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Geological factors affecting methane in the Beckley coalbed.

Authors
Popp-JT; McCulloch-CM
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 8137, 1976 Jan; :1-35
NIOSHTIC No.
10000630
Abstract
This Bureau of Mines study reviews the geological factors that affect methane in the Beckley coalbed in southern West Virginia, including overburden, coalbed structure, type of and changes in lithology above and below the Beckley coalbed, and presence of fractures in the coal and rock adjacent to Beckley. Depending on the depth, the Beckley coalbed emits from 216 to 520 ft3 of methane per ton of coal mined, and the Bureau estimates that methane emission in a deep, extensively developed mine in this area may exceed 3,000 ft3 per day per ton of coal mined. Average face cleat and butt cleat trends in the Beckley coalbed measured underground are N 33 deg. W and N 53 deg. E, respectively. Close cleat spacing contributes to the friable nature of the Beckley and provides easy movement for methane and water. Because rider coals, splits, and carbonaceous shales may contribute methane to mine emissions, predictions of methane emission based on gas content of the Beckley coalbed alone may be conservative. Beckley coalbed reserves in the study area are 234 million tons. The gas content of the Beckley coalbed averages 407 ft3/ton, and the coalbed gas reserves are 108 billion ft3.
Keywords
Mining-industry; Methane-control; Methane-drainage; Methanes; Underground-mining; Coal-mining; Mine-gases; Geology; Explosive-gases; Explosive-atmospheres; Control-technology; Engineering-controls
CAS No.
74-82-8
Publication Date
19760101
Document Type
IH; Report of Investigations
Fiscal Year
1976
NTIS Accession No.
PB-254186
NTIS Price
A04
Identifying No.
RI-8137
NIOSH Division
PRC
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 8137
State
PA; WV
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