Volume 38 Issue 5
Oct.  2010
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FENG Bing, MENG Xiaohong, ZHANG Bin. Transmitting coil boundary effect for TEM large loop source and Elimination method[J]. COAL GEOLOGY & EXPLORATION, 2010, 38(5): 61-66. DOI: 10.3969/j.issn.1001-1986.2010.05.014
Citation: FENG Bing, MENG Xiaohong, ZHANG Bin. Transmitting coil boundary effect for TEM large loop source and Elimination method[J]. COAL GEOLOGY & EXPLORATION, 2010, 38(5): 61-66. DOI: 10.3969/j.issn.1001-1986.2010.05.014
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Transmitting coil boundary effect for TEM large loop source and Elimination method

  • 1. China University of Geosciences, Beijing 100083, China;

  • 2. Chang'an University, Xi'an 710054, China

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  • Received Date: February 28, 2010
  • Available Online: March 09, 2023
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    • Abstract
  • The computation of apparent resistivity for large loop source observation devices is discussed. Late-time apparent resistivity values for central loop have distortion due to boundary effect and not satisfy late-time condition and thus it affects data interpretation for coal mine goaf and water abundance. In this paper, time-domain electric dipole source vertical component of magnetic field is used to compute full-region, all-time apparent resistivity, which solved transmitting loop boundary effect and the apparent resistivity computational problems for early channel. The results of theoretical model calculations and survey data processing show the effectiveness of the method.
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