摘 要 煤自燃火灾所处的特殊环境，影响因素复杂，关联学科知识庞大，导致了煤层隐蔽火源的确定和煤自燃高温点移动规律的技术方法研究缓慢。所以将煤样热物性实验、煤自然发火实验以及多物理场数值模拟相结合对煤自燃过程高温点运移规律进行研究。 根据工业分析、元素分析研究了杭来湾煤样的煤质以及元素组成；根据热物性实验，研究了供风量大小对煤样的热扩散系数、比热容以及导热系数的影响，得到了煤样导热系数和比热容的拟合函数；根据煤自然发火实验，研究了供风量对高温点位置变化以及温度的影响，得到了煤自燃高温区域的迁移主要是由供风量、煤样的热物性和边界保温层温度等综合因素决定的，以及分别得到了煤自然发火实验的耗氧速率和放热强度的分段拟合函数；根据多物理场耦合作用的动力学原理建立了多场耦合的数学模型及相应的控制方程，同时验证了该模型的可信度，研究了不同进风位置、不同温差、导热系数、不同氧浓度对高温点运移规律的影响，得到了实验炉内最高煤温的位置主要沿中心轴附近变化，并随着煤样温度不断上升逐渐向下移动至进风侧方向，改变不同导热系数与边界温差条件会延长煤自燃升温实验时间。以及进气口不同氧浓度影响煤氧复合反应的速率，对低温阶段煤的氧化进程起到明显的抑制作用。同时对地下煤自燃高温点形成特点和煤自燃火源移动的规律具有重要指导意义。

ABSTRACT The special environment of coal spontaneous combustion is affected by complex factors, related knowledge of the subject, which leads to the determining of hidden fire and coal spontaneous combustion high temperature point of the technical rule of slow.So the the thermal properties of coal experiment, coal spontaneous combustion experiment and numerical simulation of multiphysical fields are combined to study the moving rule of high temperature point in coal spontaneous combustion process。 According to the industrial analysis and element analysis, the coal quality and element composition of the Hang Laiwan coal samples were studied. According to the thermophysical property experiment, the influence of the air supply volume on the thermal diffusivity, specific heat capacity and thermal conductivity of coal samples was studied. The fitting function of heat conductivity and specific heat capacity of coal samples was obtained. According to the experimental of coal spontaneous combustion, the effects of the air supply volume on the location of high temperature and temperature were studied, the moving of coal spontaneous combustion high temperature area is mainly determined by the factors such as the amount of air supply, the thermophysical properties of coal samples and the temperature of boundary insulation layer. and the coal spontaneous combustion rate of oxygen consumption and heat intensity fitting function. According to the dynamic principle of multi physical field coupling, the mathematical model of multi field coupling and the corresponding governing equations are established. and the reliability of the model is verified. Study on the different inlet position, different temperature, thermal conductivity, and different oxygen concentration effect on the high temperature point moving rule, the position of the highest coal temperature in the experimental furnace changes mainly along the central axis, and gradually moves down to the inlet side with the rising of the coal sample temperature . Changing the different thermal conductivity and the temperature boundary conditions will prolong heating of coal spontaneous combustion experiment time, And the different oxygen concentration in the inlet affect the rate of coal oxygen composite reaction, which can obviously inhibit the oxidation process of coal at low temperature. At the same time, it has important guiding significance for the high temperature point formation characteristics of coal spontaneous combustion, and the law of coal spontaneous combustion source movement.