Microseismic Source Locations: A Test of Faith

Details

• Personal Author:
  Billington S ; Boler FM ; Estey LH ; Swanson, Peter L.
• Description:
  High-resolution locations of microseismic events in mines would greatly augment the identification and mapping of geologic structures such as faults within the rock mass. Monitoring the movement and stress in the rock mass within the mining environment by microseismic analysis should aid in the understanding of rock bursting. Such monitoring by focal mechanism analysis is critically dependent upon high-resolution locations and accurate knowledge of the three-dimensional seismic velocity structure within the rock mass. The U.S. Bureau of Mines is developing methods for such quantitative characterization of deformation by studying a working hard-rock mine located in the Coeur d'Alene District of northern Idaho, which has discontinuous geologic structure. Routine locations of microseismic events in the mine at different stopes, based on arrival times of p-waves at different receivers, have been used to identify those stopes with a higher probability of bump or burst activity. As a result, a current research direction is the identification of those parameters and/or numerical procedures that affect the computed location of a given microseismic event. The parameters considered here are the receiver coordinates, arrival time picks, and velocity field model. Numerical procedures include the location technique (i.e., basis function and numerical algorithm) and associated procedures such as receiver weighting, arrival weighting, and screening procedures. [Description provided by NIOSH]
• Subjects:
  Engineering Mining Occupational Health Safety
• Keywords:
  Analytical-processes Environmental-control Environmental-engineering Environmental-stress Geology Ground-control Ground-stability Hard-rock-mines Mathematical-models Mining-industry Monitoring-systems Monitors Quantitative-analysis Rock-bursts Rock-falls Rock-mechanics Stress Structural-analysis Underground-mining Wave-propagation

  More +
• Series:
  Mining Publications
• ISBN:
  9789061911234
• Publisher:
  A.A. Balkema
• Document Type:
  Text
• Genre:
  Journal Article ; Proceedings
• Place as Subject:
  Colorado ; Idaho ; OSHA Region 10 ; OSHA Region 8
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DRC - Denver Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• NIOSHTIC Number:
  nn:10007719
• Citation:
  Rock mechanics: contributions and challenges: proceedings of the 31st U.S. Symposium, June 18-20, 1990, Colorado School of Mines, Golden, Colorado. Hustrulid WA, Johnson GA, eds. Brookfield, VT: A.A. Balkema, 1990 Jan; :939-946
• Editor(s):
  Hustrulid WA; Johnson GA
• Federal Fiscal Year:
  1990
• Peer Reviewed:
  False
• Source Full Name:
  Rock mechanics: contributions and challenges: proceedings of the 31st U.S. Symposium, June 18-20, 1990, Colorado School of Mines, Golden, Colorado
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:842917df3da615d00a92b471d4ea7019e47d2f63aff941ecea62f8ee5b9b8dfa944e5887051280728d664692673515800ac09b10e9845cb99d93fcb561013631
• Download URL:
  https://stacks.cdc.gov/view/cdc/219829/cdc_219829_DS1.pdf
• File Type:
  [PDF - 1.99 MB ]