Current through Register Vol. 54, No. 41, October 12, 2024
Section 208.71 - Maintenance of incombustible content of rock dust(a) Where rock dust is required to be applied, it shall be distributed upon the top, floor and sides of the underground areas of a coal mine and maintained in quantities so that the incombustible content of the combined coal dust, rock dust and other dust is not less than 80%.(b) Where methane is present in a ventilating current, the percent of incombustible content of the combined dust as required under subsection (a) shall be increased 0.4% for each 0.1% of methane.(c) Moisture in the combined coal dust, rock dust and other dusts shall be considered as a part of the incombustible content of the mixture.The provisions of this §208.71 adopted December 13, 2013, effective 12/14/2013, 43 Pa.B. 7275.The provisions of this §208.71 issued under sections 106 and 106.1 of the Bituminous Coal Mine Safety Act (52 P. S. §§ 690-106 and 690-106.1).