intake air and mine openings; (b) Equipped with exhaust vents over the forge and ventilated to prevent the accumulation of the products of combustion; and. 57.13001 General requirements for boilers and pressure vessels. The control handle shall be clearly labeled to indicate that its intended function is for emergency stopping only. 57.22240 Actions at 2.0 percent methane (V-A mines). 57.11025 Railed landings, backguards, and other protection for fixed ladders. 57.6400 Compatibility of electric 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. Duration of miner's employment plus 6 months. 57.22231 Actions at 0.25 percent methane (I-B, II-B, V-B, and VI mines). Safety Devices and Maintenance Requirements. 57.9311 Anchoring stationary sizing devices. Transformers shall be totally enclosed, or shall be placed at least 8 feet above the ground, or installed in a transformer house, or surrounded by a substantial fence at least 6 feet high and at least 3 feet from any energized parts, casings, or wiring. At 67 FR 9184, Feb. 27, 2002, paragraphs (b)(1) and (b)(2) were revised, effective Mar. (ii) Subcategory II-B applies to domal salt mines where an outburst reportable under 57.22004(c)(1) has not occurred, but which have the potential for an outburst based on the history of the mine or geological area in which the mine is located. 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). Explosives, blasting agents, and detonators. 57.8534 Shutdown or failure of auxiliary fans. 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. Couplings used on underground rail equipment shall be designed for that equipment, except that makeshift couplings may be used to move disabled rail equipment for repairs if no hazard to persons is created. (3) A mine operator must retain a log of any equipment tagged pursuant to this section. Stopblocks, derail devices, or other devices that protect against moving or runaway rail equipment shall be installed wherever necessary to protect persons. (b) In addition, the buildings or rooms shall be, (1) Constructed to meet a fire resistance rating of at least one hour; or, (2) Equipped with an automatic fire suppression system; or. An average airborne radon daughter concentration for a designated active working area shall be determined by averaging all sampling results for that working area during the time that persons are present. (a) Self-propelled mobile equipment to be used during a shift shall be inspected by the equipment operator before being placed in operation on that shift. Mine emergency and self-rescuer training. Multipurpose dry-chemical fire extinguisher means an extinguisher having a rating of at least 2A:10B:C and containing a nominal 4.5 pounds or more of dry-chemical agent.

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