摘要
通过SEM技术获得煤真实裂隙结构,用以解决煤的非均匀性表征问题。基于裂隙结构特征,使用COMSOL求解Stokes方程来计算气体流动的动力特性,并建立气体渗透率的计算模型,同时定量化的研究了裂隙开度对渗透率的影响。结果表明:裂隙开度对煤层气渗透率的影响很大,同时当考虑Klinkenberg效应时,修正了其气体裂隙流动模型。
In this paper, the real fracture structure of coal is obtained by SEM technology to solve the problem of non-uniformity characterization of coal. Based on the characteristics of fracture structure, the dynamic characteristics of gas flow are calculated by solving the Stokes equation by COMSOL. The calculation model of gas permeability is established, and the influence of fracture opening on permeability is studied quantitatively. The results show that the fracture opening has great influence on the permeability of CBM. When the Klinkenberg effect is considered, the gas crack flow model is modified.
作者
曹栩楼
刘江峰
倪宏阳
杨典森
孟庆彬
CAO Xulou;LIU Jiangfeng;NI Hongyang;YANG Diansen;MENG Qingbin(State Key Laboratory for Genmedumics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou 221116,China;School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou 221116,China;Institution of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071.China)
出处
《煤矿安全》
CAS
北大核心
2020年第5期173-176,共4页
Safety in Coal Mines
基金
国家自然科学基金青年科学基金资助项目(51809263)
江苏省自然科学基金资助项目(BK20160249)。
关键词
数字图像
数值模拟
裂隙开度
滑脱效应
渗透率
digital image
numerical simulation
crack opening
Klinkenberg effect
permeability
