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为了得到具有地下水渗流的矿井围岩内部传热规律,基于等效连续介质渗流模型,建立矿井巷道裂隙密集性围岩渗流和传热耦合模型,应用COMSOL Multiphysics有限元分析软件,实现了矿井巷道裂隙围岩温度场的分布模拟,并分析了矿井通风时间、围岩孔隙率、围岩渗透率、固体导热系数、围岩初温和通风温度对温度场分布的影响。结果表明:通风时间增加会使得调热圈半径增大;在孔隙率较大时,孔隙率越大越有利于换热,孔隙率较小时,孔隙率越小越有利于换热;渗透率越大、固体导热系数越大和通风温度越低越有利于换热。固体导热系数、原始岩温及通风温度对围岩调热圈半径影响不明显。
In order to obtain the internal heat transfer law of mine surrounding rock with groundwater seepage, based on the equivalent continuous medium seepage model, the seepage and heat transfer coupling model of mine tunnel roadway with dense rock mass is established. COMSOL Multiphysics finite element analysis software is used to realize mine tunnel crack The distribution of temperature field in surrounding rock is simulated. The influence of ventilation time of mine, surrounding rock porosity, surrounding rock permeability, solid thermal conductivity, initial temperature of surrounding rock and ventilation temperature on the distribution of temperature field are analyzed. The results show that: the increase of ventilation time will increase the radius of the heat transfer coil; when the porosity is larger, the larger the porosity is, the more conducive to heat transfer. When the porosity is smaller, the smaller the porosity is, the more conducive to heat transfer; , The greater the solid thermal conductivity and the ventilation temperature is lower the more conducive to heat exchange. Solid thermal conductivity, the original rock temperature and ventilation temperature have no significant effect on the radius of surrounding rock heating circle.