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为了研究原始岩石试样的动态力学特性以及分析试样内部节理裂隙分布情况,首先通过理论分析,给出用纵波波速和横波波速表示的岩石的各种动态参数的表达式。应用全波形声发射仪搭建试验系统,将原始岩样沿长度方向等分为不同的分段,测定不同分段的纵波速度,依据纵横波速之间的关系求出横波速度,从而得到岩样沿长度方向不同分段的各种动态参数,根据这些参数的变化,定性讨论岩样沿长度方向的强度变化,以及内部的损伤变化情况。
In order to study the dynamic mechanical properties of the original rock samples and analyze the distribution of fractures in the joints, the expressions of various dynamic parameters of the rock, which are expressed by the longitudinal wave velocity and the shear wave velocity, are given first through theoretical analysis. A full-wave acoustic emission device was used to set up a test system. The original rock samples were divided into different sections along the length direction. The longitudinal wave velocities of different sections were measured. Based on the relationship between the longitudinal and transverse wave velocities, the shear wave velocity was obtained, According to the change of these parameters, the strength change along the length of the rock specimen and the internal damage changes are qualitatively discussed.