Analysis Of Tunnel Heat-harm And Temperature Field Simulation In Coal Mine Area

This paper is based on the current situation of the forming of high temperature in deep coal mine and combing practical exploration and measurement to analyze the main heat source of tunnel heat harm in coal mining area and study specific calculating ways of quantity of heat of each heat source.In order to know well the distribution of the temperature in tunnels, this paper takes advantages of computer software-CFD-to simulate the changes of temperature field.On the basis of the numerical simulation theory, this paper simulates the distribution features of ventilating air flow field and temperature fielding in tunnels. Moreover, through studying the law of corresponding temperature distribution and comparison of the measured result underground, this paper proves mathematical model and computing procedure reasonable.With the idea of setting body models in tunnels, this study conducts simulation on temperature distribution around the bodies in coal mine tunnels. By adopting the thermal comfort evaluation indicator and analyzing the simulated temperature distribution around the bodies in tunnels, this study evaluates the thermal comfort of underground workers.For lowering temperature through ventilating has its limitation, this study solves mine heat harm problem by means of air conditioner. This paper analyzes every type of mine air conditioner system and its advantages and disadvantages and its range of application, and works out the chilling requirement of working face through calculating.This paper puts up with the concept of cooling separating area in tunnels, i.e. determining the specific cooling area according to the simulation result, which can avoid waste of huge amount of resources and energy.