摘要
为了探究深部矿井岩浆侵入对煤自燃特性的影响,利用红外光谱实验和热重实验对比研究了岩浆侵入煤和原煤的微观官能团和自燃过程变化,并计算了二者不同氧化阶段的动力学参数。结果表明:岩浆侵入煤的芳香烃化合物,缔合氢键和-OH(游离)呈下降趋势,而脂肪烃化合物和含氧官能团中的-OH、-C-O-C-、-C=O、-COOH基团含量均不同程度的升高;原煤与岩浆侵入煤的自燃过程均可分为水分蒸发、吸氧增重、分解燃烧3个阶段;相较于原煤,岩浆侵入煤的质量峰值温度和燃点温度降低,干裂温度、失重速率峰值温度和燃尽温度升高;此外,水分蒸发和分解燃烧阶段岩浆侵入煤的活化能小于原煤,说明此阶段岩浆侵入煤更易与氧气发生反应。
In order to explore the influence of magmatic intrusion on coal spontaneous combustion characteristics in deep mines,the micro functional groups and spontaneous combustion process changes of magmatic intrusion coal and raw coal were compared and studied by infrared spectrum experiment and thermogravimetric experiment,and the kinetic parameters of the two at different oxidation stages were calculated.The results show that the aromatic hydrocarbon compounds,associated hydrogen bonds and-OH(free)in magmatic intrusive coal show a decreasing trend,while the contents of-OH,-C-O-C-,-C=O and-COOH groups in aliphatic hydrocarbon compounds and oxygen-containing functional groups increase in varying degrees.The spontaneous combustion process of raw coal and magmatic intrusive coal can be divided into three stages:water evaporation,oxygen absorption and weight gain and decomposition combustion.Compared with raw coal,the mass peak temperature and ignition point temperature of magmatic intrusive coal decrease,while the dry cracking temperature,weight loss rate peak temperature and burnout temperature increase.In addition,the activation energy of magmatic intrusive coal in the stage of water evaporation and decomposition combustion is less than that of raw coal,indicating that the magmatic intrusive coal is more likely to react with oxygen in this stage.
作者
宁振凯
高函
赵炬
NING Zhenkai;GAO Han;ZHAO Ju(College of Coal and Chemical Industry,Shaanxi Energy Institute,Xianyang 712000,China;Xi’an Heavy Equipment Weiken Electric Co.,Ltd.,Xi’an 710016,China)
出处
《煤矿安全》
CAS
北大核心
2023年第9期66-72,共7页
Safety in Coal Mines
基金
陕西省教育厅一般专项科研计划资助项目(22JK0324)
陕西能源职业技术学院青年专项资助项目(2021QN02)。
关键词
煤自燃
岩浆侵入
官能团
热重
动力学
coal spontaneous combustion
magmatic intrusion
functional group
thermogravimetry
kinetics
