采矿扰动下层析成像及微震多参数特征实例研究
Case study of microseismic tomography and multi-parameter characteristics under mining disturbances
董陇军 1闫先航 1王剑 1唐正1
作者信息
- 1. School of Resources and Safety Engineering,Central South University,Changsha 410083,China
- 折叠
摘要
采矿活动诱发的岩爆可引起矿区内强烈的振动和严重的岩石破坏.结合微震多参数、大震级事件分布与层析成像特征综合井下分析,综合为一种较好的预警方法.首先,在中国陕西某地下矿山建立了自主研发的微震监测系统.然后,根据层析成像计算结果得出了波速场异常与采矿活动区的关联模型,初步确定了可能存在风险的区域与采矿活动的特征.此外,对b值、S值、成像结果、大震级微震事件分布及陕西矿区795和860水平现场调查情况等多个因素进行了分析.根据该矿山6月7日岩爆案例,将795至860水平现场的多个区域进行对比分析,从工程角度发现了潜在的不安全区域,对安全施工管理提供了参考.微震监测系统可作为一个危险预警的手段,具有广泛的应用前景.
Abstract
Rockburst caused by mining disturbance may cause rock damage.Combining the microseismic(MS)multi-parameter,high-magnitude MS event distribution,and MS tomography may be an effective method for hazard precursor identification in underground mining.Firstly,a self-developed MS monitoring system was built in an underground mine in Shaanxi,China.Then,based on the tomography results,a correlation model was established between velocity anomalies and mining activity regions,and rockburst risk areas were delineated.Furthermore,multi-parameters were analyzed,including b value(rock fracture parameter),S value(MS activity),tomography results,high-magnitude MS event distribution and the in-site survey in 795 and 860 levels of Shaanxi Zhen-ao Mine.Ultimately,based on the rockburst case on June 7 and the multi-parameters analysis of 795 level to 860 level of Zhen-ao Mine,the risk areas were identified.MS information can be used as an early warning identification of hazards,and has a wide application in the future.
关键词
层析成像/微震多参数/微震事件/微震能量/采矿扰动Key words
seismic tomography/multi-parameters/microseismic event/microseismic energy/mining disturbances引用本文复制引用
基金项目
National Research and Development Program of China(2021YFC2900500)
International Cooperation and Exchange of the National Natural Science Foundation of China(52161135301)
出版年
2023
NETL
NSTL
维普
万方数据