Abstract:  Taking the fire accidents in the train of Line 2 and on the public zone in the concourse level of Zijing Mountain subway station in Zhengzhou Metro as an example, according to the relevant provisions on occupants' safety evacuation in Code for safety evacuation of Metro (GB/T 33668- 2017) and Standard for Fixed Guideway Transit and Passenger Rail Systems (NFPA 130- 2017), evacuation time were calculated respectively, and also the safety assessment were carried out. The calculation results showed that according to the GB/T 33668-2017, the evacuation time in case of fire in the train of Line 2 is 345.64 s, and 339.18 s in case of fire on the public zone in the concourse level, both of them meet the 6 min safety evacuation requirements. According to the NFPA 130-2017, the evacuation time in case of fire in the train of Line 2 is 557.78 s, and 400.46 s in case of fire on the public zone in the concourse level, both of them do not meet the 6 min safety evacuation requirements. Finally, according to the difference in the calculation results of the evacuation time, the differences from four aspects: occupants' selection of safety zone, occupants' choice of evacuation path, the evacuation capacity of evacuation facilities, occupants' evacuation speed were analyzed. This will provide references for the revision of relevant codes about subway emergency evacuation and subway emergency management.

Key words:  , subway fire, emergency evacuation, evacuation time, safety assessment