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Research of the electrical anisotropic characteristics of water-conducting fractured zones in coal seams

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Abstract

Water flooding disasters are one of the five natural coal-mining disasters that threaten the lives of coal miners. The main causes of this flooding are water-conducting fractured zones within coal seams. However, when resistivity methods are used to detect water-conducting fractured zones in coal seams, incorrect conclusions can be drawn because of electrical anisotropy within the water-conducting fractured zones. We present, in this paper, a new geo–electrical model based on the geology of water-conducting fractured zones in coal seams. Factors that influence electrical anisotropy were analyzed, including formation water resistivity, porosity, fracture density, and fracture surface roughness, pressure, and dip angle. Numerical simulation was used to evaluate the proposed electrical method. The results demonstrate a closed relationship between the shape of apparent resistivity and the strike and dip of a fracture. Hence, the findings of this paper provide a practical resistivity method for coal-mining production.

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Authors and Affiliations

  1. Institute of applied geophysics, The school resource and geosciences, CUMT, Xuzhou, 221116, China

    Ben-Yu Su & Jian-Hua Yue

Authors
  1. Ben-Yu Su
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  2. Jian-Hua Yue
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Correspondence to Jian-Hua Yue.

Additional information

This work was supported by a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions and the Fundamental Research Funds for the Central Universities 2014QNA88 as well as the National Natural Science Foundation (No. 41674133).

Su Ben-Yu, graduated from Northeast Petroleum University in Exploration Technology and Engineering in 2006. He received a master’s degree from China University of Petroleum (Beijing) in Earth Exploration & Information Technology in 2009. He pursued his Ph. D. degree from 2009 to 2012 in geophysics in Kyushu University. Currently he is teaching and doing research at China University of Mining and Technology as a geophysical associated professor. His main research field is forward and inverse numerical simulation of mining geophysics.

Yue Jian-Hua, Professor and doctoral supervisor, graduated from the Tongji University in marine geophysics in 1986. He received a master’ s degree in geophysics from the China University of Mining and Technology in 1991 and a Ph. D. degree in coal, oil, and gas geology and exploration in 1997. He pursued post-doctoral studies on mechanics from 1998 to 2001. His main research interests include coal field and mine geophysics.

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Su, BY., Yue, JH. Research of the electrical anisotropic characteristics of water-conducting fractured zones in coal seams. Appl. Geophys. 14, 216–224 (2017). https://doi.org/10.1007/s11770-017-0620-2

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  • DOI: https://doi.org/10.1007/s11770-017-0620-2

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