Welcome to CDC Stacks | Studies of Stope-Scale Seismicity in a Hard-Rock Mine - Part 2: Characterization of Blast and Rock Burst Aftershock Sequences - 10249 | National Institute for Occupational Safety and Health
Stacks Logo
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.
 
 
Help
Clear All Simple Search
Advanced Search
Studies of Stope-Scale Seismicity in a Hard-Rock Mine - Part 2: Characterization of Blast and Rock Burst Aftershock Sequences
  • Published Date:
    1/1/2010
Filetype[PDF - 3.70 MB]


Details:
  • Description:
    Mining-induced microseismicity data collected by the U.S. Bureau of Mines in a hard-rock mine were analyzed for spatial and temporal patterns that might prove useful for prediction of rock bursts or assessment of rock mass damage changes. Pattern attributes described and illustrated in the previous report (part 1) were applied to the study of aftershock sequences associated with two different stopes. The aftershock sequences were spatially and temporally fractal, and the fractality was maintained for up to 16 h following a sequence progenitor. This suggests mechanical interdependency among the after-shocks. No statistical difference was found in the distributions of fractal dimensions when comparing two different stopes or when comparing aftershock sequences initiated by blasts or bumps. This suggests a lack of sensitivity to both stress perturbation mechanism and local damage states. However, differences between the two stopes were found in other sequence attributes that support inferred differences in the magnitude of stress concentrations and damage near each stope, and over time as a stope is developed.

  • Supporting Files:
    No Additional Files