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Methane drainage study using an underground pipeline, Marianna mine 58
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1981
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Series: Mining Publications
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Description:"The Bureau of Mines has completed an underground degasification project in which an underground piping system was used to transport methane from the coalbed to the surface. In a 10-month period four horizontal holes were drilled to an average depth of 1,450 feet. All four holes were surveyed vertically and azimuthally. In 991 days of degasification, 255 MMCF of gas was drained from the coalbed. The underground piping system proved to be a safe and effective means of transporting methane from the coalbed to the surface." - NIOSHTIC-2
NIOSHTIC no. 10006743
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Pages in Document:ii, 29 numbered pages
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NIOSHTIC Number:nn:10006743
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[PDF-3.75 MB]