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基于流体动力学理论,建立了回风隅角的紊流k-ε数学模型,分析了计算边界条件;并结合采煤工作面实例,应用Fluent6.0计算流体动力学软件模拟了工作面隅角的通风流场,得出了隅角有限空间内典型截面的流动规律。模拟计算结果表明,在回风隅角处风流速度很低,靠近采空区内部甚至更低,从而使采空区涌出的瓦斯不易扩散,而造成回风隅角附近瓦斯的积聚。该模拟结果为研究隅角瓦斯运移规律及解决回风隅角瓦斯积聚问题等提供了理论基础。
Based on the theory of fluid dynamics, a turbulence k-ε mathematical model of the return air corner was established, and the boundary conditions were calculated. Combining with the coal mining face example, the computational fluid dynamics software Fluent 6.0 was used to simulate the working face corner The flow field of the typical section in the limited space of the corner is obtained. The simulation results show that the velocity of air flow is very low near the return air corner and is even lower near the inside of the goaf, so that the gas gushed out from the goaf can not diffuse easily, resulting in the accumulation of gas near the return air corner. The simulation results provide the theoretical basis for studying the law of gas migration in the corner and solving the problem of gas accumulation in the corner of the return air.