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A protective seam with nearly whole rock mining technology for controlling coal and gas outburst hazards: a case study

Author

Listed:
  • Qiang Sun

    (China University of Mining and Technology (CUMT))

  • Jixiong Zhang

    (China University of Mining and Technology (CUMT)
    State Key Laboratory of Coal Resources and Safe Mining (CUMT))

  • Qiang Zhang

    (China University of Mining and Technology (CUMT))

  • Wei Yin

    (China University of Mining and Technology (CUMT))

  • Deon Germain

    (China University of Mining and Technology (CUMT)
    University of Mahajanga)

Abstract

Coal seams with low gas permeability and high gas outburst hazards are becoming more serious as coal mines extend deeper, but there are no appropriate protective coal seams for this kind of coal seam in China. In this paper, mining technology using a protective seam with nearly whole rock (PSNWR) is used to improve gas drainage and ensure safety during production. The characteristics of the distribution and occurrence of PSNWRs and their mechanical properties are analyzed. A theoretical mechanics model and three-dimensional numerical model are established to study the controlling effect of PSNWR mining on pressure-relief gas drainage. In this context, the mining process, system and gas extraction design for PSNWRs are introduced. The results for Pingdingshan No. 12 Coal Mine show that mining with a PSNWR 2.0 m thick can effectively reduce the danger of coal and gas outbursts and improve gas drainage and utilization. The gas drainage rates are >80 %, which significantly increases the social, economic and environmental benefits of Pingdingshan No. 12 Coal Mine.

Suggested Citation

  • 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.
    • Handle: RePEc:spr:nathaz:v:84:y:2016:i:3:d:10.1007_s11069-016-2512-9
    DOI: 10.1007/s11069-016-2512-9
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    References listed on IDEAS

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    1. Wei Yang & Bai-quan Lin & Jiang-tao Xu, 2014. "Gas outburst affected by original rock stress direction," 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. 72(2), pages 1063-1074, June.
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    4. 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.
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    Cited by:

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    2. Liang Cheng & Zhaolong Ge & Jiufu Chen & Hao Ding & Lishuang Zou & Ke Li, 2018. "A Sequential Approach for Integrated Coal and Gas Mining of Closely-Spaced Outburst Coal Seams: Results from a Case Study Including Mine Safety Improvements and Greenhouse Gas Reductions," Energies, MDPI, vol. 11(11), pages 1-16, November.
    3. Qiang Sun & Jixiong Zhang & Qiang Zhang & Xu Zhao, 2017. "Analysis and Prevention of Geo-Environmental Hazards with High-Intensive Coal Mining: A Case Study in China’s Western Eco-Environment Frangible Area," Energies, MDPI, vol. 10(6), pages 1-15, June.
    4. Dong Guowei & Zou Yinhui, 2017. "A Novel Method for Selecting Protective Seam against Coal and Gas Outburst: A Case Study of Wangjiazhai Coal Mine in China," Sustainability, MDPI, vol. 9(6), pages 1-15, June.
    5. Gan, Qingqing & Xu, Jiang & Peng, Shoujian & Yan, Fazhi & Wang, Ruifang & Cai, Guoliang, 2021. "Effect of heating on the molecular carbon structure and the evolution of mechanical properties of briquette coal," Energy, Elsevier, vol. 237(C).
    6. Zhanshan Shi & Donglin Ye & Bing Qin & Jianfeng Hao & Weiji Sun & Shengjie Fang, 2022. "Mining Height Effect and Application of Upper Protected Layer Mining Pressure Relief," Sustainability, MDPI, vol. 14(16), pages 1-18, August.
    7. Yanjiang Chai & Linming Dou & Jiang He & Xiaotao Ma & Fangzhou Lu & Hu He, 2024. "Limitations of Upper Protective Layers as Pressure Relief Measures for Extra-Thick Coal Seam Mining: Insights from a Case Study," Energies, MDPI, vol. 17(6), pages 1-21, March.
    8. Rui Gao & Bin Yu & Hongchun Xia & Hongfei Duan, 2017. "Reduction of Stress Acting on a Thick, Deep Coal Seam by Protective-Seam Mining," Energies, MDPI, vol. 10(8), pages 1-15, August.

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