Fusain samples from lignite and high-volatile bituminous coal were obtained by stripping. The morphological characteristics of the fusain samples and raw coal samples were observed under an optical microscope and scanning electron microscope. The pore structure characteristics of the samples were quantitatively characterized through high-pressure mercury injection and low-temperature liquid N₂ adsorption experiments. The results showed that the pore volume and pore specific surface area of the fusain samples from lignite were significantly larger than those of the fusain samples from high-volatile bituminous coal. The main pore types of fusain were macropores and mesopores. Compared with the raw coal samples, fusain from lignite was found to be more conducive to the occurrence of free gas, while that from high-volatile bituminous coal was more conducive to the occurrence of adsorbed gas and free gas. The types of macropores in both sets of fusain samples were similar, and mainly exhibited a tubular structure and multi-side opening similar to a tubular structure.The connectivity between the mesopores, part of the macropores and part of the transition pores were poor. Mechanical compaction causes the cell wall of fusain to break and fill the pores, and the mineral filling causes the pores narrow, which affects the pore structure to a certain extent. The results imply that the first coalification jump has little effect on the pore structure of fusain, whereas it has an obvious effect on the pore structure of raw coal.

通过汽提从褐煤和高挥发性烟煤中提取富沙因样品。在光学显微镜和扫描电子显微镜下观察岩藻因样品和原煤样品的形态特征。通过高压注汞和低温液态N ₂定量表征了样品的孔结构特征吸附实验。结果表明，褐煤岩藻酸钠样品的孔体积和孔比表面积显着大于高挥发性烟煤岩藻酸钠样品的孔体积和孔比表面积。岩藻素的主要孔类型是大孔和中孔。与原煤样品相比，褐煤岩藻聚糖更有利于游离气的产生，而高挥发性烟煤岩浆中的富桑因更有利于吸附气体和游离气的产生。两组fusain样品的大孔类型相似，主要表现为管状结构和类似于管状结构的多侧开口，中孔，部分大孔和部分过渡孔之间的连通性较差。机械压实导致岩藻聚糖的细胞壁破裂并充满孔，矿物填充使孔变窄，从而在一定程度上影响孔结构。结果表明，第一次煤化跃迁对岩浆岩的孔隙结构影响不大，而对原煤的孔隙结构影响明显。