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Using the Magnetotelluric Method for Detecting Aquifer Failure Characteristics under High-Intensity Mining of Thick Coal Seams

Author

Listed:
  • Erhu Bai

    (School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
    State Key Laboratory of Water Resource Protection and Utilization in Coal Mining, Beijing 102211, China)

  • Wenbing Guo

    (School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
    Synergism Innovative Centre of Coal Safety Production in Henan Province, Jiaozuo 454003, China)

  • Dongsheng Zhang

    (School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

  • Yi Tan

    (School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
    State Key Laboratory of Water Resource Protection and Utilization in Coal Mining, Beijing 102211, China
    Department of Mining Engineering, West Virginia University, Morgantown, WV 26505, USA)

  • Mingjie Guo

    (School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
    State Key Laboratory of Water Resource Protection and Utilization in Coal Mining, Beijing 102211, China)

  • Gaobo Zhao

    (School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China)

Abstract

In the ecologically fragile mining area of northwest China, high-intensity mining has seriously affected the aquifer and surface eco-environment. In order to better implement water-preserved mining in ecologically fragile areas, the aquifer failure characteristics should be first detected accurately; therefore, it is necessary to find a convenient and fast detection method. Based on the analysis of the basic principles and influencing factors of the magnetotelluric (MT) method, the feasibility of using the MT method to detect aquifer failure is verified by testing the mined area with MT detection and field borehole measurement. Subsequently, the failure characteristics of overburden and unconsolidated aquifers under high-intensity mining are studied by MT detection and physical simulation. By comparing the physical simulation with the field measurement from the aspects of the maximum surface subsidence, interval of periodic weighting and step cracks, the reliability of the height of the water flowing fracture zone and caving zone obtained from physical simulation is verified. The analysis from MT detection and physical simulation shows that the results of the two methods are in accord with each other, which further confirms that the MT method can be used to detect the failure of overburdened structures and aquifers. The penetrating fractures are the main channel for the downward seepage of water resources, which is caused by the “two-zone” of overburden model and located in the “dimple” shape in the apparent resistivity (AR) isogram. It can provide a reference and technical support for the corresponding new water-preserved mining technology and the construction of digital mines.

Suggested Citation

  • Erhu Bai & Wenbing Guo & Dongsheng Zhang & Yi Tan & Mingjie Guo & Gaobo Zhao, 2019. "Using the Magnetotelluric Method for Detecting Aquifer Failure Characteristics under High-Intensity Mining of Thick Coal Seams," Energies, MDPI, vol. 12(22), pages 1-14, November.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:22:p:4397-:d:288600
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    References listed on IDEAS

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    1. Zizheng Zhang & Xianyang Yu & Hai Wu & Min Deng, 2019. "Stability Control for Gob-Side Entry Retaining with Supercritical Retained Entry Width in Thick Coal Seam Longwall Mining," Energies, MDPI, vol. 12(7), pages 1-16, April.
    2. Yajun Wang & Yubing Gao & Eryu Wang & Manchao He & Jun Yang, 2018. "Roof Deformation Characteristics and Preventive Techniques Using a Novel Non-Pillar Mining Method of Gob-Side Entry Retaining by Roof Cutting," Energies, MDPI, vol. 11(3), pages 1-17, March.
    3. Xingen Ma & Manchao He & Jiandong Sun & Haohao Wang & Xiaoyu Liu & Enze Zhen, 2018. "Neural Network of Roof Cutting Blasting Parameters Based on Mines with Different Roof Conditions," Energies, MDPI, vol. 11(12), pages 1-22, December.
    4. Bin Song & Shuai Zhang & Dongsheng Zhang & Gangwei Fan & Wei Yu & Qiang Zhao & Shuaishuai Liang, 2018. "Inorganic Cement Grouting for Reinforcing Triangular Zone of Highly Gassy Coal Face with Large Mining Height," Energies, MDPI, vol. 11(10), pages 1-23, September.
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    Cited by:

    1. Wen Zhai & Wei Li & Yanli Huang & Shenyang Ouyang & Kun Ma & Junmeng Li & Huadong Gao & Peng Zhang, 2020. "A Case Study of the Water Abundance Evaluation of Roof Aquifer Based on the Development Height of Water-Conducting Fracture Zone," Energies, MDPI, vol. 13(16), pages 1-16, August.
    2. Erhu Bai & Wenbing Guo & Yi Tan & Mingjie Guo & Peng Wen & Zhiqiang Liu & Zhibao Ma & Weiqiang Yang, 2022. "Regional Division and Its Criteria of Mining Fractures Based on Overburden Critical Failure," Sustainability, MDPI, vol. 14(9), pages 1-15, April.

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