矿井火灾具有连锁复杂性,井下巷道一旦发生火灾,产生的高温有毒有害烟气严重污染井下作业环境,威胁矿工生命安全。结合矿山实际,建立了巷道火灾烟气流动物理模型,运用FLUENT模拟分析了不同巷内风流流速以及火灾规模对巷道火灾烟气流动的影响。结果表明:巷内有毒烟气排出速率随巷内风速增大而增大,减小火灾规模利于降低有害烟气浓度及其温度。 Coal mine fire has the complexity of the chain. In the event of a fire in a mine tunnel, the high temperature toxic and harmful fumes seriously pollute the underground working environment and threaten the life and safety of the miners. Combined with the actual mine, the physical model of smoke flow in roadway fire was established. The effect of different flow velocity and fire scale on smoke flow in roadway was analyzed by FLUENT simulation. The results show that the discharge velocity of toxic fume in the lane increases with the increase of the wind velocity in the lane, reducing the scale of the fire helps to reduce the harmful fume concentration and its temperature.