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基于煤结构演化特征及其地质意义在煤化作用研究中的重要性,采用X射线衍射分析、电子顺磁共振分析、显微傅立叶变换红外分析、高分辨率透射电子显微镜研究了特殊环境下形成的不同变形-变质类型的构造煤.结果表明:3类不同变形-变质类型煤具有显著的系统差异:尤以区域变质煤与另两类区分显著,叠加在高温之上的构造应力能够促进碳原子面网间距(d002)减小、基本结构单元(BSU)的延展度(La)和堆砌度(Lc)增大、促使BSU向稚理化发展;该实验条件下,构造-热变煤的d002较另两类煤平均减小了0.012nm左右,而La和Lc平均值则分别为另两类煤的近2倍和3倍左右.构造应力不仅影响物理煤化作用,而且在一定程度上可以导致煤有机大分子化学结构和化学组成的改变,对煤结构的演化具有超前效应.
Based on the importance of coal structural evolution and its geological significance in the study of coalification, X-ray diffraction, electron paramagnetic resonance, Fourier transform infrared spectroscopy and high resolution transmission electron microscopy were used to study the formation of Different metamorphic-metamorphic types of tectonic coal.The results show that three types of metamorphic-type coal have significant systematic differences: especially the regional metamorphic coal is significantly different from the other two types of tectonic stress superimposed on the high temperature can promote carbon atoms The decrease of d002 and the increase of La and Lc of BSU led to the development of BSU towards naive physics. Under the experimental conditions, the d002 of structural-thermal coal was higher than that of BSU The other two types of coal reduce on average about 0.012nm, while the average La and Lc respectively, the other two types of coal nearly 2 times and 3 times the tectonic stress not only affects the physical coalification, and to some extent can lead to coal Changes in the chemical structure and chemical composition of organic macromolecules have a leading effect on the evolution of coal structure.