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Microseismic Data Analysis of Failure Occurrence in a Deep, Western U.S. Coal Mine: A Case Study.

Authors
Kneisley-RO
Source
MISSING :16 pages
Link
NIOSHTIC No.
10006817
Abstract
Microseismic activity observed both in the laboratory and underground indicates that a quiet period, associated with the closure of existing fractures and strongly influenced by coal seam microstructure occurs prior to coal bumps. Field studies conclude that coal mine bumps occur against a background of this so-called microseismic calm. This Bureau of Mines report summarizes microseismic activity associated with face bumps and floor bursts in a deep, western U.S. coal mine. Results conclude that while bumps are often accompanied by panel-wide increases in microseismic activity, bumps are not only preceded by a localized decrease in activity, but occur within these quiet zones. The results of this study concluded that microseismic activity may be applicable to the global detection of potential bump-prone zones, but that future studies are necessary to confirm these findings and to improve the techniques for evaluating stress control effectiveness.
Publication Date
19890101
Document Type
IH; Report of Investigations;
Fiscal Year
1989
NTIS Accession No.
NTIS Price
Identifying No.
RI 9228
NIOSH Division
DRC;
Source Name
MISSING
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