Roof structure of short cantilever-articulated rock beam and calculation of support resistance in full-mechanized face with large mining height
Abstract：In order to solve the problems of strong strata behaviors and insufficient calculating basis of working resistance of support in fully-mechanized working-face with large mining height,the following strata behaviors were put forward by numerical simulation and site measurement：the bigger damage area,more serious rib spall,more abutment pressure peak,moving forward of roof facture line,increasing bed separation of roof.According to the new concept and distinguish basis,the structure of ＂short cantilever-articulated rock beam＂ and calculation formula of support working resistance were resulted.The theoretical research was applied to analysis the following facts：the length and thickness of immediate roof,the length and thickness of main roof,the bulking coefficient and stiffness of gangue,the application shows that the length of immediate and main roof plays the more important role.
Keywords：fully-mechanized face with large mining heightstructure of short cantilever-articulated rock beamworking resistanceabutment pressure
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)