实验变形煤结构的13C NMR特征及其构造地质意义

通过４件煤的高温高压实验样品及２件原始样品的＾１３Ｃ固体核磁共振研究，揭示了变形煤结构演化的微观机理及其与镜质组反射率光性变异的内在联系，阐明了不同应变环境中应力作用的差别在一定程度上控制了碳结构的演化，而镜质组反射率的差别正是煤结构差异的外在反映，因此，煤镜质组反射率光性组构真实地记录了煤变形历史中应力作用及应变环境特征，是煤田构造研究中极为重要的应变标志之一。

13C NMR CHARACTERISTICS OF STRUCTURES OF THE EXPERIMENTAL DEFORMED COALS AND THEIR SIGNIFICANCE OF STRUCTURAL GEOLOGY

The research of 13 C solid nuclear magnetic resonance (NMR) of four deformed coal samples of experiment under high temperature and confining pressure and two of their original samples reveals microcosmic mechanism of structural evolution of deformed coals and their inherent relationship with optical variation of vitrinite reflectance. It is expounded that the difference of stress in variations of strain environment controls the evolution of carbon structure to a certain extent and the difference of vitrinite reflectance is exactly the external reflection of divergence of coal structure. Therefore, the optical fabric of coal vitrinite reflectance really records characteristics of stress action and strain environment in deformation history of coal. The vitrinite reflectance is one of the very important strain indicators in research on coalfield structure.