摘要
针对矿山深部开采过程中易发生地压灾害的问题,基于微震监测技术,结合矿山实际特点建立深部岩体稳定性监测系统。优化台网设计,通过定点爆破进行波速校正,最终建立了定位误差在10 m,灵敏度在-2.2的监测台网。对监测数据进行波形拾取,分析微震事件时空演化特征,圈定潜在危险区域,并对潜在危险区域围岩变形损伤进行分析。最终总结出微震事件大幅度上升且处于较高水平、空间分布高度集聚、能量指数突然下降而累积视体积迅速上升的动力灾害预警前兆。研究结果可为深部开采岩体稳定性监测提供参考。
The monitoring system of rock mass stability was established based on the microseismic monitoring technology in view of the problem that the dynamic disaster of ground pressure was easy to occur in the process of deep mining.The design of the monitoring network was optimized,and the wave velocity was corrected by the method of fixed-point blasting.A monitoring network with a positioning error of 10 m and a sensitivity of-2.2 was established finally.The waveform of the monitoring data was picked up and the temporal-spatial evolution characteristics of microseismic events were analyzed,the potential dangerous areas were delineated,and the deformation and damage of the surrounding rock in the potential dangerous areas were analyzed.Finally,the early warning precursor of dynamic disaster was summarized,which is that the microseismic events increased greatly and in a high level,the spatial distribution was concentrated highly,the energy index suddenly dropped and the cumulative apparent volume increased rapidly.The research results can provide a reference for the stability investigation of deep mining rock mass.
作者
石峰
王平
蔡永顺
袁本胜
刘强
张丹
SHI Feng;WANG Ping;CAI Yongshun;YUAN Bensheng;LIU Qiang;ZHANG Dan(BGRIMM Technology Group,Beijing 100160,China;China-South Africa Joint Research Center for Development and Utilization on Mineral Resources,Beijing 102628,China;National Centre for International Research on Green Metal Mining,Beijing 102628,China;North China Institute of Science and Technology,Langfang 065201,China)
出处
《有色金属工程》
CAS
北大核心
2020年第8期113-118,共6页
Nonferrous Metals Engineering
基金
“十三五”国家重点研发计划项目(2017YFC0602904)
北京矿冶科技集团有限公司青年科技创新基金资助(04-1905)。
关键词
深部开采
岩体稳定性
微震监测
时空演化
预警前兆
deep mining
rock mass stability
microseismic monitoring
spatiotemporal evolution
early warning precursor
