msha hoisting regulations

57.22304 Approved equipment (II-A mines). This content is from the eCFR and is authoritative but unofficial. Electrical distribution circuits within 50 feet of electric detonators at the blast site shall be deenergized. (i) Constructed so that, once closed, it will not reopen as a result of a differential in air pressure; (ii) Constructed so that it can be opened from either side by one person or be provided with a personnel door that can be opened from either side; (iv) Provided with a means of remote or automatic closure unless a person specifically designated to close the door in the event of a fire can reach the door within three minutes. [51 FR 36198, Oct. 8, 1986, as amended at 60 FR 33723, June 29, 1995; 60 FR 35695, July 11, 1995; 71 FR 16667, Apr. At 67 FR 9184, Feb. 27, 2002, paragraphs (b)(1) and (b)(2) were revised, effective Mar. We recommend you directly contact the agency responsible for the content in question. (2) The escape route shall bypass the shop area so that the route will not be affected by a fire in the shop area. Conductive portions of nonmetal magazines shall be grounded. FAR). This document is available at any MSHA Metal and Nonmetal Safety and Health district office. 57.12050 Installation of trolley wires. (2) Alarms shall be audible above the surrounding noise level. To prevent injury to personnel, tools and other objects shall not be left loose on the mast or drill platform. The official, published CFR, is updated annually and available below under Main fans shall be operated continuously while ore production is in progress. Igniter cord means a fuse, cordlike in appearance, which burns progressively along its length with an external flame at the zone of burning, and is used for lighting a series of safety fuses in the desired sequence. A statement of reasons for the action taken shall be included in the final decision. This record shall be retained until the rope is retired from service. Suitable warning signs shall be posted by the individuals who are to do the work. (c) Where a person works on or around mobile equipment, self-rescue devices may be placed in a readily accessible location on such equipment. 57.4660 Work in shafts, raises, or winzes and other activities involving hazard areas. (2) All persons, except those working on the fan, shall be withdrawn, the ventilation shall be restored to normal and the air quality in the affected active workings shall be tested by a competent person to assure that the air quality meets the requirements of the standards in subpart D of this part, before any other persons are permitted to enter the affected active workings. Dust containing volatile matter shall not be allowed to accumulate on the surfaces of enclosures, facilities, or equipment used in surface milling in amounts that, if suspended in air, would become an explosive mixture. [52 FR 24941, July 1, 1987; 52 FR 27903, July 24, 1987]. Seals and stoppings (I-A, I-B, and I-C mines). If methane reaches 0.25 percent in the mine atmosphere, changes shall be made to improve ventilation, and MSHA shall be notified immediately. (1) Capable of withstanding working pressures and stresses and compatible with the type of liquid stored; (2) Maintained in a manner that prevents leakage; (3) Isolated or separated from ignition sources to prevent fire or explosion; and. All boilers and pressure vessels shall be constructed, installed, and maintained in accordance with the standards and specifications of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code. Insulation means a dielectric substance offering a high resistance to the passage of current and to a disruptive discharge through the substance. Mine operators seeking further information regarding the construction and installation of falling object protective structures (FOPS) may consult the following national consensus standards, as applicable. (2) The reasons for placement or change in placement; (4) The applicable standards and a time schedule for the mine operator to achieve compliance; (5) Whether or not conditions encountered during primary or access development are transient or permanent; and. Movement of two or more pieces of rail equipment operating independently on the same track shall be controlled for safe operation. Suitable clearance at shaft stations shall be provided to allow safe movement of persons, equipment and materials. 57.9306 Warning devices for restricted clearances. 57.7013 Covering or guarding drill holes. (f) Within 30 days after service of an initial decision of an Administrative Law Judge, the Assistant Secretary for Mine Safety and Health may undertake a discretionary review of the initial decision, or the mine operator, or representative of the miners may appeal the initial decision of the Administrative Law Judge to the Assistant Secretary. (b) Fixtures and accessories not addressed in ASTM F43295 may be used for ground support provided they, (1) Have been successful in supporting the ground in an area with similar strata, opening dimensions and ground stresses in any mine; or. Ramps and dumping facilities shall be designed and constructed of materials capable of supporting the loads to which they will be subjected. (1) Acceptable levels of combustible gases and oxygen in retort off-gases during start-up and during burning; levels at which corrective action will be initiated; levels at which personnel will be removed from the retort areas, from the mine, and from endangered surface areas; and the conditions for reentering the mine; (2) Specification and locations of off-gas monitoring procedures and equipment; (3) Specifications for construction of retort bulkheads and seals, and their locations; (4) Procedures for ignition of a retort and for reignition following a shutdown; and. Such measurement shall be done at the following locations: (5) In the last open crosscuts or other ventilation openings nearest the active faces where the air enters the return. Face shields or goggles in good condition shall be worn when operating a grinding wheel. Prior to secondary breakage operations, the material to be broken, other than hanging material, shall be positioned or blocked to prevent movement which would endanger persons in the work area. 57.12030 Correction of dangerous conditions. Suitable danger signs shall be posted at all major electrical installations. (2) At least once every twelve months, maintenance checks shall be made of mechanical parts, the amount and condition of extinguishing agent and expellant, and the condition of the hose, nozzle, and vessel to determine that the fire extinguishers will operate effectively. Within 20 feet of: timbered areas, exposed combustible rock, or other combustible material, Control door that serves as a barrier to fire, the effects of fire, and air-leakage. Telephone and low-potential signal wire shall be protected, by isolation or suitable insulation, or both, from contacting energized power conductors or any other power source. Grizzlies and other stationary sizing devices shall be securely anchored. Equipment and supplies shall be loaded, transported, and unloaded in a manner which does not create a hazard to persons from falling or shifting equipment or supplies. (2) Strategically located, readily accessible, plainly marked, and maintained in fire-ready condition. Jet piercing drills shall be provided with: (a) A system to pressurize the equipment operator's cab, when a cab is provided; and. [52 FR 24941, July 1, 1987, as amended at 52 FR 41397, Oct. 27, 1987; 60 FR 33722, June 29, 1995]. Appendix I to Subpart M of Part 57National Consensus Standards. Employer means a person or organization which hires one or more persons to work for wages or salary. If any part of a blast is connected in parallel and is to be initiated from powerlines or lighting circuits, the time of current flow shall be limited to a maximum of 25 milliseconds. (3) Equipped with starting and stopping controls located at the fan and at another accessible remote location. [53 FR 32526, Aug. 25, 1988, as amended at 60 FR 35695, July 11, 1995; 71 FR 16667, Apr. Automatic hoists shall be provided with devices that automatically apply the brakes in the event of power failure. Self propelled equipment, which is to be used during a shift, must be inspected by the equipment operator before being placed in 57.11005 Fixed ladder anchorage and toe clearance. Persons shall not work or pass under the buckets or booms of loaders in operation. Air passing unsealed areas (I-A, II-A, III, and V-A mines). The equipment must also be blocked or secured to prevent rolling. Enhanced content is provided to the user to provide additional context. Where access is necessary, suitable clearance shall be provided at stationary electrical equipment or switchgear. Category V is divided into Subcategories V-A and V-B as follows: (i) Subcategory V-A applies to petroleum mines that operate entirely or partially within an oil reservoir; and all other petroleum mines in which, (ii) Subcategory V-B applies to petroleum mines that operate outside of and drill into an oil reservoir and in which. (f) Safety fuse shall be ignited only after the primer and the explosive material are securely in place. Table M2The Speed of a Vehicle Can Be Determined by Clocking It Through a 100-Foot Measured Course at Constant Velocity Using Table M2. (d) Buckets equipped with positive locks to prevent accidental tripping or dumping. 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. Dnipro State Medical University was founded on September 15, 1916, from the Ekaterynoslavsky Higher Female Courses Institute. 57.5005 Control of exposure to airborne contaminants. Hand-held electric tools shall not be operated at high potential voltages. Mobile equipment used for haulage of mined material shall be loaded to minimize spillage where a hazard to persons could be created. Smoking shall be prohibited in all areas of a mine where exposure records are required to be kept in compliance with standard 57.5040. (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. Permissible means a machine, material, apparatus, or device which has been investigated, tested, and approved by the Bureau of Mines or the Mine Safety and Health Administration, and is maintained in permissible condition. 57.13021 High-pressure hose connections. You can learn more about the process The movement of a shaft conveyance on a one bell signal is prohibited. Mantrips shall be covered if there is danger of persons contacting the trolley wire. (a) Be securely attached to a crosshead when traveling in either direction between the lower and upper crosshead parking locations; (b) Have overhead protection when the shaft depth exceeds 50 feet; (c) Have sufficient depth or a suitably designed platform to transport persons safely in a standing position; and. 57.12010 Isolation or insulation of communication conductors. Persons shall not enter the mine until ventilating air has passed over the blast area and through at least one atmospheric monitoring sensor. When the Service Brakes Are Applied at the End of the Course, Stopping Distance Can Be Measured and Compared to Table M1. Insulated means separated from other conducting surfaces by a dielectric substance permanently offering a high resistance to the passage of current and to disruptive discharge through the substance. The following definitions apply to this part. (b) A fire suppression system may be used as an alternative to fire extinguishers if the system can be manually activated. Mechanical ventilation (I-A, I-B, I-C, II-A, II-B, III, IV, V-A, and V-B mines). (d) Spills shall be cleaned up promptly with nonsparking equipment. (a) On the surface, no more than one day's supply of combustible materials shall be stored within 100 feet of mine openings or within 100 feet of fan installations used for underground ventilation. (c) Not be used to ventilate work places. While in operation, drills shall be attended at all times. (b) Vehicles and equipment shall not be driven over explosive material or initiating systems in a manner which could contact the material or system, or create other hazards. This publication may be obtained from the American Conference of Governmental Industrial Hygienists by writing to 1330 Kemper Meadow Drive, Attn: Customer Service, Cincinnati, OH 45240, http://www.acgih.org, or may be examined in any Metal and Nonmetal Mine Safety and Health District Office of the Mine Safety and Health Administration. Telephone or other voice communication shall be provided between the surface and refuge chambers and such systems shall be independent of the mine power supply.

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