Coupled thermal-hydrological-mechanical behavior of rock mass surrounding a high-temperature thermal energy storage cavern at shallow depth

Park, Jung–Wook; Rutqvist, Jonny; Ryu, Dong-Woo; Park, Eui Seob; Synn, Joong-Ho

doi:10.1016/j.ijrmms.2016.01.007

Cited by 27 publications

(7 citation statements)

References 21 publications

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“…Creep behavior has been detected under different conditions, 69 such as variant stresses, 18,70–73 variant water pressure, 4,37,47,74 and variant temperatures 46,75,76 . Among these conditions, the stress produces compression, shearing, and tensile effects on the rock.…”

Section: Study Methods and Results Of Creep Experimentsmentioning

confidence: 99%

A state‐of‐the‐art review on creep damage mechanics of rocks

Zhou

Pan

Berto

2022

Fatigue Fract Eng Mat Struct

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In many major rock projects, services have spanned decades or even hundreds of years. For engineering design, it is necessary not only to ensure the safety of personnel during construction but also to ensure the safety of long‐term use and operation in the future. Therefore, it is indispensable to study the creep damage mechanical properties of rocks before the construction of the project. For a long time, rock creep has been an important reason for large deformation and even instability in building foundations, underground tunnels, and slopes. Moreover, the surrounding rock generally exhibits obvious creep damage characteristics under an environment of high stress, high temperature, and high water‐pressure. Under certain geological conditions, this creep damage behavior is extremely prominent. Therefore, the study of rock creep damage mechanics is very important. This paper reviews the advancement of rock creep damage mechanics from the aspects of mechanisms, research methods, constitutive models, and so forth. Rock creep is a process of interaction between structural damage and the hardening effect. The structural damage and hardening effect are opposite to each other, but they exist in the same physical process. The creep research method introduces mainly the research objects, influencing factors, monitoring methods, and experimental methods. Creep constitutive models introduce mainly empirical models, linear element combination models, nonlinear combination models, and other nonlinear models based on new theory. Finally, based on the current research progress, several important research directions in rock creep damage mechanics are pointed out.

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Section: Study Methods and Results Of Creep Experimentsmentioning

confidence: 99%

A state‐of‐the‐art review on creep damage mechanics of rocks

Zhou

Pan

Berto

2022

Fatigue Fract Eng Mat Struct

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“…Tx H x (26) The specific form of the H reads     (27) It is assumed that the dimension of the square matrix K is u n and its rank   x T x   (28) where j x denote the scalar values, obtained by premultiplying the vector x by the eigenvectors T j η of H as jT j…”

Section: Stability Analysismentioning

confidence: 99%

“…With the emerging computational geoscience [7,18] and some deep underground excavation problems, for some long-term problems, the timescale for multi-field evolution can range from 10 0 to 10 5 years [26][27][28], and in most cases, the load is highly time-dependent and varies cyclically [29,30]. This undoubtedly brings great challenges to the FD-based numerical methods.…”

Section: Introductionmentioning

confidence: 99%

Multi-timescale high-accuracy modeling of hydro-mechanically coupled processes in fluid-saturated poroelastic media

Wang

2017

Computers and Geotechnics

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In order to accurately model the behaviour of geostructures, the interaction between solid-deformation and fluid-flow needs to be considered for porous geomaterials. However, a dilemma in the selection of suitable time-step size and high computational accuracy always exists in temporal finite difference-based numerical methods. Especially, the load is long-term, cyclically varied and highly time-dependent. The goal of the paper is to develop a new computational scheme for high-accuracy modeling of hydro-mechanically coupled processes for fluid-saturated poroelastic media, in which high-accuracy computation is achieved through a multi-timescale approach consisting of the precise integration of an exponential matrix.

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“…As a typical extreme geological environment for deep underground rocks, the influence of high temperature on rock strength, deformation, and stability has become a popular topic in the field of rock mechanics and engineering 1 – 5 . Complex physical and chemical changes occur inside rock under high-temperature action 2 – 4 , 6 – 9 , the strength indexes of different types of rocks show different temperature effects, and even for the same type of rock, in different geological conditions, its temperature effect will vary significantly 10 – 13 . Ground temperature is an important factor affecting the strength properties of rocks that cannot be ignored.…”

Section: Introductionmentioning

confidence: 99%

Analysis of strength property and pore characteristics of Taihang limestone using X-ray computed tomography at high temperatures

Liu

Huang

2021

Sci Rep

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Rising temperature will cause the changes of pore characteristics and strength property in rock. This research takes the limestone produced in Taihang Mountains as the research object, and performs high-temperature treatment within 25–1000 °C. The high-resolution X-ray computed tomography (CT) scanning test method is used to visually reconstruct the three-dimensional image of the sample, and obtain the spatial distribution status of the mesoscopic parameters of the bones, pores/cracks, etc. The results show that when the temperature exceeded 700 °C, the samples appeared milky white in appearance and as the temperature increased, the color gradually turned white, macroscopic cracks began to appear on the surface, while the meso-pores connected rapidly, reflecting a typical progressive destruction process from inside to outside. The change law of volume porosity with temperature has a consistent trend with that of the apparent morphology of the sample. Similarly, the mechanical test results suggest that 700 °C is also the turning temperature for strength deterioration and brittle-plastic transformation of sample. Based on the results of high-temperature test, CT test and mechanical test, there are enough evidences to show that, for the limestone sample, 700 °C is probably to be the mutation temperature of physical–mechanical behavior.

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Coupled thermal-hydrological-mechanical behavior of rock mass surrounding a high-temperature thermal energy storage cavern at shallow depth

Cited by 27 publications

References 21 publications

A state‐of‐the‐art review on creep damage mechanics of rocks

A state‐of‐the‐art review on creep damage mechanics of rocks

Multi-timescale high-accuracy modeling of hydro-mechanically coupled processes in fluid-saturated poroelastic media

Analysis of strength property and pore characteristics of Taihang limestone using X-ray computed tomography at high temperatures

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