New approaches to studying rock burst-associated seismicity in mines.
Rock Mech as a Multidisciplinary Sci: Proceeds 32nd U S Symp Balkema, :491-500
The U.S. Bureau of Mines is using several new promising techniques to study the spatial and temporal patterns of microseismicity associated with active stope mining before and after rock bursts. Data from two stopes that have suffered rock bursts in a silver- copper mine in northern Idaho are used to illustrate these techniques. One technique involves analyzing the degree of clustering of the event location pattern. The degree of spatial clustering, measured by the fractal dimension, changes before and after a rock burst for the stopes studied. The same technique can be applied to the postburst time intervals between all event pairs and also shows the fractal nature of the seismicity. Another technique displays the time and space context of individual events by grouping events according to the patterns of triggered stations. Finally, another technique searches for planarity in the microseismic event locations.
OP; Conference/Symposia Proceedings
Rock Mech as a Multidisciplinary Sci: Proceeds 32nd U S Symp