Abstract:Dongguashan Copper Mine is one of the deepest metal mines in China presently,where the rocks are typically burst-prone. In order to better understand the regularities of rockburst occurrence,an ISS microseismic monitoring system manufactured in South Africa was installed in Dongguashan Copper Mine in August,2005. The positioning accuracy of the system has been adjusted according to the blasting test,by which the real-time monitoring stress state of rock mass corresponding to mining is realized. The composition and layout of the monitoring system in Dongguashan Copper Mine are briefly described. Based on analyzing the seismic events in the last two years,the process of different shapes of microseismic event waveforms has been studied. Comparative location results from automatic processing and artificial processing have also been made. In terms of the corresponding relations between recorded waveforms and practical mining,the event waveforms were assorted,which will ensure events timely being identified and stored according to their characteristics. Based on quantized microseismic parameters,especially using the corresponding relations between contour line,regression curve,time history and mining practices,the microseismic events occurring during the three months from August 2006 are primarily analyzed;and the failure mechanism of the rib pillar at exploration line 54 is also studied. The results indicate that rock mass stiffness gradually increases first and then declines;rock mass stresses decline from normal level and then raise sharply;the seismic activity and cumulative apparent volume increase rapidly before the large scale failures of rock mass. This provides a new approach for the study of failure mechanism of mining structure and the damage prediction.