['Specialized Industries']

['Mining']

07/19/2025

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§57.22309 Methane monitors (V-A mines).

...

§57.22309 Methane monitors (V-A mines).

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

(a) Methane monitors shall be installed on continuous mining machines used in or beyond the last open crosscut.

(b) The monitors shall—

(1) Give warning at 1.0 percent methane.

(2) Automatically deenergize electrical equipment, except power to monitoring equipment determined by MSHA to be intrinsically safe under 30 CFR Part 18, and prevent starting of such equipment when methane levels reach 1.5 percent; and

(3) Automatically deenergize the equipment when power to a sensor is interrupted.

(c) Sensing units of monitors shall be positioned at a location which provides for the most effective measurement of methane.

['Specialized Industries']

['Mining']

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