【摘要】 介绍了节理岩体中开挖洞室并加以锚固的模型试验。模型尺寸为180cmX140cmX15cm。共研究对比了14个不同工况。其变换因素为：两相互为正交的节理组具有不同倾角；不同节理间距；不同初始地应力和施加锚杆或不施加锚杆。结果表明，围岩变形主要受节理变形控制而垮落区则完全由开挖自由面与不连续面的不利组合所制约。岩锚可以显著地减少围岩变形和破坏。最后，用离散元方法对一个试验工况做了数值计算对比分析。更多还原

【Abstract】 This paper deals with large-sized simu1ation tests concerning opening-excavation in a jointed rockmass and bolt-reinforcement of the opening. The testing model has sizes of 18Ocm X 140cm X 15cm and is tested under 14 different working conditions. The varying factors of these conditions are: dip of two orthogo-nal joint sets, joint spacing, initial stress field, installing or not installing bolt-anchoring. The results indi-cate that the deformation of rockmass is mostly governed by the deformati0n of joints and the collapsing areasof surrounding rocks are complete1y dependent on disadvantage combination of free excavating surfaces and discontinuities surfaces. Rock bolts can lower the level of deformation and failure of surrounding rocks great-ly. A result of numerical analysis using DEM for a working condition is given.更多还原