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The Mine Safety and Health Administration (MSHA) is issuing a proposed rule under section 101(a) of the Federal Mine Safety and Health Act of 1977 (Mine Act) to protect miners working near certain mobile machines in the confined space of an underground coal mine. These miners are exposed to significant hazards from pinning, crushing, and
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The Appliion of the Coal Grain Analysis Method to Coal Analysis, was used to identify coals that might benefit from additional crushing to improve recovery of clean .. mm fraction. This suggests that the crushing of the coal to a top size of 1 mm had resulted in additional liberation, and hence higher recovery.
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By some estimates, the cost of transporting materials in surface mining pits is over 50% of the total operating cost of the mine.
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