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Numerical Simulation of Gas Extraction in Coal Seam Strengthened by Static Blasting

Author

Listed:
  • Xiaoqiang Zhang

    (School of Environment and Resources, Xiangtan University, Xiangtan 411105, China)

  • Fengyuan Zhou

    (School of Environment and Resources, Xiangtan University, Xiangtan 411105, China)

  • Jiaxing Zou

    (School of Environment and Resources, Xiangtan University, Xiangtan 411105, China)

Abstract

For mines with low permeability and high gas emissions, static blasting technology is used to pre-split the coal seam to increase the permeability and strengthen the gas extraction, which will significantly reduce the occurrence of gas accidents in mines. Taking Wangjialing Coal Mine as the research object, the mathematical model of fluid-solid is established. The numerical simulation software COMSOL is used to simulate the established mathematical model. Simultaneously, the factors affecting the efficiency of static blasting gas extraction are analyzed by adjusting the parameters. The results reveal a more significant drop in gas pressure with increasing time. At 10 d, 30 d, 90 d and 180 d, the extraction efficiency increases by 11.80%, 18.67%, 22.22% and 24.13% in comparison to conventional extraction. In studying the influence of expansion pressure and other factors on gas extraction during static blasting, it is found that the change of negative pressure has little effect on gas extraction. Static blasting can significantly reduce gas pressure and achieve safe coal mining, providing a basis of field application of efficient gas extraction in low gas mines.

Suggested Citation

  • Xiaoqiang Zhang & Fengyuan Zhou & Jiaxing Zou, 2022. "Numerical Simulation of Gas Extraction in Coal Seam Strengthened by Static Blasting," Sustainability, MDPI, vol. 14(19), pages 1-17, September.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:19:p:12484-:d:930520
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    Citations

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    Cited by:

    1. Nie, Wen & Jiang, Chenwang & Liu, Qiang & Guo, Lidian & Hua, Yun & Zhang, Haonan & Jiang, Bingyou & Zhu, Zilian, 2024. "Study of highly efficient control and dust removal system for double-tunnel boring processes in coal mines," Energy, Elsevier, vol. 289(C).
    2. Xiaojun Feng & Zichuang Ai & Xuebo Zhang & Qilei Wei & Chenjun Du & Qiming Zhang & Chuan Deng, 2023. "Numerical Investigation of the Evolution of Gas and Coal Spontaneously Burned Composite Disaster in the Goaf of Steeply Inclined Coal Seam," Sustainability, MDPI, vol. 15(12), pages 1-17, June.
    3. Wu Xiao & Ke Li & Chuanjie Zhu & Ziwen Li & Baiquan Lin & Cong Ma & Mingkai Si, 2023. "Numerical Investigation on Potential Influencing Factors Affecting Drainage Effective Radius of Crossing Borehole," Sustainability, MDPI, vol. 15(3), pages 1-14, January.
    4. Yangyong Wu & Quanmin Xie & Chaomin Mu, 2023. "Sensitivity Analysis of Factors Influencing the Blast Resistance of Reinforced Concrete Columns Based on Grey Relation Degree," Sustainability, MDPI, vol. 15(16), pages 1-21, August.
    5. Zhicheng Fang & Wanjiang Wang & Yanhui Chen & Hui Fan & Ruoqi Dong & Dongbing Pang & Junkang Song, 2023. "Numerical Analysis of Natural Ventilation on One Side of a Room with Two Different Opening Configurations," Sustainability, MDPI, vol. 15(14), pages 1-19, July.

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