纵向风条件下障碍物对矿井巷道火灾烟气流动的影响

摘要

为了研究障碍物对矿井巷道火灾烟气流动的影响,采用火灾模拟软件FDS考察了离火源不同位置的障碍物对巷道火灾烟气流动和温度场的影响.结果表明:与空旷巷道相比,有障碍物存在的巷道烟气逆流的距离增加,障碍物位于火源上游离火源的距离越近,烟气逆流的距离越远;障碍物处于火源上游,热烟气会在障碍物与火源之间聚集,随着障碍物与火源之间距离增加,热烟气沉积的距离随之增加;有障碍物存在的巷道,高温区分布在火源与障碍物之间,巷道顶棚处烟气的温度高于空旷巷道.%The impact of obstacles on fire smoke flow in mine roadway was studied by applying the software of fire dynamics simulator (FDS) to examine the effects of different obstacle locations on both smoke flow and temperature field of mine roadways.The results show that the backflowing length increases in obstacle roadway than that in empty roadway.When obstacles become closer to fire source,the backflowing length become larger.When obstacles are in the upstream,hot flue gas will be gathered between obstacles and fire.With the increase of the distance between obstacles and fire source,the subsidence distance of hot flue gas will increase.The high temperature distribution is on the path locating between the fire source and obstacles in the obstacle roadway,the flue gas temperature on the roof of roadway is higher than that on empty roadway.