Time-Lapse Passive Seismic Velocity Tomography of Longwall Coal Mines: A Comparison of Methods

Details

• Personal Author:
  Luxbacher, Kray D. ; Schafrik SJ ; Swanson PI ; Westman EC ; Zhang H
• Description:
  Bumps in underground coal mines are violent events that result from a buildup of stress, usually in mines underlain and overlain by massive strata. Seismic velocity tomography can be implemented to infer stress distribution at mines and determine when a dangerous situation is developing. Three different methods were employed to compare time-lapse passive seismic tomograms at a longwall coal mine. The dataset is well sampled with a dense receiver array. Parameterization and results were compared using GeoTom, TomoDD, and SIMULPS. TomoDD and SIMULPS both allow for variable gridding and relocation of microseismic events while GeoTOM does not. All three methods produced consistent results for the data set showing clear high velocity zones in areas where abutment stress is expected and low velocity zones corresponding with gob. TomoDD proved to be the most suitable method for generating tomograms from mining-induced microseismic events because it resulted in the most consistent images and the calculated velocity distribution matched prior stress distribution measurements at the site. [Description provided by NIOSH]
• Subjects:
  Coal Mining Occupational Health Safety
• Keywords:
  Analytical-instruments Analytical-models Analytical-processes Coal-mining Geology Ground-control Ground-stability Hard-rock-mines Longwall-mining Mathematical-models Mining-industry Models Rock-bursts Rock-mechanics Safety-research Simulation-methods Structural-analysis Underground-mining

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• Series:
  Mining Publications
• ISBN:
  9781622765140
• Publisher:
  American Rock Mechanics Association (ARMA)
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  Illinois ; OSHA Region 10 ; OSHA Region 3 ; OSHA Region 5 ; Virginia ; Washington
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  OMSHR - Office of Mine Safety and Health Research
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  1
• NIOSHTIC Number:
  nn:20042191
• Citation:
  46th US Rock Mechanics/Geomechanics Symposium, June 24-27, 2012, Chicago, Illinois. Alexandria, VA: American Rock Mechanics Association (ARMA), paper no. ARMA 12-589, 2012 Jun; 1:602-607
• Contact Point Address:
  E. C. Westman, Mining and Mineral Engineering Department, VirginiaTech., Blacksburg, VA, USA
• Federal Fiscal Year:
  2012
• NORA Priority Area:
  Mining
• Peer Reviewed:
  False
• Source Full Name:
  46th US Rock Mechanics/Geomechanics Symposium, June 24-27, 2012, Chicago, Illinois
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:5009d415be27420b19442df39ce320158f110903a374ae476a26f045670efa268d21dbffbc3c962ac6a61d4428542c71e98540984a91d7fe8e38f8914b198987
• Download URL:
  https://stacks.cdc.gov/view/cdc/227529/cdc_227529_DS1.pdf
• File Type:
  [PDF - 593.50 KB ]