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Results 1 - 5 of 5
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1/1/1995 - Reports of InvestigationsA hydrologic-subsidence investigation was performed to evaluate the effects of longwall mining on the local groundwater regime through field monitoring and numerical modeling.
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1/1/1978 - Reports of InvestigationsSeven degasification wells have been completed in the Pittsburgh coalbed at the New Emerald Mine near Waynesburg, Pennsylvania. The Bureau of Mines performed stimulation treatments on five of the wells.
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1/1/1978 - Reports of InvestigationsThe Bureau of Mines examined the wellbore of a vertical gas drainage well in the Mary Lee coalbed to determine the results of specific completion procedures in coal. A jet-slotting tool was used to cut four vertical slots through the casing about 1 ft b...
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1/1/1978 - Reports of InvestigationsIn this Bureau of Mines investigation, production was monitored for 1 year at over 30 coalbed gas-drainage boreholes located in Alabama, Pennsylvania, and West Virginia.
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1/1/1972 - Reports of InvestigationsThe method of moving averages was found useful in assessing the nature of methane emission in coal mines. Emission rates were influenced markedly by the presence of abandoned oil and gas wells in the vicinity of the mine. Such wells appeared to increase...
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Content source: National Institute for Occupational Safety and Health, Mining Program