Volume 49 Issue 4
Apr.  2023
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Article Navigation >  Journal of Mine Automation  > 2023  >  49(4): 42-49
WEN Hu, LIU Shengkai, ZHENG Xuezhao, et al. Research and prospect of UWB radar wave transmission attenuation based on borehole rescue[J]. Journal of Mine Automation，2023，49(4)：42-49.  doi: 10.13272/j.issn.1671-251x.18053
Citation: WEN Hu, LIU Shengkai, ZHENG Xuezhao, et al. Research and prospect of UWB radar wave transmission attenuation based on borehole rescue[J]. Journal of Mine Automation，2023，49(4)：42-49.  doi: 10.13272/j.issn.1671-251x.18053
shu

Research and prospect of UWB radar wave transmission attenuation based on borehole rescue

doi: 10.13272/j.issn.1671-251x.18053
  • 1.

    College of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, China

  • 2.

    Xi'an Research Center of National Mine Rescue, Xi'an 710054, China

  • Received Date: 2022-10-31
  • Rev Recd Date: 2023-03-22
    • Available Online: 2023-04-27
    Abstract
  • Obtaining the position of underground trapped personnel quickly and precisely is a key issue for life information detection in the early stage of borehole rescue. In the process of vertical drilling and rescue, due to the collapse of the roadway in the detection area or the displacement of the final hole position, it is impossible to obtain the position of the trapped personnel quickly and accurately. It delays the golden time of rescue and affects the safety of personnel. Through conducting a UWB radar wave transmission attenuation study, a rescue plan can be quickly formulated for on-site rescue commanders. This paper analyzes the current situation and demand of UWB radar wave application in mine borehold rescue. Combined with the background of mine borehold rescue, it is pointed out the attenuation law of UWB radar wave transmission. The study analyzes the influence of the characteristic parameters of the medium on the attenuation of radar wave transmission from the perspective of anisotropy of the medium. The influence of dielectric parameters on radar wave transmission attenuation is analyzed from four aspects: dielectric constant, conductivity, magnetic permeability and spatiotemporal variation. The influence of radar characteristic parameters on radar wave transmission attenuation is analyzed from two aspects: radar frequency and polarization. Based on the above analysis, it is pointed out that there are few studies on the simultaneous penetration of UWB radar waves through anisotropic media such as coal and rock masses and the mechanism of media propagation and attenuation. There are few theories and experiments on UWB radar wave transmission attenuation in complex and changeable underground or simulating disaster environments. And there are few summaries of relevant laws. The mapping relationship database between key parameters and influencing factors of UWB radar waves is not yet complete. The key technologies to be studied in the future are given as follows. It is suggested to conduct research on anisotropic media such as coal and rock masses at both macro and micro levels. It is suggested to establish an experimental simulation system for radar wave transmission attenuation under catastrophic environmental conditions. It is suggested to add research on UWB radar signal propagation characteristics and channel modeling numerical simulation in unstructured environments after disasters.

     

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