【摘要】 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．更多还原

【Abstract】 This article introduces the classification and anti-inrjection nature of floors in provinces of Liaoning,Jinn,Heilongjiang and inner Mongolia.The relationship is analyzed between the deformation nature of floor rocks,anti-injection and the rock nature,rock classification in the floor and the basis for floor rock control is provided.更多还原