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。
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 aggra- vate. 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 chan- nels was established in the mine. By monitoring microseismic events caused by blasting the monitoring system was de- bugged 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 micro- seismic 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 pro- vide a technical security for the mine safety in production.
出处
《矿业研究与开发》
CAS
北大核心
2013年第3期58-63,共6页
Mining Research and Development
基金
湖南省重大科技专项(2011FJ1003)
关键词
地压灾害
微震监测
微震事件
震源能量
Ground pressure disaster, Microseismic monito ring, Microseismic events, Energy of microseismie source
