随着煤矿开采深度及开采力度的不断加大，矿井安全开采问题日益显著，尤其是开采活动破坏了地层原有的气体平衡，导致大量瓦斯涌入采掘工作面。煤油共生矿井油型气涌出具有隐蔽性、突发性及涌出量大的特点，因此，在煤油气共生矿井开采过程中，油型气的异常涌出已经成为煤矿安全开采新的致灾因素。 针对油型气涌出造成掘进巷道局部瓦斯浓度易超限的问题，本文在分析油型气涌出特征及成分的基础上，根据掘进巷道实际参数及瓦斯、油型气涌出状况，建立油型气涌出掘进巷道物理模型，同时依据压入式通风理论建立了数学模型。采用ANSYS软件对掘进巷道采用压入式局部通风方式时的风流结构特点进行数值模拟，研究了油型气以不同涌出量涌出的CH4的扩散规律以及不同巷道断面积、不同风筒出风风速、不同风筒直径以及风筒距工作面不同距离对于油型气扩散的影响，确定了合理的局部通风参数。 模拟计算结果表明：随着油型气涌出量的增大，涌出稳定后掘进巷道相同位置的CH4浓度会有相应的增加，油型气涌出量越大，CH4沿顶板逆流向工作面的距离越长；巷道断面积增大，对于增强局部通风效果有利，但对于排出巷道底板油型气，巷道断面积并不是越大越好；风筒的送风速度增大，巷道的平均风速就会增大，能有效的排出油型气；风筒直径增大可以减少通风阻力和漏风量，巷道风流流量增大，风速加快，对于排出巷道底板油型气有积极作用；风筒出口距掘进巷道迎头端面的距离越近，风流与油型气混合更加充分，对底板油型气排出有利；同时模拟得出当风筒送风速度为10m/s，风筒出口直径为1m，风筒出口距掘进巷道迎头端面的距离为6m时，掘进巷道内部风流速度较大，巷道风流能够充分稀释底板涌出的油型气，能够有效地防止巷道局部瓦斯积聚。

With the depth of coal mining augmented, mining safety is becoming increasingly significant, especially the destruction of the original gas equilibrium underground, resulting in a large number of gas flowing into the driving surface. During the mining process, Methane emission is particularly serious. Thus, the abnormal gas effusing has become one of the major factors affecting the mining safety. In order to optimize local ventilation parameter of oil type gas emitted from the drivage roadway and solve the local gas concentration exceeding limits caused by oil-type gas emission in drivage roadway. According to actual parameters of drivage roadway and emission status of oil-type gas, this paper used the simulation software, ANSYS to contuct the forcing type ventilation of drivage roadway, analyse the air flow characteristics and study the distribution of CH4 concentration under the condition oil-type gas emission. This paper studied the the distribution of CH4 concentration in the condition of the different oil-type gas emission quantity, different the parameters of the supply air and the parameters of working face, including the basal area of roadway, airduct diameter, outlet air velocity and the distance to working face. the reasonable parameters of the supply air and the parameters of working face were confirmed. The numerical simulation results show that: with the increase of oil type gas emission, the concentration of CH4 in the same locations will have a corresponding increase emission. Oil type gas emission quantity is bigger, the longer countercurrent distance to the working face along the roof of roadway. The basal area increases, which has positive effect to enhance the local ventilation effect, but for the discharge of oil-type gas emissioned from the bottom of roadway, the basal area is not bigger and better. With the incease of Airduct outlet velocity, the average wind speed of roadway will increase, which has a positive effect on the discharge of oil type gas. An increased diameter can reduce the ventilation resistance and air. With the increased of air output, the wind speed increases, which has a positive effect on the discharge of oil type gas emissioned from bottom of roadway. The distance between airduct exit to heading face in local ventilation has an obvious effect of the jet. When the actual roadway, which geometric model based on for simulation in this paper selected 10m/s as the air duct outlet velocity, 1 m as air duct outlet diameter, and 6m as the distance between airduct exit to heading face the mixture of oil type gas and wind in the drift was more sufficient, and the area with methane of high concentration was smaller.