Considering the complementarity of synchrotron radiation SAXS and nano-CT in the pore structure detection range, synchrotron radiation SAXS and nano-CT methods were combined to characterize the nano- to micropore structure of two bituminous coal samples. In mesopores, the pore size distribution curves exhibit unimodal distribution and the average pore diameters are similar due to the affinity of metamorphic grades of the two samples. In macropores, the sample with higher mineral matter content, especially clay mineral content, has a much higher number of pores. The fractal dimensions representing the pore surface irregularity and the pore structure heterogeneity were also characterized by synchrotron radiation SAXS and nano-CT. The fractal dimensions estimated by both methods for different pore sizes show consistency and the sample with smaller average pore diameters has a more complex pore structure within the full tested range.

考虑到同步辐射SAXS和nano-CT在孔隙结构检测范围内的互补性，结合同步辐射SAXS和nano-CT方法来表征两个烟煤样品的纳米至微孔结构。在中孔中，由于两个样品的变质级的亲和力，孔径分布曲线呈现单峰分布，平均孔径相似。在大孔中，具有较高矿物质含量（尤其是粘土矿物质含量）的样品的孔隙数量要多得多。分形维数代表了孔表面的不规则性和孔结构的异质性，其特征还在于同步辐射SAXS和纳米CT。