Mining Publication: Three-Dimensional Time-Lapse Velocity Tomography of an Underground Longwall Panel
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Original creation date: June 2008
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.
Authors: KD Luxbacher, EC Westman, PL Swanson, M Karafakis
Peer Reviewed Journal Article - June 2008
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
- Content source: National Institute for Occupational Safety and Health, Mining Program