Studies of stope-scale seismicity in a hard-rock mine. Part 1. Methods and factors.
Kranz RL; Coughlin JP; Billington S
Denver, CO: U.S. Department of the Interior, Bureau of Mines, RI 9525, 1994 Jan; :1-38
The U.S. Bureau of Mines (USBM) has been monitoring and studying seismic activity associated with mining in the Coeur d'Alene silver district of northern Idaho. The report deals with methodology and its limitations. The recent concept of fractals and their seismological use is discussed and applied to mining-induced seismicity. Three types of fractal studies are addressed: spatial analyses (including temporal changes of spatial patterns), temporal analyses, and size analyses. Other statistical measures of mine seismicity are also addressed: event mean location, inter-event distance distribution skewness, temporal coefficient of variation, nearest-neighbor and next event statistics, and event location planarity patterns. Each of the methodologies discussed (fractal and nonfractal) is presented using sample data from two stopes in the mine.
Seismic-waves; Seismic-events; Aftershocks; Rock-mechanics; Mechanical-properties; Mines-Excavation; Stope-mining; Rock-bursts; Seismicity; Mining-effects; Statistical-analysis
Report of Investigations
NTIS Accession No.
Denver, CO: U.S. Department of the Interior, Bureau of Mines, RI 9525