WASHINGTON, Feb. 19 (TNSFR) -- The Mine Safety and Health Administration (MSHA) has received a petition from Blue Diamond Coal Co. seeking a modification of existing safety regulations at its Calvary No. 81 Mine in Leslie County, Kentucky. The company is requesting an exemption from the requirement that only MSHA-approved electrical equipment be used within 150 feet of pillar workings or longwall faces.

Specifically, the petition aims to permit the use of unapproved Powered Air Pur . . .

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