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the main important factors to affect the evacuation of people by analyzing the fire theory happened in the underground space have been gotten. They are fire temperature, smoke concentration, and poisonous gas and ventilated velocity etc key factors. Do the emulation analysis about some kind of underground space fire by fire simulation software Smartfire and the fire scene and situation have been gotten. Import the fire simulation results into the buildingEXODUS software and get the people evacuation conclusion. The authors use the risk accepted rules to evaluate the result and get the risk level is 2C. The risk level can be accepted, however, it is not so optimistic. It needs strength the fire and smog ventilation parameters design to reduce the people casualty from fire.

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