Jointed rock micromechanics

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August undefined, 2024

NettetZhu F W, Dui G S, Ren Q W. A continuum model of jointed rock masses based on micromechanics and its integration algorithm. Sci China Tech Sci, 2011, 54: 581 590, doi: 10.1007/s11431-011-4289-0 Nomenclature Tij transformation matrix between joint local coor- J dinates and global coordinates quantity of one set of joints in per volume i Nettetjoint, in geology, a brittle-fracture surface in rocks along which little or no displacement has occurred. Present in nearly all surface rocks, joints extend in various directions, …

Joint geology Britannica

Nettet1. mar. 2024 · While failure of jointed rocks has been addressed in previous micromechanics-based works, 22, 24, 26, 29, 32, 107 extending the modeling to … NettetStrength. Lianyang Zhang, in Engineering Properties of Rocks (Second Edition), 2024. 7.4.5.2 Model of Amadei (1988) and Amadei and Savage (1989, 1993). The principle … guthrie acoustic guitar

Micromechanics of the velocity and normal stress dependence of rock …

NettetWeak infilled discontinuities commonly exist in rock masses, in which the infill degree of saturation largely influences the overall joint shear behavior and ground stability. However, so far, research on the shear of infilled joints at unsaturated conditions is rare, especially those performed in numerical simulation. Nettet1. jul. 1992 · In the present study, a constitutive model of jointed rock masses is presented which reflects the size, density, orientation and connectivity of joints as well … NettetThe formulation of macroscopic poroelastic behavior of a jointed rock is investigated within the framework of a micro–macro approach. The joints are modeled as interfaces, … boxplot representation

Stability Analysis of Jointed Rock Cutting Slope Based …

Micromechanical approach to effective viscoelastic …

Nettet1. feb. 2011 · The paper is devoted to proposing a constitutive model based on micromechanics. The joints in rock masses are treated as penny-shaped inclusion in … NettetIn this study, microscale numerical models of Lac du Bonnet (LDB) granite (intact and jointed) and a Berea sandstone sample were built to represent the mechanical behavior of hard and soft rocks. Subsequently, several numerical triaxial tests under different confining pressures were conducted to analyze source mechanisms of AE events … guthrie a christmas carol castNettetThe shear behavior and normal closure behavior of rock joints have a major influence on the changes in joint conductivity to be expected during the life of a repository. Methods are described for obtaining the joint parameters required to model these conductivity perturbations. They include the joint roughness and the wall strength, which can both … guthrie acting classes

"Nettet25. sep. 1995 · ABSTRACT:. A blind analysis for the trial excavation of the reduced-scale cavern preceding the construction of the Kazunnogawa power station is carried out … " - Jointed rock micromechanics

Jointed rock micromechanics

Rock Joint Description and Modelling for Prediction of Near …

Nettet1. jul. 1998 · Results for the four forms of jointed rock mass show that: (1) ... These are represented by the Micromechanics-Based Continuum (MBC) model analysis (FE … NettetLast point regarding strength on rock sample scale are mechanical anisotropies on sample scale like cleavage and foliations. For example in a slate or shale with a well-developed …

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NettetAbstract. This paper presents a brief review of the distinct element method (DEM) with particular emphasis on techniques for handling contact detection. In addition, various approaches for parallelization are considered. Our primary focus is on applying the DEM to simulations of the attack and defense of buried facilities. Nettet1. mar. 2024 · Since joints exhibit much poorer mechanical properties than the intact rock matrix while increasing the permeability by providing preferential channels for fluid …

Nettet13. jan. 2024 · The mechanical analysis of complex rock mass is a difficult problem, which often occurs in scientific research and practical engineering. Many achievements have … Nettet14. mai 2024 · In this research, we used precracked rock-like materials (simulating jointed rock masses) to assess the triaxial compression of cracked specimens under axial unloading and radial unloading paths. The research goal was to comparatively analyze and research the mechanical characteristics of cracked specimens to ascertain how …

Nettet10. feb. 2013 · Recently, some numerical models have been proposed to study the behavior of jointed rock, such as the three-dimensional numerical manifold method … Nettet18. sep. 2004 · Jointed rock mass can be regarded as equivalent continuum media if the distribution of fractures are in uniform style, a RVE (representative volume element) …

NettetIn this work, the crack growth behaviour in rock joints under shear load is investigated using the localised gradient damage model (LGDM). ... Journal of Micromechanics and Molecular Physics Vol. 07, No. 03n04, pp. 225-235 (2024) Special Issue: Multiscale of Heterogeneous Materials; Guest Editors: Leong Hien Poh, ...

Nettet1. jul. 2024 · Discrete element method (DEM) is employed to investigate the fracture growth and failure mechanism of increasingly jointed rock samples subjected to … boxplot representsNettet1. jan. 2004 · Cai and Horii [1], [2] proposed a constitutive model for a highly jointed rock mass based on micromechanics paying attention to the deformation of joints prior to stress peaking. The model describes the effects of density, orientation, and connectivity of joints as well as properties of the joints and is suitable for the analysis of compressive … guthrie act clinic sayre paNettet25. jul. 2016 · In this paper, an elasto-plastic damage constitutive model for jointed rock mass is proposed based on the coupling method considering elasto-plastic and damage theories, ... Cai, M. and Kaiser, P.K. (2005), "Assessment of excavation damaged zone using a micromechanics model", Tunn. Undergr. guthrie actorNettet7. jul. 2001 · Kim, H.M., Kuwabara, M., Inoue, J., and H. Horii. "Evaluation of the change in permeability of jointed rock mass due to excavation using Micromechanics-Based Continuum (MBC) model." Paper presented at the DC Rocks 2001, The 38th U.S. Symposium on Rock Mechanics (USRMS), Washington, D.C., July 2001. Download … boxplot reviewNettet13. jan. 2024 · Keywords: complex rock mass, composite material micromechanics method, Eshel by equivalent inclusion theory, ... For a single jointed rock mass, the … guthrie acute rehab towandaNettetABSTRACT. It is generally recognized to date that a rational stability analysis of slopes and foundations in rock masses is a desirable but still rather remote goal of rock mechanics1 In principle, a slope analysis is possible provided the original state of effective stress in the ground is known and the shear strength of the earth material can be … guthrie administrationNettet1. jan. 2004 · In the present study, a micromechanics-based continuum model of a jointed rock mass is proposed and an analysis method for underground excavation is developed. To examine the performance of the proposed method, the excavation of Shiobara power station cavern constructed by the Tokyo Electric Power Co., Ltd. is … boxplot return_type dict