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利用FLUENT软件建立了平直巷道物理模型,设立了与突出瓦斯环境相符的边界条件和初始条件,对突出后的高浓度瓦斯在巷道中的运移扩散进行了数值模拟。模拟得到了瓦斯浓度的衰减规律,确定了浓度1%的瓦斯运移扩散时时间与截面位置的对应关系。考虑初始瓦斯浓度及巷道风速对瓦斯运移扩散的影响,建立了初始瓦斯浓度和巷道风速影响下的瓦斯浓度峰值与截面位置关系表达式。
The physical model of straight roadway was set up by FLUENT software. Boundary conditions and initial conditions were set up in accordance with the prominent gas environment, and the numerical simulation of the migration and diffusion of the highly concentrated gas in the roadway was carried out. The attenuation law of gas concentration was obtained by simulation, and the corresponding relationship between the time of gas migration and the position of cross section was determined when the gas migration diffusion with a concentration of 1%. Considering the influence of initial gas concentration and roadway wind speed on gas migration and diffusion, the expression of gas concentration peak and cross-section position under the influence of initial gas concentration and roadway wind speed was established.