受力岩石密度损伤增量及其数字图像

用ＣＴ图像定量分析岩石受力损伤破坏过程的难点，是难以知道岩石内部的绝对密度变化量。提出了密度损伤增量的新概念，推出了ＣＴ数与密度损伤增量的定量关系式，并把ＣＴ图像转换成密度损伤增量图像。通过与基于灰度变化的传统的ＣＴ图像分析方法比较，说明密度损伤增量图像的优越性在于不仅可定量分析受力岩石的损伤破坏过程，而且图像本身具有明确的物理意义。

The Density Damage Increment and Its Digital Image of Rock in Compression

It is difficult to detect the absolute density of rock by CT image in quantitative analysis of rock damage process in compression. This paper presents a new concept concerning the density damage increment and deduces a quantitative relation formula between CT value and density damage increment, on the basis of which CT image is converted into density damage increment images. In compration with the traditional CT image analysis method based on the variation in gray scale, the advantages of the density damage increment image lie not only in the quantitative analysis of damage process of rock in compression but also in the definite physical sense of image itself.