地质与勘探2025，Vol.61Issue(5)：1016-1024,9.DOI:10.12134/j.dzykt.2025.05.012
等值反磁通技术在帷幕检测中的应用研究
Application of the Opposing Coils Transient Electromagnetic Method in Curtain Detection
摘要
Abstract
The detection of seepage in grouting curtains is a critical step in ensuring the quality assessment of their anti-seepage performance.To address the limitations of traditional hydrogeological investigation methods in terms of detection accuracy,depth,and spatial resolution,this study innovatively introduces high-precision geophysical detection technology into confined underground spaces.By employing the opposing-coil transient electromagnetic method(OCTEM)independently developed by Central South University,the unique counter magnetic flux coil design effectively overcomes primary field interference,and significantly improves the detection resolution of shallow low-resistivity geological bodies.This research systematically elaborates on the electromagnetic field propagation mechanism of the OCTEM method,establishes an optimized deployment scheme for the HPTEM-28 detection system suitable for underground environments,and develops a complete technical workflow encompassing data preprocessing,inversion computation,and geological interpretation.Field tests conducted on the grouting curtain at the Maoping lead-zinc mine in Yunnan Province demonstrate that the system successfully identifies a continuous low-resistivity anomaly zone at depths of 110～160 m within a 500 m detection range.Multi-source validation using borehole core data and water inflow measurements confirms that this anomaly corresponds to a fault fracture zone constituting a potential seepage channel.This technology achieves precise identification and localization of hidden quality defects in deep underground engineering,which will provide a novel technical solution for evaluating curtain integrity and controlling water hazards in mining,tunneling,and similar projects.It holds significant engineering application value and promising prospects for broader adoption.关键词
瞬变电磁/止水帷幕/等值反磁通瞬变电磁法/HPTEM-28/数据解译Key words
transient electromagnetic method/curtain of water blockage/OCTEM/HPTEM-28/data interpretation分类
天文与地球科学引用本文复制引用
马超,胡其全,张俊平,李栋,孙贵远,谢鸿哲,杨紫文,高新宇..等值反磁通技术在帷幕检测中的应用研究[J].地质与勘探,2025,61(5):1016-1024,9.基金项目
中国铜业科技项目(编号:202403CHYCJSZX06)资助. （编号:202403CHYCJSZX06）
