The specific heat capacity (C_p), thermal conductivity (λ), and thermal diffusion coefficient (D) of coal gangue (CG) are the main factors that affect the self-ignition potential for heat transferring from burning center to the ground surface. In this paper, the thermophysical properties of CG were investigated by transient plane source method. The correlations and sensitivity analysis were performed to characterize the degree of influence of the thermophysical parameters (C_p, λ, and D) dependence on temperature. The mean values of C_p, λ, and D for CG were at a range of 0.73 − 0.89 J g⁻¹ K⁻¹, 0.44 − 0.76 W m⁻¹ K⁻¹, and 0.26 − 0.43 mm² s⁻¹, respectively. Compared with coal, CG were located in the low area (S_c < 2) with higher value of λ and D, but lower value of C_p. Results also showed that 70 °C was a critical point for CG at which some kinds of mutation took place in thermophysical properties. The comparison between the experimental data and the correlation outputs exhibited consistency.

煤石（CG）的比热容（C _p），热导率（λ）和热扩散系数（D）是影响热量从燃烧中心传递到地面的自燃潜力的主要因素。本文采用瞬态平面源法研究了CG的热物理性质。进行了相关性和敏感性分析，以表征热物理参数（C _p，λ和D）对温度的影响程度。C _p，λ和D的平均值用于CG是在一个范围内的0.73 - 0.89Ĵ克^-1  ķ ^-1，0.44 - 0.76脉冲W M ^-1  ķ ^-1，和0.26 - 0.43毫米^2个小号^-1分别。与煤相比，CG位于较低的区域（S _c <2），λ和D值较高，而C _p值较低。结果还表明，70℃是CG的临界点，在该临界点发生了一些热物理性质的突变。实验数据和相关输出之间的比较显示出一致性。