不同变质类型煤的电子顺磁共振特征对比分析

通过对大别造山带前陆盆地石炭纪含煤岩系高煤级煤的电子顺磁共振分析,探讨了不同变质类型煤的芳香结构演化特征及其影响因素。结果表明高煤级煤的自由基浓度、线宽和兰德因子的演化具有较好的一致性,且随镜质体最大反射率的增大而呈规律性演化的趋势,构造应力作用促进和增强了环缩合作用和拼叠作用,有使煤超前演化的趋势。

Contrast Study on the EPR Characteristics of Coals of Different Metamorphism Types

Through electron paramagnetic resonance(EPR) analysis of high-rank coal samples from the Carboniferous coal located in the northern foreland basin of Dabie orogenic belt in the eastern China,the evolution characteristics of aromatic structures of coals of different metamorphism types and the effecting factors are studied.The result indicated that the evolution of the free radical density,the line width and the Lande factor demonstrates the good uniformity,and there is a regular tendency with the increasing of reflectance of vitrinite.The tectonic stress promotes and strengthens the aromatic ring polymerization and the aromatic layer superposition,and causes the tendency of leading evolution of coals.