摘要
深部高应力矿床开采爆破后的采场余震可用来评价采场围岩的稳定性，余震发震的时间、发震频度等是衡量采场围岩稳定性的重要指标。采用16通道全数字型微震监测系统对凡口铅锌矿深部采场大爆破后的余震事件进行实时和空间定位监测，确定余震事件发生的空间位置和发生时间。监测表明，采场大爆破有时不会诱发余震，有时会诱发余震，且这些余震发生在大爆破后的数分钟之内，30分钟之后没有余震发生，说明采场围岩体的稳定性较好。
Aftershocks of large blasts in mining stopes can be used to evaluate the stability of country rockmass around deep stopes with high stress. Occurring times and ratios of aftershocks are significant indices to judge the stability of country rockmass. Real-time and spatial location monitoring of aftershocks of large blasts by a 16-channel full-digital microseisimic monitoring system at deep mining stopes at Fankou Lead-zinc mine are carried out to determine the occurring times and the positions of the aftershocks. The monitoring results show that sometimes there are no aftershocks and sometimes aftershocks happen after large blasts. All the aftershocks, which occur after large blasts, take place within several minutes. If no events occur in 30 minutes after large blasts, it means the surrounding rockmass has a good stability.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第A01期4711-4714,共4页
Chinese Journal of Rock Mechanics and Engineering
基金
国家“十五”科技攻关项目（2001BA609A-09-02）
关键词
采矿工程
深部矿床
多通道微震监测
大爆破
余震
采场稳定性
mining engineering, deep mine
multi-channel microseismic monitoring, large blast
aftershock
stability of stopes
