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.

doi:10.16186/j.cnki.1673-9787.2021050068

Received:2021/05/17

Revised:2021/08/29

Published: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