随着矿井开采深度不断延伸，矿井集约化程度及开采规模不断提高，矿井瓦斯涌出量也不断增加，随之而来的瓦斯隐患和事故也逐渐增多，其中采空区漏风是造成工作面上隅角瓦斯超限和采空区遗煤自燃的主要原因之一，本文利用基于网络解算的采空区漏风分布计算模式对采空区的流场分布进行模拟，然后分析采空区的瓦斯浓度场分布，可以对采煤工作面的安全生产提供重要的安全指导数据。本文通过对采空区瓦斯浓度场分布规律的研究分析，研究了采空区瓦斯涌出源、采动卸压瓦斯运移和积聚规律及瓦斯的扩散运动规律，对瓦斯浓度场数值模型的建立具有重要的指导意义。 流管模型始于19世纪60年代，主要应用于水流和油气田开发，在采空区瓦斯浓度场的数值模拟方面却较少应用，本文利用其流管模型简明的概念和思路，建立采空区流场已知的浓度场求解公式，同时绘制了采空区浓度场的流线及流场，根据监测到的有限点瓦斯浓度数据，更加直观的展现采空区瓦斯浓度场的分布规律。 最后以煤矿实例，结合本文的采空区漏风场的计算和流管模型进行了采空区的流场及瓦斯的浓度场的计算分析。

With the continuous extension of the depth of mining and the increase of mine intensification and the scale of mining, mine gas emission also increases, followed with the increasing gas hazard and accidents.And Gob air leakage is one of the most principal reasons that cause the working plane angle appearing the phenomenon of transfinite gas. This thesis simulates the gob flow field by virtue of the air leakage on the distribution calculation model base on network solution. Later, this thesis analyses the gas concentration field in Gob, and these analysis will offer the safe produce on coal face with the important monitoring data. With the analysis of the gas concentration distribute regular pattern, we know the gas emission source, migration and accumulation rule of mining discharging pressure gas, the diffusion movement rules and accumulation rules. At the same time, these rules and regular pattern will give the important ideas on the simulation with the Gob gas concentration field. The stream tube model originated in from 1960s, and it is applied in the development of flow and oil and gas field. However, it is rarely seen to be applied in simulating the Gob gas concentration field. This thesis uses the explicit theory of the stream tube model, to build the solution formula with the known flow field in Gob. Meanwhile, we draw the flow line and flow field graph about the gas concentration field in Gob. Through the finite monitoring point, we can see the rules of the gas concentration distribution in Gob more directly. In the end, we apply the theories of Gob air leakage and stream tube model to one coal.And we get the flow field and the gas concentration field. The results show that the computation models of this thesis are correct and convenient.