不同赋存深度大理岩应力波传播规律及动态弹性参数

Stress Wave Propagation Law and Dynamic Elastic Parameters of Marble with Different Occurrence Depth

基于锦屏深部大理岩赋存应力环境,开展了不同深度大理岩应力波传播规律研究,探索了不同深度大理岩复杂动态力学特性。结果表明,随着赋存深度增加,应力波纵、横波波速整体非线性增长,呈“增长较快—增长放缓—渐趋于0”趋势。可预测当赋存深度增大至某一值后,应力波纵、横波波速将几乎不受赋存深度变化影响,逼近于某一恒定值。大理岩动态弹性模量和泊松比均随赋存深度增加总体呈增大趋势,而后趋于稳定,表明岩石材料参数是非常数的。

Based on the existing stress environment of deep marble in Jinping,the propagation law of stress wave in different depths of marble is studied,and the complex dynamic mechanical properties of marble in different depths are explored. The results show that with the increase of the occurrence depth, the overall nonlinear growth of the longitudinal and shear wave velocity of stress wave shows a trend of " rapid growth-slow growth-gradually tending to 0".It can be predicted when the occurrence depth increases to a certain value,the longitudinal and shear wave velocities of stress wave will be almost independent of the occurrence depth change and approach a certain constant value. The dynamic elastic modulus and Poisson’s ratio of marble increase with the increase of occurrence depth,and then tend to be stable,indicating that the rock material parameters are not constant.