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利用有限元分析的方法和理论,将不同结构的薄、厚柱窝对顶梁变形和应力的影响做对比分析,探讨适合大采高、大阻力液压支架的最佳柱窝结构。依据液压支架试验标准GB 25974.1—2010《煤矿用液压支架第一部分:通用技术条件》,选取了大采高液压支架柱窝受力最恶劣的工况———扭转工况进行有限元分析。通过对不同柱窝结构应力的分析及对比,找到了一种更适合大采高液压支架的柱窝结构,同时为改进柱窝结构的强度设计、提高柱窝的力学性能提供了依据和路线。
By using the method and theory of finite element analysis, the influence of thin and thick columns with different structures on the deformation and stress of roof beams is comparatively analyzed, and the best columnar structure suitable for large mining and high resistance hydraulic supports is discussed. According to hydraulic support test standard GB 25974.1-2010 “Coal Mine Hydraulic Support Part I: General technical conditions”, select the mining mining column hydraulic support the worst case --- torsion conditions for finite element analysis. By analyzing and comparing the stress of different plinth structures, a better plinth structure is found which is more suitable for the hydraulic support with large mining height. At the same time, it provides the basis and route for improving the strength design of plinth structure and improving the mechanical performance of the plinth.