Abstract: The study of reliability of personnel safety evacuation insubway tunnel can provide decision-making basis for its safe evacuation facilities setting. FDS was used to establish the tunnel train fire model, study the available safe evacuation time of personnel in fire at the middle of train under different smoke exhaust modes.Pathfinder was used to simulate the evacuation process of people in different evacuation scenarios and the required safe evacuation time was obtained. SPSS was used to analyze the normal distribution and calculate the safety evacuation reliability of personnel in different evacuation scenarios. The research results showed that the vertical ventilation and smoke exhaust can effectively improve the safety of personnel evacuation. When the fire source is located at the middle of the evacuation port and at the evacuation port, it can be increased by 82.48% and 86.62% respectively. Under the same evacuation conditions, the evacuation reliability decreases with the increase of the fire source power and the distance between evacuation exits, while the evacuation door width has little effect on the evacuation reliability.

Key words: subway tunnel, train fire, personnel evacuation, evacuation reliability