地质与勘探2018，Vol.54Issue(3)：603-613,11.
地面-井下双源瞬变电磁立体探测模拟研究
Numerical and Physical Simulation of Surface- Underground Stereo Probing by the Transient Electromagnetic Method
摘要
Abstract
The transient electromagnetic (TEM) method can be used to detect local anomaly bodies in the subsurface,mines or tunnels. Because the ground-based TEM method has low signal to noise ratio and the underground transient EM emission magnetic moment is limited,their probing depth is relatively small. To solve this problem,this work proposes a stereo probing approach using double magnetic sources on the surface and in the subsurface (central loop unit on the ground only transmit and coincide loop unit in the well). Its performance is tested by numerical and physical simulations. With COMSOL software and flume experiments indoors,4 TEM devices (underground superposed loop,surface big loop transmit + underground small loop re-ceiving,surface central loop,and surface-underground stereo probing) are simulated,respectively. The results of numerical simulation show that central loop unit on the ground and coincide loop unit in the well has the maximum amplitude in inductive potential curves and the highest sensitivity. Analysis of multi-measuring-channel V(t) sections from physical modelling indicates that the surface-underground stereo probing is better than other three de-vices,which is stable,having higher magnetic induction intensity,consistent with the numerical simulation. So,this detection method with double mag-netic sources on the surface and underground is feasible and can be applied to a larger extent.关键词
瞬变电磁/COMSOL数值模拟/物理模拟/地面-井下立体探测Key words
TEM/COMSOL numerical simulation/physical simulation/surface-underground 3D probing分类
天文与地球科学引用本文复制引用
许颢砾,王大庆,刘志新,邓正栋,于景邨,丁志斌..地面-井下双源瞬变电磁立体探测模拟研究[J].地质与勘探,2018,54(3):603-613,11.基金项目
国家重点研发计划南海典型岛屿主要废弃物资源化利用技术(编号:2017YFC0506304)项目资助. （编号:2017YFC0506304）
