矿井火灾对巷道通风的影响研究

摘要

In order to study the impact of mine fire on tunnel ventilation, the software of fire dynamics simulator (FDS) is applied to examine the mine fire's effects upon the ventilation of the level and uplink tunnels. The results show that the fire leads to the change of the air movement. According to distribution of the air velocity in tunnel, the tunnel can be divided into four regions. It can be seen through analysis that the throttling effect exists in the level tunnel, but its buoyancy effect can be ignored; While both the throttling and buoyancy effects exist in the uplink tunnel, and the throttling effect is increased obviously with the power of heat release increasing.%为了研究井下火灾对巷道通风的影响,采用火灾模拟软件FDS考察了水平巷道和上行巷道发生火灾时对其通风的影响.结果表明:火灾导致巷道气流运动规律发生变化,根据巷道气流速度分布,可将巷道分成4个区域.从分析结果看出,水平巷道存在节流效应,浮力效应可以忽略;而在上行巷道中则同时存在着节流效应和浮力效应,并且随着热释放功率的增大,节流效应更加明显.