pure and applied geophysics

, Volume 129, Issue 3–4, pp 423–453 | Cite as

Induced seismicity in mines in Canada—An overview

  • Henry S. Hasegawa
  • Robert J. Wetmiller
  • Don J. Gendzwill
Article

Abstract

Monitoring of mine-induced seismicity in Canada has improved with the expansion of regional seismograph networks into areas of active mining. However, the severity, and in some cases the frequency, of mine-induced tremors has increased as mining extends to greater depths and at accelerated rates of extraction. Because of the complex design and large areal extent of many mines (potash, coal and metalliferous), the most feasible and practical way to monitor these tremors at the present time is to deploy a network of seismometers in and on the surface above mines experiencing microearthquake activity. A few of these mines already have a network of seismometers deployed around them and plans are under way to deploy seismograph networks around other mines that have experienced some rather severe tremors in recent times. Six possible mechanisms for mine-induced tremors are described and the associatedP- andS-wave radiation patterns presented. A comparison of actual seismic radiation patterns with theoretical predictions is a quick way to diagnose the potential source mechanisms. In addition, recognizing the pattern of microearthquake activity preceding larger tremors can be used to mitigate the potential effects of severe tremors.

Key words

Elastic effects inelastic after-effects monitor seismicity mitigate hazards 

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Copyright information

© Birkhäuser Verlag 1989

Authors and Affiliations

  • Henry S. Hasegawa
    • 1
  • Robert J. Wetmiller
    • 1
  • Don J. Gendzwill
    • 2
  1. 1.Geophysics DivisionGeological Survey of Canada, Energy, Mines and ResourcesOttawaCanada
  2. 2.Department of Geological SciencesUniversity of SaskatchewanSaskatoonCanada

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