The mechanical properties of rock salt under cyclic loading-unloading experiments

被引：42

作者：

Chen, Jie ^{[1
]}

Du, Chao ^{[2
]}

Jiang, Deyi ^{[1
]}

Fan, Jinyang ^{[1
]}

He, Yi ^{[1
]}

机构：

[1] Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Controls, Chongqing 400030, Peoples R China

[2] China Southwest Geotech Invest & Design Inst CO L, Chengdu 610052, Peoples R China

来源：

GEOMECHANICS AND ENGINEERING | 2016年 / 10卷 / 03期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

rock salt; triaxial; cyclic loading-unloading; deformation; damage; EXCAVATION DAMAGED ZONE; PERMEABILITY; DEFORMATION; BEHAVIOR; MODEL;

D O I：

10.12989/gae.2016.10.3.325

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Rock salt is a near-perfect material for gas storage repositories due to its excellent ductility and low permeability. Gas storage in rock salt layers during gas injection and gas production causes the stress redistribution surrounding the cavity. The triaxial cyclic loading and unloading tests for rock salt were performed in this paper. The elastic-plastic deformation behaviour of rock salt under cyclic loading was observed. Rock salt experienced strain hardening during the initial loading, and the irreversible deformation was large under low stress station, meanwhile the residual stress became larger along with the increase of deviatoric stress. Confining pressure had a significant effect on the unloading modulus for the variation of mechanical parameters. Based on the theory of elastic-plastic damage mechanics, the evolution of damage during cyclic loading and unloading under various confining pressure was described.

引用

页码：325 / 334

页数：10

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