Study on multi-field coupling effect and parameter optimization of gas extraction in deep coal seam
Huang Wenzheng 1, Cai Xuemin 1, Liu Ruiming 2, Zhang Shilong 2, Zhang Minbo 2
1. Jizhong Energy Fengfeng Group Testing and Inspection Center, Handan 056200, China ;
2. College of Resources and Safety Engineering, Wuhan Institute of Technology, Wuhan 430074, China
In order to optimize the gas extraction efficiency of deep ' three soft ' coal seams, this study reveals that the internal system of coal and anisotropic fracture network are the key microstructures to control gas adsorption and seepage through field emission scanning electron microscopy experiments. Based on the thermal-fluid-solid multi-field coupling theory, a multi-physical field mathematical model of gas-bearing coal was constructed by COMSOL, and the influence of parameters such as borehole diameter, initial pressure and permeability on the extraction effect was systematically analyzed. The numerical simulation results show that increasing the borehole diameter can effectively reduce the flow resistance. The initial gas pressure and permeability are positively correlated with the extraction volume. In the field verification of Lugou Coal Mine in Zhengzhou, the optimal parameter combination of pore size 134 mm, pressure 2.5 MPa and permeability 4×1 015 m2 was adopted. The extraction results were highly consistent with the simulation prediction, which confirmed the reliability and applicability of the model, and provided a theoretical basis and parameter optimization scheme for efficient gas extraction in deep coal seams.
黄文争1，蔡学敏1，刘睿鸣2，张世龙2，张民波2. 深部煤层瓦斯抽采多场耦合效应及参数优化研究[J]. 煤炭与化工, 2026, 49(4): 106-112.
Huang Wenzheng 1, Cai Xuemin 1, Liu Ruiming 2, Zhang Shilong 2, Zhang Minbo 2. Study on multi-field coupling effect and parameter optimization of gas extraction in deep coal seam. CCI, 2026, 49(4): 106-112.
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