深井矿山地压灾害微震监测技术应用研究

 会泽矿区深部8号矿体埋藏深度达1 000 m，矿体赋存于十余条断层所控制的破碎带中，开采条件十分复杂。根据矿山实际情况，建立一套具有地震学定量分析和可视化解释功能的数字化24通道微震监测系统。详细介绍微震监测系统的组成和性能，采用人工爆破震源对微震监测系统的定位精度进行3次测试，监测范围内的震源定位误差为3.16～6.78 m，达到预期目的，证明该监测系统可满足矿山地压监测要求。该系统于2007年8月正式投入使用，在半年监测数据的基础上，通过对井下采集的多种振动波形特征、微震事件b值时序特征及震源应力降等参数进行分析，初步总结深部8号矿体开采过程中的地压活动规律。

APPLICATION RESEARCH OF MICRO-SEISMIC MONITORING TECHNOLOGY TO GEOSTRESS HAZARDS IN DEEP MINING

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.