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Evaluation of alternative placement of longwall gob gas ventholes for optimum performance.

Authors
Diamond-WP; Jeran-PW; Trevits-MA
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9500, 1994 Jan; :1-14
NIOSHTIC No.
10005159
Abstract
In this U.S. Bureau of Mines study, production trends have been analyzed for 82 gob gas ventholes on 7 longwall panels in the Lower Kittanning Coalbed, Pennsylvania. The variability of gas production from individual holes can be attributed to several factors, including completion practices and problems, the extent of fracture development in the strata above the extracted panel, water production, and location on the panel. Of particular significance is hole location. Holes on the ends of the panels, where overburden strata are in tension because of the support of the surrounding pillars, were generally the highest and longest producers.
Keywords
Methane; Mine-ventilation; Boreholes; Coal-mining; Mine-gases; Longwall-mining; Mine-safety; Mineral-industries
Publication Date
19940101
Document Type
Report of Investigations
Fiscal Year
1994
NTIS Accession No.
PB94-171949
NTIS Price
A03
Identifying No.
RI-9500
NIOSH Division
PRC
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9500
State
PA
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