Research on mass and heat transfer characteristics and its impact factorsbetween air flow and wet surrounding rock

In order to analyze the heat and mass transfer features and related influence factors between the air flow and the full wet rock wall, a similarity theory was applied to establish a physical model. Thus the related problems and the site measurement problems were solved. The heat and mass transfer processes between the cool air flow and the full wet surrounding rock was analyzed. The air flow velocity, humidity, temperature, surrounding rock wall temperature and other factors affected to the heat and mass transfer in the temperature cooling control area were further studied.The results showed that when the water vapor pressure of the air flow within the assumed cooling temperature control area was in a linear distribution, the error of the calculation results would be 5%～10%. During the changing process, the latent heat transfer would be 80% of the total heat transfer volume. When other conditions were certain, the air flow velocity would be increased by 25% and the mass transfer volume would be increased about 33%. The relative humidity of the air ventilation would be increased by 12.5% and the mass transfer would be reduced by 11%. The temperature of the air ventilation would be increased by 10% and the heat change coefficient would be increased by 10%. The temperature of the surround rock would be increased by 8 ℃ and the mass transfer would be increased by 79%. The factors would be influenced to the mass transfer process and also could have same important influences to the heat transfer volume and the total heat transfer coefficient.