井下移动热源对深部巷道风流环境影响研究

Research on the impact of underground moving heat sources on the wind flow environment of deep roadways

为探究深部巷道内移动热源对巷道风流环境的影响,以新城金矿为工程背景,对深部某中段运输巷道进行风温风速监测,通过现场调研和理论公式计算新城金矿深部巷道燃油设备放热量,基于Fluent有限元软件,模拟不同风流情况下移动热源的动态响应,分析移动热源对深部巷道风流环境的影响。结果表明:监测段巷道平均风速为1.91 m/s,平均风温为33.38℃;热源在顺风移动时对前端和尾部风温均产生影响,风温随距离增加逐渐减小,在热源前端15 m处趋于稳定,稳定风温为33.75℃,并在热源尾部2 m范围内持续产生高温;热源逆风移动时仅对尾部风温产生影响,风温在热源尾部0~20 m逐渐变小,并在热源尾部20 m处趋于稳定,稳定风温为34.12℃;热源逆风移动时对风流的影响范围比顺风移动时大,逆风移动时风温比顺风移动时高0.37℃。

In order to explore the influence of moving heat sources in the deep roadway on the wind flow environment,with Xincheng Gold Mine as the engineering background,the wind temperature and wind speed monitoring of a transport roadway on a deep level was carried out,and the heat release of fuel equipment in the deep roadway of Xincheng Gold Mine was calculated by field investigation and theoretical formula.Based on Fluent finite element software,simulation of the dynamic response of moving heat source under different wind flow conditions,and the influence of moving heat source on deep roadway wind flow environment was analyzed.The results show that the average wind speed is 1.91 m/s and the average wind temperature is 33.38℃in the monitoring section;when the heat source moves downwind,the wind temperature on both the front end and the tail end is affected.The wind temperature gradually decreases with the increase of distance and tends to be stable at 15 m at the front end of the heat source,and the stable wind temperature is 33.75℃,high temperature is generated continuously within the 2 m range at the tail of heat sources;when the heat source moves against the wind,only the tail wind temperature is affected.The wind tempera-ture gradually decreases within the 0-20 m range of the tail of the heat source and becomes stable at 20 m of the tail of the heat source.The stable wind temperature is 34.12℃;the range of influence of heat source on wind flow when moving upwind is larger than that when moving downwind,and the wind temperature when moving upwind is 0.37℃higher than that when moving downwind.