围岩散热风流温度、湿度计算时水分蒸发的处理

在进行巷道水分蒸发处理时，建立了壁面水分、风流中水分同时蒸发情况下，围岩温度场分布、壁面与风流热湿交换、风流温湿度变化的数学方程。当水分蒸发量一定情况下，解算出水分全部由巷道壁面蒸发和全部从风流中蒸发时的围岩温度分布规律，壁面温度、风流温度、风流相对湿度随巷道距离的分布规律，围岩散热热流密度随通风时间的变化规律并进行了对比分析。结果表明，水分全部由巷道壁面蒸发时比水分全部从风流中蒸发时的围岩温度低，巷道壁面温度也低，围岩散热量大，所计算出的风流温度也高；通风时间越短和巷道距离越长，差别越大。因此，在对井下风流热环境进行预测时，将巷道中水分蒸发全部处理成在巷道壁面蒸发是不合理的，应该根据实际情况同时考虑巷道壁面水分蒸发和风流中水分蒸发两个过程。

Treatment of water evaporation during calculation of temperature and humidity of airflow caused by heat release from surrounding rock

Water evaporation has a great influence on heat transfer on airway surface. The equations governing the distribution of surrounding rock temperature, heat transfer between roadway surface and airflow temperature as well as humidity of airflow are established with taking consider of water evaporation on both roadway surface and in airflow. At a certain water evaporation quantity the distribution of surrounding rock temperature, heat transfer between roadway surface, airflow temperature and humidity distribution of airflow along airway have been calculated out and comparison is made between water evaporation occurring on roadway surface thoroughly and all occurring in airflow. The results show that on the condition of water vaporizing on airway surface the rock temperature and the airway surface temperature is lower, heat released from surrounding rock is greater, airflow temperature is higher than water evaporation occurring in airflow. The shorter of the ventilation time and the longer of the ventilation course, the bigger the difference. Therefore, treat all of the water evaporation as occurring on airway surface is unreasonable and the water evaporation process in airflow should also be considered when predicting of the airflow temperature and humidity.