Creep, damage and failure around large rectangular-like caverns and galleries

Cristescu, N.; Paraschiv, I.

doi:10.1002/(sici)1099-1484(199604)1:2<165::aid-cfm9>3.0.co;2-4

Cited by 8 publications

(6 citation statements)

References 24 publications

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“…Paul [2] researched the creep properties of four types of rock salt. Hunsche [3,4] and Cristescu [5,6] employed diversified loading methods to conduct research on rock salt properties in multiple creep stages. Chan et al [7,8] applied continuum damage mechanics in the creep analysis of rock salt to study the unelastic flow caused by damage from the transition of creep stage to the damage accumulation in accelerated creep stage and to the final destruction process.…”

Section: Prefacementioning

confidence: 99%

A Nonlinear Creep Model of Rock Salt and Its Numerical Implement in FLAC^3D

Liu

Yang

Wang

2015

Advances in Materials Science and Engineering

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Creep characteristics are integral mechanical properties of rock salt and are related to both long-term stability and security of rock salt repository. Rock salt creep properties are studied in this paper through employing combined methods of theoretical analysis and numerical simulation with a nonlinear creep model and the secondary development in FLAC3Dsoftware. A numerical simulation of multistage loading creep was developed with the model and resulting calculations were found consequently to coincide with previously tested data.

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Section: Prefacementioning

confidence: 99%

A Nonlinear Creep Model of Rock Salt and Its Numerical Implement in FLAC^3D

Liu

Yang

Wang

2015

Advances in Materials Science and Engineering

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“…Compression tests and acoustic emission monitoring were conducted on glauberite rock by researchers to show its deformation and failure characteristics [1][2][3][4]. The effects of stress and temperature on mechanical properties have been studied [5][6][7][8][9]. It has been proposed that the AE number and energy can provide important parameters for predicting the failure of glauberite rock [10].…”

Section: Introductionmentioning

confidence: 99%

Effects of Hydrostatic Dissolution and Seepage on the Transport and Mechanical Properties of Glauberite

et al. 2022

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During the development of urban underground space in Chengdu, China, it was found that glauberite rocks in the Guankou formation of the Cretaceous system had extensive dissolution and exerted a serious impact on the safety of the project. At present, research on the transport and mechanical properties of glauberite under hydrostatic conditions in this area is limited. In this paper, the effects of hydrostatic dissolution and seepage on the transport and mechanical properties of glauberite are studied. The results show that the concentration of aqueous solution increases step by step with the increase in the dissolution time of glauberite in still water, indicating that the forward movement of the dissolution front of glauberite rock is not a continuous process and has intermittent characteristics. The dissolution and infiltration of mirabilite seriously deteriorates the physical structure of mirabilite, resulting in a decrease in elastic modulus and an increase in axial deformation, and a decrease in mechanical properties. There are a dissolution layer, dissolution front and undissolved area in the karst infiltration of calcium and mirabilite in the hydrostatic solution, so the mechanism of the calcium and mirabilite karst dissolution process is determined. Because of the dissolution characteristics of mirabilite, underground space development should prevent the uneven settlement of mirabilite, ground collapse, pit and chamber water gushing, corrosive groundwater and other geological problems.

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“…Since the world's first salt cavern gas storage was built in 1959, many research have been done on the mechanical behavior, creep characteristics and underground storage technology of rock salt, and many useful results have been obtained [10][11][12][13][14]. Rock salt is a kind of soft rock with large deformation and low strength [15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…It exhibits the property of strain softening under low confining pressure and exhibits the property of strain hardening under high confining pressure. The creep properties of rock salt are strongly related to temperature [21,22], stress levels [23][24][25][26], loading method [10,11,27,28] and loading paths [23,29,30]. When the temperature and stress levels are constant, the creep rate of the stable creep phase remains almost constant, but during the accelerated creep phase, the creep rate continues to increase, causing the failure of the rock salt.…”

Section: Introductionmentioning

confidence: 99%

Discussion on Determination Method of Long-Term Strength of Rock Salt

et al. 2020

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Due to the extremely low permeability and the excellent creep behavior, rock salt is the optimal surrounding rock of underground energy storage. The long-term safe operation of the rock salt energy storage is closely related to the creep behavior and long-term strength of rock salt, but few researches focus on the long-term strength of rock salt. In order to more accurately predict the long-term strength of rock salt, the isochronous stress–strain curve method and the volume expansion method for determining the long-term strength were analyzed and discussed based on axial compression tests and axial creep tests. The results show that the isochronous stress–strain curve method is intuitive but will greatly increase the test cost and test time to obtain a satisfactory result. The volume expansion method is simple, but the long-term strength obtained according to the inflection point of volumetric strain is much greater than the actual long-term strength of rock salt. Therefore, a new method applicable to rock salt was proposed based on the evolution of damage in rock salt in this paper, which takes the corresponding stress value at the damage initiation point as the long-term strength. The long-term strength determined by this method is consistent with that by the isochronous stress–strain curve method. The method is more economical and convenient and aims to provide a reference for the long-term stability study of underground salt caverns.

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Creep, damage and failure around large rectangular-like caverns and galleries

Cited by 8 publications

References 24 publications

A Nonlinear Creep Model of Rock Salt and Its Numerical Implement in FLAC^3D

A Nonlinear Creep Model of Rock Salt and Its Numerical Implement in FLAC^3D

Effects of Hydrostatic Dissolution and Seepage on the Transport and Mechanical Properties of Glauberite

Discussion on Determination Method of Long-Term Strength of Rock Salt

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Creep, damage and failure around large rectangular-like caverns and galleries

Cited by 8 publications

References 24 publications

A Nonlinear Creep Model of Rock Salt and Its Numerical Implement in FLAC3D

A Nonlinear Creep Model of Rock Salt and Its Numerical Implement in FLAC3D

Effects of Hydrostatic Dissolution and Seepage on the Transport and Mechanical Properties of Glauberite

Discussion on Determination Method of Long-Term Strength of Rock Salt

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A Nonlinear Creep Model of Rock Salt and Its Numerical Implement in FLAC^3D

A Nonlinear Creep Model of Rock Salt and Its Numerical Implement in FLAC^3D