风速对瓦斯运移规律影响的数值模拟研究

Numerical Simulation Study on Impact of Air Speed on Gas Migration Rule

为了有效掌握采空区瓦斯分布及运移规律,基于理论分析和计算机数值模拟相结合的研究方法,利用FLUENT软件建立了综采面采空区瓦斯渗流的三维数值模型。对不同风速条件情况下的采空区风流场、瓦斯运移规律以及＂自燃三带＂分布宽度进行了数值模拟研究,对比分析了不同风速条件下综采工作面采空区流场与瓦斯分布规律,为正确认识采空区流场和瓦斯运移规律提供了理论依据,对保证煤矿的安全生产、提高矿井的经济效益有重要指导意义。

To effectively grasp the goaf gas distribution rule and gas migration,based on the theoretical analysis and computer numerical simulation,the research method of combining mining goaf gas seepage was established based on FLUENT software of three-dimensional numerical model. Numerical simulation research was carried out on the wind flow field and gas migration rule,the distribution width of spontaneous combustion ＂ three zones of spontaneous combustion＂ in different ventilation wind speed conditions,goaf flow field and gas distribution law were analysed comparatively on fully-mechanized working face with different ventilation wind speed conditions. Results can provide theory basis for the summary of goaf wind flow field and gas migration rule,has important guiding significance to ensure safety in production,and improve the economic benefits of mine.