Abstract

To find an effective numerical simulation method for microseismicity induced by deep mining activity, results obtained by using four simulation methods, namely: (1) the energy release rate method, based on Cook's study; (2) the strain energy release rate method, developed by the authors; (3) the volume excess shear stress index method, based on Spottiswoode's study; and (4) the maximum shear seismic moment release rate method, developed here by the authors; were compared with the microseismicity in a Japanese deep longwall coal mine. The maximum shear seismic moment release rate method was discovered to be the best method, since the intensity of microseismicity in a longwall coal panel, its variation with the face advance and the distribution of microseismic events were well simulated.

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