Abstract: In order to study the mine fire's development law under the impact of multi-parameter, fire dynamics simulator software (FDS) was adopt to inspect the influence from each parameters changing to the ventilation of laneway when fire happened.The result showed the laneway crown temperature rose from 45 ℃ to 200 ℃ when the fire power increased from 180kW to 1800kW; the laneway crown temperature was from about 75～80 ℃ on average under different dip angles of laneway,which indicated that the impact of the dip angles upon the crown temperature was small. As the laneway ventilation speed increased from 0.5m/s to 3m/s, the laneway maximum air stream velocity increased from 4.60m/s to 515m/s, the distribution of upwind laneway velocity was enven and was difficult to produce circumfluence,however that of the downwind laneway velocity was disorderly and the fume layer was destroyed. This study achievement has the important and practice significance for mine fire prevention.

Key words: Mine fire, Numerical simulation, FDS, Multi-parameter coupling