煤炭科技2025，Vol.46Issue(4)：1-8,8.DOI:10.19896/j.cnki.mtkj.2025.04.001
采空区瓦斯渗流—扩散规律及数值模拟研究
Study on gas seepage-diffusion law and numerical simulation in goaf
摘要
Abstract
Gas emission in goaf is one of the key issues in coal mine safety production,and the study of its laws is of great significance for gas control and resource utilization.Accurately describing the characteristics of gas migration is challenging due to the heterogeneity of goaf,the complexity of fracture networks,and the coupling of multiple factors.Therefore,taking the No.4304 working face of Malan Coal Mine as the research object,a porosity model of goaf was constructed based on the key strata theory and the distribution character-istics of"O"-ring.Combined with the seepage-diffusion mathematical model,COMSOL Multiphysics software was used to numerically simulate the gas emission process in goaf.The influence of inlet air velocity,recovery rate,and initial gas desorption rate on gas emission was systematically analyzed.The research results show that the gas concentration in the goaf gradually increases along the direction,and the gas concentration on the return air side is significantly higher than that on the inlet air side.The gas concentration is the highest at the open-off cut of the return air side,reaching 68.04%,and the gas emission rate is 3.637 5 m3/min.The research results provide a theoretical basis for gas control in goaf areas.关键词
瓦斯涌出/数值模拟/相似实验/"O"形圈分布/数学模型Key words
gas emission/numerical simulation/similar experiment/distribution of"O"-ring/mathematical model分类
矿业与冶金引用本文复制引用
崔崇斌,元继光,瞿虎,陈巧军,王朝乾,曹明亮..采空区瓦斯渗流—扩散规律及数值模拟研究[J].煤炭科技,2025,46(4):1-8,8.基金项目
国家自然科学基金项目(52074283) （52074283）
