某矿山典型断层区域微震事件活动特征研究  

Research on the characteristics of microseismic events in typical fault areas in a mine

作　　者：王玺 王剑波 赵杰 刘兴全 尹延天 Wang Xi;Wang Jianbo;Zhao Jie;Liu Xingquan;Yin Yantian(Deep Mining Laboratory Branch of Shandong Gold Mining Technology Co.,Ltd.)

机构地区：[1]山东黄金矿业科技有限公司深井开采实验室分公司

出　　处：《黄金》2021年第2期30-35,47,共7页Gold

摘　　要：应用地球物理学的方法,基于微震数据反演分析了岩体破裂特征和断层滑移特征。矩张量反演分析可以清晰地表达震源处受力情况,且应用矩张量分解可以探知震源的破裂面产状及震源的破裂类型。应用矩张量反演分析方法,对某矿山震级大于-0.50的微震大事件进行识别。以偏量部分大于60%为分类原则,分离出岩体剪切滑移型微震事件,并根据微震事件断层面解,绘制了岩体破裂面方位玫瑰图。结果显示:F 310断层活动频繁、微震事件震级相对较大,且岩体破裂面方位以NEE—SWW为主。矿区W9勘探线至W11勘探线为微震事件高发区。F 350断层相对稳定,但该断层与矿体相切,增大回采和开拓工作量时,应密切注意断层周边的微震事件活动。The paper applied geophysical methods to analyze rock mass fracture and fault slippage characteristics based on microseismic data inversion.Moment tensor inversion analysis can clearly describe the stress status at the seismic source and the application of moment tensor decomposing can explore the seismic source fracture face occurrence and the seismic source fracture pattern.The moment tensor inversion analysis method is applied to indentify microseismic events greater than-0.5 magnitude in a mine.The microseismic events of the rock shear-slip failure type are classified with DEV greater than 60%as the classification principle,and the rose diagram of the rock mass fracture face orientation is mapped according to the fault plane solutions.The result shows that for the F 310 fault,activities are frequent,the magnitude of microseismic events is relatively great,and the rock mass fracture face orientation is dominated by NEE-SWW.There is a frequent microseismic event area in the mine between the W9 and W11 lines.The F 350 fault is relatively stable,but it is tangent to the ore body,so the stoping and development workload increases.Attentions should be paid to the microseismic events and activities surrounding the fault.

关 键 词：地球物理学 微震监测 震源机制 断层滑移 矩张量反演 

分 类 号：TD32[矿业工程—矿井建设]