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Hydraulic stimulation increases degasification rate of coalbeds.

Authors
Elder-CH; Deul-M
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 8047, 1975 Jan; :1-17
NIOSHTIC No.
10000668
Abstract
Coal degasification boreholes drilled from the surface have been successfully hydraulically stimulated to increase the flow of gas from the coal. This Bureau of Mines report describes the hydraulic stimulation procedure for a coalbed, the equipment required, and design criteria for the treatment. Three examples of stimulation treatment show from fivefold to twentyfold increases in gas production. The tests were conducted in the Pocahontas No. 3 Coalbed, Buchanan County, Virginia, the Pittsburgh coalbed, Washington County, Pennsylvania, and the Mary Lee coalbed, Jefferson County, Alabama. Two sites where the coal was hydraulically stimulated and exposed by subsequent mining show no adverse effect on mining operations through the treated zones. The induced vertical partings were confined to the coalbed and did not in any way affect either roof or floor rock.
Keywords
Mine-gases; Mining-industry; Methanes; Methane-drainage; Methane-control; Explosive-gases; Explosive-atmospheres; Underground-mining; Coal-mining; Control-technology; Engineering-controls
CAS No.
74-82-8
Publication Date
19750101
Document Type
IH; Report of Investigations
Fiscal Year
1975
NTIS Accession No.
PB-242735
NTIS Price
A03
Identifying No.
RI-8047
NIOSH Division
PRC
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 8047
State
AL; PA; VA; WA
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