Numerical Simulation Study on Ventilation and Cooling of Deep Mine Tunnels
Aiming at the problems such as high temperature and difficult air supply in single-head excavation in high-temperature deep mine,based on gas-solid two-phase flow theory,three-dimensional fluid simulation software was adopted to simulate the high-temperature environment in deep well.According to the distribution characteristics of temperature field and velocity field in main transportation roadway and single-head roadway under different ventilation parameters,the influence law of wind temperature,wind speed and rock temperature on the distribution characteristics of air flow and temperature distribution was studied.The results show that the critical distance for effective ventilation of single-ended roadway is 7 m,and"8"shaped eddy current will be generated at the intersection of roadway,and the average temperature at the cross section of eddy cunent reaches the lowest value,exceeding 7 m,and local ventilation measures should be taken to improve the working environment.When refrigeration equipment is used for cooling,the distance between the refrigeration device and the driving operation point is less than 30 m,and the inlet air supply temperature is 20 ℃ to 25 ℃.For the thermal insulation material covering a certain thickness of the surrounding rock of the high-heat roadway,the heat dissipation of the rock wall tothe air flow can be reduced effectively.The research results can provide powerful theoretical support for the design of ventilation system and local cooling and cooling in high temperature deep mine.
high temperature deep wellventilation and coolinglocal ventilationdriving with one head
万方数据
维普
