Evolution of stress-strain state in structured rock specimens under uniaxial loading

被引：21

作者：

Oparin, V. N. ^{[1
]}

Usol'tseva, O. M. ^{[1
]}

Semenov, V. N. ^{[1
]}

Tsoi, P. A. ^{[1
]}

机构：

[1] Russian Acad Sci, Siberian Branch, Chinakal Inst Min, Novosibirsk 630091, Russia

来源：

JOURNAL OF MINING SCIENCE | 2013年 / 49卷 / 05期

基金：

俄罗斯基础研究基金会;

关键词：

Rock mass; hierarchical block structure; laboratory experiment; speckle photography method; microstrains; deformation-wave processes; SIGN EXPLOSION RESPONSE; PENDULUM WAVES; PART I; FAILURE;

D O I：

10.1134/S1062739149050018

中图分类号：

TD [矿业工程];

学科分类号：

0819 ;

摘要：

The comprehensive experimental studies into the change in the stress-strain state of rock specimens subjected to uniaxial loading until failure, using the automated digital speckle photography analysis shows that when the stress reaches 50% of the limit strength of the specimens, low-frequency micro-deformation processes begin in the specimens under slow (quasi-static) stiff loading. The amplitude of the deformation-wave processes depends on the level of the pre-set macro-loading. Wave packets are plotted for averaged microstrains obtained in sandstone and marble specimens under uniaxial compression. Fourier transforms are used to define the amplitude-frequency characteristics of four micro-deformation stages: elastic, nonlinearly elastic, post-peak and residual strength stages. Elastic oscillations with frequency 0.5-4 Hz appear at the pre-failure stage and continue at the post-peak loading stage.

引用

页码：677 / 690

页数：14

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