近年来,随着经济的不断发展,城市化进程的加快,地铁等轨道交通规模不断拓展,已成为公共交通的重要组成部分,给人们出行带来了极大的方便。与此同时,由于地铁、隧道等空间呈一定的封闭状态,人员密集,一旦发生火灾等灾害性事故,因缺乏环境照明、氧气存量有限,易造成群死群伤的事 In recent years, with the continuous development of economy and the acceleration of urbanization, the continuous expansion of rail transit such as subway has become an important part of public transport and has brought great convenience to people’s travel. At the same time, due to the closed space and tunnels, the space is densely closed. In the event of a catastrophic accident such as a fire, due to the lack of ambient lighting and the limited oxygen inventory, it is easy to cause mass extinction