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Effect of damage evolution of coal on permeability variation and analysis of gas outburst hazard with coal mining

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  • Yi Xue
  • Feng Gao
  • Xingguang Liu

Abstract

Coal and gas outburst disasters in coal seams are becoming more serious as coal mines extend deeper underground in China. Damage evolution has affected gas flow in coal seam greatly, which also controls gas permeation and gas extraction results, and finally, it has tremendous influence on prevention and control of gas disaster accidents. In this paper, the cracking process of coal under compressive stress condition and the permeability variation during the whole process is experimentally studied with the aid of 3D acoustic emission monitoring system. The experimental results suggest that the coal failure and degradation of mechanical properties are essentially related to the propagation and coalescence of induced cracks. Using a damage tensor defined by the direction-dependent crack density, the damage evolution during the whole loading process is studied. It is revealed that the damage evolution is mainly initiated with the appearance of microcracks and accelerated in the post-peak region. During the post-peak region, a similar increase tendency of damage and permeability is noticed, and therefore, a post-peak permeability model is proposed considering the influence of damage evolution on the permeability variation in the post-peak region. Finally, we analyze the gas outburst hazard with coal mining. There exists a transition zone around the vertical stress concentration, and energetic failure may result in this transition zone. Copyright Springer Science+Business Media Dordrecht 2015

Suggested Citation

  • 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.
    • Handle: RePEc:spr:nathaz:v:79:y:2015:i:2:p:999-1013
    DOI: 10.1007/s11069-015-1888-2
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    References listed on IDEAS

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    1. Rongkun Pan & Yuanping Cheng & Liang Yuan & Minggao Yu & Jun Dong, 2014. "Effect of bedding structural diversity of coal on permeability evolution and gas disasters control 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. 73(2), pages 531-546, September.
    2. Dingqi Li, 2014. "Mining thin sub-layer as self-protective coal seam to reduce the danger of coal and gas outburst," 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. 71(1), pages 41-52, March.
    3. Shouqing Lu & Yuanping Cheng & Jinmin Ma & Yuebing Zhang, 2014. "Application of in-seam directional drilling technology for gas drainage with benefits to gas outburst control and greenhouse gas reductions in Daning coal mine, China," 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. 73(3), pages 1419-1437, September.
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    Cited by:

    1. Xiong Ding & Cheng Zhai & Jizhao Xu & Xu Yu & Yong Sun, 2022. "Study on Coal Seepage Characteristics and Secondary Enhanced Gas Extraction Technology under Dual Stress Disturbance," Sustainability, MDPI, vol. 14(22), pages 1-18, November.
    2. Zhenhua Yang & Chaojun Fan & Tianwei Lan & Sheng Li & Guifeng Wang & Mingkun Luo & Hongwei Zhang, 2019. "Dynamic Mechanical and Microstructural Properties of Outburst-Prone Coal Based on Compressive SHPB Tests," Energies, MDPI, vol. 12(22), pages 1-16, November.
    3. 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.
    4. Yang Liu & Tong Zhang & Yankun Ma & Shuaibing Song & Ming Tang & Yanfang Li, 2022. "Deformation behavior and damage-induced permeability evolution of sandy mudstone under triaxial stress," 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. 113(3), pages 1729-1749, September.

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