物探与化探2024，Vol.48Issue(5)：1185-1192,8.DOI:10.11720/wtyht.2024.1065
巷道电性源瞬变电磁响应三维数值模拟
Three-dimensional numerical simulation of grounded-source transient electromagnetic responses in roadways
摘要
Abstract
Owing to the successful application of grounded-source in recent years,roadway detection using the grounded-source transi-ent electromagnetic(TEM)method has attracted significant academic interest.Using the three-dimensional finite-difference time-do-main(FDTD)method,this study simulated the grounded-source TEM responses of the anomalies in the roadway floors and between roadways.The simulation results are as follows:(1)For anomalies in the roadway floors,their surfaces show violent changes in the horizontal and vertical components of the electric field subjected to the surface charge of anomalies.The horizontal electric field exhibits a strong ability to discriminate low-resistivity bodies but a weak ability to discriminate high-resistivity bodies.The vertical electric field displays opposite response signs from the low-and high-resistivity bodies.The low-and high-resistivity bodies correspond to opposite ∂By/∂t responses in the early and late stages.Specifically,the response signs are negative in the early stage and positive in the late stage for low-resistivity bodies,whereas the results are contrary for high-resistivity bodies;(2)For anomalies between roadways,the horizontal electric field also exhibits a strong ability to discriminate low-resistivity bodies but a weak ability to discriminate high-resistiv-ity bodies.The ∂Bz/∂t response curves are above the background curves in the model of high-resistivity bodies but below the back-ground curves in the model of low-resistivity bodies,suggesting the discrimination ability of the ∂Bz/∂t response for both low-and high-resistivity bodies.关键词
电性源瞬变电磁响应/分辨能力/三维时域有限差分法/数值模拟Key words
grounded-source transient electromagnetic response/discrimination/three-dimensional finite-difference time-domain meth-od/numerical simulation分类
天文与地球科学引用本文复制引用
贾波,张富明,张利军,刘皓皓,郭亮亮,宋伟,张朝阳,何海龙,王刚..巷道电性源瞬变电磁响应三维数值模拟[J].物探与化探,2024,48(5):1185-1192,8.基金项目
侯村煤矿项目"整合关闭矿井资源回收前的探测分析与研究"(ZJSW2022072401D) （ZJSW2022072401D）
