APPLICATION RESEARCH OF MICRO-SEISMIC MONITORING TECHNOLOGY TO GEOSTRESS HAZARDS IN DEEP MINING
TANG Shaohui1，PAN Yi1，HUANG Yinghua1，JI Xuewen2
(1. Safety Engineering Technology Research Center of Non-Coal Mine，Changsha Institute of Mining Research，Changsha，Hunan 410012，China；2. Yunnan Chihong Zn and Ge Co.，Ltd.，Qujing，Yunnan 654200，China)
Abstract：The 8th ore body of Huize mineral field is buried in depth of 1 000 m. The ore body exists in crush belt which is controlled by more than 10 faults with the complicated conditions. According to the actual situation during mining，digitalized 24-channel micro-seismic monitoring system was established，which has functions of seismology quantitative analysis and visualization interpretation. The composition and performance of micro-seismic monitor system were described. Using blasting to locate the accuracy of micro-seismic monitoring system for three tests，it is found that the source location error is the 3.16～6.78 m within the scope of monitoring，This result which are achieved from the expected aim proves that the monitoring system can supply monitoring requirements in mine ground pressure. The system has already been formally put into use in August 2007. On the basis of monitoring data in six months，the laws of the activities of ground pressure in 8th ore body are generally summed up after analyzing parameters，such as various characteristics of vibration waveforms，the time sequence characteristics of b value of micro-seismic events and the geostress drop parameters.
