Cyclic Loading Effects on the Creep and Dilation of Salt Rock

Roberts, Lance A.; Buchholz, Stuart; Mellegard, K.D.; Düsterloh, Uwe

doi:10.1007/s00603-015-0845-4

Cited by 95 publications

(29 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As some scholars assumed [25,26], critical deviatoric stress has a close relationship with axial stress. The inset of Fig.…”

Section: Critical Stress Of Salt In Unloading Pathmentioning

confidence: 98%

See 1 more Smart Citation

Experimental Study on the Dilatancy of Rock Salt From an Unloading Path

Zhao¹

2019

GEOMATE

View full text Add to dashboard Cite

As underground storages produce gas, rock salt would always be in unloading paths. The dilatancy behavior of the surrounding rock salt has a great significance for the stability and tightness of the storages. This study investigated dilatancy properties of the rock salt from unloading paths where the confining pressure decreased progressively while the axial pressure was kept fixed. The results showed that: the initial confining pressure value has a rare influence on the dilatancy of the rock salt; an increasing axial pressure can promote the dilatancy of the rock salt; a slower unloading rate and higher temperature would accelerate the dilatancy rate and augment the total volumetric expansion. Compared with the results from conventional loading paths, the compression-dilatancy point is independent of the loading types and remain unchanged in cyclic loading tests. An empirical model to predict compression-dilatancy point was proposed. This model has a certain degree of the engineering significance for designing the operating gas pressure and predicting the dilatancy deformation of the surrounding rock, including porosity variation and permeability.

show abstract

“…As some scholars assumed [25,26], critical deviatoric stress has a close relationship with axial stress. The inset of Fig.…”

Section: Critical Stress Of Salt In Unloading Pathmentioning

confidence: 98%

“…When the plasticity of the rock salt initiates, dilatancy occurs and the swell of the sample accelerates around one point. CDP is important to estimate the safety risk for UGS [25,26]. To discern where the dilatancy point lays, the curve eliminates the elastic deformation.…”

Section: Cdp In Unloading Testsmentioning

confidence: 99%

Experimental Study on the Dilatancy of Rock Salt From an Unloading Path

Zhao¹

2019

GEOMATE

View full text Add to dashboard Cite

show abstract

“…Further studies, applying triaxial stress conditions and various complex stress paths on rock salt, were executed among others by Bauer et al (2011), Düsterloh et al (2013, Ma et al (2013) and Roberts, Buchholz, Mellegard & Düsterloh (2015). Although no cyclic thermal loads were applied, the temperature was considered by means of isothermal conditions at different temperatures in some of these studies.…”

Section: Motivation and Backgroundmentioning

confidence: 99%

Probabilistic Analysis of a Rock Salt Cavern with Application to Energy Storage Systems

et al. 2016

View full text Add to dashboard Cite

“…At the same time, some scholars [16,17] have carried out cyclic creep loading tests of rock salt. Roberts et al [18] carried out a triaxial cyclic loading creep test and a static creep test on rock salt to evaluate the cyclic effect of applied stress. Fan et al [19] have shown that the cyclic life of rock salt in the cyclic creep test is significantly reduced within a certain range, and an empirical model of cycle life and interval time is established.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study and Damage Model Study of Rock Salt Subjected to Cyclic Loading and Cyclic Creep

Zhao

Huang

Liu

et al. 2020

Advances in Civil Engineering

View full text Add to dashboard Cite

Due to the gas injection and production of underground salt caves during the operational phase, rock salt is often subjected to a combined stress of cyclic pressure and constant pressure. In order to investigate the damage evolution of rock salt under different combined stresses, the uniaxial cyclic loading test and cyclic creep test were carried out. The stress-strain curves, energy characteristics, energy dissipation, and damage of rock salt in the two experiments were analyzed and compared. The test results show that the stress-strain curves of the two tests presented three stages of “sparse”-“dense”-“sparse.” As the maximum stress increases, the stage of “dense” will decrease and the rock salt cycle life will decrease. The relationship between cycle life and Δσ (difference between maximum and minimum stress in the tests) is an exponential function under cyclic loading and a linear relationship under cyclic creep. Based on the experimental data, the energy dissipation of rock salt is analyzed. The damage variables were defined from the perspective of energy dissipation, and the damage evolution of rock salt under two tests was obtained. There are three corresponding stages of energy dissipation and damage: initial, constant speed, and acceleration. The damage model is obtained by inverse functioning the s function, and then the correction coefficient is added to the model to obtain the modified damage model. The modified damage model is compared with the experimental data. The results show that the model can accurately describe the three stages of rock salt damage. The significance of parameters in the modifying damage model is also discussed.

show abstract

Cyclic Loading Effects on the Creep and Dilation of Salt Rock

Cited by 95 publications

References 4 publications

Experimental Study on the Dilatancy of Rock Salt From an Unloading Path

Experimental Study on the Dilatancy of Rock Salt From an Unloading Path

Probabilistic Analysis of a Rock Salt Cavern with Application to Energy Storage Systems

Experimental Study and Damage Model Study of Rock Salt Subjected to Cyclic Loading and Cyclic Creep

Contact Info

Product

Resources

About