Details:

Personal Author:
Kneisley, R. O. (Richard O.) ;
Corporate Authors:
United States. Bureau of Mines. ;
Description:
"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." - NIOSHTIC-2 NIOSHTIC no. 10006817
Subject:
[+]
Coal Mine Accidents
Microseisms
Rock Bursts

Series:
Report of investigations (United States. Bureau of Mines) ; 9228;
Document Type:
Report ;
Place as Subject:
Pacific States ; Southwestern States ;
Pacific States ; Southwestern States ; Less -
Collection(s):
National Institute for Occupational Safety and Health
Main Document Checksum:
[+]
urn:sha256:9cf08e2be631bbb703c69dfe264a88b7c036588b784a693c9d1158e5f861ba06
File Type:

Supporting Files

• No Additional Files

More +