Stability and serviceability of underground energy storage caverns in rock salt subjected to mechanical cyclic loading

Khaledi, Kavan; Mahmoudi, Elham; Datcheva, Maria; Schanz, Tom

doi:10.1016/j.ijrmms.2016.04.010

Cited by 146 publications

(39 citation statements)

References 40 publications

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“…Yang et al [13] constructed a viscoelastoplastic creep model of rock material, which can better describe the triaxial compressive loading and unloading creep behavior of marble. Khaledi et al [14] employed an elastoviscoplastic creep model to predict the stress-strain relation around the cavern during the construction and cyclic operation phases.…”

Section: Investigatedmentioning

confidence: 99%

Mechanical Behavior of Red Sandstone under Incremental Uniaxial Cyclical Compressive and Tensile Loading

Zhao

Liu

Huang

et al. 2017

Shock and Vibration

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Uniaxial experiments were carried out on red sandstone specimens to investigate their short-term and creep mechanical behavior under incremental cyclic compressive and tensile loading. First, based on the results of short-term uniaxial incremental cyclic compressive and tensile loading experiments, deformation characteristics and energy dissipation were analyzed. The results show that the stress-strain curve of red sandstone has an obvious memory effect in the compressive and tensile loading stages. The strains at peak stresses and residual strains increase with the cycle number. Energy dissipation, defined as the area of the hysteresis loop in the stress-strain curves, increases nearly in a power function with the cycle number. Creep test of the red sandstone was also conducted. Results show that the creep curve under each compressive or tensile stress level can be divided into decay and steady stages, which cannot be described by the conventional Burgers model. Therefore, an improved Burgers creep model of rock material is constructed through viscoplastic mechanics, which agrees very well with the experimental results and can describe the creep behavior of red sandstone better than the Burgers creep model.

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Section: Investigatedmentioning

confidence: 99%

Mechanical Behavior of Red Sandstone under Incremental Uniaxial Cyclical Compressive and Tensile Loading

Zhao

Liu

Huang

et al. 2017

Shock and Vibration

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“…The tested rock salt specimen in this experiment was collected from the Salado rock salt formation in New Mexico, USA. Khaledi, Mahmoudi, Datcheva & Schanz (2016b). It should be stated that the value of η * M is adopted from Hou (2003).…”

Section: Compression/dilation Boundary 25mentioning

confidence: 99%

“…Based on the conducted analyses by Khaledi, Mahmoudi, Datcheva & Schanz (2016b), when cavern is operated under very low pressure loading scenarios, LF R raises by increasing the number of load cycles. In this thesis, the damage is not surveyed.…”

Section: No-damage Criterionmentioning

confidence: 99%

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

et al. 2016

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“…Many research investigations focus on the compressive strength, elasticity, and time dependency under the effects of cyclic loadings [10,[21][22][23], the influence of the strain rate, confining pressure, temperature, and dynamic loading on the mechanical properties of rock [24][25][26], and also the stability and serviceability of storage caverns under cyclic loadings [27]. However, few studies explore the response of rock under different cyclic loadings and the corresponding development of damage.…”

Section: Introductionmentioning

confidence: 99%

Damage Evolution Characteristics of Rock Salt under Different Stress Conditions

Wang

Liu

Wang

2019

Advances in Civil Engineering

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Understanding the damage evolution characteristics of rock material is essential to the long-term stability and safety analysis of the underground facility. In this study, a series of cyclic loading tests under tensile or compressive stresses are conducted to investigate the damage evolution, deformation, peak strength, and failure pattern of rock salt. A special attention is paid on the microcracking process by using a 3D acoustic emission (AE) test system. The laboratory tests show that the damage degree of rock salt under compression is the highest, followed by the damage in the direct tensile test. The lowest value of damage is determined by using the Brazilian test. The damage degrees where the damage rate starts to decrease are about 0.83 in the direct tensile test, about 0.75 in the Brazilian test, and about 0.91 in the compression test. The failure mode of rock salt changes from the tensile mode in the uniaxial compression test to the compression-shear mode in the confined compression test at low confinement. But from the confining pressure of 15 MPa, the rock salt displays great plastic dilatant distortion and without appreciable macroscopic fractures. Accordingly, with increasing confining pressure, the positions where the rapid increase in cumulative AE counts occurs and where the AE event with high energy appears are changed, from the beginning of the test at low confinement to the postpeak stage of the test at high confinement.

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Stability and serviceability of underground energy storage caverns in rock salt subjected to mechanical cyclic loading

Cited by 146 publications

References 40 publications

Mechanical Behavior of Red Sandstone under Incremental Uniaxial Cyclical Compressive and Tensile Loading

Mechanical Behavior of Red Sandstone under Incremental Uniaxial Cyclical Compressive and Tensile Loading

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

Damage Evolution Characteristics of Rock Salt under Different Stress Conditions

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