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Mining Publication: Stress Measurements for Safety Decisions in Longwall Coal
Keywords: Horizontal stress Longwall mining Monitoring
This page is archived for historical purposes and is no longer being maintained or updated.
Original creation date: August 2002
Authors: EG Zahl, JP Dunford, MK Larson, TM Brady, J Chen
Conference Paper - August 2002
Download PDF Document (1.91 MB)
NIOSHTIC2 Number: 20025554
Proceedings of the 21st International Conference on Ground Control in Mining (Morgantown, WV, Aug. 6-8, 2002), Syd S. Peng, Christopher Mark, A. Wahab, and Keith Heasley, eds., WV University, Morgantown, WV, 2002 Aug; :45-52
Researchers at the Spokane Research Laboratory of the National Institute for Occupational Safety and Health, Spokane, WA, have collaborated with three Western longwall coal mines in an ongoing effort to develop technologies that will aid in providing safe and stable working areas. The goal of the research described here is to develop a stress monitoring system that will provide immediate information to mine managers for making daily safety decisions as areas of poor ground are mined through. Initial work has focused on answering preliminary questions regarding the reliability and use of stress change patterns. Research is concentrated on monitoring horizontal stress because horizontal stress is transmitted over long distances through stiff strata, thus allowing an extended length of entry to be monitored. This paper presents an explanation of the concept, key results from field tests at two mine sites, and a proposed process for implementing a monitoring system. System design layouts, instrument use, data collection and interpretation methods, and processes to present findings to mine staff are described. Additional validation and correlation with actual failure mechanisms are required before this approach can be recommended at ongoing operations. However, initial results indicate that this approach shows promise in mines prone to bumps and roof falls associated with large stress changes. In particular, analyses of measured changes in horizontal stresses appear useful.
Image of publication Stress Measurements for Safety Decisions in Longwall CoalConference Paper - August 2002
Download PDF Document (1.91 MB)
NIOSHTIC2 Number: 20025554
Proceedings of the 21st International Conference on Ground Control in Mining (Morgantown, WV, Aug. 6-8, 2002), Syd S. Peng, Christopher Mark, A. Wahab, and Keith Heasley, eds., WV University, Morgantown, WV, 2002 Aug; :45-52
See Also
AHSM - Analysis of Horizontal Stress Effects in Mining - 2.4.04
Analysis of Global and Local Stress Changes in a Longwall Gateroad
Degasification System Selection for U.S. Longwall Mines Using an Expert Classification System
Horizontal Stress and Longwall Headgate Ground Control
Modeling and Prediction of Ventilation Methane Emissions of U.S. Longwall Mines Using Supervised Artificial Neural Networks
Overview of Coal Mine Ground Control Issues in the Illinois Basin
Performance of Roof Support Under High Stress in a U.S. Coal Mine
Real-Time DPM Ambient Monitoring in Underground Mines
Reducing Noise-Induced Hearing Loss in Longwall Coal Mine Workers: NIOSH's Approach
Remote Monitoring of Mine Seismicity and Earthquakes Using Radio Telemetry, Computers, and the Internet
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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