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根据回采工作面移动边界的特点，建立了动坐标下的围岩导热微分方程，研究了该方程的无因次形式；在大量计算结果的基础上，分析了煤岩平均热物理参数的计算式；给出了回采工作面围岩不稳定换热准数随各无因次参数的变化曲线和不稳定换热系数的计算式．
According to the characteristics of the moving boundary of mining face, the thermal differential equation of surrounding rock under dynamic coordinates is established and the dimensionless form of this equation is studied. Based on a large number of calculation results, the calculation formula of average thermal physical parameters of coal and rock is analyzed The formula of unsteady heat transfer of surrounding rock with various dimensionless parameters and calculation formula of unstable heat transfer coefficient are given.