Numerical simulation of rock bursts

Müller, W.

doi:10.1016/0167-9031(91)91513-h

Cited by 57 publications

(15 citation statements)

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“…Rockbursts or "bumps" in underground mines are characterized by the spontaneous release of elastic energy, which is largely transformed into kinetic energy, thus leading to abrupt lateral displacements of the surrounding rockmass [1]. As the depths and locations that tunnels are being developed have become increasingly challenging, more and more cases of rockbursts have been reported [2].…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation on rock failure under combined static and dynamic loading during SHPB tests

Zhu

Bai

et al. 2012

International Journal of Impact Engineering

111

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Section: Introductionmentioning

confidence: 99%

Numerical simulation on rock failure under combined static and dynamic loading during SHPB tests

Zhu

Bai

et al. 2012

International Journal of Impact Engineering

111

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“…A finite element model was developed by Zubelewicz and Mróz (1983) to study unstable rock failure in underground openings. Müller (1991) used FEM and finite difference method (FDM) to simulate rockburst and concluded that the FDM was more suitable for modelling rockburst. They used kinetic energy as an indicator of unstable failure and considered that a failure was unstable if the kinetic energy increased drastically.…”

Section: Numerical Studymentioning

confidence: 99%

Simulation of unstable rock failure under unloading conditions

Manouchehrian

Cai

2016

Can. Geotech. J.

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Rockburst is an unstable rock failure and one of the most hazardous problems in deep hard-rock mines. Before excavation, rocks are loaded under a polyaxial condition. Upon excavation, the rocks at the excavation boundaries are loaded in the tangential direction and unloaded in the radial direction. Understanding rock behaviour under this excavation loading condition is critical for developing measures to control rock failure in underground construction. In this paper, numerical simulation results of unstable rock failure using an explicit finite element tool are presented. Firstly, uniaxial compression tests were simulated to confirm the suitability of the adopted numerical tool for simulating unstable rock failures. Transferred energy ratio (TER) and loading system reaction intensity (LSRI) were proposed as indicators to distinguish between stable and unstable failures. Secondly, unstable rock failures under polyaxial unloading conditions were simulated. The influences of loading system stiffness (LSS), specimen's height to width ratio (H/W), and intermediate principal stress ( 2 ) on rock failure were investigated. The simulation results showed that rock failure was more violent when the loading system was softer, the specimen was taller, and the confinement was lower. The modelling approach presented in this paper can be useful for predicting unstable rock failure and estimating released kinetic energy, which is important for designing rock support in deep tunnels to control rockburst damage.Résumé : Les coups de toit sont des phénomènes de rupture de roche instable et constituent les plus grands dangers dans les mines en roche dure. Avant les travaux d'excavation, les roches sont soumises à un chargement multiaxial. Durant ces travaux, les roches situées sur les bords de la mine sont soumises à un chargement tangentiel et le relâchement de charge se fait selon un axe radial. Il est essentiel de bien comprendre le comportement de la roche lors d'une excavation dans de telles conditions de chargement afin de pouvoir mettre en place des mesures visant à limiter la rupture de la roche dans les chantiers souterrains. Dans le présent article, on présente les résultats de simulations numériques de mécanisme de rupture de roche instable, réalisées à l'aide d'une méthode claire, basée sur la méthode des éléments finis. Dans un premier temps, on a simulé des essais de compression uniaxiale pour confirmer la pertinence de la méthode numérique adoptée permettant de simuler les mécanismes de rupture de roche instable. Le taux d'énergie transférée (TET) et l'intensité de la réaction du système de chargement (IRSC) ont été proposés comme indicateurs permettant de faire la distinction entre les ruptures stables et instables. Dans un deuxième temps, on a simulé des ruptures de roche instable dans les conditions de relâchement de charge multiaxial. On a également étudié l'influence de la rigidité du système de chargement (RSC), le quotient de la hauteur du spécimen par la largeur de celui-ci (H/W) et la contrainte principale i...

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“…Due to the importance of this problem, considerable research effort, at an international scale has been devoted to the understanding of the rockburst phenomenon. Although the descriptions are inconsistent, the definition, mechanism and classification of rockbursts by scholars are basically the same [30,31]. Hedley and Kaiser et al [32,33] proposed that a rockburst is defined as damage to an excavation that occurs in a sudden or violent manner and is associated with a seismic event.…”

Section: Introductionmentioning

confidence: 99%

The Prevention and Control Mechanism of Rockburst Hazards and Its Application in the Construction of a Deeply Buried Tunnel

et al. 2019

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Rockburst hazards induced by high geostress are particularly prominent during the construction of underground engineering. Prevention and control of rockburst is still a global challenge in the field of geotechnical engineering, which is of great significance. Based on the tunnel group of the Jinping II hydropower station of China, this paper analyzed the mechanical principle of support in the process of construction, and discussed in detail the active release and passive support by numerical simulation and field application. The results show that as two active measures, stress relieve holes and advanced stress relief blasting can release the energy of the microseismic source and transfer the high stress to the deeper surrounding rock, make the surface rock wall with a relatively low stress act as a protective barrier. Their stress release rate is about 12% and 33% in this project, respectively. In term of passive measure, the combined rapid support, which is mainly composed of water swelling anchor and nano-admixture shotcrete, is also an effective way to prevent and control the rockburst under high geostress.

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Numerical simulation of rock bursts

Cited by 57 publications

References 1 publication

Numerical simulation on rock failure under combined static and dynamic loading during SHPB tests

Numerical simulation on rock failure under combined static and dynamic loading during SHPB tests

Simulation of unstable rock failure under unloading conditions

The Prevention and Control Mechanism of Rockburst Hazards and Its Application in the Construction of a Deeply Buried Tunnel

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