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Promoting Sustainable Coal Gas Development: Microscopic Seepage Mechanism of Natural Fractured Coal Based on 3D-CT Reconstruction

Author

Listed:
  • Chunwang Zhang

    (Center of Shanxi Engineering Research for Coal Mine Intelligent Equipment, Taiyuan University of Technology, Taiyuan 030024, China
    College of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Zhixin Jin

    (Center of Shanxi Engineering Research for Coal Mine Intelligent Equipment, Taiyuan University of Technology, Taiyuan 030024, China
    College of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Guorui Feng

    (College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Lei Zhang

    (College of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Rui Gao

    (College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Chun Li

    (College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

Abstract

Green mining is an effective way to achieve sustainable development in the coal industry. Preventing coal and gas outburst dynamic disasters are essential for ensuring sustainable and safe mining. The numerous microscopic pores within the coal serve as the primary storage space for gas, making it critical to explore the structural distribution and seepage characteristics to reveal the disaster mechanism. Under mining stress, gas within the micropores of the coal migrates outward through cracks, with these cracks exerting a significant control effect on gas migration. Therefore, this study focuses on utilizing natural fractured coal bodies as research objects, employing a micro-CT imaging system to conduct scanning tests and digital core technology to reconstruct sample pore and fracture structures in three dimensions, and characterizing the pores, cracks, skeleton structure, and connectivity. A representative elementary volume (REV) containing macro cracks was selected to establish an equivalent model of the pore network, and a seepage simulation analysis was performed using the visualization software. Revealing the seepage characteristics of fractured coal mass from a microscopic perspective. The research results can provide guidance for gas drainage and dynamic disaster early warning in deep coal mines, thus facilitating the sustainable development of coal mining enterprises.

Suggested Citation

  • Chunwang Zhang & Zhixin Jin & Guorui Feng & Lei Zhang & Rui Gao & Chun Li, 2024. "Promoting Sustainable Coal Gas Development: Microscopic Seepage Mechanism of Natural Fractured Coal Based on 3D-CT Reconstruction," Sustainability, MDPI, vol. 16(11), pages 1-16, May.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:11:p:4434-:d:1400569
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    References listed on IDEAS

    as
    1. Yujiang Zhang & Yining Wang & Bingyuan Cui & Guorui Feng & Shuai Zhang & Chunwang Zhang & Zhengjun Zhang, 2023. "A Disturbed Voussoir Beam Structure Mechanical Model and Its Application in Feasibility Determination of Upward Mining," Energies, MDPI, vol. 16(20), pages 1-18, October.
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