 This study examined the pore structure of coal-measure sedimentary rocks using mercury-intrusion porosimetry, MIP, and nuclear magnetic resonance, and MR. It found that sandstones SS1 and SS2 were dominated by nanopores ranging from 0.01 to 1 m and 1 to 10 m respectively, while clays had larger pores ranging from 0.01 to 10 m. Additionally, the fractal characteristics of the investigated rock samples showed a prominent multifractal characteristic, with the dispersion dimension, DA, representing the surface structure of micropores and the diameter dimension, DS, representing the pore structure of macropores. Furthermore, multivariate linear regression models of adsorption pores and seepage pores were established, which had a better correlation effect on the multifractal dimension. This article was authored by Na Zhang, Shui Dong Wang, Xin Zhang Sun, and others.