摘要
在构造煤显微结构分析的基础上,利用红外光谱、拉曼光谱和XRD测试手段分析了不同变形程度低中阶和中高阶烟煤分子结构演化特征,并探讨了构造煤变形过程中发生的动力变质作用.研究结果表明:随变形程度的增加,低中阶和中高阶烟煤分子结构参数变化规律具有相似性,但各光谱参数的变化强度存在差异.低中阶烟煤,弱变形阶段动力变质作用不具有明显提高煤体变质程度的能力;强变形阶段动力变质效应增加,促进煤体高变质程度升高.中高阶烟煤,弱变形阶段光谱结构参数变化强度小于低中阶烟煤,原因在于变质作用导致煤体有机质结构的应力敏感度降低;强变形阶段动力变质作用加速煤分子缩聚,表现为芳香结构含量快速增加且尺寸增大.
Based on the microstructure of deformed coal,the molecular structure characteristics of low-middle and middle-high rank deformed coal with different deformation degree were analyzed using FTIR,Raman and XRD,and dynamic metamorphism during the tectonic deformation was discussed.The results show that the structural parameters of low-middle and middle-high rank deformed coals show similar changes with the increase of deformation degree,but there are differences in the intensity of the spectral parameters.For low-middle rank deformed coal,the dynamic metamorphism in the weak deformation stage has no obvious ability to improve the metamorphism degree of coal,while in the strong deformation stage,the dynamic metamorphism effect increases rapidly,and promotes the metamorphism degree of coal.For middle-high rank deformed coal,the change intensity of the spectral structural parameters in the weak deformation stage is lower than that of the low-middle rank deformed coal.This is because the metamorphism causes the stress sensitivity of the coal organic matter to decrease.The dynamic metamorphism in the strong deformation stage accelerates the coal polycondensation,which shows that the aromatic structure content increases rapidly and the size enlarges.
作者
郭德勇
郭晓洁
刘庆军
孙向成
GUO Deyong;GUO Xiaojie;LIU Qingjun;SUN Xiangcheng(Institute of Resources and Safety Engineering,China University of Mining&Technology(Beijing),Beijing100083,China;Shoushan No.1Mining,Henan Pingbao Coal Mining Co Ltd,Xuchang,Henan452670,China;College of Geoscience and Surveying Engineering(Beijing),Beijing100083,China)
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2019年第5期1036-1044,共9页
Journal of China University of Mining & Technology
基金
国家自然科学基金重点项目(41430640)
国家自然联合科学基金重点项目(U1704242)
关键词
烟煤
构造煤
分子结构
动力变质
bituminous coal
deformed coal
molecular structure
dynamic metamorphism
