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<p>Water hazards present a significant challenge in the construction of coal mine tunnels. The borehole transient electromagnetic method (BTEM) is a detection technique that positions both the transmitter and receiver coils within a borehole, effectively reducing the influence of metal structures found within the tunnel. Consequently, BTEM has been proposed for the advanced detection of water hazards in coal mine tunnels. Given that research on the BTEM is relatively recent, the issue of resolution in detecting anomalous bodies has not been thoroughly explored. This study conducts a three-dimensional simulation of the BTEM, focusing on factors such as distance, deflection angle, conductivity, and the shape of anomalous bodies while evaluating the minimum resolution at a specified distance. An analysis of the simulation results offers valuable insights into the minimum resolution of the BTEM across different deflection angles and distances. Additionally, the method’s sensitivity to low-resistance bodies is examined. Further simulations are conducted to assess the minimum resolution of the BTEM at distances of 50&#xa0;cm and 100&#xa0;cm.</p>

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Study on the resolution capability of borehole transient electromagnetic method

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年5月12日

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  • Tao Fan,
  • Hao Wang,
  • Zaibin Liu,
  • Ping Li,
  • Bin Yan,
  • Zhao Zhao,
  • Youxin An,
  • Rui Zhao,
  • Guihong Li,
  • Qiang Liu

摘要

Water hazards present a significant challenge in the construction of coal mine tunnels. The borehole transient electromagnetic method (BTEM) is a detection technique that positions both the transmitter and receiver coils within a borehole, effectively reducing the influence of metal structures found within the tunnel. Consequently, BTEM has been proposed for the advanced detection of water hazards in coal mine tunnels. Given that research on the BTEM is relatively recent, the issue of resolution in detecting anomalous bodies has not been thoroughly explored. This study conducts a three-dimensional simulation of the BTEM, focusing on factors such as distance, deflection angle, conductivity, and the shape of anomalous bodies while evaluating the minimum resolution at a specified distance. An analysis of the simulation results offers valuable insights into the minimum resolution of the BTEM across different deflection angles and distances. Additionally, the method’s sensitivity to low-resistance bodies is examined. Further simulations are conducted to assess the minimum resolution of the BTEM at distances of 50 cm and 100 cm.