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Peak methane concentrations during coal mining, an analysis.

Authors
Kissell-FN; Banfield-JL Jr.; Dalzell-RW; Zabetakis-MG
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 7885, 1974 Jan; :1-17
NIOSHTIC No.
10000617
Abstract
Methane concentration peaks were measured by the Bureau of Mines at coal mine working faces during entry development. The statistical distribution of peaks was found to be normal or log normal depending on how well the methane was being mixed into the ventilation airstream. A normal distribution indicated good mixing, whereas a log-normal distribution indicated that mixing was poor. In addition, the "highest" peaks over selected intervals were found to fit a type I extreme-value distribution, a result similar to that obtained while mining longwall faces.
Keywords
Mine-gases; Mining-industry; Methanes; Methane-drainage; Methane-control; Explosive-gases; Explosive-atmospheres; Underground-mining; Coal-mining; Control-technology; Engineering-controls
Publication Date
19740101
Document Type
IH; Report of Investigations
Fiscal Year
1974
NTIS Accession No.
PB-233424
NTIS Price
A03
Identifying No.
RI-7885
NIOSH Division
PRC
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 7885
State
PA
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