基于微震监测的地下采场稳定性分析  

Stability analysis of underground stope based on micro-seismic monitoring

作　　者：原新宇 李敏 苏凤波 许宏图 王奕仁 YUAN Xinyu;LI Min;SU Fengbo;XU Hongtu;WANG Yiren(Chifeng NFC Baiyinnuoer Mining Co.,Ltd.,Chifeng Inner Mongolia 025473,China;School of Civil Engineering and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]赤峰中色白音诺尔矿业有限公司,内蒙古赤峰025473 [2]北京科技大学土木与资源工程学院,北京100083

出　　处：《有色金属（矿山部分）》2024年第2期88-92,101,共6页NONFERROUS METALS(Mining Section）

摘　　要：微震监测技术已经成为深部地压研究和管理的一个基本手段。基于IMS微震监测系统,对中色白音诺尔铅锌矿地下采区采掘过程引起的岩体微破裂进行监测,可有效反映目标区域内采空区及生产作业采场的稳定性。数据分析表明:1)通过微震事件时空分布分析、b值法和能量指数EI、施密特数Scs与累计视体积CAV关系法,结合现场施工情况可更加准确地分析微震数据,有效评价地下采场的整体稳定性,得出合理结论;2)在EI降低的前提下,CAV曲线在拐点处斜率降低对应微震事件发生的概率或事件数较近前值降低,反之亦然;在Scs降低的前提下,无论CAV曲线在拐点处斜率增减,微震事件发生的概率或事件数较近前值均减小;3)该有色金属矿山地下采区大爆破余震事件发生频率显著降低,该生产采场稳定性较好。该系统的应用对中色白矿地下矿床开采中的防震减灾和安全生产将起到积极的作用。Micro-seismic monitoring technology has become a fundamental method for deep-ground pressure research and management.Based on the IMS micro-seismic monitoring system,the micro-fractures of rock mass caused by the mining process of Chifeng NFC Baiyinnuoer lead-zinc mine are monitored,it can accurately reflect the stability of the goafs and production operation stopes in the target areas.Data analysis shows that:1)By analyzing the spatiotemporal distribution of micro-seismic events,using b-value method and the methods of relationships between energy index(EI)and cumulative apparent volume(CAV),as well as Schmidt number(Sc s)and CAV,combined with on-site construction conditions,micro-seismic data can be more accurately analyze and the overall stability of underground mining sites can be evaluate effectively to draw reasonable conclusions;2)On the premise of EI decreases,the slip in slope of the CAV curve at the inflection points corresponds to an decrease in the probability of occurrence of micro-seismic events or the number of micro-seismic events compared to the last previous values,and vice versa;On the premise of Sc s decreases,regardless of the rise or fall in the slope of the CAV curve at the inflection points,the probability of occurrence of micro-seismic events or the number of micro-seismic events compared to the last previous values both decrease;3)The frequency of occurrence of aftershock events caused by large explosions in the underground mining area of this nonferrous metal mine has significantly decreased,a good stability of the production site could be demonstrated.The application of this system will play a positive role in earthquake prevention,disaster reduction,and safety production in the underground mining of Chifeng NFC Baiyinnuoer lead-zinc mine.

关 键 词：微震监测 时空分布 b值法 能量指数 施密特数 累计视体积 

分 类 号：TD853[矿业工程—金属矿开采]