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Multi-Field Coupling Models of Coal and Gas and Their Engineering Applications to CBM in Deep Seams: A Review

Author

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  • Xingying Ma

    (China Coal Energy Research Institute Co., Ltd., Xi’an 710061, China)

  • Aitao Zhou

    (School of Emergency Management and Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China)

  • Xiaoyu Cheng

    (China Coal Energy Research Institute Co., Ltd., Xi’an 710061, China)

  • Cheng Cheng

    (China Coal Energy Research Institute Co., Ltd., Xi’an 710061, China)

  • Wei Zhao

    (School of Emergency Management and Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China)

Abstract

In the process of deep coal seam mining, the problem of coal–gas compound disasters is increasingly prominent, with the safe and efficient extraction of gas serving as the key to disaster reduction. A deep coal seam gas extraction project is a complex coupled system involving multiple physical fields, such as stress fields, gas flow fields, and energy. Constructing a systematic theoretical framework of multiphysics field coupling is crucial for improving the safety and efficiency of gas extraction. This paper examines all existing multiphysics field coupling theories. It then suggests a theoretical modeling framework that is based on three important scientific issues: the coal deformation law, the gas flow law, and the coal porosity and permeability spatiotemporal distribution law. We further analyze the application and development of the model in typical coal seam gas extraction engineering on this basis. Finally, this paper points out the shortcomings of the current research and looks forward to the future research directions for the coupled coal and gas multiphysics field model, aiming to provide a theoretical basis and guidance for the model’s construction and application in gas extraction engineering.

Suggested Citation

  • Xingying Ma & Aitao Zhou & Xiaoyu Cheng & Cheng Cheng & Wei Zhao, 2024. "Multi-Field Coupling Models of Coal and Gas and Their Engineering Applications to CBM in Deep Seams: A Review," Energies, MDPI, vol. 17(24), pages 1-27, December.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:24:p:6221-:d:1540605
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    References listed on IDEAS

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    1. Bai, Gang & Su, Jun & Zhang, Zunguo & Lan, Anchang & Zhou, Xihua & Gao, Fei & Zhou, Jianbin, 2022. "Effect of CO2 injection on CH4 desorption rate in poor permeability coal seams: An experimental study," Energy, Elsevier, vol. 238(PA).
    2. Jin Yan & Minbo Zhang & Weizhong Zhang & Qinrong Kang, 2023. "Simulation Study on the Characteristics of Gas Extraction from Coal Seams Based on the Superposition Effect and Hole Placement Method," Sustainability, MDPI, vol. 15(10), pages 1-19, May.
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