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EARTHQUAKE ›› 2023, Vol. 43 ›› Issue (2): 1-13.doi: 10.12196/j.issn.1000-3274.2023.02.001

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Restraining Analysis of the Small Distance Borehole Apparent Resistivity on Surface Environment Influence Based on Observational Stations in Beijing

WANG Tong-li, XING Hai-lin, CUI Bo-wen, WANG Li-hong, SUN Xiao-ru   

  1. Beijing Earthquake Agency, Beijing 100080, China
  • Received:2023-01-03 Revised:2023-04-07 Published:2023-07-05

Abstract: Apparent resistivity is one of the methods to observe the micro-deformation or micro-fracture in the preparation process of middle and strong earthquakes. In recent years, the borehole apparent resistivity has been developed. It can restrain influence of environmental interference on surface apparent resistivity. Compared with the surface apparent resistivity, it can reduce influence of environmental interference and electrode devises layout area. In this paper, based on the observation of borehole apparent resistivity of small distance in Yanqing, Pinggu and Tongzhou stations in Beijing, the influence of surface irony interfrence, seasonal variation, precipitation, phreatic water and so on are analyzed. By compared with the surface apparent resistivity at the same location, the results show borehole apparent resistivity of small distance have not been basically affected by these factors, and enhances observation efficiency.

Key words: Borehole apparent resistivity, Influence factor, Beijing, Annual variation, Interference

CLC Number: