中文摘要：

基于固体热传导理论的非稳态温度场模型,采用实验模拟缓慢升温期的煤矸石山内部实际导热情况,利用有限差分法对煤矸石山深部温度进行解析并研究深部温度热传导规律。结果表明：距热源0.2 m深度范围内,温度急剧下降,温升幅度较大,而随着距热源的距离增加,温度下降至40℃左右,最后趋于外界稳定温度值20℃。利用有限差分法对模型进行解析,计算得出温度实测值与解析值的最大误差为8.56℃,最小误差仅为0.02℃,说明该模型解析精度较高,适用于自燃煤矸石山深部温度的解析与定量预测。

英文摘要：

Experiments were conducted to simulate the internal heat conduction of the coal gangue dump in the period of slow temperature rise with the unsteady state temperature field model which was based on the solid heat conduction theory,and analysis was made on the internal temperature of the coal gangue dump and study was carried out on the heat conduction rule of the internal temperature by using the finite difference method. The results showed that the temperature rapidly decreased and the temperature rise was larger in the range of 0. 2 m away from the heat source,but with the increase of the distance to the heat source,the temperature reduced to about 40 ℃ and finally it was close to the environmental temperature of 20 ℃. Analysis was made on the model by using finite difference method,it was obtained that the maximum difference between the measured values and the analytical values was 8. 56 ℃ and the minimum difference was only 0. 02 ℃,this indicated that this model had a higher accuracy and was suitable for the analysis and quantitative prediction of the internal temperature of the coal gangue dump.