【摘要】 煤的孔隙和裂隙对于研究瓦斯与水在煤中的赋存状态和流动特性具有重要意义。文章调查和综述了煤的孔隙大小分级、孔隙成因及分类、裂隙的分类,分析了内生裂隙和外生裂隙的发育特征和影响其发育的因素、裂隙充填物的特性,得出了目前应用较为广泛的孔隙分类方法和成熟可靠的孔隙成因分类方法。更多还原

【Abstract】 The pore and crack in the coal would be very important to the research on the gas and water in the coal deposit status and the flow features.The had a investigation and statement on the pore size grading,the pore formation and classification and the crack classification of coal.The paper had an analysis on the development features of the internally occurred crack and the externally occurred crack and the factors affected to the crack development,as well as the features of the filled material in the crack.The present widely applied pore classification method and the matured reliable pore formation classification method were obtained.更多还原