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Experimental and numerical investigation on the effect of moisture on coal permeability

Author

Listed:
  • Yuan Zhao

    (Chongqing University)

  • Shugang Cao

    (Chongqing University)

  • Yong Li

    (Chongqing University)

  • Hongyun Yang

    (Chongqing University)

  • Ping Guo

    (Chongqing Research Institute of China Coal Technology Engineering Group)

  • Guojun Liu

    (Chongqing University)

  • Ruikai Pan

    (Chongqing University)

Abstract

Coalbed methane is a kind of clean energy source and also a kind of hazardous gas threatening the safety of coal mine production. Permeability is a key parameter to evaluate gas migration capability. However, the permeability is influenced by moisture content. Here, a series of seepage experiments were conducted to analyze the development tendency of flux and permeability to reveal the impact mechanism. Experimental results show that permeability tends to be a sharp drop with increasing moisture, but it had a slight fluctuation with relative gas pressure increasing under the constant mean effective stress. Considering the effect of moisture and gas sorption, a new gas–solid coupling model was developed based on experimental results and theoretical analysis and was implemented into FEM software for simulation. The numerical results of the new gas–solid coupling model were in good accordance with the experimental results and have a priority to cube law in precision. This study reveals that, on the one hand, the moisture can influence the adsorption-induced strain and, on the other hand, it can lead to a significant decrease in porosity due to pore volume occupation.

Suggested Citation

  • Yuan Zhao & Shugang Cao & Yong Li & Hongyun Yang & Ping Guo & Guojun Liu & Ruikai Pan, 2018. "Experimental and numerical investigation on the effect of moisture on coal permeability," 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. 90(3), pages 1201-1221, February.
    • Handle: RePEc:spr:nathaz:v:90:y:2018:i:3:d:10.1007_s11069-017-3095-9
    DOI: 10.1007/s11069-017-3095-9
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    References listed on IDEAS

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    1. Fu-bao Zhou & Xin-xin Wang & Ying-ke Liu, 2014. "Gas drainage efficiency: an input–output model for evaluating gas drainage projects," 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. 74(2), pages 989-1005, November.
    2. Rui Zhang & Zhenquan Jiang & Qiang Sun & Shuyun Zhu, 2013. "The relationship between the deformation mechanism and permeability on brittle rock," 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. 66(2), pages 1179-1187, March.
    3. Yi Xue & Feng Gao & Xingguang Liu, 2015. "Effect of damage evolution of coal on permeability variation and analysis of gas outburst hazard with coal 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. 79(2), pages 999-1013, November.
    4. Abdullah Fisne & Olgun Esen, 2014. "Coal and gas outburst hazard in Zonguldak Coal Basin of Turkey, and association with geological parameters," 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. 74(3), pages 1363-1390, December.
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    Cited by:

    1. Junhuan Lei & Zhaoping Meng & Zhen Shen & Haoyue Chen, 2023. "Experimental study on water saturation effect on coal sample permeability under different effective stresses," 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. 116(3), pages 3139-3163, April.

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