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Mining Publication: Three-Dimensional Time-Lapse Velocity Tomography of an Underground Longwall Panel
Keywords: Geophones Ground falls Horizontal stress Longwall panels Seismic monitoring
Original creation date: June 2008
Authors: KD Luxbacher, EC Westman, PL Swanson, M Karafakis
Peer Reviewed Journal Article - June 2008
Download PDF Document (2.08 MB)
NIOSHTIC2 Number: 20033836
Int J Rock Mech Min Sci 2008 Jun; 45(4):478-485
Three-dimensional velocity tomograms were generated to image the stress redistribution around an underground coal longwall panel to produce a better understanding of the mechanisms that lead to ground failure, especially rockbursts. Mining-induced microseismic events provided passive sources for the three-dimensional velocity tomography. Surface-mounted geophones monitored microseismic activity for 18 days. Eighteen tomograms were generated and high-velocity regions correlated with high abutment stresses predicted by numerical modeling. Additionally, the high-velocity regions were observed to redistribute as the longwall face retreated, indicating that velocity tomography may be an appropriate technology for monitoring stress redistribution in underground mines.
Image of publication Three-Dimensional Time-Lapse Velocity Tomography of an Underground Longwall PanelPeer Reviewed Journal Article - June 2008
Download PDF Document (2.08 MB)
NIOSHTIC2 Number: 20033836
Int J Rock Mech Min Sci 2008 Jun; 45(4):478-485
See Also
Analysis and Prediction of Longwall Methane Emissions: A Case Study in the Pocahontas No. 3 Coalbed, VA
Calibration and Verification of Longwall Stress Models
Coal Mine Safety Applications of Seismic Monitoring
Detecting Strata Fracturing and Roof Failures from a Borehole Based Microseismic System
Elastic and Shear Moduli of Coal Measure Rocks Derived from Basic Well Logs Using Fractal Statistics and Radial Basis Functions
Safer Mine Layouts for Underground Stone Mines Subjected to Excessive Levels of Horizontal Stress
Seismic Detection of Trapped Miners Using In-Mine Geophones
Stochastic Modeling of Gob Gas Venthole Production Performances in Active and Completed Longwall Panels of Coal Mines
Temporal Imaging of Mine-Induced Stress Change Using Seismic Tomography
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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