单裂隙岩石损伤断裂过程的试验研究

Investigation on the damage-fractured process of single fractured rock

为了掌握单轴压应力作用下含单一初始损伤试件的变形特征与损伤特性,采用室内岩石压力系统和声发射监测试验,研究了单裂隙岩石损伤断裂过程。通过采用应力——应变曲线和声发射数共同识别类岩石材料损伤断裂特性的方法,可容易地观察到裂隙岩石的初始损伤、损伤演化和宏观裂纹的发展过程,给出了损伤演化阈值和全应力——应变曲线的损伤解释,针对试验曲线所表现出的损伤特性进行了损伤描述,为建立相应的裂隙岩体损伤本构方程和演化方程打下试验基础。

In order to understand the characteristics of deformation and damage evolution on a single fractured rock under uniaxial compression, the damage-fractured process of a single fractured rock is investigated using a rock mechanics testing system and a monitoring test on acoustic emission （AE）. The initial damage, damage evolution and fracture growth process of a single fractured rock can be observed from the stress-strain curve and the AE counting. Also, the investigation provides the damage evolution threshold value and the full stress-stain curve to interpret the damage. The study results provide an experimental foundation for establishing damage constitutive equation and evolution equation of fractured rock.