【摘要】 新疆阿舍勒铜矿矿体赋存比较浅,前期开采留下大量的采空区,随着矿山开采方法多样化,造成矿山地压活动突出。为预测预报800m中段以上和700m中段以下采空区活动,矿山建立了一套24通道微震监测系统,用多次测试爆破调试系统对事件的定位精度,最好精度达到7.1m。通过对微震事件活动性b值和微震体变势一阶差分的变化研究,分析震源能量变化,圈定能量集中区域,对矿山的地压灾害进行预测预报,为矿山安全生产提供了技术保障。更多还原

【Abstract】 In Ashele copper mine,Xinjiang,the buried depth of the orebody is shallower,there is a great deal of mined-out area due to the early mining.With the diversification of mining method,the mine pressure activities begin to aggravate.In order to monitor and predict ground pressure activities of mined-out areas above 800 m level and below 700 m level,a set of microseismic monitoring system with 24 channels was established in the mine.By monitoring microseismic events caused by blasting the monitoring system was debugged to improve the precision of positioning microseismic event,and the best accuracy reached to 7.1 meters.The b value of the activity of microseismic events and the first order difference of volume change potential changes of microseismic events were studied,the energy change of microseismic source was analyzed to confirm the energy-focused region and predict mine ground pressure disaster.It can provide a technical security for the mine safety in production.更多还原