Experimental study on the strain rockburst of calcareous sandstone containing joint surface

Miao, Chengyu; Sun, Xiaoming; Zhang, Yong; Wang, Junwei; Zhang, Jiaxuan; Song, Peng; Gan, Li

doi:10.1007/s12517-020-06035-w

Cited by 7 publications

(3 citation statements)

References 23 publications

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“…e joints included in the samples are transfixion joints, which are divided into parallel joints and cross joints for analysis. e number of joints in each group is 10,20,30,40,50,60,70,80,90,100,120,140,160,180,200, 300, and 400, respectively.…”

Section: Numerical Calculation Modelmentioning

confidence: 99%

“…In practice, most underground projects are built in a rock mass with structural planes. Numerous studies and production practices have shown that joints, faults, folds, and other geological structures are some of the important factors causing rockburst [18][19][20]. At the same time, rockburst prediction has been one of the biggest challenges in the field of rock mechanics for its nature of unpredictability [21,22].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Joint Density on Rockburst Proneness of the Elastic‐Brittle‐Plastic Rock Mass

Pan

Ren

Cai

2021

Shock and Vibration

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The prediction of rockburst proneness is the basis of preventing and controlling rockburst disasters in rock engineering. Based on energy theory and damage mechanics, the quantitative functional relationship between joint density and energy density was derived. Then, the theoretical results were verified by numerical simulation and uniaxial compression test, and the effect of joint density on rockburst proneness of the elastic-brittle-plastic rock mass was discussed. The results show that the relationship between the joint density and the dissipated energy index of the jointed rock mass is a logarithmic function. With the same total input energy, the higher the joint density, the more the damage dissipation energy. Even in the case of high joint density, the rock mass still has limited resistance to external failure. Under the same joint density, the strength of parallel jointed rock mass is better than that of the cross-jointed rock mass, and the parallel jointed rock mass can accumulate more elastic strain energy and has higher rockburst proneness. The joint density is closely related to the ability of the rock mass to store high strain energy. The higher the joint density is, the weaker the ability to accumulate the elastic strain energy of rock mass is and the lower the rockburst proneness is. It is helpful to predict rockburst proneness by investigating and studying the properties of geological discontinuities. The research results have some theoretical and engineering guiding significance for the prediction of rockburst proneness of the jointed rock mass.

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Section: Numerical Calculation Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Joint Density on Rockburst Proneness of the Elastic‐Brittle‐Plastic Rock Mass

Pan

Ren

Cai

2021

Shock and Vibration

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“…However, mesh refinements are still needed. The discrete element method (DEM) gets free from the grids existing in tradi-tional FEM, which can be well applied to the simulations of discontinuous problems [20,21]. However, DEM has numerous microscopic parameters with no physical meanings, and complex parameter calibrations are needed before numerical simulation, which is inconvenient to apply.…”

Section: Introductionmentioning

confidence: 99%

An Improved Form of 2D SPH Method for Modeling the Excavation Damage of Tunnels Containing Random Fissures

Ren

Zhang

et al. 2021

Geofluids

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The excavation damage of deep tunnels is one of the most important factors contributing to the failure of tunnel structures. In order to investigate the influence of tunnel shapes and fissure geometries, the kernel function in the traditional SPH method has been improved, which can realize the brittle fracture characteristics of particles and can be called the Improved Kernel of Smoothed Particle Hydrodynamics (IKSPH-2D). Meanwhile, the random fissure generation method in IKSPH has been put forward. Different tunnel shapes, fissure geometries, and locations are considered during the simulation of tunnel excavation, and results show that (1) the typical “V”-shaped shear damage zones appear after the tunnel excavation, which is consistent with engineering practice. Meanwhile, tunnel excavation also has an “activating” effect on the preexisting fissures. (2) The stability of circular-shaped tunnel is the best, while horseshoe shaped tunnel is worse, and the “U”-shaped tunnel is the worst. (3) Fissures with small and large dip angles have the greatest influence on the stability of tunnel excavation. With the increase of fissure numbers and lengths, the tunnel tends to be instable. (4) The IKSPH method gets free from traditional grids in FEM, which can dynamically reflect the fracture processes of tunnel excavation. Meanwhile, developing 3D IKSPH parallel program will be the future directions.

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Experimental Study on the Free-Face True-Triaxial Rockburst Test Considering the Influence of Joints

Li,

et al. 2024

Rock Mech Rock Eng

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Experimental study on the strain rockburst of calcareous sandstone containing joint surface

Cited by 7 publications

References 23 publications

Effect of Joint Density on Rockburst Proneness of the Elastic‐Brittle‐Plastic Rock Mass

Effect of Joint Density on Rockburst Proneness of the Elastic‐Brittle‐Plastic Rock Mass

An Improved Form of 2D SPH Method for Modeling the Excavation Damage of Tunnels Containing Random Fissures

Experimental Study on the Free-Face True-Triaxial Rockburst Test Considering the Influence of Joints

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