【摘要】 岩体是一种含有大量缺陷的天然材料,其中的断层、裂缝和裂隙称为高层次缺陷,微裂隙、孔隙等称为低层次缺陷。首先分析包含宏观和微观裂隙的岩石裂隙数量与尺度之间的分形关系,并按照裂隙尺度进行分级。然后采用数值试验方法,通过逐级增加裂隙,研究岩体裂隙尺度对其变形与破坏的控制作用。研究结果表明,当裂缝、裂隙、微裂隙、孔隙等不同尺度、不同层次缺陷并存时,高层次缺陷对岩体的变形、稳定、破坏起着主导控制作用。更多还原

【Abstract】 Rock mass contains large-scale deficiencies,such as pores,fissures and faults,which are usually referred to rock defects.Faults,cracks and fissures are called high-level defects,micro-cracks,pores are called low-level defects.Rock defects of rock deformation and the damage control will have close relationship with different fissure scales.The relationship of quantity and scale of rock mass fissure is analyzed,including great crack and microcosmic fissure.Then with numerical simulation,it is found that the fractures of rock samples will increase gradually;and the control effects from microcosmic fracture scale to deformation and the rock mass failure are studied.The result indicates that the arrangement defect controls the deformation,stability and rock mass failure when the scales of crack,fissure,cavity,spacing,hole are coexisting in rock masses.更多还原