摘要
通过砂岩的三轴试验，发现：在常温下，随着围压增加，多孔砂岩由脆性破裂转化为韧性碎屑流动；围压和孔隙在此转化过程中起了决定性的作用；砂岩脆性破裂是一个自组织过程，产生了分形的破裂面和分形分布的徽破裂；砂岩的韧性碎屑流动是砂粒内的微破裂的连续滑动；砂岩的韧性碎屑流动导致了孔隙的破裂。
hrough triaxial test,it is found that the deformation of porous sandstone is transited from brittle fracture to ductile cataclastic flow with the increasing of confining pressure at common temperature.Confining pressure and porosity play a key role in this transition.The process of sandstone fracture is a self-organized one,which produces the fractal fracture surface and fractal distribution of microfracture.Ductile cataclastic flow of sandstone is the continuous slide of microfracture inside the grains of sandstone.Ductile cataclastic flow of sandstone leads to the collapse of pores.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
1995年第5期63-68,共6页
Journal of Hohai University(Natural Sciences)
关键词
砂岩
脆性破裂
韧性碎屑流动
变形
三轴试验
sandstone deformation transition brittle fracture ductile cataclastic flow fractal
