1. The result shows that the cleat density in coal bed varies in different microlithotype,and the occurrence of cleat is relevant to the grouping sequence of microlithotypes.
   结果表明,裂隙在不同显微煤岩类型煤体中的分布存在较大的差异,同时裂隙分布的位置与显微煤岩类型的组合序列有关。
2. The relationship between microlithotype and the distribution of cleat in coal bed is discussed through a case from Hedong coalfield, combining microstratigraphy and statistics methods.
   摘要综合利用显微地层学和统计学方法，以河东煤田中北部8＃煤层为例，研究了煤层显微煤岩类型与煤层裂隙分布的关系。

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