Mechanical properties of sandstone under hydro-mechanical coupling

IF 5.8 4区工程技术 Q1 MECHANICS

Applied Rheology Pub Date : 2022-01-01 DOI:10.1515/arh-2022-0120

T. Tan, Yanlin Zhao, Xun Zhao, L. Chang, Sheng Ren

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引用次数: 19

Abstract

Abstract Study of mechanical properties of rock under hydro-mechanical coupling. The MTS815 rock mechanics system is used to perform triaxial compression tests of water-saturated sandstones under different confining pressures and pore water pressures. The results show that the peak deviation stress and its corresponding axial strain, residual deviation stress, initial deviation stress of dilation and deformation modulus of water-saturated sandstone are related to pore water pressure and confining pressure. They decrease with the increase of pore water pressure and increase with the increase of confining pressure. Poisson’s ratio and angle of rupture of water-saturated sandstone increase with pore water pressure. Based on the effective stress principle and Mohr–Coulomb criterion, the effective cohesion and effective residual cohesion of sandstone are 11.49 and 3.13 MPa, respectively, and the effective angle of internal friction and effective residual angle of internal friction are 38.32° and 25.32°, respectively. In addition, according to the variation relationship of sandstone strength, the relative strength criterion of sandstone under hydro-mechanical coupling is established.

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水-力耦合作用下砂岩力学特性研究

水-力耦合作用下岩石力学特性研究。采用MTS815岩石力学系统对含水砂岩在不同围压和孔隙水压力下进行了三轴压缩试验。结果表明:饱和水砂岩的峰值偏离应力及其对应的轴向应变、残余偏离应力、初始偏离应力、膨胀模量和变形模量与孔隙水压力和围压有关;它们随着孔隙水压力的增大而减小，随着围压的增大而增大。饱和水砂岩的泊松比和破裂角随孔隙水压力的增大而增大。基于有效应力原理和Mohr-Coulomb准则，砂岩的有效黏聚力和有效残余黏聚力分别为11.49和3.13 MPa，有效内摩擦角和有效残余内摩擦角分别为38.32°和25.32°。此外，根据砂岩强度的变化关系，建立了水-力耦合作用下砂岩的相对强度判据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Rheology 物理-力学

CiteScore

3.00

自引率

5.60%

发文量

审稿时长

>12 weeks

期刊介绍： Applied Rheology is a peer-reviewed, open access, electronic journal devoted to the publication in the field of applied rheology. The journal provides the readers with free, instant, and permanent access to all content worldwide; and the authors with extensive promotion of published articles, long-time preservation, language-correction services, no space constraints and immediate publication.