地空瞬变电磁法在复杂地形运营公路隧道岩溶勘查中的应用——以广西河池—百色高速公路为例  

Application of Ground-airborne Transient Electromagnetic Method in Karst Exploration of Operational Highway Tunnels in Complex Terrain——Taking Hechi-Baise Highway in Guangxi,China as an Example

作　　者：孙乃泉[1,2] 李天祥 戚志鹏[1,2] 程旺盛[1,2] 曹华科 SUN Nai-quan;LI Tian-xiang;QI Zhi-peng;CHENG Wang-sheng;CAO Hua-ke(School of Geological Engineering and Geomatics,Chang'an University,Xi'an 710054,Shaanxi,China;Integrated Geophysical Simulation Lab(Key Laboratory of Chinese Geophysical Society),Chang'an University,Xi'an 710054,Shaanxi,China)

机构地区：[1]长安大学地质工程与测绘学院,陕西西安710054 [2]长安大学地球物理场多参数综合模拟实验室(中国地球物理学会重点实验室),陕西西安710054

出　　处：《地球科学与环境学报》2025年第1期95-105,共11页Journal of Earth Sciences and Environment

基　　金：国家重点研发计划项目(2021YFB2600400)。

摘　　要：针对传统地球物理方法在地形复杂条件下隧道突水突泥地质灾害勘查的局限性,采用结合地面与空中电磁信号的地空瞬变电磁法可以克服供电和负载的限制。以广西河池—百色高速公路金兰隧道为例,结合三维视电阻率成像技术,采用基于反函数原理的全域视电阻率计算方法,分析隧道区域三维视电阻率特征。该方法通过展示地下介质的电性分布,精确识别灾害源及导水通道,相比传统视电阻率计算,基于反函数原理的全域定义提升了探测的精度和深度。结果表明:地空瞬变电磁法结合全域视电阻率成像技术,能够精准定位隧道内的低电阻率区域,为隧道灾害抢险与治理提供了关键技术支持。To address the risks posed by water and mud inrush in operational tunnels,which significantly threaten traffic safety,a novel detection technology based on ground-airborne transient electromagnetic method(GATEM)is proposed.This method is designed to enhance the precision and efficiency of detecting hazard sources and water-conducting channels.To overcome these limitations,GATEM integrates ground and airborne electromagnetic signals,eliminating constraints related to power supply and load,making it particularly suitable for detecting complex mountainous regions and tunnels.GATEM is applied to Jinlan tunnel on Hechi-Baise highway,combining resistivity imaging technology with a full-domain apparent resistivity calculation method based on inverse functions for detailed analysis of the tunnel area.This approach accurately identifies geological hazard sources and water-conducting channels by mapping the electrical properties of subsurface media.Compared to traditional apparent resistivity calculations,the inverse function-based full-domain definition significantly improves detection accuracy and depth.The results show that GATEM combined with full-domain apparent resistivity imaging,precisely locates low-resistivity zones in tunnels,providing critical technical support for disaster prevention and mitigation.This method exhibits broad application potential in complex terrains,enhancing both the safety and efficiency of geological surveys and offering a novel solution for geohazard mitigation in tunnel engineering.

关 键 词：地空瞬变电磁法 复杂地形 岩溶勘查 隧道 地质灾害 全域视电阻率 

分 类 号：P631.3[天文地球—地质矿产勘探]