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Regional Division and Its Criteria of Mining Fractures Based on Overburden Critical Failure

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  • Erhu Bai

    (School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
    Henan Key Laboratory for Green and Efficient Mining & Comprehensive Utilization of Mineral Resources, Henan Polytechnic University, Jiaozuo 454003, China
    State Collaborative Innovative Centre of Coal Work Safety and Clean-Efficiency Utilization, Jiaozuo 454003, China)

  • Wenbing Guo

    (School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
    Henan Key Laboratory for Green and Efficient Mining & Comprehensive Utilization of Mineral Resources, Henan Polytechnic University, Jiaozuo 454003, China
    State Collaborative Innovative Centre of Coal Work Safety and Clean-Efficiency Utilization, Jiaozuo 454003, China)

  • Yi Tan

    (School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
    Henan Key Laboratory for Green and Efficient Mining & Comprehensive Utilization of Mineral Resources, Henan Polytechnic University, Jiaozuo 454003, China
    State Collaborative Innovative Centre of Coal Work Safety and Clean-Efficiency Utilization, Jiaozuo 454003, China)

  • Mingjie Guo

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

  • Peng Wen

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

  • Zhiqiang Liu

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

  • Zhibao Ma

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

  • Weiqiang Yang

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

Abstract

Mining fracture is the key factor in realizing water-conservation mining, stability evaluation of coal mining subsidence areas, and accurate restoration of the surface eco-environment. To clarify, the evolution and distribution of mining fractures, based on the key strata theory and the mining degree of overburden failure, the contact state of rock stratum after overburden critical failure was analyzed, the formation mechanism of “saddle shaped” water conducting fracture zone was revealed, and the permanent mining fractures were determined to be primarily concentrated in the overburden structure at the boundary of the working face. According to the shear test of sandstone in the fracture zone, the damage degree of the rock sample was positively correlated with shear stress, and the overburden structure exhibited no instability. Based on the distribution of mining fractures, the fracture zone was divided into the original fracture, tensile fracture, structural void, and void compaction areas in the horizontal direction. The structural void area had the largest residual deformation in the goaf. A regional division method based on overburden critical failure was proposed and applied in engineering by using surface movement monitoring. The results showed that the surface subsidence near the boundary of working face was greater than that in the middle, and the residual surface deformation in the goaf was closely related to the mining time, which has long-term characteristics. The rationality of the regional division method of mining fractures was also verified.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:9:p:5161-:d:801535
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    References listed on IDEAS

    as
    1. 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.
    2. Dongjing Xu & Suping Peng & Shiyao Xiang & Yunlan He, 2017. "A Novel Caving Model of Overburden Strata Movement Induced by Coal Mining," Energies, MDPI, vol. 10(4), pages 1-13, April.
    3. Xiuchang Shi & Jixing Zhang, 2021. "Characteristics of Overburden Failure and Fracture Evolution in Shallow Buried Working Face with Large Mining Height," Sustainability, MDPI, vol. 13(24), pages 1-19, December.
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    Cited by:

    1. Erhu Bai & Xueyi Li & Wenbing Guo & Yi Tan & Mingjie Guo & Peng Wen & Zhibao Ma, 2022. "Characteristics and Formation Mechanism of Surface Residual Deformation above Longwall Abandoned Goaf," Sustainability, MDPI, vol. 14(23), pages 1-16, November.
    2. Xiuchang Shi & Guangluo Lyu, 2023. "Mechanism of Bed Separation Water Inrush during the Mining of Extra-Thick Coal Seam under Super-Thick Sandstone Aquifer," Sustainability, MDPI, vol. 15(13), pages 1-17, July.
    3. Hongyan Qin & Jingui Zhang & Zhiheng Cheng & Zhenhua Ouyang & Liang Chen & Haiyang Yi & Xidong Zhao & Yang Li & Hao Liu, 2022. "Research on Overburden Failure Characteristics Based on the Theory of Plates and Shells," Sustainability, MDPI, vol. 14(18), pages 1-16, September.
    4. Liang Wang & Qingbiao Guo & Xuexiang Yu, 2023. "Stability-Level Evaluation of the Construction Site above the Goaf Based on Combination Weighting and Cloud Model," Sustainability, MDPI, vol. 15(9), pages 1-17, April.

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