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平行或垂直岩石层理进行单轴向加载直至样品破坏强度的95%左右稳压,在充水或不充水时,观测到的干燥样品及饱和样品内部P波速度的变化特征如下: 1.样品临破坏前P波速度在垂直与平行岩石层理方向上的变化具有很大的差异性。2.P波振幅及波形也随着应力的不断增加而发生变化。
Parallel or vertical rock stratification is uniaxial loading up to about 95% of the rupture strength of the sample. The characteristics of P wave velocities observed in the dry and saturated samples with or without water filling are as follows: 1. The variation of P-wave velocity before and immediately before the sample collapse in the direction perpendicular to the bedding plane is quite different. 2.P wave amplitude and waveform also with the increasing stress changes.