Hydro-elasto-viscoplastic modeling of a drift at the Meuse/Haute-Marne underground research laboratoratory (URL)

Souley, Mountaka; Armand, Gilles; Kazmierczak, Jean-Bernard

doi:10.1016/j.compgeo.2016.12.012

Cited by 25 publications

(7 citation statements)

References 29 publications

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“…In other words, the matrix remains plastically isotropic. It is this same isotropic plasticity assumption that has been assumed for identifying the Hoek-Brown parameters for elastic limit, peak and residual strengths of COx claystone from laboratory data (Souley et al 2011, Zhang and Rothfuchs 2004, Souley et al 2017, Zhang 2016.…”

Section: Main Assumptionsmentioning

confidence: 99%

“…It has been shown that a failure criterion based on the Hoek and Brown (1980) criterion (eq. 1) is suitable for describing the shear strength of the COx claystone (Su 2003;Souley et al 2011;Souley et al 2017). However, since the COx claystone in its natural state have no tectonic fractures, classical signification of the Hoek and Brown parameters cannot be used for determining the rock mass strength from the results of tests on samples and taking into account the fracturing of the rock.…”

Section: Case Of the Intact Rock Matrixmentioning

confidence: 99%

“…We also considered a parabolic evolution of parameter B as a function of  for the hardening in pre-peak and softening in post-peak, with horizontal tangents at peak and the beginning of the residual phase. Details of the yield function evolution from initial plasticity to peak (pre-peak regime) and then to residual behaviour (post-peak regime) are referred to Souley et al (2011Souley et al ( , 2017. The yield function corresponding to different loading (elastic limit; peak and residual) are shown in Fig.…”

Section: Case Of the Intact Rock Matrixmentioning

confidence: 99%

“…Particularly, a benchmark exercise has been proposed in order to provide an overall view of the developed and used models regarding the field observations (Seyedi et al 2017). Modelling based on both discrete elements (Yao et al 2017) and continuum mechanics (Manica et al 2017;Pardoen et al 2015;Pardoen and Collin 2017;Souley et al 2017;Trivellato et al 2019) approaches has been considered. However, inherent anisotropy is usually necessary to model the anisotropic shapes of EFZ, as well as the anisotropy in convergences for the gallery GCS (//H).…”

Section: Introductionmentioning

confidence: 99%

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3D Modelling of Excavation-Induced Anisotropic Responses of Deep Drifts at the Meuse/Haute-Marne URL

Souley

Armand

2022

Rock Mech Rock Eng

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Understanding the excavation induced fractured zone (EFZ) around drifts is paramount in the context of the deep geological disposal for nuclear waste since fractures can introduce pathways for the migration of radionuclides.Drifts in the Meuse/Haute-Marne Underground Research Laboratory (URL) have been essentially excavated following the two main directions of major and minor horizontal stresses. Field observations on the two drifts GCS (parallel to major horizontal stress direction) and GED (parallel to minor horizontal stress direction) in the URL show anisotropic shapes of EFZ around drifts through both orientations and anisotropic convergences. These anisotropic responses resulted from the inherent and/or induced anisotropies of the host rock; as well as the anisotropic stress field.This study focuses on 3D numerical modelling of excavation induced anisotropic responses including shape and extent of EFZ, and short term convergences of drifts. The main assumption is that the failure of claystone material is due to fracturing along weakness planes (ubiquitous joints) and the failure of the rock matrix. The ubiquitous joint failure is represented by perfectly plastic models for both tensile and shear yield functions. Their orientation is determined from the stress state based on the fracture mechanics, which includes tensile, longitudinal splitting and shear (conjugate planes) cracks. The rock matrix is assumed to be elastoplastic with hardening, softening and residual behaviours. Confining pressure dependency for the post-peak behaviour with a brittle-ductile transition is taken into account for the rock matrix. The proposed model is implemented into a commercial numerical software FLAC 3D . The main features of the implemented model are shown by the simulation of laboratory triaxial compression tests, as well as field observation within the URL. In particular, comparisons between 3D simulations of GCS and GED drifts with in situ observations shows promising results, which demonstrates advances of present model advances with respect to existing models.

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Section: Main Assumptionsmentioning

confidence: 99%

Section: Case Of the Intact Rock Matrixmentioning

confidence: 99%

Section: Case Of the Intact Rock Matrixmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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3D Modelling of Excavation-Induced Anisotropic Responses of Deep Drifts at the Meuse/Haute-Marne URL

Souley

Armand

2022

Rock Mech Rock Eng

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“…e similar rockburst study was experienced at the Kolar goldfield, India in the 1960s [34]. Moreover, in order to examine the excavation damaged zone (EDZ), many field laboratories were established, such asÄspö Hard Rock Laboratory (HRL) [35,36,37] in Sweden, AECL Underground Research Laboratory (URL) [38,39,40] in Canada, Kamaishi mine [41] and Mizunami Underground Research Laboratory [42] in Japan, Mont Terri Rock Laboratory [43,44] and Grimsel Test Site [45] in Switzerland, Mol Underground Research Laboratory [46,47] in Belgium, and Meuse/Haute-Marne Underground Research Laboratory [48,49] in France. In China, the rockburst studies in the tunneling of Jinping project made significant contributions to the development of rockburst prediction [50,51].…”

Section: Rock Damage and Failure Under Quasi-static Loadingmentioning

confidence: 99%

Numerical Simulation on Damage and Failure Mechanism of Rock under Combined Multiple Strain Rates

Zhu

Wei

Niu

et al. 2018

Shock and Vibration

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During underground hard-rock mining, the drilling and blasting method currently remains the most economical excavation method, and the rock may experience a multistrain-rate spectrum under quasi-static, dynamic, and rheological loading conditions and their combination as well. The study on the damage mechanism of rock under multistrain-rate condition that induced by mining excavation is the fundamental issue for predicting the mining-induced hazards such as rockburst. In this study, the state of the art of rock damage and failure under different strain rates is reviewed first. Then, the numerical model for rock failure under multiple strain rates is formulated when the rock damage is taken as the main thread. Meanwhile, we summarize our work in this area over the past ten years, and the constitutive law for the damage and failure of rock under multistrain rates is presented. Finally, several numerical examples, i.e., rock damage and failure under combined static and dynamic load, rock damage and failure triggered by dynamic stress redistribution due to excavation, rock damage and failure induced by blasting, and rock damage and failure due to the combination of dynamic disturbance and rheological load, are presented. Based on these numerical simulations, the associated rock damage mechanism and failure behaviors under differently combined multiple strain rates are clarified, which may provide a theoretical basis for clarifying the rock failure mechanism during rockbursts and rock blasting. Also, further studies on the damage and failure of rock under multiple strain rates are suggested.

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A Method for Estimating the Highest Potential Hydraulic Conductivity in the Excavation Damaged Zone in Mudstone

Aoyagi

Ishii

2018

Rock Mech Rock Eng

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Hydro-elasto-viscoplastic modeling of a drift at the Meuse/Haute-Marne underground research laboratoratory (URL)

Cited by 25 publications

References 29 publications

3D Modelling of Excavation-Induced Anisotropic Responses of Deep Drifts at the Meuse/Haute-Marne URL

3D Modelling of Excavation-Induced Anisotropic Responses of Deep Drifts at the Meuse/Haute-Marne URL

Numerical Simulation on Damage and Failure Mechanism of Rock under Combined Multiple Strain Rates

A Method for Estimating the Highest Potential Hydraulic Conductivity in the Excavation Damaged Zone in Mudstone

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