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从煤的微观结构入手,通过绝热氧化实验来模拟煤自燃过程中煤体自身氧化产热累积升温的阶段,并运用扫描电镜观察特征温度下煤样表面孔洞的变化。最后用有限元分析软件ANSYS数值模拟分析了煤孔洞周边温度场的分布规律,初步验证了煤质表面孔洞的产生可以用来表征煤自燃反应的可行性。
Starting from the microstructure of coal, the adiabatic oxidation experiment was used to simulate the stage of self-heating and cumulative heat-up of coal spontaneous combustion in spontaneous combustion of coal, and the change of pore on coal surface under characteristic temperature was observed by scanning electron microscope. Finally, the distribution rule of the temperature field around the coal hole was analyzed by the finite element analysis software ANSYS, and the feasibility of the coal spontaneous combustion reaction was preliminarily verified.