Passive Seismic Imaging of Stress Evolution with Mining-Induced Seismicity at Hard-Rock Deep Mines

Details

• Personal Author:
  Counter D ; Ma X ; Malek F ; Slaker B ; Westman E
• Description:
  This work aims to examine the stress redistribution with evolving seismicity rates using a passive seismic tomographic tool. We compiled a total of 26,000 events from two underground mines and partitioned them into multiple clusters in a temporal sequence, each of which contains 1000 events. To image stress redistribution associated with seismicity rates, we then run the tomographic studies using each cluster to yield seismic tomograms and computed the corresponding seismicity rate. We found that high velocity anomalies grew with the increase of seismicity rates, and they switched to a shrinking tendency under low seismicity rates. Results of this study imply that seismicity rates increase with increasing stress concentration and decrease with decreasing stress concentration. This study highlights the value of utilizing passive seismic tomography for estimating stress evolution associated with the change of seismicity rates at underground mines. Our findings illuminate the applications of using mining-induced seismicity to assess stress redistribution associated with seismicity rates at hard-rock mines, providing insights into seismic hazards for deep mining. [Description provided by NIOSH]
• Subjects:
  Mining Occupational Health Safety
• Keywords:
  Author Keywords: Mining-induced Seismicity Geotechnical Engineering Ground Stability Mining Engineering Rock Mechanics Seismic Imaging Seismicity Rate Stress Evolution Underground Mines
• ISSN:
  0723-2632
• Document Type:
  Text
• Funding:
  Contract
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  53
• Issue:
  6
• NIOSHTIC Number:
  nn:20068416
• Citation:
  Rock Mech Rock Eng 2020 Jun; 53(6):2789-2894
• Contact Point Address:
  Xu Ma, Department of Mining and Minerals Engineering, Virginia Tech, Blacksburg, VA, 24060, USA
• Email:
  xuma@vt.edu
• Federal Fiscal Year:
  2020
• Performing Organization:
  Virginia Polytechnic Institute & State University
• Peer Reviewed:
  True
• Start Date:
  20110816
• Source Full Name:
  Rock Mechanics and Rock Engineering
• End Date:
  20160815
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:469fc605762d4bdc005d0aa3ba6d24a02a8592d2c85aa899ba090fd6ccb78bfd711be4684cb50a7aeba334f2b051d6e9aff139af106a949ef5b034aea6cc1883
• Download URL:
  https://stacks.cdc.gov/view/cdc/230572/cdc_230572_DS1.pdf
• File Type:
  [PDF - 6.41 MB ]