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A. Substantially constructed line brattice shall be used from the last open crosscut of an entry or room when necessary to provide adequate ventilation for the miners and to remove gases. Any line brattice damaged by falls or otherwise shall be repaired promptly. B. The space between the line brattice and the rib shall be large enough to permit the flow of a sufficient volume of air to keep the working face clear of flammable and noxious gases. C. Brattice cloth used underground shall be of flame-resistant material. D. Accumulations of methane shall be moved only by means of properly installed line brattice, or other approved method. Code 1950, § 45-60.4; 1954, c. 191; 1966, c. 594, § 45.1-61; 1994, c. 28 ; 1996, c. 28 .
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