中文摘要：

为解决深部高应力大断面破碎围岩巷道支护难的问题，分析了不同支架断面形式随侧压系数的变化巷道围岩应力和位移的变化特征，以及双层工字钢梁的高度对承载受力大小影响特征．开发了适用于高应力大断面破碎围岩巷道拱形叠加底拱全封闭工字钢支架，该支架采用矿用工钢上下重叠并连接成整体的全封闭马蹄形结构，支架的整体承载能力比工字钢对棚提高了2．5倍以上．井下试验结果表明，拱形叠加底拱全封闭工字钢支架二次强力支护可以有效控制巷道围岩变形．

英文摘要：

To design high capacity support to deep large-section tunnel excavated in high-stress condition with fractured surrounding rock, for different section patterns of supports, the stresses and displacements of tunnel surrounding rock were analyzed with the change of lateral pressure coefficients. Particularly, the effect of height of double-layered I-section beam on the bearing capacity was investigated. As a result, an arched support with bottom arch superimposed and fully-closed I-section beam was developed with horse-shoe shaped structure. The bearing capacity of developed structure is 2.5 times higher than that of support using I-section beam. Underground field test shows that the deformation of the surrounding rock could be effectively controlled when the proposed secondary arched support is adopted.