为了对比分析两淮煤的孔隙结构特征的差异，以淮南矿区刘庄矿13煤和淮北矿区祁东矿7煤为研究对象，运用压汞法和低温液氮吸附法对其孔隙结构进行分析，采用分形理论对其孔隙结构进行了分形研究，对比分析了淮南淮北煤孔隙结构的差异。压汞结果表明，刘庄13煤总孔容和总比表面积分别为3.488 mL/g、0.020 m²/g，祁东7煤为4.926 mL/g和0.027 m²/g，祁东煤样孔容均更大。二者孔容均大孔孔容最大，中孔最小。低温液氮吸附结果表明，刘庄13煤微孔比表面积比为76.25%，微孔最为发育。祁东7煤小孔比表面积比为79.79%，小孔最为发育。分形分析表明两者均有分形特征，通过压汞孔隙数据分形，刘庄13煤和祁东七煤孔径大于100 nm的孔隙分形维数分别为2.805 6和2.756 7，通过对低温液氮吸附孔隙数据分形，刘庄13煤和祁东七煤孔径小于100 nm的孔隙分形维数分别为2.727 5和2.037 2，均处于2~3范围内。表明刘庄13煤孔隙结构更为复杂和不均匀，尤其在小孔和微孔范围内分形维数差异更大。可能与显微组分和矿物含量的差异有关，其中镜质组是煤中主要的气孔发育成分，含量与孔隙分形维数成正相关。壳质组和惰质组不是气孔发育的主要成分，两者含量与孔隙分形维数成负相关。矿物分布不均可能增加了煤孔隙结构的不均匀性和复杂性，因此两淮煤样中各矿物含量与分形维数均变现为正相关。

To compare and analyze the differences in pore structure characteristics of coal from Huainan and Huaibei, this study focuses on No. 13 coal from Liuzhuang Mine in Huainan mining area and No. 7 coal from Qidong Mine in Huaibei mining area. Using mercury intrusion porosimetry and low-temperature nitrogen adsorption methods, the pore structures were analyzed, and fractal theory was applied to study the fractal characteristics of the pore structures. The differences in pore structures between Huainan and Huaibei coals were compared and analyzed. The mercury intrusion results show that the total pore volume and specific surface area of No. 13 coal from Liuzhuang are 3.488 mL/g and 0.02 m²/g, respectively, while those of No. 7 coal from Qidong was 4.926 mL/g and 0.027 m²/g, respectively, with Qidong coal having a larger pore volume. Both coals show the largest pore volume in macropores and the smallest in mesopores. Low-temperature nitrogen adsorption results indicate that the specific surface area ratio of micropores in No. 13 coal from Liuzhuang is 76.25%, showing the most developed micropores. The specific surface area ratio of small pores in No. 7 coal from Qidong is 79.79%, showing the most developed small pores. Fractal analysis demonstrate that both coals exhibited fractal characteristics. From mercury intrusion data, the fractal dimensions of pores larger than 100 nm for No. 13 coal from Liuzhuang and No. 7 coal from Qidong are 2.805 6 and 2.756 7, respectively. From low-temperature nitrogen adsorption data, the fractal dimensions of pores smaller than 100 nm for No. 13 coal from Liuzhuang and No. 7 coal from Qidong are 2.727 5 and 2.037 2, respectively, all within the range of 2 to 3. This indicates that the pore structure of No. 13 coal from Liuzhuang is more complex and heterogeneous, especially in the range of small pores and micropores, where the fractal dimension differences are more significant. This may be related to differences in maceral composition and mineral content, where vitrinite is the main component for pore development in coal and shows a positive correlation with pore fractal dimensions. Exinite and inertinite are not primary components for pore development and show a negative correlation with pore fractal dimensions. Uneven mineral distribution may increase the heterogeneity and complexity of the coal pore structure, thus showing a positive correlation between mineral content and fractal dimensions in the two types of Huainan and Huaibei coal samples.