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。
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.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2012年第A02期3811-3820,共10页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(51074162)
河南理工大学博士基金资助项目(B2012-048)
江苏省土木工程研究生科技创新基金资助
关键词
采矿工程
深井巷道
主应力差
演化规律
物理模拟
mining engineering
deep mine roadways
principal stress difference
evolution law
physical simulation
