ESTIMATION OF EFFECTIVENESS OF A SYSTEM OF SMOKE REMOVAL AT THE MOVING TRAIN BURNING IN THE TUNNEL

Statement of the problem. Despite a relative rarity of fires in underground tunnels, their conse-quence, as a rule, are rather tragic. Emergency operation of a system of tunnel ventilation should provide, first of all, a reliable removal of products of burning (smoke and fire gases), preventing them from occurring on routes of evacuation of passengers. Calculation dependencies for defining the stress parameters of tunnels should consider a variety of schemes of ventilating connections of compromise jointss, various conditions of their formation, a possible location of a fire and a prospective direction of smoke removal.Results and conclusions. The effectiveness of a system of smoke removal, providing evacuation of passengers at rolling stock burning in a tunnel and including calculation of stress parameters of ventilation of tunnels and thermal factors of a fire which are formed during the operation of a system of tunnel ventilation of undergrounds in the smoke removal mode was evaluated. Taking into account a possible location of a fire in a rolling stock and a prospective direction of removal of a smoke and fire gases, critical depression of a tunnel, critical thermal depression, thermal depression of a fire, critical speed of air pay off were calculated.