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利用 CT专用岩石三轴试验加载设备 ,完成了单一裂隙花岗岩在卸围压应力作用下的损伤扩展规律 CT实时试验。得到非常清晰的裂隙花岗岩在卸围压破坏全过程中从裂纹发展、贯通到破坏等各个阶段的 CT图象。结果表明 ,已有裂隙与最大主应力方向的夹角角度对裂隙花岗岩的卸围压破坏裂纹的起裂和宏观破坏面的形成具有重要的影响 ,裂隙花岗岩在卸载条件下的破坏具有突发性。
Using CT special rock triaxial test loading equipment, the real-time CT real-time test of damage propagation law of single fissured granite under unloading confining compressive stress was completed. The CT image of each phase of the granite with very clear fissures, such as crack propagation and vandalism, was obtained in the whole process of unloading confining pressure failure. The results show that the angle between the existing fractures and the direction of the maximum principal stress has an important influence on the initiation and macro-failure planes of the unloading confining pressure fractures of fissured granite. The failure of fissured granite under unloading conditions is abrupt .