基于微震监测单通道事件率倍比值的岩体垮塌预警研究  

Study on Rock Mass Collapse Early Warning Based on Single Channel Event Ratio of Microseismic Monitoring

作　　者：路洋 杨顺 刘禄平 LU Yang;YANG Shun;LIU Luping(Inner Mongolia Xingye group Rongguan Mining Co.,Ltd,Xilin Gol,Inner Mongolia 026000,China;Changsha Institute of Mining Research Co.,Ltd,Changsha,Hunan 410012,China;State Key Laboratory of Safety Technology for Metal Mine,Changsha,Hunan 410012,China)

机构地区：[1]内蒙古兴业集团融冠矿业有限公司,内蒙古锡林郭勒盟026000 [2]长沙矿山研究院有限责任公司,湖南长沙410012 [3]金属矿山安全技术国家重点实验室,湖南长沙410012

出　　处：《矿业研究与开发》2021年第12期72-75,共4页Mining Research and Development

摘　　要：针对矿山微震监测预警过程中,定位事件分析存在的技术难度大、准确度不高等问题,结合各区域不同的单通道事件率情况,引入单通道异常情况下的事件率与正常情况下的事件率比值,考虑初始施工扰动影响,动态调整单通道事件率预警指标。融冠矿业实际应用表明,当实际监测过程中单通道事件率倍比值超过预警值时,即会报警,且预警后出现岩体片帮垮塌。进一步分析发现,当单通道事件率倍比值超过预警值后,预示着围岩稳定性持续恶化,经历一个相对平静期后,岩体将会出现宏观开裂垮塌,这种单通道微震监测预报手段,能及时发现岩体的内部变化,可更好地实现有效监测预警。In view of the technical difficulty and low accuracy of location event analysis in the microseismic monitoring early warning of mine,combined with different single channel event rates in each region,the ratio of event rates under abnormal conditions to that under normal conditions was introduced,and the early warning index of single channel event rate was dynamically adjusted under the influence of initial construction disturbance.The practical application of Rongguan mining shows that when the multiple ratio of single channel event rate in monitoring process is higher than the early warning value,an alarm will be given.And the rock mass slope collapse will occur after the early warning.Through further analysis,it is found that when the multiple ratio of single channel event rate exceeds the early warning value,it indicates that the stability of surrounding rock continues to deteriorate.After a relatively quiet period,the rock mass will have macro cracking and collapse.This single channel microseismic monitoring and prediction method can timely find the internal change law of rock mass and better realize effective monitoring and early warning.

关 键 词：微震监测 单通道事件率 倍比值 岩体稳定性 预警 

分 类 号：TD76[矿业工程—矿井通风与安全]