OPTIMIZATION OF MICROSEISMIC MONITORING NETWORK FOR LARGE-SCALE DEEP WELL MINING
大规模深井开采微震监测系统站网布置优化

Dongguashan Copper Mine is the deepest metal mine which has strong rockburst hazard in China. A microseismic monitoring system is established to monitor and predict rockbursts in real time in the mine. Therefore, the optimization of distribution of microseismic network is carried out. The characteristics of rockburst distribution caused by simultaneous excavation of multi-panel and multi-stope are analyzed to determine the monitoring area. Many schemes of distributions of microseismic networks are designed in terms of the monitoring area, the underground drifts and technical characteristics of the seismic monitoring system in the mine. The errors of source location and system sensitivities associated with these schemes are calculated. The optimum distribution of the microseismic network is gotten by synthetic analysis of the calculation results, engineering conditions and economical efficiency. After the system is established, some in-situ tests are made to measure the errors and sensitivities, and the results confirm that the optimum distribution meets the requirement of seismic monitoring in the mine, and the monitoring data are reliable and valid.