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一、问题的引出随着矿井开采深度的增加,由于各种热源如岩石放热、空气压缩、矿物氧化和机械设备散热等的热作用,使得井下风流的温度、含湿量和热焓等参数发生了复杂的变化.其中风流与围岩温度场间的对流换热量是风流参数产生变化的主要原因.因此,风流流动与围岩温度场间的对流换热量的准确计算,对井下风流参数的预算有着十分重要的意义.风流与围岩温度场间的对流换热量Q_c按牛顿冷却公式计算:
First, the problem leads to With the increase in mine depth, due to a variety of heat sources such as rock exotherm, air compression, mineral oxidation and mechanical equipment such as the thermal effects of heat, making the downwind flow temperature, moisture content and enthalpy and other parameters Complicated changes have taken place, of which the convective heat transfer between the wind flow and the temperature field of the surrounding rock is the main reason for the change of the wind flow parameter.Therefore, the accurate calculation of the convective heat transfer between the wind flow and the surrounding rock temperature field, The parameter of the budget is of great significance. Convection heat flow between the wind and the surrounding rock temperature field Q_c according to Newton’s cooling formula: