Spherical cavity expansion in porous rock considering plasticity and damage

Huang, Linchong; Liang, Jiguan; Ma, Jianjun; Yang, Hongwei; Gui, Yilin

doi:10.1002/nag.3264

Cited by 13 publications

(6 citation statements)

References 70 publications

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“…To investigate the influence of both damage and plasticity on cavity expansion in rock medium, a plastic damage solution is derived for undrained spherical cavity expansion using a modified Cam-Clay (MCC) model as the plasticity driver and a damage evolution criterion. The proposed solution is verified through a classic solution in literature, and the role of damage in undrained spherical cavity expansion is investigated [47].…”

Section: Introductionmentioning

confidence: 90%

Effect of Loading and Unloading Rates on Sandstone Deformation and Dilatancy under True Triaxial Condition

Wang

Zhang

et al. 2023

Sustainability

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After conducting true triaxial tests on sandstone in a laboratory setting, this study aims to determine the safe tunnelling rate of the roadway by examining the instability and failure characteristics of surrounding rock under different disturbance stresses in deep underground roadway excavation. Results showed that the mechanical properties, deformation, and failure characteristics of sandstone differed under different loading and unloading rates. Specifically, as the loading rate increased, the crack initiation stress increased while the damage stress remained unchanged, and the deformation anisotropy of the rock decreased. In contrast, as the unloading rate increased, the residual stress of the rock decreased, the brittleness increased, and the deformation anisotropy of the rock increased. Additionally, the expansion of the rock went through three critical stages: (1) A–B: a sharp increase in the dilatancy of sandstone (M) in a short period, accompanied by a large number of cracks, (2) B–C: a weakened stage of expansion ability, in which M continued to decrease over time, albeit at a slower rate, and (3) C–D: a stage of enhanced expansion ability, during which M began to increase again, albeit at a slower rate than its rate of decrease. This final stage was the longest.

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Section: Introductionmentioning

confidence: 90%

Effect of Loading and Unloading Rates on Sandstone Deformation and Dilatancy under True Triaxial Condition

Wang

Zhang

et al. 2023

Sustainability

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“…Jiao et al analyzed the failure mechanism and stability efect of segment lining through feld monitoring, numerical simulation, and the numerical analysis method of rock and soil mechanics. In rock engineering, the damage evolution under load has an important infuence on the stifness and deformation characteristics of rock mass [22,23]. Jiao et alimproved the traditional U-shaped steel structures and improved the supporting efect of U-shaped steel supports in loose thick coal seams [21].…”

Section: Introductionmentioning

confidence: 99%

Analysis of U-Shaped Steel Failure Characteristics in Rock Burst Roadway and Design of Stable Structure and Constant Resistance O-Shed

Zhang

Guo

et al. 2023

Advances in Civil Engineering

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The U-shaped steel support has good surface protection and is one of the main supporting forms of the roadway under rock bursts. However, in the supporting process of roadways under rock burst, there are poor mechanical properties of lap joints, resulting in a serious decline in the anti-impact performance of U-shaped steel supports. Using a combination of laboratory experiments and theoretical analysis, we study the sliding mechanism of the U-shaped steel bracket’s overlap section bearing and find the key factors affecting the sliding performance of the overlap section. The characteristics of deformation and failure of U-shaped steel supports under impact loads are analyzed by numerical calculations. An improved method for optimizing the sliding performance of the lap section is proposed to provide theoretical support for the design of stable and constant-resistance energy-absorbing O-shed supports. The research results show that the frictional properties between the contact surfaces of the overlapped sections, especially the frictional properties between the contact surfaces of the clamp and the U-shaped steel, determine the sliding characteristics of the U-shaped steel overlapped sections, which are the key factors affecting the bearing capacity of the support. The single-point maximum bearing capacity of the U-shaped steel bracket under the uniformly distributed impact load is basically close to the maximum bearing capacity of the U-shaped steel bracket under the concentrated impact load. When the U-shaped steel bracket is uniformly loaded, its bearing capacity can be increased several times. When a gasket is added between the U-section steel and the clamping bolt in the lap section, the bearing capacity changes smoothly during the sliding process, which greatly improves the friction performance between the contact surfaces, and can greatly improve the overall bearing capacity, energy absorption, and anti-impact performance of the support structure. Based on this, a stable and constant energy-absorption O-type shed structure for the impacted underground roadway in Laohutai Mine was proposed. The field application proved that improving the sliding performance at the joint of the U-shaped steel support can effectively control the deformation of the roadway under the impact load.

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“…A large number of scholars have carried out research work on theoretical aspects of rock masses and numerical simulations [2][3][4][5][6][7]. Te inversion method using a combination of actual measurements and numerical calculations is one of the efective methods to obtain the mechanical parameters of the surrounding rocks.…”

Section: Introductionmentioning

confidence: 99%

Inversion Study of Mechanical Parameters of Tunnel Surrounding Rock Based on Similar Test

Wang

Cui

et al. 2023

Advances in Civil Engineering

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Based on similar model tests and finite element simulations, inversion study of the mechanical parameters of the tunnel surrounding rock by combining artificial fish swarm algorithm (AFSA) and digital scattering correlation method is carried out. The inversion of the mechanical parameters of the tunnel surrounding rock is carried out by iterating the optimization algorithm to minimize the objective function value through similar model test with the displacement measurements obtained by the digital scattering correlation method as the known quantity and the nodal displacement simulation values obtained by numerical simulation as the unknown quantity. The results show the following: (1) The new research idea proposed in this paper is effective and feasible and can perform the inversion calculation of the parameters of the soft and weak tunnel surrounding rock. (2) Through the inversion calculation, the parameters related to the surrounding rock show a wave-like change: the parameters increase in the initial and final compaction stages due to the small deformation rate of the tunnel and decrease in the continuous loading stage due to the increasing deformation rate of the tunnel. (3) The displacement field calculated by DSCM in the test is basically the same as the displacement distribution characteristics of the numerical simulation displacement cloud map, and the error of nodal displacement value is within 3%.

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Spherical cavity expansion in porous rock considering plasticity and damage

Cited by 13 publications

References 70 publications

Effect of Loading and Unloading Rates on Sandstone Deformation and Dilatancy under True Triaxial Condition

Effect of Loading and Unloading Rates on Sandstone Deformation and Dilatancy under True Triaxial Condition

Analysis of U-Shaped Steel Failure Characteristics in Rock Burst Roadway and Design of Stable Structure and Constant Resistance O-Shed

Inversion Study of Mechanical Parameters of Tunnel Surrounding Rock Based on Similar Test

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