介绍了复合顶板是一种不稳定、难以管理的顶板,是由不同岩性岩层构成的直接顶顶板,是含有薄煤或炭质页岩等弱层的顶板。阐述了复合顶板冒顶的原因及存在的问题,提出了对复合顶板的管理办法和措施。 It is introduced that the composite roof is an unstable and unmanageable roof. It is a direct roof roof composed of different lithologic rock formations and is a roof with weak layers such as thin coal or carbonaceous shale. The reasons and existing problems of composite roof falling out are expounded, and the management methods and measures for composite roof are put forward.