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根据煤氧复合理论,基于热反应动力学参数的聚类评价技术指标,测试和分析了煤在自燃氧化过程中的生热总量、产热速率和热焓变化等参数的变化规律。结果为:氧化温度在68～83℃内,煤自燃氧化产热速率加速增加,化学反应作用不明显;煤自燃氧化的焓变随反应温度升高逐渐增大,从反应初始阶段的18kJ/mol,逐渐增加到80℃时的300kJ/mol。实验结果为煤自燃危险性的综合分析评价指标体系的建立提供了技术支持,并在抑制矿井生产过程中由于煤炭自燃引发的恶性事故方面具有显著的现实意义。
According to the theory of coal-oxygen recombination and the clustering evaluation index based on the kinetic parameters of thermal reaction, the variation regularities of total heat generation, heat-production rate and enthalpy change of coal during spontaneous combustion were tested and analyzed. The results showed that the oxidation reaction temperature increased from 68 ℃ to 83 ℃, and the spontaneous combustion rate increased with the increase of reaction temperature, but the chemical reaction was not obvious. The enthalpy change of spontaneous combustion increased gradually with the increase of reaction temperature. From the initial reaction stage of 18kJ / mol , Gradually increasing to 300kJ / mol at 80 ° C. The experimental results provide technical support for the establishment of a comprehensive evaluation index system for the danger of spontaneous combustion of coal, and have significant practical significance in suppressing the accidents caused by spontaneous combustion of coal in the process of mine production.