摘要
为了系统探讨煤自燃倾向性的影响因素,基于逐步回归分析方法,提出以煤样的工业分析参数、孔隙结构参数、官能团含量和燃烧活化能为自变量,燃点温度为因变量预测煤自燃模型,揭示煤自燃特性与微观结构间的关联。结果表明:6个煤样的孔隙分形维数平均值为2.770,孔隙结构较为复杂,煤氧反应时可以提供更多的吸附位点;XL3的燃点温度最低为486℃,燃烧活化能也最低,为82.01 k J/mol;燃点温度y=381.152-1.494S_(BET)+21.550I_(C-O),R^(2)=0.998,表明了BET比表面积和C—O峰强度可以解释燃点温度99.8%变化的原因,且C—O峰强度对燃点温度的影响更为显著。研究结果揭示了煤体孔隙比表面积与含氧官能团是控制自燃倾向性的核心因素,为煤自燃风险评估提供了理论依据。
To systematically explore the influencing factors of coal spontaneous combustion tendency,based on stepwise regression analysis method,a coal spontaneous combustion prediction model was established with industrial analysis parameters,pore structure parameters,functional group content,and combustion activation energy of coal samples as independent variables,and ignition temperature as the dependent variable,revealing the correlation between coal spontaneous combustion characteristics and microstructure.The results showed that the average fractal dimension of the pores in the six coal samples was 2.770,indicating a complex pore structure that can provide more adsorption sites during coal oxygen reactions;The lowest ignition temperature of XL3 is 486℃,and the lowest combustion activation energy is 82.01 kJ/mol;Ignition temperature y=381.152-1.494S_(BET)+21.550I_(C-O),R^(2)=0.998,This indicates that BET specific surface area and C-O peak intensity can explain 99.8%of the change in ignition temperature,and the influence of C-O peak intensity on ignition temperature is more significant.The research results reveal that the pore specific surface area and oxygen-containing functional groups of coal are the core factors controlling the tendency of spontaneous combustion,providing a theoretical basis for the risk assessment of coal spontaneous combustion.
作者
颜浩东
张渝
王福生
李亚欣
刘雨鑫
Yan Haodong;Zhang Yu;Wang Fusheng;Li Yaxin;Liu Yuxin(School of Emergency Management and Safety Engineering,North China University of Science and Technology,Tangshan 063210,China;Tangshan Key Laboratory of Mine Safety and Emergency Management,Tangshan 063210,China;Hebei Key Laboratory of Mining Development and Safety Technology,Tangshan 063210,China)
出处
《煤炭技术》
2026年第1期15-22,共8页
Coal Technology
基金
河北省高等学校科学技术研究资助项目(BJK2024101)
2024年度省属高校基本科研业务费(JJC2024079)。
关键词
自燃倾向性
官能团
孔隙
特征温度
活化能
spontaneous combustion propensity
functional groups
pore structure
ignition temperature
activation energy
