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Dissertations / Theses on the topic 'Rock joints'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 September 2023

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1

Cheng, Pei-fen Caral. "Project report on direct shear tests for rock joints." Click to view the E-thesis via HKUTO, 2002. http://sunzi.lib.hku.hk/hkuto/record/B42576659.

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2

Cheng, Pei-fen Caral, and 鄭佩芬. "Project report on direct shear tests for rock joints." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B42576659.

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3

Snyman, M. F. "Numerical modelling of dilatant rock joints." Doctoral thesis, University of Cape Town, 1991. http://hdl.handle.net/11427/22144.

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Bibliography: pages 107-110.<br>Aluminium forms a highly neurotoxic complex with maltol (3-hydroxy-2-methyl-4H-pyran-one). The stability of this complex has been determined using glass-electrode potentiometry. Owing to the effect on nuclear relaxation behaviour, paramagnetic contrast agents have immense diagnostic potential and have recently received a great deal of attention in the literature. The gadoliniummaltol complex was studied with the view to developing a potential tissue-specific magnetic resonance imaging contrast agent. Because of the interest in medical applications of radioactive

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4

Lazzari, Elisa. "Analysis of shear strength of rock joints with PFC2D." Thesis, KTH, Jord- och bergmekanik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-129740.

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Joints are the main features encountered in rock and sliding of rock blocks on joints is classified as the principal source of instability in underground excavations. In this regard, joints’ peak shear strength is the controlling parameter. However, given the difficulty in estimating it, shear tests are often performed. These are often quite expensive and also time consuming and, therefore, it would be valuable if shear tests could be artificially performed using numerical models. The objective of this study is to prove the possibility to perform virtual numerical shear tests in a PCF2D enviro

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5

Lindfors, Ulf. "Experimental study of the mechanics of rock joints." Licentiate thesis, Luleå tekniska universitet, 1996. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-25833.

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6

Szymakowski, Jerry. "Direct shear testing of jointed soft rock masses." Monash University, Dept. of Civil Engineering, 2003. http://arrow.monash.edu.au/hdl/1959.1/9573.

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7

Nguyen, Van Manh. "Static and dynamic behaviour of joints in schistose rock." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2013. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-126295.

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The shear behaviour of rough rock joints was investigated by both laboratory testing and numerical simulation. The most powerful servo-controlled direct shear box apparatus in the world with normal forces up to 1000 kN, shear loading up to 800 kN and frequencies up to 40 Hz under full load was used to investigate the shear strength of schistose rock blocks with dimensions of up to 350 x 200 x 160 mm in length, width and height, respectively. The experiments were performed to study the behaviour of rough rock joints under constant normal load, constant normal stiffness and dynamic boundary con

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8

Larsson, Jörgen. "Quality aspects in direct shear testing of rock joints." Licentiate thesis, KTH, Jord- och bergmekanik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-294801.

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The stability of rock masses is influenced by the occurrence of rock joints. Therefore, the shear strength of rock joints must be considered in dimensioning of underground constructions. One way to predict the shear strength is through usage of failure criteria, which are validated from results of direct shear tests under controlled laboratory conditions. Consequently, the quality of the results from the tests are crucial to the accuracy with which the criteria will be able to predict the shear strength. Since rock joints are unique by nature usage of replicas (man-made copies of rock joints)

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9

Jade, (B) Sridevi. "Numerical Modeling Of Jointed Rock Mass." Thesis, Indian Institute of Science, 2000. https://etd.iisc.ac.in/handle/2005/257.

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The behavior of jointed rock mass is very complex and is influenced by many factors such as location of joints, joint frequency, joint orientation and joint strength. A thorough review of literature on different aspects of jointed rock mass indicate that the discontinuities or planes of weakness present in rock mass significantly influence its behavior. Numerous experimental tests were conducted to study the behavior of natural as well as artificial joints in rocks. Laboratory tests are time consuming and give results applicable to specific joint fabric and confining pressure. Numerical method

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10

Jade, (B) Sridevi. "Numerical Modeling Of Jointed Rock Mass." Thesis, Indian Institute of Science, 2000. http://hdl.handle.net/2005/257.

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The behavior of jointed rock mass is very complex and is influenced by many factors such as location of joints, joint frequency, joint orientation and joint strength. A thorough review of literature on different aspects of jointed rock mass indicate that the discontinuities or planes of weakness present in rock mass significantly influence its behavior. Numerous experimental tests were conducted to study the behavior of natural as well as artificial joints in rocks. Laboratory tests are time consuming and give results applicable to specific joint fabric and confining pressure. Numerical method

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11

Lavoie, Thierry. "An analytical geomechanical upscaling approach for modeling jointed rock mass behaviour using ubiquitous joints." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/30521.

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Over the past few years, the increase in scale of open pit mines and a need to more accurately predict the subsidence induced by block cave mining have highlighted the need to develop new analytical techniques to replace empirical rock mass rating systems in order to better evaluate fractured rock mass properties and simulate its behaviour. This thesis focuses on the development of an analytical geomechanical upscaling approach for modeling jointed rock mass behaviour in continuum simulations based on the information that can be derived from Discrete Fracture Network (DFN) modelling and labora

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12

Varela, Valdez Alberto. "Mechanical behavior of rock joints : influence of joint roughness on its closure and shear behavior." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0184/document.

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Le comportement mécanique en cisaillement sous contrainte normale constante de joints rocheux est étudié en utilisant une approche numérique par éléments discrets (DEM Discrete Element Model). Les influences respectives de la rugosité des surfaces des joints, de l'élasticité des épontes, de la rupture des aspérités de surface et du niveau de contrainte de compression sur les comportements en fermeture et cisaillement des joints rocheux sont particulièrement analysées. Pour la première fois la rugosité des joints considérée comme auto-affine est utilisée avec DEM pour étudier le frottement des

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13

Camp, Nicholas Julian. "A model for the time dependent behaviour of rock joints." Master's thesis, University of Cape Town, 1989. http://hdl.handle.net/11427/21138.

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This thesis is a theoretical investigation into the time-dependent behaviour of rock joints. Much of the research work that has been conducted to date in the area of finite element analysis has been involved with the development of special elements to deal with these discontinuities. A comprehensive literature survey is undertaken highlighting some of the significant contributions to the modelling of joints. It is then shown how internal variables can be used to model discontinuities in the rock mass. A finite element formulation is described resulting in a system of equations which can easily

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14

Grasselli, G. Grasselli G. "Shear strength of rock joints based on quantified surface description /." [S.l.] : [s.n.], 2001. http://library.epfl.ch/theses/?display=detail&nr=2404.

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15

Pearce, Helen A(Helen Annette) 1971. "Experimental and analytical investigation into the shear behaviour of rock joints." Monash University, Dept. of Civil Engineering, 2001. http://arrow.monash.edu.au/hdl/1959.1/8267.

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16

Um, Jeong-gi. "Accurate quantification of rock joint roughness and development of a new peak shear strength criterion for joints." Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/282509.

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Accurate quantification of roughness is important in modeling strength, deformability and fluid flow behaviors of joints. Both stationary and non-stationary fractional Brownian profiles with known values of the fractal dimension and other profile properties were generated. The generated profiles were in general quite similar to the roughness profiles of natural rock joints. For different values of the input parameter of the line scaling, variogram and roughness-length methods, D was calculated for the generated self-affine profiles to investigate the accuracy of each method. The results obtain

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17

Elsayed, Ahmed. "Experimental Study of the Shear Strenght of Unfilled and Rough Rock Joints." Thesis, KTH, Jord- och bergmekanik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-93151.

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Experimental study of the shear strength of unfilled and rough rock joints Ahmed Elsayed, KTH A series of shear tests have been performed in order to study the influence of matedness on the shear strength of rock joints. The tests have been performed with different degrees of matedness. The purpose is to analyze if the effect from matedness on the peak shear strength can be predicted by using the criterion proposed by Johansson 2009. The first phase of the study involves the measurement of the surface properties of the rock joints using optical scanning. The second step is the use of the mod

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18

Ríos, Bayona Francisco. "Analytical and numerical approaches to estimate peak shear strength of rock joints." Licentiate thesis, KTH, Jord- och bergmekanik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-248019.

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In Sweden, there exists a large number of dams. Many of them are founded on rock masses normally affected by the presence of sub-horizontal rock fractures, which makes sliding along rock joints under the dam foundation one of the most critical failure mechanism. Various attempts have been made to relate the peak shear strength of rock joints to measurable parameters. However, the uncertainty in the determination of the shear strength of rock joints is nonetheless still significant.The main aim of this thesis is to investigate, develop and apply analytical and numerical techniques for estimatio

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19

Fishman, Kenneth Lawrence. "Constitutive modeling of idealized rock joints under quasi-static and cyclic loading." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184365.

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A rather novel plasticity based constitutive model to describe the response of simulated (rock) joints under cyclic, quasi-static and static shear is developed. Development of the constitutive model includes both mathematical formalization based on the hierarchical approach and laboratory testing. The mathematical formulation is such that the model is basic and general and is capable of predicting observed behavior of joints. Laboratory test results are used for the determination of parameters for the model, and for comparison with model predictions. The constitutive model is based on the theo

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20

Hyett, Andrew James. "Numerical and experimental modelling of the potential state of stress in a naturally fractured rock mass." Thesis, Imperial College London, 1990. http://hdl.handle.net/10044/1/46356.

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21

Min, An. "The combined effect of joints and bedding plane parallel discontinuities on rock mass deformation." Thesis, Heriot-Watt University, 1999. http://hdl.handle.net/10399/601.

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22

Andersson, Emil. "Evaluation of influence from matedness on the peak shear strength of natural rock joints." Thesis, KTH, Byggvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-263906.

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In Sweden, the rock mass is commonly used for construction of tunnels and caverns. The rockmass is also used as a foundation for large structures such as bridge abutments and dams. Forthese structures, the understanding of the rock mechanical properties play a key role for reachingan acceptable safety level and minimizing cost. One of the properties that has a high uncertaintyis the shear strength of rock joints. These rock joints constitute the weakest link in the rock massand often govern it´s strength. The uncertainty lies in the amount of factors that affect the shearstrength such as the d

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23

Tam, Chung-yan Candy. "Study of rock joint roughness using 3D laser scanning technique." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/b40203487.

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24

Tam, Chung-yan Candy, and 譚頌欣. "Study of rock joint roughness using 3D laser scanning technique." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B40203487.

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25

Welideniya, H. Senaka. "Laboratory evaluation and modelling of shear strength of infilled joints under constant normal stiffness (CNS) conditions." Department of Civil, Mining and Environmental Engineering - Faculty of Engineering, 2005. http://ro.uow.edu.au/theses/392.

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Infill materials found in natural rock joints may cause a reduction in joint shear strength, influencing rock mass stability. The shear strength of rock mass, already reduced by these discontinuities, will further diminish if they are filled with sediments, thereby posing significant concerns for any construction or excavation carried out in rock. These concerns invite accurate quantification of the shear strength of infilled joints and proper understanding of the basic mechanics of discontinua and the principles involved in their shear deformation. The practical application of any models deve

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26

Nik, Mortaza Gharouni. "Laboratory investigations on the engineering behaviour of rock joints using triaxial and direct shear techniques." Thesis, University of Newcastle Upon Tyne, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308370.

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27

Filiano, Gina L. "Role of Joints and Rock Stresses in the Formation of Sandstone Caves in Northeastern Ohio." University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1411574751.

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28

Johansson, Fredrik. "Shear Strength of Unfilled and Rough Rock Joints in Sliding Stability Analyses of Concrete Dams." Doctoral thesis, Stockholm : Skolan för Arkitektur och samhällsbyggnad, Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10450.

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29

Bollaert, Erik. "Transient water pressures in joints and formation of rock scour due to high-velocity jet impact /." Lausanne : Laboratoire de constructions hydrauliques, 2002. http://library.epfl.ch/theses/?nr=2548.

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30

Oliva, Victor Hugo Gaitán. "Propagação de fraturas em juntas rugosas não-persistentes." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/18/18132/tde-01032005-172004/.

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O presente trabalho foi realizado para estudar o efeito sobre a propagação de fraturas em juntas não-persistentes quando existe uma variação da rugosidade nas juntas. Para esta abordagem, foram analisados os modos de coalescência, o ângulo de início das fraturas, a resistência à compressão e deformação de modelos de argamassa contendo juntas não-persistentes e submetidos a estados biaxiais de tensão. Na literatura especializada encontram-se vários trabalhos que estudam o comportamento de juntas lisas não-persistentes. Infelizmente, este tipo de juntas não leva em conta os efeitos da dilatância

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31

Fathi, Ali. "Dégradation des aspérités des joints rocheux sous différentes conditions de chargement." Thèse, Université de Sherbrooke, 2015. http://hdl.handle.net/11143/8176.

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Résumé: L’objectif de cette thèse est d’interpréter la dégradation des aspérités des joints rocheux sous différentes conditions de chargement. Pour cela, la variation des aspérités durant les différentes étapes du cisaillement d’un joint rocheux est observée. Selon le concept appelé “tiny windows”, une nouvelle méthodologie de caractérisation des épontes des joints a été développée. La méthodologie est basée sur les coordonnées tridimensionnelles de la surface des joints et elles sont mesurées après chaque essai. Après la reconstruction du modèle géométrique de la surface du joint, les zones e

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32

Song, Yongxiang. "Réalisation du système triaxial assisté par ordinateur et étude du cisaillement direct 3D pour joints rocheux." Grenoble 1, 1992. http://www.theses.fr/1992GRE10209.

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On presente dans cette these un systeme triaxial assiste par ordinateur et un appareillage de cisaillement direct pour joints rocheux. Ce systeme triaxial de revolution est constitue par une presse electromecanique commerciale et deux controleurs pression-volume, ainsi qu'un micro-ordinateur avec une carte d'acquisition (a/n, n/a et e/s). Ce systeme pilote par l'ordinateur peut realiser tous les essais triaxiaux asservis en deformation ou en contrainte, ainsi que des essais cycliques. Un nouvel essai en escalier, draine ou non draine, est presente. Ce type de chemin trouve son interet dans des

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33

Nguyen, Van Manh [Verfasser], Heinz [Akademischer Betreuer] Konietzky, Heinz [Gutachter] Konietzky, Christof [Gutachter] Lempp, and Quang Phich [Gutachter] Nguyen. "Static and dynamic behaviour of joints in schistose rock : lab testing and numerical simulation / Van Manh Nguyen ; Gutachter: Heinz Konietzky, Christof Lempp, Quang Phich Nguyen ; Betreuer: Heinz Konietzky." Freiberg : Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2013. http://d-nb.info/1220837342/34.

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34

Wong, Chi-ho Howard. "Parametric study for a cavern in jointed rock using a distinct element model /." View the Table of Contents & Abstract, 2006. http://sunzi.lib.hku.hk/hkuto/record/B36616746.

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35

Wong, Chi-ho Howard, and 黃志豪. "Parametric study for a cavern in jointed rock using a distinct elementmodel." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B45014383.

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36

Jaber, Jana. "Application de la fabrication additive à la modélisation physique des joints et des massifs rocheux, par approches expérimentales et numériques." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0071.

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Cette thèse présente une étude de l’application de la fabrication additive (connue sous le nom d’impression 3D) à la mécanique des roches. Elle s’inscrit dans le cadre d’un projet plus large visant à construire un modèle physique de 2m3 d’un massif rocheux explicitement discontinu, dont le comportement est contrôlé principalement par les discontinuités. La technique de fabrication additive adoptée est le frittage laser (SLS), le matériau utilisé est un polymère : le polyamide 12 (PA12). Dans un premier temps des joints artificiels construits par SLS sont testés sous essais de cisaillement à co

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37

Ghazal, Rima. "Modélisation de la stabilité des blocs rocheux isolés sur la paroi des excavations souterraines avec prise en compte des contraintes initiales et du comportement non linéaire des joints." Phd thesis, Ecole Nationale Supérieure des Mines de Paris, 2013. http://pastel.archives-ouvertes.fr/pastel-00934081.

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L'instabilité des blocs situés à la surface des excavations souterraines est un problème courant dans les milieux rocheux fracturés. Comme les méthodes exactes prenant en compte tous les blocs et leurs interactions sont très lourdes, l'approche des Blocs Isolés est souvent adoptée. Elle consiste à étudier chaque bloc en considérant qu'il est rigide et que le reste de la masse rocheuse est rigide et fixe. Néanmoins, aucune des méthodes existantes adoptant cette approche ne prend en compte de façon rigoureuse les contraintes initiales et le comportement des joints. Dans cette thèse, on développe

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38

Pine, R. J. "Rock joint and rock mass behaviour during pressurised hydraulic injections." Thesis, University of Exeter, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374872.

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The hydro-mechanical effects of high pressure fluid injections into jointed rock are considered mostly in the context of Hot Dry Rock (HDR) geothermal energy systems. In Part I, the mai n aspects ari sing from the HDR research at the "Camborne School of Mines (CSM) and Los Alamos Nat iana 1 Laboratory (LANL) projects are reviewed. Previous approaches to fluid-rock interacti ons at these projects and important observed phenomena are highlighted. Fundamental aspects of rock joint geometry, mechanical behaviour and flow regimes within jointed rock are also reviewed. These aspects are then related

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39

Iwano, Masahiro. "Hydromechanical characteristics of a single rock joint." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/38741.

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40

Mas, Ivars Diego. "Bonded Particle Model for Jointed Rock Mass." Doctoral thesis, KTH, Teknisk geologi och geofysik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-12055.

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Jointed rock masses are formed of intact rock and joints. There-fore, proper characterization of rock mass behavior has to consid-er the combined behavior of the intact rock blocks and that of the joints. This thesis presents the theoretical background of the Synthetic Rock Mass (SRM) modeling technique along with example applica-tions. The SRM technique is a new approach for simulating the mechanical behavior of jointed rock masses. The technique uses the Bonded Particle Model (BPM) for rock to represent intact ma-terial and the Smooth-Joint Contact Model (SJM) to represent the in situ joint

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41

Wang, Jinan. "Morphology and mechanical behavior of rock joints." Rozprawa doktorska, 1994. https://repolis.bg.polsl.pl/dlibra/docmetadata?showContent=true&id=3316.

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42

Wang, Jinan. "Morphology and mechanical behavior of rock joints." Rozprawa doktorska, 1994. https://repolis.bg.polsl.pl/dlibra/docmetadata?showContent=true&id=3312.

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43

Wang, Jinan. "Morphology and mechanical behavior of rock joints." Rozprawa doktorska, 1994. https://delibra.bg.polsl.pl/dlibra/docmetadata?showContent=true&id=3312.

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Wang, Jinan. "Morphology and mechanical behavior of rock joints." Rozprawa doktorska, 1994. https://delibra.bg.polsl.pl/dlibra/docmetadata?showContent=true&id=3316.

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45

Resende, José Ricardo Pontes. "An investigation of stress wave propagation through rock joints and rock masses." Doctoral thesis, 2010. http://hdl.handle.net/10216/60524.

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46

Resende, José Ricardo Pontes. "An investigation of stress wave propagation through rock joints and rock masses." Tese, 2010. http://hdl.handle.net/10216/60524.

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47

Huang, Gan-Zhong, and 黃幹鐘. "Numerical Analysis of Fluid Flow Through Rock Joints." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/94305479504558463359.

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碩士<br>國立中央大學<br>土木工程研究所<br>83<br>Fluid flow through rock joints is commonly described by the parallel plate model. However deviations from this model are expected because real joint surfaces are rough and contact each other at discrete points. In order to consider the surface roughness effect on fluid flowing through joints, pairs of rough surfaces generated by fractal model of surface topography are placed together at various mechanical apertures to form a series of "joints" and a finite

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48

Chen, Mau-Chi, and 陳懋琦. "A Study on Constitutive Model of Rock Joints." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/14680556772432397836.

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碩士<br>國立臺灣大學<br>土木工程學系<br>85<br>ABSTRACTA Study on Constitutive Model of Rock Joints A two dimensional constitutive model for rock joint behaviour from the view point of the micro-mechanics is proposed first. The undulation of joint profile is modeled by joint elements. The mechanical behaviour between two corresponding joint elements are simulated by the interface element that is connected with normal and shear stiffness spring. The model considers force equilibrium besides moment equi

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49

Sebastian, Resmi. "Elastic Wave Propagation and Evaluation of Low Strain Dynamic Properties in Jointed Rocks." Thesis, 2015. http://etd.iisc.ac.in/handle/2005/3653.

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When the point under consideration is not near to the source of vibration, the strains developed in the rock mass due to the passage of waves are usually of small magnitude, and within the elastic range. However, the rock mass may be subjected to a wide range of strain levels depending on the source of vibration and the wave frequency, even within the elastic limit. The present study is based on the two general conditions existing at field, long wave length propagation of waves and intermediate wavelength propagation of waves. When the wavelength of propagating wave is much longer than the jo

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Sebastian, Resmi. "Elastic Wave Propagation and Evaluation of Low Strain Dynamic Properties in Jointed Rocks." Thesis, 2015. http://etd.iisc.ernet.in/2005/3653.

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When the point under consideration is not near to the source of vibration, the strains developed in the rock mass due to the passage of waves are usually of small magnitude, and within the elastic range. However, the rock mass may be subjected to a wide range of strain levels depending on the source of vibration and the wave frequency, even within the elastic limit. The present study is based on the two general conditions existing at field, long wave length propagation of waves and intermediate wavelength propagation of waves. When the wavelength of propagating wave is much longer than the jo

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