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《Chinese Journal of Engineering Geophysics》 2010-06
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Physical Simulation Study on Low Resistive Shielding Layer of Mine Transient Electromagnetic Detecting

Hu Bing,Yu Jingcun,Liu Zhenqing,Liao Junjie,Jiang Zonglin(School of Resources and Geosciences,China University of Mining & Technology,Xuzhou Jiangsu 221116,China)  
Assuming that there are multiple low-resistivity bodies in the detecting direction,the transient electromagnetic responses of these shallow ones have been simulated based on the "smoke ring" effect theory and the similarity rule in physical simulation.The research results show that the transient electromagnetic responses of deeper low-resistivity bodies will be suppressed or even shielded by the shallow ones or thin beds,which are presented as similarly as a single conductive body's responses and rules in the multi-channel measurement profile,making the target beneath these shallow interfering bodies difficult to be distinguished.Hence,low-resistivity bodies should be evaded as far as possible in actual transient electromagnetic detection.And attempts to determine these undistinguishable targets in far distance are also suggested to be avoided.
【Fund】: 国家重大基础研究发展计划(973)项目(编号:2007CB209400)资助
【CateGory Index】: P631.322
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