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本文介绍了辽宁、吉林、黑龙江以及内蒙各矿务局主采煤层底板的抗压入特性和底板分类；分析了底板岩层的变化特征，底板抗压人特性与岩性、岩层类别的关系。从而、为回采工作面底板岩层控制提供依据．
In this paper, the compressive intrusion characteristics and floor classification of main coal seam floor in Liaoning, Jilin, Heilongjiang and Inner Mongolia Bureau of Mines are introduced. The variation characteristics of floor rock, the characteristics of floor compression and lithology and rock type are analyzed. Thus, it provides the basis for the control of floor rock strata of working face.