拖曳式瞬变电磁法在防空洞精细探测中的应用研究  

Application of towed transient electromagnetic method in fine detection of air-raid shelter

作　　者：刘蔚 徐正玉 杨超 吴牧阳 胡绪权 付能翼 付志红[2] LIU Wei;XU ZhengYu;YANG Chao;WU MuYang;HU XuQuan;FU NengYi;FU ZhiHong(Chongqing Electric Power Research Institute,State Grid Chongqing Electric Power Co.,Chongqing 401123,China;School of Electrical Engineering,Chongqing University,Chongqing 400044,China;Chongqing Triloop Prospecting Technology Co.,Ltd.,Chongqing 402660,China)

机构地区：[1]国网重庆市电力公司电力科学研究院,重庆401123 [2]重庆大学电气工程学院,重庆400044 [3]重庆璀陆探测技术有限公司,重庆402660

出　　处：《地球物理学进展》2024年第3期1260-1274,共15页Progress in Geophysics

基　　金：国家电网公司总部科技项目“油浸式电力设备绝缘聚合度及老化标志物的现场快速检测方法及系统研发”(5108-202218280A-2-361-XG);江苏省航空对地探测与智能感知工程中心开放基金(JSECF2023-16);中央高校基本科研业务费(2023CDJXY-029);重庆市自然科学基金项目(CSTB2023NSCQ-MSX0449)联合资助。

摘　　要：防空洞等人防工程通常分布于城区之中,受场地,道路及周边电磁环境干扰等影响,常规地球物理方法施工困难.瞬变电磁法具有施工方便,效率高的特点,在城市地下空间探测中有广泛应用前景.本文将拖曳式瞬变电磁法应用到地下防空洞精细探测中,从理论与应用两个方面进行探讨分析.首先,建立三维防空洞异常体模型,采用有限差分数值方法模拟瞬变电磁场三分量传播规律,分析了单异常体和多异常体响应特征规律;其次,在数据处理方法上,采用萤火虫非线性优化算法进行反演计算.建立理论层状模型和二维理论模型进行反演计算,研究结果表明,萤火虫优化算法能较好的反映出层状和防空洞模型分布情况.最后,将拖曳式瞬变电磁法应用于郑州市地下防空洞调查中.将反演成像结果与已知资料进行对比分析,表明该方法能反映出防空洞分布情况,异常分辨能力强.研究工作为地下人防工程及病害体精细探测提供高效精准的方法与技术.Civil defense projects such as air-raid shelters are usually distributed in urban areas.Affected by venues,roads,and peripheral electromagnetic environment interference and the construction of conventional geophysical methods is difficult.The Transient Electromagnetic Method(TEM) has convenient construction and high efficiency and has widely used prospects in urban underground space detection.The towed transient electromagnetic method was applied to fine detection of underground air-raid shelter in this paper and discusses analysis from the two aspects:theory and application.Firstly,a three-dimensional model of the abnormal body of the air-raid shelter is established,and the three-component propagation law of the transient electromagnetic field is simulated by finite difference numerical method,and the response characteristics of the single abnormal body and multiple abnormal bodies are analyzed.Secondly,in the data processing method,the nonlinear optimization algorithm of the firefly algorithm is used for inversion calculation.The theoretical layered model and twodimensional theoretical model were established for inversion calculation.The results show that the firefly optimization algorithm can better reflect the distribution of layered and bomb shelter models.Finally,the towed TEM is applied to the investigation of the Zhengzhou underground air-raid shelter.The results of inversion imaging are compared with the known data.The results show that this method can reflect the distribution of air raid shelters and has a strong ability to distinguish anomalies.The research work provides professional and efficient methods and technologies for underground civil air defense engineering and fine detection of disease bodies.

关 键 词：拖曳式瞬变电磁法 理论模拟 防空洞 萤火虫算法 精细探测 

分 类 号：P631[天文地球—地质矿产勘探]