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Roof fall accidents decline, but remain leading cause of coal miner injuries MSHA initiative promotes continuous mining machine operator safety
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COAL (see also LIGNITE) — Bituminous coal, which occurs in North Central, South, and West Texas, was a significant energy source in Texas prior to the largescale ...
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Mining of coal and metallic minerals in Washington began in the mid to late 1800s. Coal production in Washington hit a high in 2003 with an estimated total production ...
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