关键词: 金属矿山火灾　, 漏风巷道　, 烟气扩散　, 火源位置　, 人员疏散

Abstract: Contact lanes and air leakage channels are common in mine roadways. After the fire,the propagation path of
smoke under the action of airflow and air leakage is complex,which has an impact on the safe evacuation of personnel. In order
to analyze the law of fire smoke diffusion and personnel evacuation in metal mine roadway under air leakage conditions,the -
568 m horizontal roadway of a metal mine was taken as the research object,and the coupling simulation method of PyroSim and
Pathfinder was used to numerically analyze the smoke diffusion characteristics and personnel evacuation process under different
fire source locations and ventilation conditions. The results show that the location of the fire source has a significant effect on
the evacuation time. When the fire source is close to the main lane and the area where people are concentrated,the smoke is
more likely to enter the main evacuation channel and form a long-distance low-visibility area,thus significantly reducing the evacuation
efficiency. In the range of 13. 46 ~ 26. 46 m3 / s ventilation rate,the spatial distribution characteristics of smoke
change little,and the evacuation time is not sensitive to the change of ventilation rate. The existence of the air leakage channel
changes the flue gas propagation path and forms the phenomenon of flue gas retention or backflow in the local area. The research
results can provide reference for fire risk assessment and emergency evacuation organization of air leakage roadway in
metal mines.

Key words: metal mine fires,air leakage roadway,smoke diffusion,fire source location,evacuation