煤镜质组反射率光性组构变形实验研究

EXPERIMENTAL RESEARCH ON DEFORMATION OF OPTICAL FABRIC OF COAL VITRINITE REFLECTANCE

不同煤级煤的高温高压实验表明，在温、压和差异应力作用下，煤镜质组反射率值和各向异性都有一定程度增加，变形越强烈，增加越明显，尤其在中煤级中、晚期阶段更是如此。在变形过程中，反射率主轴将发生有规律的偏转，变形越强烈，最小反射率主轴越接近于最大挤压应力方向。随着变形的增强，镜质组反射率椭球由单向伸长型向压缩型转化。

the experiments of coals with different ranks under high temperature and high pressure had been showed that under the action of high temperature and high pressure and differential stress,the reflectance values and anisotropies of coal vitrinites all increased in a certain degree The more violent the coal deformed,the more they increased,especially in the middle and stages of the middle rank coals In the deformation processes of the coals,the principal axes would rotated regularly The minimum principal axes of vitrinite reflectances were gradually closed to the directions of the maximum compression stresses The ellipsoids of the vitrinite reflectances were changed from the pattern of unidirectional extension to the one of unidirectional compression