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中文摘要：
在对煤系地层泥岩样进行显微CT无损伤探测及其图像分析的基础上,用Matlab语言对岩石孔隙结构（孔隙孔径和孔隙率）的算法进行了研究。结果表明：显微CT扫描、数字图像处理和三维重构三者的结合为岩石类材料孔隙结构的定量研究提供了一种简单可行的新方法。对显微CT试验得到的CT单张横截面图像进行数字图像处理,计算出了基于CT单张图像的岩石孔隙率。对CT单张横截面图像进行压缩,生成不同分辨率的新图像,以新图像的像素大小作为孔径尺度,确定了基于CT单张图像的岩石孔径尺度和孔隙率之间的变化规律。将CT单张图像进行处理生成CT图像序列,用可视化重构算法中的体绘制算法对其进行三维重构,生成岩石的三维数字图像,计算了基于CT图像序列的岩石孔径、孔隙率及其二者之间的变化规律。以煤系地层中的泥岩为例,泥岩的孔隙率随孔径尺度的增加呈负指数规律减少,其计算结果与压汞法测定的孔径分布相吻合。
英文摘要：
The clay rock in coal stratum is scanned non-destructively by micro-CT,and the algorithm of rock pore structure（the porosity and the pore aperture） is studied by use of Matlab based on the micro-CT image.The results show that the combination of micro-CT scanning,digital image processing and three-dimensional reconstruction can provide a new,simple and feasible method for the analysis of rock pore structure.The computer system of micro-CT experiment can generate CT single section and the porosity of rock is calculated by use of digital image processing.The new images with different resolutions are generated by image compression.When the pixel sizes of the new images are taken as the pore aperture,the rules of the rock porosity variation with the pore aperture are estimated on micro-CT single image.The volume rendering algorithm of visualized reconstruction can make the sequences which stem from the single image generate three-dimensional digital image,by which the rock porosity and the pore aperture are computed.For example,with the increase of the pore aperture,the porosity of clay rock in coal stratum is reduced by the negative exponent rule,and the result is identical with the aperture distribution measured by mercury porosimeter method.
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