1993-06-17_ENFORCEMENT - C1981017 (2)

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93-oq7 §75.1711 30 CFR Ch. 1 (7-1-88 Edition) (d) For purposes of this section, a were suspended indefinitely, effective July canopy or cab will be considered to be 1, 1977. substantially constructed if a regis tered engineer certifies that such 75.1711 Sealing of mines. canopy or cab has the minimum struc- [STATUTORY PROVISIONS] tural capacity to support elastically: (1) A dead weight load of 18,000 On or after March 30, 1970, the + pounds, or (2) 15 p.s.i. distributed uni- opening of any coal mine that is de- J formly over the plan view area of the clared inactive by the operator, or is structure, whichever is lesser. permanently closed, or abandoned for (e) Evidence of the certification re- more than 90 days, shall be sealed by quired by paragraph (d) of this section the operator in a manner prescribed shall be furnished by attaching a by the Secretary. Openings of all plate, label, or other appropriate other mines shall be adequately pro- marking to the canopy or cab for tected in a manner prescribed by the which certification has been made, Secretary to prevent entrance by un- stating that such canopy or cab meets authorized persons. the minimum requirements for struc- tural capacity set forth in paragraph §75.1711-1 Sealing of shaft openings. (d) of this section. Written evidence of Shaft openings required to be sealed such certification shall also be re- under g 75.1711 shall be effectively tained by the operator, and shall be capped or filled. Filling shall be for made available to an authorized repre- the entire depth of the shaft and, for sentative of the Secretary upon re- the first 50 feet from the bottom of ' quest. Written evidence of certifica- the coalbed, the fill shall consist of in- tion may consist of the report of the combustible material. Caps consisting registered engineer who certified the of a 6-inch thick concrete cap or other canopy or cab, or of information from equivalent means may be used for the manufacturer of the canopy or cab sealing. Caps shall be equipped with a stating that a registered engineer has vent pipe at least 2 inches in diameter certified that the canopy or cab meets extending for a distance of at least 15 the minimum requirements for struc- feet above the surface of the shaft. ' tural capacity set forth in paragraph (d)of this section. §75.1711-2 Sealing of slope or drift open- (f) An operator may apply to the Di- ings. rector of Technical Support, Mine Slope or drift openings required to Safety and Health Administration, De- be sealed under g 75.1711 shall be partment of Labor, 4015 Wilson Boule- sealed with solid, substantial, incom- �' vard, Arlington, Va. 22203, for approv- bustible material, such as concrete } y` al of the installation of devices to be blocks, bricks or tile, or shall be com- used in lieu of substantially construct- pletely filled with incombustible mate- ed canopies or cabs on self-propelled rial for a distance of at least 25 feet electric face equipment. The Director into such openings. of Technical Support may approve such devices if he determines that the §75.1711-3 Openings of active mines. use thereof will afford the equipment The openings of all mines not de- operator no less than the same meas- clared by the operator, to be inactive, ure of protection from falls of roof, permanently closed, or abandoned for face, or rib, or from rib and face rolls less than 90 days shall be adequately as would a substantially constructed fenced or posted with conspicuous canopy or cab meeting the require- signs prohibiting the entrance of un- ments of this section. authorized persons. 137 FR 20690,Oct.3, 1972,as amended by 41 ti 75.1712 Bath houses and toilet facilities. FR 23200, June 9, 1976; 43 FR 12320. Mar. 24, 1978;47 FR 28096,June 29, 19821 [STATUTORY PROVISIONS] EFFECTIVE DATE NOTE: At 42 FR 34877, July 7, 1977, the dates appearing in pars- The Secretary may require any oper- graphs (a)(5)(ii) and (a)(6) of t 75.1710-1 ator to provide adequate facilities for 578 TOE- Nv640J7 - 7 n