不同损伤程度下岩石力学参数变化的声波测试

发布时间：2019-05-14 00:37

【摘要】：声波波速变化可有效表征岩体损伤程度。通过对岩样进行人工预损,利用声波检测标定岩样的不同损伤程度,然后通过三轴压缩试验来研究不同损伤程度下岩石的力学特性,建立了声波速度下降幅度与岩体力学参数变化幅度间的关系。研究表明,当岩样的声波速度下降5%~8%时,黏聚力c值降低15%~25%,内摩擦角?值则升高14%~32%,因此,用声波速度的下降幅度来描述岩体参数的变化是可行的。根据现场实测的岩体损伤区内的声波速度的变化值,可以从一定程度上估计岩体参数的跌落情况,从而更进一步地说明损伤区内岩体的承载力。
[Abstract]:The change of acoustic wave velocity can effectively characterize the damage degree of rock mass. Through artificial predamage of rock samples, acoustic wave detection is used to calibrate different damage degrees of rock samples, and then triaxial compression tests are used to study the mechanical properties of rock under different damage degrees. The relationship between the decreasing amplitude of acoustic velocity and the variation of mechanical parameters of rock mass is established. The results show that when the acoustic velocity of the rock sample decreases by 5% 鈮，

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