矿井瞬变电磁法探测非煤巷道岩层不整合界面  

Mine TEM for detecting unconformity interface of non-coal roadway rock stratum

作　　者：石学锋 SHI Xuefeng(Xi'an Research Institute ,China Coal Technology and Engineering Group, Xi'an 710077,China)

机构地区：[1]中煤科工集团西安研究院有限公司,西安710077

出　　处：《物探化探计算技术》2020年第4期510-516,共7页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家重点研发计划资助项目(2017YFC0804105)。

摘　　要：西部某煤矿处于大巷开拓阶段,巷道掘进过程中揭露寒武系地层有多处出水点,造成巷道底板大量积水。为保证巷道掘进施工安全,防止水害事故发生,采用矿井瞬变电磁法扇形探测技术对掘进工作面前方水文地质情况进行探查。对探测数据进行处理分析后,运用标准差标准化方法对深度校正后的视电阻率值进一步分析,处理结果表明巷道掘进前方存在低阻异常。标准化处理以后,岩层界面反映更为明显。根据物探成果,制定钻探方案,并对揭露的裂隙发育、导水区段等进行帷幕注浆堵截。综合钻探成果及掘进通过后现场查勘情况,异常区域存在岩层不整合剥蚀面。A coal mine in western China is in the development stage of the main roadway.During the roadway excavation process,there are many water outlet points in the Cambrian stratum,resulting in a large amount of water in the floor of the roadway.In order to ensure the safety of roadway excavation and prevent the occurrence of water damage accidents,the mine adopts the sector detection technology of mine transient electromagnetic method to explore the hydrogeological conditions in front of the tunneling face.After processing and analyzing the detected data,the apparent resistivity after depth correction is further analyzed by standard deviation standardization method.The results show that there is a low-resistance anomaly in front of the tunneling.After standardization,the rock formation interface is more obvious.According to the results of geophysical exploration,the mines formulated drilling plans and carried out curtain grouting interception on the exposed fracture development and water guiding sections.Based on the results of drilling and on-site investigation after tunneling,unconformity denudation surface of rock strata exists in the anomalous area.

关 键 词：瞬变电磁 超前探测 掘进工作面 富水区 标准化处理 

分 类 号：P631[天文地球—地质矿产勘探]