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Mining Publication: A Correlation Between Seismic Tomography, Seismic Events and Support Pressure
Keywords: Seismic monitoring Weak rock
This page is archived for historical purposes and is no longer being maintained or updated.
Original creation date: July 2001
Authors: EC Westman, KA Heasley, PL Swanson, S Peterson
Conference Paper - July 2001
Download PDF Document (10.70 MB)
NIOSHTIC2 Number: 20021482
In: Elsworth D, Tinucci JP, Heasley KA, eds. Rock mechanics in the national interest, Proc 38th U.S. Rock Mechanics Symposium, Washington, DC, 2001 Jul; :319-326
Coal bumps are brittle, violent failures associated with high stresses and competent host strata. To study bump mechanisms, conditions in the vicinity of a deep longwall mining face in bump-prone strata were monitored using three discrete systems. First, a microseismic monitoring network recorded mining-induced seismic events throughout the mine and surrounding strata. Second, pressure variations and distributions on the longwall shield legs across the face were recorded. Last, tomography surveys imaged seismic transmission properties ahead of the face. Results from the three systems were correlated in an effort to increase understanding of mining-induced stress redistribution and bump potential. An initial, one-week study showed that the correlation between averaged tomogram values and seismically active areas had a coefficient of correlation (R) of 0.89. Further results of these studies demonstrate that the tomography system is capable of imaging heavy shield-leg loading and bump-prone conditions prior to them disrupting the face operations.
Image of publication A Correlation Between Seismic Tomography, Seismic Events and Support PressureConference Paper - July 2001
Download PDF Document (10.70 MB)
NIOSHTIC2 Number: 20021482
In: Elsworth D, Tinucci JP, Heasley KA, eds. Rock mechanics in the national interest, Proc 38th U.S. Rock Mechanics Symposium, Washington, DC, 2001 Jul; :319-326
See Also
An Analysis of Flexural Strength and Crack Width for Fiber-Reinforced Shotcrete Used in Weak Rock Mines
Detecting Strata Fracturing and Roof Failures from a Borehole Based Microseismic System
Development of an Automated PC-Network-Based Seismic Monitoring System
Diagnosing and Controlling Moisture-Sensitive Roof in Coal Mines
Local Earthquake Tomography for Imaging Mining-Induced Changes Within the Overburden above a Longwall Mine
Mapping Hazards with Microseismic Technology to Anticipate Roof Falls - A Case Study
The Relationship of Roof Movement and Strata-Induced Microseismic Emissions to Roof Falls
Safer Mine Layouts for Underground Stone Mines Subjected to Excessive Levels of Horizontal Stress
Seismic Event Data Acquisition and Processing: Distribution and Coordination Across PC-Based Networks
Time-Lapse Tomography of a Longwall Panel: A Comparison of Location Schemes
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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