Seepage characteristics of loaded fractured coal based on LBM Method

被引：0
|
作者：
Wang D. [1 ,2 ,3 ,4 ]
Yu C. [1 ,3 ]
Wei J. [1 ,3 ,4 ]
Wei Q. [1 ,3 ]
Fu J. [1 ,3 ]
机构：
[1] State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo, 454000, Henan
[2] State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, 221116, Jiangsu
[3] School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo, 454000, Henan
[4] The Collaborative Innovation Center of Coal Safety Production of Henan, Jiaozuo, 454000, Henan
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2020年 / 39卷 / 04期
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
Fractured coal; Industrial CT scanning; LBM method; Mining engineering; Numerical simulation; Seepage characteristics;
D O I：
10.13722/j.cnki.jrme.2019.0675
中图分类号：
学科分类号：
摘要：
In order to study the seepage characteristics of loaded fractured coal,the three-dimensional fracture field used for LBM numerical simulation was reconstructed by the industrial CT and image processing technology,and the CT scanning and seepage experiments of loaded coal at different loading stages were carried out. The results show that the average error of LBM simulation results is 18.72%,which is in good agreement with the test results,indicating that the LBM simulation has good accuracy and effectiveness. The accuracy of LBM simulation results is related to the development degree of cracks in coal. The more cracks develop,the better the connectivity is and the more accurate the LBM simulation results are. The permeability of fractured coal is closely related to the compression and expansion of internal fracture field. The permeability of coal decreases continuously in the compaction stage and the elastic deformation stage while increases in the late elastic deformation stage and the yield deformation stage,and reaches the maximum in the pressure relief failure stage after the peak strength. The study results verify the feasibility of LBM numerical simulation in describing the permeability of fractured coal,and provide a reliable way for visualization research on the internal gas flow mechanism,flow law and coal seam gas extraction process of loaded fractured coal in the future. © 2020, Science Press. All right reserved.
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页码：695 / 704
页数：9
相关论文
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