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A Cascade Disaster Caused by Geological and Coupled Hydro-Mechanical Factors—Water Inrush Mechanism from Karst Collapse Column under Confining Pressure

Author

Listed:
  • Hao Li

    (State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China)

  • Haibo Bai

    (State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China)

  • Jianjun Wu

    (Shanxi China Coal Huajin Energy Limited Liability Company, Hejin 043300, Shanxi, China)

  • Zhanguo Ma

    (State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China)

  • Kai Ma

    (State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China)

  • Guangming Wu

    (State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China)

  • Yabo Du

    (School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China)

  • Shixin He

    (State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China)

Abstract

The water inrush from karst collapse column (KCC) is a cascading, vicious cycle disaster caused by geological and mining activities, that can cause serious casualties and property losses. The key to preventing this risk is to study the mechanism of water inrush under confining pressure. Aiming at the investigationg the characteristics of the KCC named X1 in Chensilou mine, a series of methods, including connectivity experiments, water pressure monitoring tests in two side-walls, and numerical simulations based on plastic damage-seepage (PD-S) theory have been developed. The methods are used to test the security of the 2519 mining area, the damage thickness, pore water pressure, and seepage vector in the X1. The results indicate that the X1 has a certain water blocking capacity. In addition, with the decrease of confining pressure and increase of shear stress, deviatoric stress could cause the increase of permeability, the reduction of strength, and the reduction of pore water pressure in KCC. Therefore the increased effective stress in the rock will force the rock to become more fractured. Conversely, the broken rock could cause the change of stress, and further initiate new plastic strains, damage and pore water pressure until a new equilibrium is reached. This cascading water inrush mechanism will contribute to the exploitation of deep coal resources in complex geological and hydrogeological conditions.

Suggested Citation

  • Hao Li & Haibo Bai & Jianjun Wu & Zhanguo Ma & Kai Ma & Guangming Wu & Yabo Du & Shixin He, 2017. "A Cascade Disaster Caused by Geological and Coupled Hydro-Mechanical Factors—Water Inrush Mechanism from Karst Collapse Column under Confining Pressure," Energies, MDPI, vol. 10(12), pages 1-19, November.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:12:p:1938-:d:120015
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    References listed on IDEAS

    as
    1. Cun Zhang & Shihao Tu, 2016. "Control technology of direct passing karstic collapse pillar in longwall top-coal caving mining," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 84(1), pages 17-34, October.
    2. Dan Ma & Xiexing Miao & Haibo Bai & Jihui Huang & Hai Pu & Yu Wu & Guimin Zhang & Jiawei Li, 2016. "Effect of mining on shear sidewall groundwater inrush hazard caused by seepage instability of the penetrated karst collapse pillar," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 82(1), pages 73-93, May.
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    Cited by:

    1. Hao Li & Boyang Zhang & Haibo Bai & Jianjun Wu & Qingbin Meng & Ning Xiao & Feng Li & Guangming Wu, 2018. "Surface Water Resource Protection in a Mining Process under Varying Strata Thickness—A Case Study of Buliangou Coal Mine, China," Sustainability, MDPI, vol. 10(12), pages 1-16, December.
    2. Gaizhuo Zhang & Junzhong Guo & Bin Xu & Lulu Xu & Zhenxue Dai & Shangxian Yin & Mohamad Reza Soltanian, 2021. "Quantitative Analysis and Evaluation of Coal Mine Geological Structures Based on Fractal Theory," Energies, MDPI, vol. 14(7), pages 1-14, March.
    3. Pengpeng Wang & Yaodong Jiang & Qingshan Ren, 2022. "Roof Hydraulic Fracturing for Preventing Floor Water Inrush under Multi Aquifers and Mining Disturbance: A Case Study," Energies, MDPI, vol. 15(3), pages 1-22, February.

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