College of Safety Science and Engineering, Xi’an University of Science and Technology
Mining Engineering Post-Doctoral Research Station, Xi’ an University of Science and Technology
Shaanxi Key Laboratory of Prevention and Control of Coal Fire, Xi’an University of Science and Technology
No. 1 Coal Mine, Shaanxi Shanmei Huangling Mining Co., Ltd.

为探究煤低温氧化过程中热量存储和传输特性，选取4种不同变质程度烟煤作为研究对象，利用激光导热仪测试4种煤样热物理参数的变化，并通过敏感性和关联性分析得出热物性参数受温度和工业分析指标的影响规律。结果表明：4种煤样热物性参数随温度的变化规律较为一致，随温度增大，煤样的热扩散能力先减小后增大，热储存能力先逐渐增大，随后达到饱和状态，低变质程度煤样的热储存能力在210℃后出现了下降的趋势，热传导能力在210℃前变化缓慢，210℃后出现快速增大趋势；热扩散系数、比热以及导热系数随温度的最大变化率分别为0.041%、0.498%以及0.067%,相比于热扩散系数和导热系数，比热对温度的敏感性最大；热扩散系数与工业分析指标间的关联性与导热系数的一致，二者受煤中灰分的影响比较大，比热的主要影响因素则为固定碳。研究结果对于揭示烟煤低温氧化蓄热机理具有重要的理论意义。

In order to explore the heat storage and transfer characteristics during the low-temperatureoxidation of coal, four bituminous coals with different metamorphic degrees were selected as the re-search objects. The thermophysical parameters of four coals were tested by laser thermal conductivityinstrument. Through sensitivity and correlation analysis, the influence of temperature and industrial analysis index on thermophysical parameters was determined. The results show that the variation of thethermophysical parameters of the four coals with temperature is relatively consistent. With the increaseof temperature, the thermal diffusion capacity first decreases and then increases, and the thermal storagecapacity gradually increases before reaching a saturation state. The thermal storage capacity of coalsamples with low metamorphism tends to decrease after 210 ℃. The thermal conductivity changes slow-ly before 210 ℃, and rapidly increases after 210 ℃. The maximum variation rates of thermal diffusion,specific heat, and thermal conductivity with temperature are 0. 041% , 0. 498% , and 0. 067% , respec-tively. Specific heat is most sensitive to temperature compared to thermal diffusivity and thermal con-ductivity. The correlation between thermal diffusivity and industrial analysis index is consistent withthermal conductivity. The thermal diffusivity and thermal conductivity are greatly affected by ash con-tent, and the main influencing factor of specific heat is fixed-carbon. The research results are of greattheoretical significance for revealing the thermal storage mechanism of coal low-temperature oxidation.

国家自然科学基金项目(52074215,52204239)；中国博士后科学基金项目(2022M722557)；陕西省自然科学基础研究计划项目(2022JQ-517)；

0 引 言
1 试验方法
1.1 煤样制备
1.2 试验测试过程
2 结果与讨论
2.1 煤热物理特性
2.1.1 热扩散特性
2.1.2 热储存特性
2.1.3 热传导特性
2.2 温度敏感性分析
2.3 关联性分析
3 结 论

[1]任帅京,张嬿妮,邓军,等.烟煤升温过程中热物理特性[J].西安科技大学学报,2023,43(04):697-704.

REN Shuaijing,ZHANG Yanni,DENG Jun,et al.Thermophysical properties of bituminous coal in heating [ J].Journal of Xi’an Uni-versity of Science and Technology,2023,43( 4):697-704.