Fire Risk Analysis And Evacuation Path Research Of Ground Mining Metal Mine

China is one of the major mining resources countries in the world.Guangxi has a large proportion of lead-zinc deposits in this country.Mining industry belongs to high-risk industry and accident is frequent.Once an accident occurs,it will cause heavy casualties and serious property losses.Therefore,it is a great significance to study the risk of mine fire.In this paper,Fire Dynamics Simulator(FDS)is used to build a model of Xiaba mine to analyze the temperature,CO concentration and visibility distribution of mine fire.The main results are as follows: The greater wind speed of the inlet fire source,the more obvious of throttle effect and the more serious of fire hazard.The smaller fire source wind speed in the middle section,the inclined roadway on the side is more easily affected by the fire wind pressure to reverse the wind flow.The smoke countercurrent appears in the air-out fire source,and the larger wind speed,the less obvious of countercurrent phenomenon is.During the simulation period,CO concentration does not cause harm to human,so the harmfulness of temperature and visibility should be taken into account.According to the simulation results,the available evacuation time of fire is also obtained.Through the distribution of temperature and visibility,the evacuation path a can be established.And puting forward the prevention measures of underground mine fire from two aspects of prevention and emergency.It has a certain practical guiding significance for the mine production safety and disaster escape.