The plan shall, where applicable, contain the following: (b) The current mine map or schematic or series of mine maps or schematics of an appropriate scale, not greater than five hundred feet to the inch, showing: (1) Direction and quantity of principal air flows; (2) Locations of seals used to isolate abandoned workings; (3) Locations of areas withdrawn from the ventilation system; (4) Locations of all main, booster and auxiliary fans not shown in paragraph (d) of this standard. (5) Emptied at the end of each shift with the contents returned to a magazine or other storage facility, or attended. (b) An operator must retain a record at the mine site of the training required by this section for one year after completion of the training. (b) If methane reaches 1.0 percent at a work place and there has been a failure of the main ventilation system, all persons shall be withdrawn from the mine. When auxiliary fan systems are used, such systems shall minimize recirculation and be maintained to provide ventilation air that effectively sweeps the working places. 57.22207 Booster fans (I-A, II-A, III, and V-A mines). (2) All persons, except those working on the fan, shall be withdrawn, the ventilation shall be restored to normal and the air quality in the affected active workings shall be tested by a competent person to assure that the air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. 57.12083 Support of power cables in shafts and boreholes. Appendix I to Subpart M of Part 57National Consensus Standards. 24, 1988, 57.22601 was stayed until further notice. 57.22101 Smoking (I-A, II-A, III, and V-A mines). Powerlines, including trolley wires, and telephone circuits shall be protected against short circuits and lightning. Explosive material. (e) Vehicles used for transportation when examining the mine shall be approved by MSHA under the applicable requirements of 30 CFR parts 18 through 36. (b) If methane reaches 1.0 percent at a main exhaust fan, electrical power underground shall be deenergized, except power to monitoring equipment determined by MSHA to be intrinsically safe under 30 CFR part 18, and all persons shall be withdrawn from the mine. Major electrical installation means an assemblage of stationary electrical equipment for the generation, transmission, distribution, or conversion of electrical power. When equipment must be moved or operated near energized high-voltage powerlines (other than trolley lines) and the clearance is less than 10 feet, the lines shall be deenergized or other precautionary measures shall be taken. An application must include the following information: (i) Documentation supporting that controls are technologically or economically infeasible at this time to reduce the miner's exposure to the final DPM limit. Blasting circuits shall be protected from any contact between firing lines and overhead powerlines which could result from the force of a blast. Main fan operation and inspection (I-A, II-A, III, and V-A mines). 57.22303 Approved equipment (I-C mines). Readily visible signs prohibiting smoking and open flames shall be posted where a fire or explosion hazard exists. Any substance classified as an explosive by the Department of Transportation in 49 CFR 173.53, 173.88, and 173.100. (b) Slushers rated over 10 horsepower shall be equipped with backlash guards, unless the equipment operator is otherwise protected. 57.22220 Air passing unsealed areas (I-A, II-A, III, and V-A mines). L. 95164, 91 Stat. The operator must provide a copy of the results to the authorized representative of miners. 22, 1998]. Secondary safety connection means a second connection between a conveyance and rope, intended to prevent the conveyance from running away or falling in the event the primary connection fails. When persons are hoisted, the signaling devices shall be attended until the crosshead has been engaged. Search & Navigation Switches and starting boxes shall be of safe design and capacity. or existing codification. Upon abandonment of a mine, the owner or operator shall effectively close or fence off all surface openings down which persons could fall or through which persons could enter. (2) The mine operator must certify on the application that the operator has posted one copy of the application at the mine site for at least 30 days prior to the date of application, and has provided another copy to the authorized representative of miners. (b) During development of openings to the surface. The wood-grain of one layer shall be perpendicular to the wood-grain of the other layer. (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. All seals, and those stoppings that separate main intake from main return airways, shall be of substantial construction and constructed of noncombustible materials, except that stoppings constructed of brattice materials may be used in face areas. For tests to be considered valid, the equipment shall not slide sideways or exhibit other lateral motion during the braking portion of the test. (b) Blasting machines shall be tested, repaired, and maintained in accordance with manufacturer's instructions. Overhead drive belts shall be guarded to contain the whipping action of a broken belt if that action could be hazardous to persons. Roll-down steel doors with a fire-resistance rating of 112 hours or greater, but without an insulation core, are acceptable provided that an automatic sprinkler or deluge system is installed that provides even coverage of the door on both sides. The hoist operator's independent ventilation system shall be provided by one of the following methods: (a) A suitable enclosure equipped with a positive pressure ventilation system which may be operated continuously or be capable of immediate activation from within the enclosure during an emergency evacuation. Exception: "J" hooks are permitted to be used for setting wooden trusses. 1 In this table, combustible material does not refer to installed wiring or track support. (1) Maintained in good condition and shall comply with the requirements of subpart M of this part; (2) Equipped with sides and enclosures higher than the explosive material being transported or have the explosive material secured to a nonconductive pallet; (3) Equipped with a cargo space that shall contain the explosive material (passenger areas shall not be considered cargo space); (4) Equipped with at least two multipurpose dry-chemical fire extinguishers or one such extinguisher and an automatic fire suppression system; (5) Posted with warning signs that indicate the contents and are visible from each approach; (6) Occupied only by persons necessary for handling the explosive material; (7) Attended or the cargo compartment locked at surface areas of underground mines, except when parked at the blast site and loading is in progress; and, (ii) The wheels chocked if movement could occur; and.

Martin County Recent Arrests, Articles M