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Effect of mining on shear sidewall groundwater inrush hazard caused by seepage instability of the penetrated karst collapse pillar

Author

Listed:
  • Dan Ma

    (China University of Mining and Technology)

  • Xiexing Miao

    (China University of Mining and Technology)

  • Haibo Bai

    (China University of Mining and Technology)

  • Jihui Huang

    (Chongqing University)

  • Hai Pu

    (China University of Mining and Technology)

  • Yu Wu

    (China University of Mining and Technology)

  • Guimin Zhang

    (China University of Mining and Technology)

  • Jiawei Li

    (China University of Mining and Technology)

Abstract

Mining-induced groundwater inrush, a type of serious hazard for underground coal extraction, occurs in tunnel or coal face combined with a large volume of groundwater gushing. It has an impartible relationship with geological structures such as karst collapse pillar (KCP), which is widely distributed in North China. To analyze the effect of coal mining on groundwater inrush caused by seepage instability of the penetrated KCP (PKCP), stress and seepage coupling equations are used to model the seepage rule, and a numerical FLAC3D model is conducted to determine the shear stress, damage zone, pore pressure, seepage vectors and effect of damage zone on seepage field development. The results indicate that when PKCP and the surrounding rocks show dislocation, shear failure may occur, which leads to a shear sidewall channel for groundwater inrush. As mining advances, the damage zone in the PKCP and its crushed area develop gradually, and the simulated damage zone development was consistent with observed thicknesses of crushed rocks. Under the effect of the support pressure and unloading of the coal face, an obvious seepage concentrate channel with greater hydraulic head and seepage vectors will form within the edge of the PKCP; then, the shear sidewall channel will gradually move to the other side with the coal face near and away. When the damage zones are crushed through, the connected fractures will become a strong seepage channel in PKCP, named as pipe flow, which may cause groundwater inrush.

Suggested Citation

  • 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.
  • Handle: RePEc:spr:nathaz:v:82:y:2016:i:1:d:10.1007_s11069-016-2180-9
    DOI: 10.1007/s11069-016-2180-9
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    References listed on IDEAS

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    1. Dan Ma & Haibo Bai, 2015. "Groundwater inflow prediction model of karst collapse pillar: a case study for mining-induced groundwater inrush risk," 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. 76(2), pages 1319-1334, March.
    2. Shangxian Yin & Jincai Zhang & Demin Liu, 2015. "A study of mine water inrushes by measurements of in situ stress and rock failures," 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. 79(3), pages 1961-1979, December.
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    Cited by:

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    2. Yang Yu & Shen-En Chen & Ka-Zhong Deng & Peng Wang & Hong-Dong Fan, 2018. "Subsidence Mechanism and Stability Assessment Methods for Partial Extraction Mines for Sustainable Development of Mining Cities—A Review," Sustainability, MDPI, vol. 10(1), pages 1-21, January.
    3. Siddhartha Roy & Devi Prasad Mishra & Ram Madhab Bhattacharjee & Hemant Agrawal, 2022. "Genetic programming for prediction of heat stress hazard in underground coal mine environment," 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. 114(3), pages 2527-2543, December.
    4. Qiang Sun & Jixiong Zhang & Qiang Zhang & Wei Yin & Deon Germain, 2016. "A protective seam with nearly whole rock mining technology for controlling coal and gas outburst hazards: a case study," 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(3), pages 1793-1806, December.
    5. Shuokang Wang & Liqiang Ma, 2019. "Characteristics and Control of Mining Induced Fractures above Longwall Mines Using Backfilling," Energies, MDPI, vol. 12(23), pages 1-24, December.
    6. Yuluan Zhao & Xiubin Li, 2016. "Spatial Correlation between Type of Mountain Area and Land Use Degree in Guizhou Province, China," Sustainability, MDPI, vol. 8(9), pages 1-15, August.
    7. 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.
    8. Dan Ma & Zilong Zhou & Jiangyu Wu & Qiang Li & Haibo Bai, 2017. "Grain Size Distribution Effect on the Hydraulic Properties of Disintegrated Coal Mixtures," Energies, MDPI, vol. 10(5), pages 1-17, April.

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