Experimental Study of Rock Creep under True Triaxial Loading

Karev, V. I.; Kilmov, D. M.; Kovalenko, Yu. F.; Устинов, К. Б.

doi:10.3103/s0025654419080041

Cited by 10 publications

(3 citation statements)

References 10 publications

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“…The failure modes of the USO samples mainly behave as slip failure along the structural plane and shear failure through the structural plane. The failure modes of the USV samples mainly behave as bedding shear failure along a structural plane and transverse bulging shear failure along the normal direction of a structural plane (2) The creep curves of these three types of stratified structural samples are nonlinear. The evolutionary relationship between instantaneous strain generated in the stress increasing stage and the load can be expressed as an exponential function base e, ε in = ae bσ .…”

Section: Discussionmentioning

confidence: 99%

“…Creep of rock is common in the underground engineering, which leads to time-sensitive characteristics of crack evolution in rock deformation [1][2][3]. In terms of deep rock engineering construction, the service time of large underground tunnel increases obviously, and the general expected life is from several decades to more than a hundred years.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study on Creep Behavior and Crack Evolution of Stratified Structural Sandstone under Segmental Constant Load

Yang

Pan

et al. 2021

Geofluids

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The hazards induced by stratified rock mass creep are still one of the major problems that threaten the safety of underground engineering. This paper takes safe construction of underground roadway in Urumqi mining area as the research background. In this study, we mainly adopted rock mechanics experiments to accomplish the research on creep behavior and crack evolution of stratified structural sandstone. Creep deformation characteristics of stratified structural sandstone under different load were revealed; also, we analyzed the reason why a part of rock samples failed but others were not under the same load. Creep behavior and crack evolution of rock samples without stratified structure have significant randomness. The crack evolution and failure characteristics of stratified structural rock samples were mainly manifested as failure along and cutting through structural plane and their combined forms. Creep strain, creep duration, and creep rate of rock samples with stratified structure had a nonlinear relationship with applied load, such as exponential function or logarithmic function. Understanding the evolutionary relationship between the above parameters and load provides a basis for obtaining the creep behavior of stratified rock mass under different load conditions.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Study on Creep Behavior and Crack Evolution of Stratified Structural Sandstone under Segmental Constant Load

Yang

Pan

et al. 2021

Geofluids

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“…With the development of engineering construction, projects such as traffic slopes, hydropower reservoir bank slopes, and mine open-pit slopes are inevitably in a certain rainfall and groundwater environment [27][28][29][30][31][32][33][34]. The engineering rock mass is subjected to repeated dry and wet cycles, resulting in repeated damage and deterioration of the mechanical properties of the rock mass [35][36][37][38][39], exacerbating the creep effect of the engineering rock mass, which in turn affects the long-term aging stability of the engineering rock mass [40][41][42][43][44][45][46][47][48]. Therefore, it is of great significance to explore the creep mechanical properties of rock under dry-wet cycle for studying the long-term aging stability of engineering rock and soil.…”

Section: Introductionmentioning

confidence: 99%

Study on creep mechanical properties of carbonaceous shale under dry-wet cycle

Wei¹,

et al. 2023

Phys. Scr.

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The creep mechanical properties of rock under dry-wet cycles are of great significance for studying the long-term aging stability of engineering rock and soil. In the past, there were few studies in this area, and most of the dry-wet cycle tests on rock samples did not conform to the actual stress state of the rock. In view of the shortcomings of these studies, this paper innovatively carried out the dry-wet cycle test of the rock under the continuous state of the stress field, and studied its mechanical properties. The specific method is to take carbonaceous shale as the research object, and use the soft rock shear rheological test system independently developed by our research group to carry out the shear creep test of carbonaceous shale under the action of dry-wet cycle. The test results show that the creep full-time curves of carbonaceous shale under different dry-wet cycles show a step-shaped curve shape. The dry-wet cycle has a significant effect on the deformation characteristics of carbonaceous shale. With the increase of the number of dry-wet cycles, the instantaneous strain of the rock gradually increases, the instantaneous shear modulus decreases from 596.650 MPa at 0 times to 365.199 MPa at 12 times, and the attenuation rate reaches 38.79 %. The creep strain and cumulative creep strain become larger, the stress required for accelerated creep decreases from 3.29 MPa to 2.75 MPa, and the accelerated creep time in the third stage increases from 11.892 h to 5.316 h, and the creep effect is more significant. The long-term strength of carbonaceous shale decreases from 3.05 MPa to 2.49 MPa, and the decrease increases with the increase of dry-wet cycles. The more the number of dry-wet cycles, the smaller the undulation of the shear failure section of the carbonaceous shale, and the smoother the surface. The research results have important guiding significance for the long-term aging stability analysis of engineering rock and soil mass subjected to repeated dry-wet cycles.

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Experimental Methods for Studying the Mechanical Properties of Rocks

Khimulia

2023

Springer Geology

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Experimental Study of Rock Creep under True Triaxial Loading

Cited by 10 publications

References 10 publications

Experimental Study on Creep Behavior and Crack Evolution of Stratified Structural Sandstone under Segmental Constant Load

Experimental Study on Creep Behavior and Crack Evolution of Stratified Structural Sandstone under Segmental Constant Load

Study on creep mechanical properties of carbonaceous shale under dry-wet cycle

Experimental Methods for Studying the Mechanical Properties of Rocks

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