深部地压条件下采场开采过程微震活动规律研究  

Study on Microseismic Activity Charactics During Exploitation Process of Deep Stope in Hongtoushan Copper Mine

作　　者：姜洪波 

机构地区：[1]中国有色集团抚顺红透山矿业有限公司,辽宁抚顺113321

出　　处：《有色矿冶》2016年第2期19-23,共5页Non-Ferrous Mining and Metallurgy

基　　金：中国有色矿业集团有限公司科技项目;红透山矿深部开采环境下采场顶板失稳活动规律及支护关键技术研究:项目编号2015KJJH05

摘　　要：针对红透山矿岩爆灾害日趋严重的问题,建立深部采场微震监测系统,对开采过程中微震时空活动规律进行了分析,并采用定量统计学参数分析,着重讨论了采场应力、变形分布规律。微震事件的能量指数可以反映视应力σA的大小,进一步反映微震发生区域内的应力水平。随着开采进行,27采场应力位移逐渐增大,开采至第七分层时,围岩应力集中程度得到缓解,位移明显增大,说明采场劣化现象严重,应谨防采场内部落石伤人,建议采取必要的支护措施。通过能量指数和位移分布云图,可以对岩体发生灾害的潜在危险区域进行判断,指导矿山支护管理,保证矿山安全高效生产。Considering more and more serious disaster of rock burst in Hongtoushan Copper, microseismic monitoring system for deep mining field was established to analyze the microseism spatiotemporal activity patterns in mining, then to discuss the regularities of stress distribution and deformation distribution through quantitative statistical parameters analysis. Apparent stress σA can be reflected by energy index of microseismic events, which can reveal the stress level in the corresponding region. The stress and displace- ment of rock surrounding 27 stope increased gradually with mining. When mining layer 7, the value of stress decreased and displacement increased obviously, which illustrated degradation of rock mass. There- fore, some necessary supporting measures should be adopted to protect the people from hurting by fallen rock. Potential danger areas of ground pressure disasters can be judged from the cloud charts of energy in- dex and displacement, which can be used to guide the safety management and ensure safety production in deep mine.

关 键 词：深部采场 地压 微震监测 能量指数 

分 类 号：TD676[矿业工程—矿山机电]