为研究掩护式液压支架顶梁承载特性及其对顶板载荷的适应性,基于空间载荷对称假设构建了单区承载条件下液压支架全高度范围载荷平衡区力学模型,分析了液压支架顶梁载荷平衡区分布特征及其影响因素。随后结合液压支架实际工况,分析了双区承载条件下液压支架顶梁极限平衡条件,进一步拓展了平衡区理论。最后运用ADAMS构建了液压支架的多体动力学模型,分别对液压支架单区、双区承载工况进行了模拟。通过与理论的对比分析表明,改善液压支架承载条件、合理优化平衡千斤顶及立柱参数等均可有效提高掩护式支架顶梁对顶板的适应性。

To study the supporting performance of two-legged shield support and its canopy adaptability to the roof,the mechanical model of load equilibrium region under single region loading condition was constructed. This paper ana- lyzed the distribution characteristics of the canopy load equilibrium region during full-height range and studied its in- fluential factors. Subsequently,combined with the actual conditions of the supports,the paper analyzed the limit load e- quilibrium condition of canopy under double region loading condition,which further extended the theory of canopy e- quilibrium region. Finally,the multi-body dynamic model of a hydraulic support was constructed by using ADAMS,the single and double region loading conditions of the hydraulic support were simulated respectively. By comparing with the theory,it shows that improving the loading condition of the hydraulic support,optimizing the parameters of the e- quilibrium jack and the legs can improve the adaptability of the shield support effectively.