基于三维通风系统的矿井火灾影响模拟研究

Simulation Study of Mine Fire Impact Based on 3D Ventilation System

矿井火灾烟气是造成大量人员伤亡的主要原因之一,为了更好地制定井下火灾紧急救援预案,文章通过仿真模拟法研究了煤矿的进风、用风和回风地点发生火灾后的烟气流动规律。利用Ventsim可视化通风软件建立东荣三矿三维矿井通风系统模型,选取采煤工作面、采煤工作面回风巷以及主井作为研究对象,模拟井下发生火灾的情形,通过获得的数据分析CO扩散情况,制定相关应急措施。研究结果表明:主井发生火灾,CO气体会出现剧烈波动,短时间内能扩散至井下各个工作面,危害性极大;采煤工作面发生火灾,风门的位置以及关闭的时间长短对遏制CO气体传播十分关键;采煤工作面回风巷着火,在采空区瓦斯未涌出和积聚的前提下,CO会随着回风巷排出井外,危害性小。

Mine fire smoke is one of the main reasons that cause a large number of casualties.In order to make a better emergency rescue plan for underground fire,this paper studies the flue gas flow rule after fire occurs in the air inlet location,working location and the air return location of coal mine by simulation method.The visual ventilation software called Ventism is used to establish the three-dimensional mine ventilation system model of Dongrong the No.3 Mine.The coal mining face, the return wind tunnel of the coal mining face and the main well are selected as the research objects,and the fire situation in the underground is simulated.The obtained data is used to analyze CO diffusion and formulate relevant emergency measures.The results show that:in case of a fire in the main well,CO gas will fluctuate violently and spread to various underground working faces in a short time, causing great harm;in case of a fire in the working face, the location of the damper and the length of closing time are critical to the control of CO gas transmission;in case of a fire in the air return roadway,on the premise that gas is not gushed out and accumulated in the goaf,CO will be discharged out of the well along with the air return roadway,which will cause little harm.