超高密度电法在煤矿底板水动态监测中的应用  

Application of ultra high density electrical technology in dynamic monitoring of coal mine floor water

作　　者：张钊 翟培合 刘宇翔 张同德 任科科 ZHANG Zhao;ZHAI Peihe;LIU Yuxiang;ZHANG Tongde;REN Keke(College of Earth Sciences&Engineering,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东科技大学地球科学与工程学院,山东青岛266590

出　　处：《煤矿安全》2021年第9期96-101,共6页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(41572244,51804184,41807283);山东省自然科学基金重点资助项目(ZR2020KE023)。

摘　　要：为提高煤矿开采过程中对底板水的监测能力,在现有的采场底板水监测系统的基础上进行改进。选用具有多通道数据采集和多装置数据联合反演的超高密度电法,最大程度上提高数据采集能力,提供更为丰富地质信息;反演过程中同时施加光滑约束与背景约束提高反演的稳定性,构造的反演方程引入正则化因子提高方程泛化能力,以此使反演效果更加精确。同时利用工作面巷道钻孔内埋设的电极、电缆,按一定的时间间隔进行监测获取不同时间工作面底板电阻率变化情况,以此推测地下体水运移情况;结合矿压周期变化及钻孔注浆资料分析底板水运移的原因,实现煤矿回采过程中底板水的动态监测。In order to improve the monitoring ability of floor water during the mining process, the existing mining floor water monitoring system is improved. The ultra-high density resistivity method with multi-channel data acquisition and multi-device data joint inversion is selected to maximize the data acquisition ability and provide more abundant geological information. During the inversion process, smooth and background constraints are applied simultaneously to improve the stability of the inversion. The inversion equation is constructed to introduce a regularization factor to improve the generalization ability of the equation. At the same time, the electrodes and cables buried in the working face roadway boreholes are monitored at a certain interval to obtain the changes in resistivity of the working floor water at different time, and then to obtain the underground water movement. Combined with the periodic change of mine pressure and drilling grouting data, the paper analyzes the reasons of floor water movement,realizes the dynamic monitoring of floor water in the process of coal mining.

关 键 词：超高密度电法 动态监测 正则化 广义最小二乘法 跨孔电阻率成像 

分 类 号：TD745[矿业工程—矿井通风与安全]