吴荣新, 姜寒阳, 欧元超,等.地形影响下溶洞电法探查数值模拟分析[J].河南理工大学学报（自然科学版）,2023,42(4):55-63.

WU R X, JIANG H Y, OU Y C,et al.Numerical simulation analysis of karst cave electrical exploration under the influence of topography[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(4):55-63.

地形影响下溶洞电法探查数值模拟分析

吴荣新1, 姜寒阳1, 欧元超1, 谭磊2

1.安徽理工大学 地球与环境学院，安徽 淮南  232000;2.浙江广川工程咨询有限公司，浙江 杭州  310020

摘要:为探究各类地形条件下不同充填程度溶洞的地电响应特征与变化规律，构建5类地形条件下3种不同充填程度溶洞的地电模型，分析地形起伏、溶洞充填、埋深改变时数值模拟结果的差异与变化。结果表明：不同地形起伏的各类溶洞，平地、山顶、山谷和山脚地形下高密度电阻率法探测结果相近，地形影响较小，山坡地形下模型探测结果较差，地形影响较大；随着埋深增加，全充填溶洞的探测不受影响，未充填和半充填溶洞地电模型的异常体中心向上偏移，异常响应范围普遍大于实际范围，且未充填溶洞的异常响应范围更接近实际范围，误差相对较小。研究结果可为山区高密度电阻率法溶洞空间发育精准探测提供指导。

关键词:高密度电阻率法;数值模拟;地形起伏;溶洞;充填;埋深

doi:10.16186/j.cnki.1673-9787.2021050068

基金项目:国家重点研发计划项目（2016YFC0600900）

收稿日期:2021/05/17

修回日期:2021/08/29

出版日期:2023/07/25

Numerical simulation analysis of karst cave electrical exploration under the influence of topography

WU Rongxin1, JIANG Hanyang1, OU Yuanchao1, TAN Lei2

1.School of Earth and Environment，Anhui University of Science and Technology，Huainan  232000，Anhui，China;2.Zhejiang Guangchuan Engineering Consulting Co.，Ltd.，Hangzhou  310020，Zhejiang，China

Abstract:In order to systematically analyze and summarize the different characteristics and variation rules of geoelectric response of different filled karst caves under various terrain conditions，three geoelectric models of karst caves with different filling degrees under five terrain conditions were constructed，and the numerical simulation results and differential variation characteristics were analyzed when the terrain，karst cave filling and buried depth changed.The research showed that the detection results of mountain top，mountain foot，valley and underground karst cave models were similar，and the topographic influence was small.The detection results of models under hillside terrain were poor，and the topographic influence was large；With the increase of buried depth，the detection of fully filled karst cave would not be affected.The abnormal body center of unfilled and semi filled karst cave geoelectric model shifted upward，and the abnormal response range was generally greater than its actual range.However，the offset distance of the abnormal center of the two was similar，the abnormal response range of the former was closer to the actual range，and the error was relatively small.The research results provided scientific guidance for the accurate detection of karst cave spatial development by high-density resistivity method in mountainous areas.

Key words:high density resistivity method;numerical simulation;topographic relief;karst cave;filling;buried depth

地形影响下溶洞电法探查数值模拟分析_吴荣新.pdf