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The first lined rock cavern (LRC) for storage of gas under high-pressure, constructed at Skallen, in southwest Sweden is now complete. The project is a joint venture between Sydkraft of Sweden and
The energy stored in deep rock masses will be affected by excavation, and its distribu- tion characteristics will change, resulting in energy accumulation and
The high bench formed by layered excavation exposes the sidewall rock mass, leading to the loss of original stress balance and deterioration of rock mass quality (Zhou et al., 2019). In addition, local blasting disturbance, support parameters, and timing selection also affect the stability of caverns.
A series of physical and numerical model tests were performed to investigate the failure behavior of a continuous rock mass surrounding a silo-shaped cavern under high internal pressure. This research aims to provide information on fracture initiation and propagation in the rock mass around an underground gas storage cavern
The surrounding rock accumulates a certain amount of energy under static stress. 55 However, the presence of dynamic impact load can lead to an increase in the stored energy and a decrease in the energy storage capacity of the surrounding rock, potentially causing a sudden release of stored energy. 55, 56 Therefore, static stress
The progressive brittle failure of high-stress hard surrounding rock masses caused by layered excavation severely threatens the stability of large underground caverns. We summarize the stress path in the potential failure zone of the Shuangjiangkou underground powerhouse during layered excavation, and then design the multistep
Since the stratum is assumed to have the same geological properties, the shallow rectangular chamber model can be simplified as a rectangular chamber problem in a semi-infinite plane, as shown in Fig. 1.Assuming that the unit weight of the rock mass is γ and the lateral pressure coefficient is λ, without considering the effect of the ground load,
For example, Wang et al. [26] studied the mechanism of rockburst in horizontal section mining of a steeply inclined extra-thick coal seam by combining theoretical analysis with numerical simulation.
Introduction The concept of thermodynamic potentials balance has become instrumental in complex resource engineering modelling. 1 In particular, the transfer of energy due to rock materials weakening has attracted a considerable research interest.2, 3 The energy redistribution due to mass alteration through anthropogenic activities has
In this study, Shandong Linyi fine-red sandstone was used in the test. To determine the mineral composition of sandstone, rock thin sections were analyzed by X-ray diffraction instrument (Rigaku, Smart-lab SE). Fig. 2 a presents that the sandstone is mainly composed of SiO 2, Ca, and Na elements, and is composed of quartz (42%), plagioclase
X. Que et al. Keywords Irregular columnar jointed rock mass · Energy evolution · Characteristic strength · Anisotropic property · Excavation unloading List of Symbols σ 1, σ2, σ3 Maximum, intermediate, and minimum principal stresses β Inclination angle ρ i, Ei, vi, σ
In this paper, we investigate the influence of the excavation damaged zone (EDZ) on the geomechanical performance of compressed air energy storage (CAES) in lined rock caverns. We conducted a detailed characterization of the EDZ in rock caverns that have been excavated for a Korean pilot test program on CAES in (concrete) lined
The first lined rock cavern (LRC) for storage of gas under high-pressure, constructed at Skallen, in southwest Sweden is now complete. The project is a joint venture between Sydkraft of Sweden and Gaz de France for the development and demonstration of the LRC-Technology. The excavation work was completed at the end of 2000 and the
To investigate the stability of rock mass in high geostress underground powerhouse caverns subjected to excavation, a microseismic (MS) monitoring system was established and the discrete element method (DEM)-based numerical simulation was carried out. The tempo-spatial damage characteristics of rock mass were analyzed.
Energy evolution is a key factor to catastrophe during an excavation of deep rock mass. Existing energy analysis methods are only limited to changes in elastic strain energies before and after the
The index considers both the energy released by the rock mass per unit volume and the energy released speed when the strain energy accumulated in the surrounding rock exceeds the energy storage limit of the rock mass. It is a quantitative index that can reflect the rockburst location and strength.
DOI: 10.1016/J.TUST.2005.12.151 Corpus ID: 109956609 Microseismic event monitoring of highly stressed rock mass around underground oil storage caverns @article{Hong2006MicroseismicEM, title={Microseismic event monitoring of highly stressed rock mass around underground oil storage caverns}, author={J. S. Hong
During the use of compressed air energy storage devices, the chamber continuously inflates and deflates and operates continuously for 365 days a year, with a lifespan of about 40 years and a total
The high bench formed by layered excavation exposes the sidewall rock mass, leading to the loss of original stress balance and deterioration of rock mass
The squeezing deformation of deep soft rock tunnels is driven by energy. Few scholars have carried out theoretical research on energy evolution for deep soft
That is, during the excavation of underground cavities in rock masses, when the density of strain energy partially accumulated in the surrounding rock exceeds the energy storage limit of the rock mass
Large buried depth and high in situ stress endow the rock mass with high strain energy. During the blasting excavation of high energy-storage rock masses, with detonation of explosives in the blasting hole, the rock mass is broken and the fragment is thrown.
Deep Rock Mass Engineering: Excavation, Monitoring, and Control November 2022 Applied Sciences 12(22):11721 DOI:10.3390 For a railway or highway tunnel under high water pressure during
Excavation, Monitoring, and Control", was launched by a group of scholars from all over. the world to resolve the challenges of deep rock mass engineering. Thirty-nine manuscripts. were
The energy stored in deep rock masses will be affected by excavation, and its distribution characteristics will change, resulting in energy accumulation and
The excavation method of rock mass in deep underground engineering mainly adopts blasting excavation, which is a transient unloading process (Lu et al. 2012). Rapid unloading of rock mass under high pressure is bound to cause rapid unloading damage to the rock mass (Xie and He 2004; Qiu et al. 2014). The current rockburst
The water-sealing effect and rock mass stability are two key scientific problems for the construction of underground water-sealed oil storage caverns (Shi et al., 2018; Zhuang et al., 2017
Rockburst is a kind of dynamic rock failure process that is easily induced by the excavation of a high-stress rock mass. However, from an energy perspective, the existing indexes for rockburst tendency have a limitation in that they do not consider the energy release speed. In this study, energy release effectiveness was proposed based
When the energy accumulated by the surrounding rock exceeds the energy storage limit, it will be released by rock mass failure, which will result in
1. Introduction. Globally, the depletion of fossil energy as well as climate and environmental issues have become increasingly prominent [1].As part of China''s "14th Five-Year" energy development plan, the government aims to reach a 20 % share of non-fossil energy in the overall energy mix by 2025 [2].This plan involves the construction
storage, shelter, dwelling, and so on. However, deep rock mass excavation and construction present a great number of challenges, which urgently need to be addressed, such as rock bursts and squeezing.
The progressive brittle failure of high-stress hard surrounding rock masses caused by layered excavation severely threatens the stability of large underground caverns. We summarize the stress path in the potential failure zone of the Shuangjiangkou underground powerhouse during layered excavation, and then design the multistep
Rockburst seriously threaten the economic benefits and construction safety of deep tunnel. Rockburst prediction is one of the key scientific issues in rockburst research. In this paper, the elastic strain energy is regarded as the inherent power of rockburst. A multi-factor rockburst criterion is established which consider the properties of rock, the
The rock masses with high in situ stress and relatively low strength played a significant role in the strong unloading deformation and failure of surrounding rock mass during the excavation of underground caverns.
Rockburst is a kind of dynamic rock failure process that is easily induced by the excavation of a high-stress rock mass. However, from an energy perspective, the existing indexes for rockburst tendency have a limitation in that they do not consider the energy release speed. In this study, energy release effectiveness was proposed based
An analytical solution for elastoplastic responses of an underground lined rock cavern for compressed air energy storage considering the effect of excavation and high internal pressure is proposed. To verify the proposed analytical solution, Abaqus simulations are performed with the same conditions used in the analytical solution.
Rock masses with various levels of dip angles exhibit similar elastic strain energy and dissipation energy at the peak point, demonstrating that energy evolution is dominated by energy storage and
The role of the energy in a rock mass was considered in the excavation of a deep-buried tunnel via production blasting. According to the type of rock damage,
The energy of the surrounding rock in the chamber is stable away from the centre, which is the initial energy of the in situ stress, and reaches a peak at the corner. Due to the energy release after the excavation of the surrounding rock of the roof, the energy value here is low. Download : Download high-res image (114KB)
The first lined rock cavern (LRC) for storage of gas under high-pressure, constructed at Skallen, in southwest Sweden is now complete. The project is a joint venture between Sydkraft of Sweden and
There is a long sequence of periodic characteristics of reservoir water storage and discharge in large hydropower stations. The unloaded rock mass formed by blasting and excavation in the reservoir slope of the reservoir fluctuation zone is not only subjected to the penetration erosion caused by the change of the water level of the
The main damage areas of rock mass were located at the Stake K0 + 110m–K0 + 170m. Weak structures and multi-cavern effect aggravated rock mass damage subjected to excavation-unloading.
The elastic strain energy of a rock sample can be divided into an energy storage phase and an energy release phase during the whole process of uniaxial
rock mass, and the excavation disturbance makes the internal energy of the high energy storage rock mass easy to release, resulting in serious engineering disasters and economic losses [7, 8]. High pore water pressure also affects the deep rock mass, which is conducive to the development and connection of the original defects in the rock mass
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