中文说明:
根据前人研究成果可以证明,煤镜质组反射率各向异性对煤田构造特征具有指示意义,镜质组最小反射率可以指示构造主应力方向。然而,在实际测量中,如何得到真正的镜质组最大、最小反射率及其方位是其中的关键环节。利用现有的岩石有限应变椭球拟合方法进行镜质组反射率椭球体拟合不失为一种行之有效的方法,可以由此确定镜质组最大、最小、中间反射率及其三维空间方位。 将之前拟合得到的反射率椭圆看作岩石有限应变椭圆即二维应变,其由之前的统计方法测定得到,三个截面的数据对于拟合唯一应变椭球来说是过多的,因此不可避免出现误差,导致三个截面应变椭圆不通过同一个椭球的情况。为了从三个截面数据得到唯一的应变椭球,需要对得到的数据进行相容性调整。采用Oertel的方法,从每一测量参数在不同截面中的值是正态分布这一假定出发,利用加权最小二乘法进行误差调整。
English Description:
According to the previous research results, it can be proved that the reflectance anisotropy of coal vitrinite has an indicative significance for the structural characteristics of coal field, and the minimum reflectance of vitrinite can indicate the direction of structural principal stress. However, in the actual measurement, how to get the true maximum and minimum reflectance of vitrinite and its orientation is the key link. It is an effective method to use the existing finite strain ellipsoid fitting method for vitrinite reflectance ellipsoid fitting, which can determine the maximum, minimum and intermediate reflectance of vitrinite and its three-dimensional spatial orientation.