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Removing methane (degasification) from the Pocahontas No. 4 coalbed in southern West Virginia.

Authors
Merritts-WM; Waine-CR; Mokwa-LP; Ackerman-MJ
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 6326, 1963 Jan; :1-39
NIOSHTIC No.
20030772
Abstract
Tests were conducted in the Pocahontas No. 4 coalbed in southern West Virginia to determine if successful degasification techniques, developed during an earlier study in the Pittsburgh coalbed, would be effective in removing methane from those usually more gaseous coals. Specially designed long-hole drilling equipment and Bureau of Mines continuous recording devices were used to measure the quantity and methane content of the ventilating air during the investigation. Infusions were made with water at normal waterline pressures ranging from 200 to 220 psi or at pump pressures ranging from 400 to 650 psi, Results of the tests showed that methane emissions from free-flow bleeder holes were as much as 131 cfm. Infusions of some of the holes increased the methane emission from other holes and from the exposed coal surfaces near the working areas as much as 1,540 cfm. The methane content in the main return air currents after infusion was reduced more than 86 percent of the amount recorded before tests were made.
Keywords
Pipe-flow; Gas-flow; Ducts; Ventilation; Mining; Mine-ventilation; Mineral-industries; Mine-gases; Mining-industry; Methanes; Methane-drainage; Methane-control; Explosive-gases; Explosive-atmospheres; Underground-mining; Coal-mining; Control-technology; Engineering-controls; Explosion-prevention; Explosive-hazards
CAS No.
74-82-8
Publication Date
19630101
Document Type
Report of Investigations
Fiscal Year
1963
NTIS Accession No.
NTIS Price
Identifying No.
RI-6326
NIOSH Division
PRC
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 6326
State
WV; PA
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