岩土力学Issue(7)：1863-1870,8.
含交叉裂隙节理岩体单轴压缩破坏机制研究
Uniaxial compression failure mechanism of jointed rock mass with cross-cracks
摘要
Abstract
The uniaxial compression failure mechanism of jointed rock mass with cross-cracks was studied through similar material uniaxial compression tests and numerical computation with Abaqus. The study results show that when the angle between the main crack and loading direction is at 35° or 45°, the main crack is the key crack of crack propagation and rock mass failure. At these cases the strength of rock mass with cross-cracks is higher than that of rock mass with single crack. The reason is that the maximum hoop stressσθmax of main crack tip is less than that of single crack. When the angle between the main crack and loading direction is at 0° or 90°, the secondary crack is the key crack of crack propagation and rock mass failure. When the angle between the main crack and loading direction is at 0°, the maximum hoop stressσθmax and the maximum stress intensity factor KⅡmax of most secondary cracks are higher than those of single crack. So at these cases the strength of rock mass with cross-cracks is lower than that of rock mass with single crack. The KⅡmax of the case with 45° between main crack and secondary crack is the maximum stress intensity factor in those cases that the angle between the main crack and loading direction is at 90°. So the strength of rock mass with 45° between main crack and secondary crack is the lowest one in this case group.关键词
节理岩体/交叉裂隙/破坏机制/起裂模式/相似材料Key words
jointed rock mass/cross-cracks/failure mechanism/initiation mode/similar material分类
矿业与冶金引用本文复制引用
张波,李术才,杨学英,王刚,张敦福,杨为民,李景龙..含交叉裂隙节理岩体单轴压缩破坏机制研究[J].岩土力学,2014,(7):1863-1870,8.基金项目
国家自然科学基金面上项目资助(No.51379114,51279095)；山东省自然科学基金青年基金资助(No. ZR2012EEQ007)；山东省矿山灾害预防控制国家重点实验室培育基地（山东科技大学）开放基金资助(No. MDPC2012KF04，No. MDPC2012KF07)；岩土力学与工程国家重点实验室开放基金(No. Z013004)。 （No.51379114,51279095）
