物探与化探2024，Vol.48Issue(5)：1176-1184,9.DOI:10.11720/wtyht.2024.1300
煤矿富水体SOTEM响应三维数值模拟研究
Three-dimensional numerical simulation of short-offset transient electromagnetic responses to water-rich bodies in coal mines
摘要
Abstract
This study performed forward modeling for the short-offset transient electromagnetic(SOTEM)responses of a three-dimen-sional geoelectric model using the three-dimensional finite-difference time-domain method.The results reveal that:(1)The attenuation curves of the Ex responses from the electric field above the goaf or collapse column were above the background response curve at early times but below it at later times;(2)A shorter offset corresponded to a higher relative anomaly of ∂Bz/∂t response signals.Increasing the length of the transmitting source could enhance the signal intensity while slightly decreasing the relative anomaly;(3)In the case of survey lines close to the transmitting source,the overall ∂Bz/∂t responses of the goaf or collapse column were weaker than the back-ground responses.For survey lines away from the transmitting source,the overall ∂Bz/∂t responses of the goaf or collapse column were stronger than the background responses.In summary,the calculation results demonstrate significant implications for understanding the ability of the SOTEM method to detect typical water-rich bodies in coal mines,laying a theoretical foundation for the parameter selection of SOTEM devices and their generalized application in the coal sector.关键词
煤矿积水采空区/含水陷落柱/SOTEM响应/三维数值模拟Key words
waterlogged goaf in a coal mine/water-bearing collapse column/SOTEM response/three-dimensional numerical simula-tion分类
天文与地球科学引用本文复制引用
常江浩,薛俊杰,孟庆鑫,赵鹏..煤矿富水体SOTEM响应三维数值模拟研究[J].物探与化探,2024,48(5):1176-1184,9.基金项目
河南省豫地科技集团2024年重点科研项目(JTZDKY202405) （JTZDKY202405）
广西壮族自治区重点研发计划项目(2023AB260490) （2023AB260490）
中央引导地方科技发展资金项目 （）
