针对两淮地区煤矿深部破碎软弱围岩支护的难点及其支护机制,设计研发自移式不反复支撑顶板液压支护支架。基于弹塑性力学建立数值分析模型,计算多工况下迈步过程中液压支架位移、应力、应变等力学参量。研究结果表明,在工况1时最大等效应力为245.33MPa,工况2时最大等效应力为246.82MPa,工况3时最大等效应力为245.27MPa。3种工况的最大应力值不超过材料的屈服强度,满足要求,支架能够正常进行支护作业。研究结果可以为全面评估液压支架可靠性、稳定性以及施工工艺优化提供理论依据。

 In response to the difficulties and support mechanisms of deep fractured and weak surrounding rocks incoal mines in the Two Huai River region, a self moving and non repetitive hydraulic support bracket for the roof wasdesigned and developed. A numerical analysis model based on elastic-plastic mechanics was established to calculatemechanical parameters such as displacement, stress, and strain of the hydraulic support during the stepping processunder multiple working conditions.The research results indicated that the maximum equivalent stress undercondition 1 was 245. 33 MPa, the maximum equivalent stress under condition 2 was 246. 82 MPa, the maximumequivalent stress under working condition 3 was 245. 27 MPa. The maximum stress values of the three workingconditions do not exceed the yield strength of the material, meeting the requirements, and the bracket can performsupport operations normally. The research results will provide a theoretical basis for the comprehensive evaluation ofthe reliability and stability of hydraulic supports, as well as for the optimization of construction processes.