TACTICAL VENTILATION IN UNDERGROUND TRANSPORT SYSTEMS
The article discusses the experience of extinguishing a fire in the foreign and Moscow metro. The analysis of the effectiveness of the use of mobile means of supply ventilation in underground transport structures during fire fighting. The necessity of using ventilation of office premises and tunnels is considered. The smoke removal efficiency was studied using various ventilation schemes during normal and emergency operation of ventilation equipment. As a result of the addition of additional fire depression and the pressure - flow characteristics of the equivalent fan, a traction source characteristic was obtained that acts in case of a fire in an escalator tunnel. It was found that the installation of mobile supply systems in the decisive direction will create the conditions for the evacuation of people, creating protection from dangerous fire factors at the most dangerous point. Conducted studies of the actions of fire-rescue units provide an opportunity to optimize actions to extinguish a fire and save people in the underground transport infrastructure.