Strength Of Non Persistent Rock Joints
Download Strength Of Non Persistent Rock Joints full books in PDF, epub, and Kindle. Read online free Strength Of Non Persistent Rock Joints ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Author | : S. Muhammad Jamil |
Publisher | : |
Total Pages | : 604 |
Release | : 1992 |
Genre | : |
ISBN | : |
The present experimental study was conducted to investigate strength-anisotropy and failure modes of closed, persistent and non-persistent rock joints under biaxial loading. Previous investigations concerning the behavior of rock masses were conducted by simulating the rock mass as an assemblage of unit blocks. This arrangement is susceptible to rotation, imperfect contacts, and surface mismatch of the individual elements. In this study a procedure was developed to form closed, persistent and non-persistent joints in the sample, during casting, to represent the in-situ behavior of a rock mass containing joints of a single set. For joints capable of sliding, failure in rock masses with non-persistent joints can either be along the joints or stepping (sliding along joint segment and tension failure between the joint rows). The Mohr-Coulomb shear criterion is suitable for predicting failure along the joints; but failure by stepping needs another approach, which takes into account the failure in tension. The Mohr-Coulomb criterion in conjunction with the proposed expression gives satisfactory agreement with the test results. The parameters investigated are: orientation with respect to the applied axial load, confining pressure, degree of persistence, and relative joint density. Samples with joints oriented at 22.5$spcirc$ to the axial stress failed along the joints under all conditions. Joints oriented at 67.5$spcirc$ consistently failed by stepping between joint rows. Joints oriented at 45$spcirc$ exhibited two modes of failure: failure along the joints (Mode 1) and stopping (Mode 2). The stepping failure mode occurred only under unconfined conditions for the degree of persistence of 0.667. Samples with joints oriented at 80$spcirc$ also exhibited two failure modes: an apparent stepping failure between closely spaced joints, in a zone along multiple surfaces (Mode 3), and a fracture through intact rock (Mode 4) with no significant influence for widely spaced joint. The transition from stepping to shearing across the joints occurred when the relative joint density was decreased from 2 to 1. The effect of joint orientation on the deformation modulus for non-persistent joints was found to be insignificant. The degree of persistence and relative joint density were found to influence deformation modulus, and could be described in terms of the effective joint stiffness.
Author | : Omer Sulieman Mughieda |
Publisher | : |
Total Pages | : 512 |
Release | : 1997 |
Genre | : |
ISBN | : |
Author | : Sergio A.B. Fontoura |
Publisher | : CRC Press |
Total Pages | : 3791 |
Release | : 2019-09-03 |
Genre | : Technology & Engineering |
ISBN | : 1000758370 |
Rock Mechanics for Natural Resources and Infrastructure Development contains the proceedings of the 14th ISRM International Congress (ISRM 2019, Foz do Iguaçu, Brazil, 13-19 September 2019). Starting in 1966 in Lisbon, Portugal, the International Society for Rock Mechanics and Rock Engineering (ISRM) holds its Congress every four years. At this 14th occasion, the Congress brings together researchers, professors, engineers and students around contemporary themes relevant to rock mechanics and rock engineering. Rock Mechanics for Natural Resources and Infrastructure Development contains 7 Keynote Lectures and 449 papers in ten chapters, covering topics ranging from fundamental research in rock mechanics, laboratory and experimental field studies, and petroleum, mining and civil engineering applications. Also included are the prestigious ISRM Award Lectures, the Leopold Muller Award Lecture by professor Peter K. Kaiser. and the Manuel Rocha Award Lecture by Dr. Quinghua Lei. Rock Mechanics for Natural Resources and Infrastructure Development is a must-read for academics, engineers and students involved in rock mechanics and engineering. Proceedings in Earth and geosciences - Volume 6 The ‘Proceedings in Earth and geosciences’ series contains proceedings of peer-reviewed international conferences dealing in earth and geosciences. The main topics covered by the series include: geotechnical engineering, underground construction, mining, rock mechanics, soil mechanics and hydrogeology.
Author | : Walter Wittke |
Publisher | : John Wiley & Sons |
Total Pages | : 865 |
Release | : 2014-04-07 |
Genre | : Technology & Engineering |
ISBN | : 3433604290 |
Dieses Buch konzentriert sich auf die Grundlagen der Felsmechanik als Basis für den sicheren und wirtschaftlichen Entwurf und Bau von Tunneln, Dämmen und Böschungen in geklüftetem und anisotropem Fels. Es ist in vier Hauptteile gegliedert: Grundlagen und Modelle Berechnungs- und Entwurfsmethoden Erkundungen, Versuche, Messung und Beobachtung Anwendungen und Fallbeispiele. Die felsmechanischen Modelle berücksichtigen den Einfluss von Trennflächen auf das Spannungs-Dehnungs-Verhalten und die Durchlässigkeit von geklüftetem Fels. Dieses Buch ist für: Bau- und Bergbauingenieure Geologen Studenten aus den entsprechenden Bereichen
Author | : |
Publisher | : World Scientific |
Total Pages | : 513 |
Release | : 2011 |
Genre | : Plasticity |
ISBN | : 9814324051 |
The aim is to introduce recent advances in engineering plasticity and its applications. The scope covers a wide range of topics on metals, rock soil, rubber, ceramics, polymers, composites, etc., which are involved in engineering plasticity. The papers represent a diverse nature of engineering plasticity and its application, which include constitutive modeling, damage, fracture, fatigue and failure, crash dynamics, structural plasticity, multi-scale plasticity, crystal plasticity, etc.
Author | : John A. Hudson |
Publisher | : Thomas Telford |
Total Pages | : 514 |
Release | : 1992 |
Genre | : Mining engineering |
ISBN | : 9780727716880 |
Author | : R K Goel |
Publisher | : Elsevier |
Total Pages | : 382 |
Release | : 2011-08-09 |
Genre | : Technology & Engineering |
ISBN | : 0123858798 |
Rock mass classification methods are commonly used at the preliminary design stages of a construction project when there is very little information. It forms the bases for design and estimation of the required amount and type of rock support and groundwater control measures. Encompassing nearly all aspects of rock mass classifications in detail, Civil Engineering Rock Mass Classification: Tunnelling, Foundations and Landsides provides construction engineers and managers with extensive practical knowledge which is time-tested in the projects in Himalaya and other parts of the world in complex geological conditions. Rock mass classification is an essential element of feasibility studies for any near surface construction project prior to any excavation or disturbances made to earth. Written by an author team with over 50 years of experience in some of the most difficult mining regions of the world, Civil Engineering Rock Mass Classification: Tunnelling, Foundations and Landsides provides construction engineers, construction managers and mining engineers with the tools and methods to gather geotechnical data, either from rock cuts, drifts or core, and process the information for subsequent analysis. The goal is to use effective mapping techniques to obtain data can be used as input for any of the established rock classification systems. The book covers all of the commonly used classification methods including: Barton’s Q and Q’ systems, Bieniawski’s RMR, Laubscher’s MRMR and Hoek’s and GSI systems. With this book in hand, engineers will be able to gather geotechnical data, either from rock cuts, drifts or core, and process the information for subsequent analysis. Rich with international case studies and worked out equations, the focus of the book is on the practical gathering information for purposes of analysis and design. Identify the most significant parameters influencing the behaviour of a rock mass Divide a particular rock mass formulation into groups of similar behaviour, rock mass classes of varying quality Provide a basis of understanding the characteristics of each rock mass class Relate the experience of rock conditions at one site to the conditions and experience encountered at others Derive quantitative data and guidelines for engineering design Provide common basis for communication between engineers and geologists
Author | : Erik Eberhardt |
Publisher | : CRC Press |
Total Pages | : 1772 |
Release | : 2007-05-17 |
Genre | : Science |
ISBN | : 1439856575 |
Ore extraction through surface and underground mining continues to involve deeper excavations in more complex rock mass conditions. Communities and infrastructure are increasingly exposed to rock slope hazards as they expand further into rugged mountainous terrains. Energy needs are accelerating the development of new hydroelectric dams and exploit
Author | : Jianjun Li |
Publisher | : World Scientific |
Total Pages | : 513 |
Release | : 2011-05-09 |
Genre | : Technology & Engineering |
ISBN | : 9814462985 |
The aim is to introduce recent advances in engineering plasticity and its applications. The scope covers a wide range of topics on metals, rock soil, rubber, ceramics, polymers, composites, etc., which are involved in engineering plasticity. The papers represent a diverse nature of engineering plasticity and its application, which include constitutive modeling, damage, fracture, fatigue and failure, crash dynamics, structural plasticity, multi-scale plasticity, crystal plasticity, etc.
Author | : Jian Zhao |
Publisher | : Elsevier |
Total Pages | : 309 |
Release | : 2003-12-18 |
Genre | : Technology & Engineering |
ISBN | : 0080541631 |
Provides practical solutions to the challenge of modeling and analyzing rock masses Consolidates a wealth of previously published technical papers on the subject and introduces previously unseen material This authoritative title is a key reference for any Geo-engineer. Rock masses differ considerably from man-made materials, and their properties can vary with location, direction and time. As a result there is a critical need to capture these variations via modeling and analysis. Zhu and Zhao provide an expert introduction to the techniques and analytical methods needed for studying underground excavations in fractured rock masses. The book brings together previously published and new material to provide a comprehensive and up-to-date reference. Provides practical solutions to the challenge of modeling and analyzing rock masses Consolidates a wealth of previously published technical papers on the subject and introduces previously unseen material