摘要
在500MPa静围压下研究了多种岩石样品的三维纵波速和波速各向异性。岩石样品采自美国南加州Whipple山的不同地层。实验得到如下结果:1.岩石的纵波速各向异性是一个普遍的特征。2.岩石样品的三维纵波速均随围压的增加而增加,但增量大小的次序与围压无关。3.岩石的各向异性普遍随围压的增加而减小。4.岩石内层理被压缩是岩石各向异性随围压减小的主要原因。 本文还首次提出了波的振幅随围压加载和卸载变化的现象。
The author studied three compressional velocities and their anisctropy of multiple kinds of rocks under 500 MPa static confining pressure. The rock samples were collected from various strata of Whipple mountain, south California, USA. The experimental results are: 1. The anisotropy of the rock compressional velocity is a commen feature; 2. The 3-D compressional velocity of rock samples increases with the increase of the confining pressure, but the order of the incremental size is independent of the confining pressure; 3. The anisotropy of rocks com-nonly decreases as the confining pressure increases; 4. The inner-bedding of rocks compressed is the main cause of the rock anisotropy to decrease with the confining pressure.
出处
《地震》
CSCD
北大核心
1992年第2期39-43,共5页
Earthquake
