高瓦斯综采工作面煤层瓦斯运移机制数值仿真

Numerical Simulation of Coal Seam Gas Migration Mechanism in Gassy Face

基于渗流力学原理,构建采场瓦斯运移数学模型,应用CFD技术与空度分布函数实现对不连续空间区域的方程求解,进而数值模拟单独采用专用尾巷疏导瓦斯条件及尾巷疏导与抽采瓦斯相结合条件下采场瓦斯风流场和瓦斯浓度场分布,结果表明采空区回风侧联络巷尾巷排放瓦斯结合采空区抽采,对回风隅角的瓦斯治理效果非常显著。

In this paper, based on the principle of seepage mechanics, the mathematical model of gas migration in stope was estab- lished, CFD technology and space distribution function of empty degree were applied to implement equation of discontinuous regions of space, and then the paper simulated gas flow field and gas concentration field distribution under the conditions of individually using special tail roadway to dredge gas and tail roadway dredging combining with gas extraction. The results show that the goaf gas emission at return side contact comers lane combined with the goaf gas extraction has very significant effect on gas control in retum comer.