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- Population groups:
- U.S. Bureau of Mines
- Document types:
- Reports of Investigations
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Results 21 - 22 of 22
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1/1/1975 - Reports of InvestigationsGeological surveys were completed in six coal mines to study the overall geology of the coalbed, and to use the resulting data to evaluate the influence of the geological characteristics of the coalbed on safe and efficient coal extraction.
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1/1/1962 - Reports of InvestigationsA joint investigation by the Bureau of Mines and the Christopher Coal Co. at the Humphrey No. 7 mine, operating in the Pittsburgh coalbed in northern West Virginia, was undertaken to gain more insight concerning the hazardous emission of methane gas in ...
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Content source: National Institute for Occupational Safety and Health, Mining Program