针对回撤掩护支架的使用要求,设计出大缸径双伸缩立柱。通过立柱模型,研究了大缸径双伸缩立柱的强度计算方法,完成对立柱缸筒、活柱稳定性及强度计算校核,其计算方法能为相关的设计提供理论依据。 For the use of retractable shield support requirements, design a large bore double telescopic column. Through the column model, the calculation method of the strength of the double-telescopic column with large bore is studied, and the calculation and verification of the stability and strength of the column cylinder and the column are completed. The calculation method can provide the theoretical basis for the related design.