本文通进对 QY 系列液压支架的结构分析,探讨了立柱、平衡千斤顶等油缸损坏的原因。指出油缸设计应增加抗弯曲计算;QY 支架终究将被无顶粱支架所代替。 In this paper, the structural analysis of the QY series hydraulic support is carried out, and the reasons for the damage of the cylinder such as the column and the balance jack are discussed. It is pointed out that the cylinder design should increase the bending resistance calculation; the QY bracket will eventually be replaced by the roofless beam bracket.