一种测量岩石压缩裂纹扩展过程声波波速的连续测量方法

被引：9

作者：

张晓平 ^{[1
]}

王思敬 ^{[2
]}

刘泉声 ^{[1
]}

机构：

[1] 武汉大学土木建筑工程学院,岩土与结构工程安全湖北省重点实验室

[2] 中国科学院地质与地球物理研究所

来源：

工程地质学报 | 2018年 / 26卷 / 01期

关键词：

岩石压缩试验; 张拉裂纹; 裂纹扩展; 声波波速;

D O I：

10.13544/j.cnki.jeg.2018.01.010

中图分类号：

TU45 [岩石（岩体）力学及岩石测试];

学科分类号：

0801 ; 080104 ; 0815 ;

摘要：

中低围压或单轴压缩荷载条件下,可以将脆性岩石材料的裂纹扩展过程划分为原生裂纹压密、新生裂纹起裂并稳定扩展、不稳定裂纹扩展和交互贯通以及峰后5个主要发展阶段。含预制裂纹试样的直接观测法、应变监测、声发射(AE)监测、声波波速测试、CT(computerized tomography)扫描、微电镜观察等间接监测方法被用来研究裂纹起裂和扩展过程。本文基于在中、低围压以及单轴压缩荷载条件下,脆性岩石材料首先产生张拉裂纹,并优先沿加载方向发育的规律,提出采用声波波速连续测量方法进行岩石加载过程波速的连续观测,有助于分析裂纹扩展过程中声波波速的变化,为研究裂纹扩展过程提供一种间接测量手段。

引用

页码：91 / 96

页数：6

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