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Study on Stress – Fluid Coupling of Coal Seam Floor Water Outburst Based on FLAC 3D Simulation

  • INNOVATIVE TECHNOLOGIES OF OIL AND GAS
  • Published:
Chemistry and Technology of Fuels and Oils Aims and scope

Coal mine water outburst under fluid-solid coupling is a hot topic in coal geology. In this paper, the FLAC 3D simulation method is used to systematically study the water outburst problem of fluid coupling with coal mine floor. The results show that the vertical stress of the floor in the goaf has an obvious downward trend after coal seam excavation. Under the joint influence of mine pressure and bearing water pressure, the working face before the old roof pressure can be affected by two stages: the first stage is the advance pressure compression section on both sides of the working face, and the other stage is the pressure relief expansion section under the goaf. Before the old roof is pressed, the shear stress near the roof and floor is also affected to some extent. The front and rear displacement value of the goaf is negative, which is the result of the advance supporting pressure. The effective thickness of the floor waterproof layer decreases gradually with the advance of the working face. When the working face continues to advance, there will be a risk of water outburst. With the increasing width of the working face, the height of the guide belt increases. Therefore, in the process of mining activities, a variety of factors should be considered comprehensively, and a reasonable width of the working face should be selected to ensure the safety of mining.

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Acknowledgements

This study was supported by the Youth Science and Technology Talents Growth Project for Guizhou Education Department (Qian Education NO. [2018] 347th).

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Authors and Affiliations

  1. College of Agriculture and Forestry Engineering and Planning, Tongren University, Tongren, China

    Chunjie Song & Wanlong Huang

  2. Guizhou Xuheng Design Limited Company, Tongren, China

    Xinyu Hu

  3. Université Paris-Saclay, Orsay, France

    Zi Chen

Authors
  1. Chunjie Song
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  2. Xinyu Hu
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  3. Zi Chen
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  4. Wanlong Huang
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Corresponding author

Correspondence to Chunjie Song.

Additional information

Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 6, pp. 160–166, November – December, 2023.

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Song, C., Hu, X., Chen, Z. et al. Study on Stress – Fluid Coupling of Coal Seam Floor Water Outburst Based on FLAC 3D Simulation. Chem Technol Fuels Oils 59, 1304–1312 (2024). https://doi.org/10.1007/s10553-024-01648-3

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