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基于相似理论搭建矿井通风降温模拟实验台,利用控制变量法进行实验,测得不同条件下围岩与风流间的对流换热系数,以围岩与风流对流换热系数作为主序列,以围岩温度、风流温度、风流速度作为子序列,利用灰色关联度分析方法得到不同影响因素与对流换热系数的关联程度。研究结果表明,在所选取的围岩温度、风流温度、风流速度3个子序列中,风流速度与围岩对流换热系数的关联度最大,其次是风流温度,围岩温度对其影响最小。在矿井通风降温系统的设计中应尽可能地增加风流速度。
Based on the similarity theory, a simulation experiment platform for mine ventilation and cooling was set up. The control variable method was used to test the convective heat transfer coefficient between surrounding rock and wind flow under different conditions. Taking the convective heat transfer coefficient of surrounding rock and wind flow as the main sequence, Temperature, wind temperature and wind speed as sub-series, the correlation between different influencing factors and convection heat transfer coefficients was obtained by using gray relational analysis method. The results show that among the three subsequences of surrounding rock temperature, wind temperature and wind velocity, the correlation between wind velocity and convective heat transfer coefficient of surrounding rock is the largest, followed by wind flow temperature, and the influence of surrounding rock temperature is the least. Ventilation cooling system in the mine design should be as much as possible to increase the wind speed.