摘要
某矿山构造应力较大且岩体硬度较大,发生岩爆风险可能性较高。基于微震监测技术,建设了符合矿山实际特点的地压监测系统,经过台网优化,监测系统定位误差在10 m左右,灵敏度在-2.6左右。分析了微震事件空间分布,划定采场西侧为潜在危险区域。并分析了危险区域内微震事件b值动态演化特征,得出b值可做为岩爆预警参量,b值迅速下降可作为岩爆前兆信息,成功预测岩爆发生,可为类似矿山安全生产管理提供一定的借鉴意义。
A ground pressure monitoring system is built using microseismic monitoring technology in view of the problems of large structural stress,large hardness of rock mass and high risk of rock burst in a mine.This is in line with the actual characteristics of the mine.The positioning error of the monitoring system is about 10 m and the sensitivity is about-2.6 after the optimization of the station network.The spatial distribution of microseismic events is analysed,and the potential dangerous area on the west side of the stope is demarcated.It is concluded that b-value can complete the rock burst early warning parameter,and the rapid decline of b-value can be used as the precursor information of rock burst by analysing the dynamic evolution characteristics of b-value of microseismic events in the dangerous area.This predicted the occurrence of rock burst successfully,and provided certain reference for the safety production management about similar mines.
作者
石峰
王平
蔡永顺
袁本胜
刘强
SHI Feng;WANG Ping;CAI Yongshun;YUAN Bensheng;LIU Qiang(BGRIMM Technology Group,Beijing 102628,China;China-South Africa Joint Research Center for Development and Utilization on Mineral Resources,Beijing 102628,China;National Centre for International Joint Research on Green Metal Mining,Beijing 102628,China)
出处
《中国矿业》
北大核心
2020年第S01期141-144,共4页
China Mining Magazine
基金
“十三五”国家重点研发计划资助(编号:2017YFC0602904)
矿冶科技集团有限公司青年科技创新基金资助(编号:04-1905)。
关键词
地压监测
微震
B值
预警
ground pressure monitoring
microseism
b-value
early warning
