摘要
采用岩石破裂过程RFPA数值分析系统对特定应力条件下岩石裂隙演化过程进行数值模拟,根据获得的不同应力状态下裂隙扩展的图片研究初始裂隙长度、裂隙数量对岩石裂隙分形维数的影响,根据岩石裂隙分维-应力曲线将岩石裂隙扩展演化过程分为五个阶段,分析不同阶段裂隙分形维数随岩石内部应力的演化特征,揭示初始裂隙几何要素对岩石裂隙分形维数的影响规律。所获得的理论成果,对于研究裂隙岩体在外界荷载作用下的裂隙扩展演化规律具有一定的参考价值。
In this paper,the influence of crack length and crack quantity on crack propagation under the specific stress states is studied using numerical test of rock failure RFPA.Crack propagation laws under the specific stress states are obtained based on a large number of numerical tests.The influence of crack length and crack quantity on crack fractal evolution in rock is studied by use of a large number of crack propagation images under different stress states.The crack propagation process is divided into five stages according to fractal dimension-stress curve and the fractal characteristics of crack evolution in different stages are analyzed.The influence of the initial crack geometry elements on the crack fractal dimension is revealed.Theoretical reference is provided for study of the crack propagation laws of cracked rock mass under the external load.
出处
《地下空间与工程学报》
CSCD
北大核心
2011年第6期1148-1152,共5页
Chinese Journal of Underground Space and Engineering
基金
国家自然科学基金项目(50874064
50904039
51008167)
关键词
裂隙长度
裂隙数量
分形维数
演化规律
crack length
crack quantity
fractal dimension
evolution laws
