一、前言井下火灾时,因风流中混有火灾气体会危及人员及生产的安全,为保证井下人员安全撤出、防止瓦斯爆炸、阻止火灾和烟气蔓延扩大,必须对井下风流加以控制。井下火灾刚发生时,烟气沿着原来的风流方向移动,火势逐渐发展后,在被火灾所波及的巷道内,空气成分将发生变化,而且风流温度升高,形成与自然风压作用相仿的火风压。这种火风压的出现,可能会使矿井原有通风系统遭到破坏,它可以使风量增加或减少,甚至使局部地区风流逆转。研究火 I. Introduction When the underground fire, the wind mixed with fire gas will endanger the safety of personnel and production, in order to ensure the safe withdrawal of underground personnel, to prevent gas explosions, stop the spread of fire and smoke to expand, must control the underground Merry. When the underground fire just occurred, the flue gas moved along the original wind direction. After the fire gradually developed, the air composition changed in the roadway affected by the fire, and the temperature of the wind flow increased to form a function similar to that of the natural wind pressure Fire pressure. The occurrence of such fire pressure may cause the original ventilation system in the mine to be destroyed, which may increase or decrease the wind volume and even reverse the wind flow in some areas. Study fire