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为了掌握采空区气体的运移情况,指导采空区瓦斯的抽采工作,针对山西晋煤集团凤凰山煤矿综采工作面上隅角瓦斯超限的实际情况,在煤层顶板覆岩内布置高位钻孔直接对上邻近层卸压瓦斯进行抽采和拦截。通过建立采空区瓦斯流动模型,并对模型中各边界条件和参数进行设置,运用FLUENT软件对综采工作面顶板抽放条件下采空区气体分布及运移规律进行数值模拟,得出采空区氧气、瓦斯气体运移规律,为防治采空区遗煤自燃和瓦斯防治提供科学依据。
In order to grasp the gas migration in the gob area and guide the gas drainage in the goaf, in view of the actual situation of gas overrun in the upper corner of the fully mechanized coal mining face of Shanxi Shanxi Coal Group, Drilling directly to the adjacent layer of pressure relief gas extraction and interception. Through the establishment of gas flow model in goaf, and setting of the boundary conditions and parameters in the model, using FLUENT software to simulate the gas distribution and migration in the gob of fully mechanized coal face, Empty area of oxygen, gas migration rules for the prevention and control of goaf spontaneous combustion and gas to provide a scientific basis.