['Specialized Industries']

['Mining']

07/19/2025

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§75.403 Maintenance of incombustible content of rock dust.

...

§75.403 Maintenance of incombustible content of rock dust.

RegSense CFR Regulations Mining Specialized Industries CFR Section English Focus Area USA

Where rock dust is required to be applied, it shall be distributed upon the top, floor, and sides of all underground areas of a coal mine and maintained in such quantities that the incombustible content of the combined coal dust, rock dust, and other dust shall be not less than 80 percent. Where methane is present in any ventilating current, the percent of incombustible content of such combined dust shall be increased 0.4 percent for each 0.1 percent of methane.

[75 FR 57857 Sept. 23, 2010; 76 FR 35978 June 21, 2011]

['Specialized Industries']

['Mining']

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