回采过程中采空区瓦斯运移数值模拟研究  

Numerical simulation of gas migration in goaf in extracting stage

作　　者：秦跃平[1] 宋宜猛[1] 罗维[1] 丁元伟[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《矿业工程研究》2009年第4期26-29,共4页Mineral Engineering Research

基　　金：国家自然科学基金资助项目(50674091);973基金项目资助项目(200CB221502)

摘　　要：为掌握采空区瓦斯分布情况,指导采空区的瓦斯抽放工作.通过对采空区瓦斯来源,以及瓦斯涌出规律进行分析,建立了二维移动坐标下采空区瓦斯浓度场数学模型,并对其进行了无因次分析.采用有限差分法设计编制了计算机程序,通过对羊草沟矿采空区移动状态下瓦斯浓度场进行数值模拟,得到了推进速度为5 m/d时的采空区瓦斯浓度分布状况.解算结果与理论分析得出的结果一致.这对矿井采空区瓦斯治理有重要的实际意义和价值.In order to ravel the distribution of gas and guide the work about gas drainage in goal, and through the analysis of gas emission law and gas sources in goaf, a mathematical model of gas concentration field in goaf in a two-dimensional mobile reference frame was established, on which a non-dimensional analysis was made, and a program in finite difference method was developed, through which a numerical simulation of gas concentration field in goal which was in a mobile state in Yangcaogou mine was performed.Calculation results showed that the distribution of gas concentration in goal which extended at the speed of 5 m/d. were correspondent with theoretical analysis.It has practical significance and value for gas controlling work.

关 键 词：采空区 瓦斯 数学模型 数值模拟 

分 类 号：TD712[矿业工程—矿井通风与安全]