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采集了开平煤田南东翼3对矿井深部不同煤体结构的8个煤样。基于压汞试验,结合数理统计理论,绘制了煤样各孔径阶段的孔容累积曲线与概率值累积曲线,分析了煤样的孔隙结构特征。研究表明,碎粒煤与原生结构煤的孔隙结构及连通性有很大差异,碎粒煤大孔隙较原生结构煤发育,而中孔所占百分比小于原生结构煤。
Eight coal samples of different coal body structures in the deep mine of coal mine were collected from the South East Wing of Kaiping Coalfield. Based on the mercury intrusion test and mathematical statistics theory, the cumulative pore volume curve and cumulative probability curve for each pore size phase of coal sample were plotted, and the pore structure characteristics of coal samples were analyzed. The results show that the pore structure and connectivity of crushed coal are quite different from those of primary structure coal. The macropores of crushed coal are more developed than those of primary structural coal, while the percentage of mesopores is smaller than that of primary structural coal.