1. IntroductionNatural gas has gained increasingly an importance as an energy source in recent years. Whilst the proportion of natural gas as a primary energy source in Germany in 1970 was only 5.4%, in 1994 …
Nonlinear creep-damage constitutive model of surrounding rock in salt cavern reservoir. Salt cavern energy storage is a key technology to promote the optimization of China''s energy reserve structure, but the surrounding rock of the reservoir cavity is prone to creep and damage during the long-term injection production process, which seriously ...
3.1. Energy Evolution Theory During the loading and unloading process, the energy input from the test apparatus to the rock sample under hydrostatic pressure is expressed as U 0; after increasing the axial stress difference, the energy input is expressed as U 1, and the energy consumed generated by the circumferential deformation of the …
Underground storage is more and more prevalent in energy storage with its many advantages such as large storage capacity, strong mobility, long service life and higher safety than ground ...
Abstract. Since the early 1970s, Korea has constructed many large-scale underground energy storage caverns in response to rapid industrial development. In this period, rock mechanical engineers in Korea gained valuable experience in developing underground space technologies. A brief description of underground projects, including oil …
Nonlinear energy storage and dissipation of rocks are common in earthquake, tunnel, and mining engineering. To investigate the nonlinear energy characteristics of rocks, multi-level cyclic loading–unloading triaxial compression (CLTC) tests were performed on early Cretaceous granite and Permian red sandstone. The …
Energy storage caverns built in rock salt have better safety and stability than those built in other rocks [4]. Even so, there still have been some accidents in salt cavern storages all over the ...
27 Nonlinear energy evolution theory used to analyze rock energy accumulation and dissipation. 28 Energy storage coefficient for creep compression ranges from 0.7-0.75, conventional compression ranges from 29 0.79-0.94. 30 High confining31 1.
Multi-stage cyclic loading–unloading triaxial compression (MCLTC) tests of granite and red sandstone were performed to study the non-linear characteristics of …
The research findings reveal the nonlinear energy evolution mechanism of granitic gneiss under high ground stress, providing a foundation for further investigation …
Semantic Scholar extracted view of "Nonlinear finite-element analysis of solution mined storage caverns in rock salt using the LUBBY2 constitutive model" by S. Heusermann et al. DOI: 10.1016/S0045-7949(02)00415-7 Corpus ID: 110507146 Nonlinear finite-element ...
DOI: 10.3997/2214-4609.202035247 Corpus ID: 235009817 Multi-scale Nonlinear Modeling of Subsurface Energy Storage: Cyclic Loading with Inelastic Creep Deformation @inproceedings{Kumar2020MultiscaleNM, title={Multi-scale Nonlinear Modeling of Subsurface Energy Storage: Cyclic Loading with Inelastic Creep Deformation}, …
1 INTRODUCTION Currently, high-efficiency energy exploitation and safe storage is a critical topic. 1-4 Because salt rock has good mechanical properties, low permeability, and damage recovery capacity, 5 underground salt caves can be widely used in underground energy storage, waste disposal, 6 and construction of compressed gas …
Subsurface geological formations provide giant capacities for large-scale (TWh) storage of renewable energy, once this energy (e.g. from solar and wind power plants) is converted …
Characteristics of energy accumulation, evolution, and dissipation in uniaxial cyclic loading and unloading compression of 30 sandstone rock specimens under six different loading rates were explored. Stress–strain relations and acoustic emission characteristics of the deformation and failure of rock specimens were analyzed. The …
The nonlinear energy self-promotion- inhibition model suggested an energy mechanism that could inhabit energy development, particularly when a critical …
This study aims to investigate the influence of length-to-diameter (L/D) ratio on the strain energy storage and evolution characteristics of rock materials during …
To investigate the energy evolution characteristics of rock materials under uniaxial compression, the single-cyclic loading–unloading uniaxial compression tests of four rock materials (Qingshan granite, Yellow sandstone, Longdong limestone and Black sandstone) were conducted under five unloading stress levels. The stress–strain …
conning pressures, the storage process of elastic energy has regular characteristics 9,10. e rock damage process has been studied from the energy point of view. e ultimate goal is to discover the ...
The complex creep behaviour of rock salt caverns is modelled and simulated through a 2D finite element model using unstructured grids with the aim of aiding assessments of the safety and reliability of the structure in the longer term. Subsurface formations provide giant capacities for renewable energy storage, when this energy is converted to green fuels …
The energy nonlinear evolution model of rock failure is consistent with the experimental data. The energy fitting curve is consistent with the test curve. The correlation coefficient is above 0.95. It shows that the establishment of various nonlinear energy models can better reflect the energy evolution law in the process of rock failure.
The research findings reveal the nonlinear energy evolution mechanism. 15 of granitic gneiss under high ground stress, providing a foundation for further investigation into the …
Salt rock stratum is internationally deemed as a perfect medium for underground energy storage (oil and natural gas) [1], [2], [3]. Creep behavior is one of the foremost mechanical properties of salt rock, and it is strongly linked with the long-term stability of salt cavern storage [4], [5], [6], [7].
For the salt rock layer, the nonlinear creep model is selected as the constitutive model, respectively. ... Dynamic prediction model for surface settlement of horizontal salt rock energy storage Energy, 235 (2021), Article 121421, 10.1016/j.energy.2021.121421 Y. ...
Geological formations are often highly heterogeneous and entail complex nonlinear inelastic rock deformation ... grain structure of the rocks. As the subsurface energy storage technology is ...
Due to high water pressure in the concrete reinforced hydraulic tunnels, surrounding rocks are confronted with nonlinear seepage problem in the pumped storage power station. In this study, to …
Request PDF | Nonlinear creep damage constitutive model of rock salt and its application to engineering | Rock salt is considered as a potential medium for energy storage,nuclear waste deposit ...
Request PDF | On Jan 1, 2020, K. Ramesh Kumar and others published Multi-scale Nonlinear Modeling of Subsurface Energy Storage: Cyclic Loading with Inelastic Creep Deformation | Find, read and ...
A promising option for storing large-scale quantities of hydrogen is in subsurface rock salt caverns. Rock salts, however, are known to exhibit nonlinear time-dependent creep deformation. In this work, the complex creep behaviour of rock salt caverns is modelled and simulated through a 2D finite element model using unstructured …
Long‐term mechanical property is critical for underground energy storage in a salt cavern. Multistage loading has been widely used in creep tests to save test time and cost. If the number of loading stages is too small or the loading time of each stage is short, the long‐term strength of salt rock is difficult to determine. For this reason, this paper …
Nonlinear energy storage and dissipation of rocks are common in earthquake, tunnel, and mining engineering. ... tests of granite and red sandstone were performed to study the nonlinear ...
Wenbo Liu, Hui Zhou, Shuguang Zhang, Shuai Jiang, Liu Yang, A nonlinear creep model for surrounding rocks of tunnels based on kinetic energy theorem, Journal of Rock Mechanics and Geotechnical Engineering, 10.1016/j.jrmge.2022.04.015, 15, 2, …
Energy balance analysis based on stress-strain curve has been proved to be a helpful method to understand the progressive failure behavior of rock. A great deal of researches has been performed to ...
In engineering practice, the fractured rock mass of dam foundation, slope and roadbed is often unstable due to seepage instability 1.After the dam is loaded with water, the upstream fault is ...
In general, the permeability of the salt rock is ignored in the process of considering salt cavern energy storage. However, a study by SMRI (Solution Mining Research Institute) shows that when the brine in the salt cavern penetrates the surrounding salt layer, it will affect the matrix stress, creep, and micro-permeability of the salt, and …
Published in Journal of Energy Storage 1 November 2022; Geology, Engineering, Environmental Science; View via Publisher. Save to Library Save. Create Alert Alert. Cite. ... Nonlinear creep model of salt rock used for displacement prediction of salt cavern gas storage. Junbao Wang Qiang Zhang Z. Song Shijin Feng Yuwei Zhang.
Geological formations are often highly heterogeneous and, when utilized for cyclic energy storage, entail complex nonlinear rock deformation physics. It is known that the cyclic …
where U 0 is the stored energy of a rock unit, in MJ; U e is the released elastic energy, in MJ; and U d is the dissipated energy, in MJ. The relationship between the elastic energy density u e i and the dissipated energy density u d i per unit volume of rock mass under loading and unloading conditions at a stress of σ′ is shown in Fig. 1.The zone …
Salt cavern energy storage is a key technology to promote the optimization of China''s energy reserve structure, but the surrounding rock of the reservoir cavity is prone to creep and damage during ...