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LI Cheng, ZHU Jun, CHEN Jianjie, HAN Jimin. Transient electromagnetic response characteristics of an underground high resistivity cave and practical detection effect[J]. COAL GEOLOGY & EXPLORATION, 2012, 40(6): 79-81. DOI: 10.3969/j.issn.1001-1986.2012.06.018
Citation: LI Cheng, ZHU Jun, CHEN Jianjie, HAN Jimin. Transient electromagnetic response characteristics of an underground high resistivity cave and practical detection effect[J]. COAL GEOLOGY & EXPLORATION, 2012, 40(6): 79-81. DOI: 10.3969/j.issn.1001-1986.2012.06.018
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Transient electromagnetic response characteristics of an underground high resistivity cave and practical detection effect

  • 1. College of Civil Engineering, Chongqing University, Chongqing 400045, China;

  • 2. Northwest Institute of Nuclear Technology, Xi'an 710024, China;

  • 3. Key Laboratory of New Technology for Construction of Cities in Mountain Area, of the Ministry of Education, Chongqing University, Chongqing 400030, China

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  • Received Date: December 02, 2011
  • Available Online: October 26, 2021
    Graphical Abstract
    • Abstract
  • The authors calculated the transient electromagnetic response for a sphere and measured the transient electromagnetic method (TEM) response results of a high resistivity sphere buried in a low resistivity surrounding rocks in a model experiment, and achieved the transient electromagnetic response features of the high resistivity sphere object. An exploration for a deep-buried soil cave filled with air was conducted by TEM and the results shows that the transient electromagnetic response of high resistivity cave is similar as in the model experiment. It is concluded that the electromagnetic method is effective in detecting high resistivity targets although the extent of high resistivity anomaly is larger than that of the real cave.
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