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Mining Publication: Three-Dimensional Time-Lapse Velocity Tomography of an Underground Longwall Panel

June 2008

Image of publication Three-Dimensional Time-Lapse Velocity Tomography of an Underground Longwall Panel

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 ArticleJune - 2008

  • Adobe Acrobat - Portable Document Format (.PDF)

    2.08 MB

NIOSHTIC2 Number: 20033836

Int J Rock Mech Min Sci 2008 Jun; 45(4):478-485

 
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