中文摘要：

以山东郓城煤矿深井破坏巷道为工程背景,在大尺度（1.0 m×1.0 m×1.0 m）真三轴模拟试验系统上再现其开挖卸荷效应的全过程,通过模型内部切片法获得深井巷道围岩无支护条件下的破坏模式和范围;借助自主研发的三维应力测试元件揭示深井巷道不同深度处围岩真实的加卸载应力路径与开挖前后应力状态,重点分析松动圈内外围岩主应力差的演化规律,并结合围岩破坏范围及模式对其机制进行探讨。

英文摘要：

In the engineering background of a failure deep mine roadways of in Shandong Yuncheng Mine,its excavation unloading whole process is physically simulated by the large scale（1.0 m × 1.0 m × 1.0 m） three-dimension test system.The failure patterns and range of surrounding rock of deep mine roadways with no support are obtained by the method of model thin section.Using the independent development testing elements for three-dimensional stress,the actual loading-unloading stress paths and stress states of surrounding rock in different depths of deep mine roadways are revealed,and the evolution law of deviatoric stress inside and outside of the broken rock zone are mainly studied.Based on the results of the failure patterns and range of surrounding rock,the evolution mechanism of deviatoric stress is initial explored.