煤矿安全2025，Vol.56Issue(3)：105-117,13.DOI:10.13347/j.cnki.mkaq.20240291
煤矸石自燃内在关键控制因素及危险性评价模型研究
Study on key control factors and risk assessment model of spontaneous combustion of coal gangue
摘要
Abstract
To study the physical and chemical reaction characteristics during the spontaneous combustion process,and analyze the key controlling factors of coal gangue spontaneous combustion,industrial analyzers,elemental analyzers,sulfur content testers,coal spontaneous combustion tendency testers,Fourier transform infrared spectrometers,and thermogravimetric analyzers are used to evaluate coal gangue from eight coal mines:QX(Qinxin),XS(Xinsheng),XZ(Xinzhuang)from Qinshui Coalfield,SJH(Sanjiaohe)from Huoxi Coalfield,FM(Fumin)and BPW(Baopingwan)from Dongsheng Coalfield,SGT(Shigeitai)from Shenfu Coalfield,and DYG(Dayugou)from Xinggong Coalfield,and a risk assessment model for coal gangue spontaneous combustion is established.The results show that FM,BPW,SGT,and DYG coal gangues have high ash content but relatively low volatile matter and fixed carbon,which is consistent with the elemental analysis results.Moreover,the spontaneous combustion mechanism of coal gangue is con-sidered to be a coupling of the coal combustion mechanism and pyrite combustion mechanism,with the essence of coal gangue spon-taneous combustion being an oxidation process.The pyrite sulfur content,physical oxygen absorption,and the content of aliphatic C-H active components are relatively higher in QX,XS,XZ,and SJH coal gangues.Thermogravimetric analysis reveals the ignition point temperature and the activation energy required for the thermal decomposition stage of the gangue;the BPW coal gangue has re-latively low ignition point temperature and activation energy for the thermal decomposition stage.The six key controlling factors for spontaneous combustion of coal gangue are thus identified:ash content,pyrite sulfur content,physical oxygen absorption,active functional group content(aliphatic C-H components),ignition point temperature,and activation energy of spontaneous combustion reactions.关键词
煤矸石/自燃/危险等级/控制因素/评价模型Key words
coal gangue/spontaneous combustion/risk level/controlling factors/assessment model分类
矿山工程引用本文复制引用
李奇繁,张玉龙,韩柏彬,张鑫,胡胜勇,周春山,张童,张宇..煤矸石自燃内在关键控制因素及危险性评价模型研究[J].煤矿安全,2025,56(3):105-117,13.基金项目
"十四五"国家重点研发计划政府间重点专项资助项目(2023YFE0103400) （2023YFE0103400）
中央引导地方科技发展资金资助项目(YDZJSX20231C005) （YDZJSX20231C005）
