Rock Mechanics with Emphasis on Stress


Book Description

On a global scale, crustal stresses are the result of plate tectonics. On a regional basis, the knowledge of stresses is of vital interest for deep mining, geothermal heat exploitation for electricity generation from deep hot rock formations, safe underground hazardous waste disposal scenarios in impermeable rock, and large-scale tunneling for high-speed traffic. This book originated in a workshop on Rock Mechanics with Emphasis on In-Situ Stress. The areas of focus includes a deeper understanding of large earthquake focal mechanics, the "Hot Dry Rock" (HDR) concept of geothermal energy exploitation, and the development of strategies for the stimulation of deep-seated fresh water reservoirs. Rock Mechanics with Emphasis on Stress will be of interest to geologists, seismologists, and geotechnical and civil engineers.




Rock Stress and Its Measurement


Book Description

Rock masses are initially stressed in their current in situ state of stress and to a lesser natural state. Whether one is interested in the extent on the monitoring of stress change. formation of geological structures (folds, faults, The subject of paleostresses is only briefly intrusions, etc. ), the stability of artificial struc discussed. tures (tunnels, caverns, mines, surface excava The last 30 years have seen a major advance our knowledge and understanding of rock tions, etc. ), or the stability of boreholes, a in the in situ or virgin stress field, stress. A large body of data is now available on knowledge of along with other rock mass properties, is the state of stress in the near surface of the needed in order to predict the response of rock Earth's crust (upper 3-4km of the crust). masses to the disturbance associated with those Various theories have been proposed regarding structures. Stress in rock is usually described the origin of in situ stresses and how gravity, within the context of continuum mechanics. It is tectonics, erosion, lateral straining, rock fabric, defined at a point and is represented by a glaciation and deglaciation, topography, curva second-order Cartesian tensor with six compo ture of the Earth and other active geological nents. Because of its definition, rock stress is an features and processes contribute to the current enigmatic and fictitious quantity creating chal in situ stress field.




Fundamentals and Applications of Rock Mechanics


Book Description

Rock mechanics is a first course in the field of mining and geotechnical engineering. Over the last decades, the concepts and applications of rock mechanics have evolved tremendously for understanding the stability and safety of structures made of/on the rock masses. This book elaborates the fundamental concepts of rock mechanics for designing and analysis of structures and excavations for a variety of applications. The text includes a fine blend of theory and worked-out examples and applications, and also emphasises the basics of stress and strain analysis, volume–weight relationship, rock mass classification systems, in situ stress measurements, stresses around underground opening, pillar and support design, subsidence, slope stability, rock failure criteria and behaviour of jointed rock mass. Numerical analysis procedures and interaction between rock bolts and rock masses are also introduced emphasising the mechanics and applications in rock engineering. Besides undergraduate and postgraduate students of civil (including geotechnical), mining and petroleum engineering, the book will also benefit the practicing engineers and researchers, who wish to acquaint themselves with state-of-the-art techniques of rock mechanics and its applications. Overall, this textbook is useful for both elementary as well as advanced learning.







Rock Anisotropy and the Theory of Stress Measurements


Book Description

Any undisturbed rock mass is subject to natural stresses inclu ding gravitational stresses due to the mass of the overburden and possibly tectonic stresses due to the straining of the earth's crust and remanent stresses due to past tectonism. Knowledge of the in situ stress field must be integrated into any rock engineering design along with general rock mass characteristics such as de for mability, strength, permeability and time dependent behavior. For example, the choice of optimum orientation and shape of deep underground caverns or complex underground works will be controlled by the orientation and the magnitude of the in situ stress @ield if it is necessary to minimize stress concentration problems. Long term variation of the in situ stress field may also help to evaluate the potential hazard of earthquake occurences. The magnitude and orientation of the stress field ata point within a rock mass can be measured but there is no known method by which the state of stress at a point can be accurately determined by instruments located remotely. In general, measurements are made inside boreholes, on outcrops or on the internal surfaces of under ground cavities. Most of the measuring techniques intentionally disturb the state of stress in the rock and then measure consequent strains and displacements. Measured strains or displacements are then related to the stresses through assumptions of material behavior. A common procedure is to assume that the rock mass is linearly elastic, isotropic, continuous and homogeneous.




Fundamentals of Rock Mechanics


Book Description

Widely regarded as the most authoritative and comprehensive book inits field, the fourth edition of Fundamentals of RockMechanics includes new and substantially updated chapters tothis highly praised text. Extensively updated throughout, this new edition containssubstantially expanded chapters on poroelasticity, wavepropogation, and subsurface stresses Features entirely new chapters on rock fractures andmicromechanical models of rock behaviour Discusses fundamental concepts such as stress and strain Offers a thorough introduction to the subject before expertlydelving into a fundamental, self-contained discussion of specifictopics Unavailable for many years, now back by popular demand. An Instructor manual CD-ROM for this title is available. Pleasecontact our Higher Education team at ahref="mailto:[email protected]"[email protected]/afor more information. Reviews: “With this attention to detail, and rigorous adherence toclarity and exactness in description, this edition will consolidatethe standing achieved by the earlier editions as a mostauthoritative and comprehensive book in its field. It will continueto serve as a leading reference work for geoscientists interestedin structural geology, tectonics and petrophysics as well as forcivil, mining and petroleum engineers.” (PetroleumGeoscience) "...I consider this book to be an invaluable reference forstudying and understanding the fundamental science at the base ofrock mechanics. I believe this to be a must-have textbook and Istrongly recommend it to anyone, student or professional,interested in the subject." (Rock Mechanics and RockEngineering) "An excellent book, very well presented, and is a must for theshelves of serious engineers and scientists active or interested inthe fields of rock mechanics and rock engineering.... Highlyrecommended." (South African Geographical Journal, 2008)




Rock Mechanics


Book Description

This new edition has been completely revised to reflect the notable innovations in mining engineering and the remarkable developments in the science of rock mechanics and the practice of rock angineering taht have taken place over the last two decades. Although "Rock Mechanics for Underground Mining" addresses many of the rock mechanics issues that arise in underground mining engineering, it is not a text exclusively for mining applications. Based on extensive professional research and teaching experience, this book will provide an authoratative and comprehensive text for final year undergraduates and commencing postgraduate stydents. For profesional practitioners, not only will it be of interests to mining and geological engineers, but also to civil engineers, structural mining geologists and geophysicists as a standard work for professional reference purposes.




Engineering Rock Mechanics


Book Description

Engineering rock mechanics is the discipline used to design structures built in rock. These structures encompass building foundations, dams, slopes, shafts, tunnels, caverns, hydroelectric schemes, mines, radioactive waste repositories and geothermal energy projects: in short, any structure built on or in a rock mass. Despite the variety of projects that use rock engineering, the principles remain the same. Engineering Rock Mechanics clearly and systematically explains the key principles behind rock engineering. The book covers the basic rock mechanics principles; how to study the interactions between these principles and a discussion on the fundamentals of excavation and support and the application of these in the design of surface and underground structures. Engineering Rock Mechanics is recommended as an across-the-board source of information for the benefit of anyone involved in rock mechanics and rock engineering.




Fundamentals of Rock Mechanics


Book Description




Rock Mechanics: Theoretical fundamentals


Book Description

The basic concepts of continuous media mechanics are reviewed in the first part of this book. More particularly, the concept of plasticity is introduced from a thermodynamics standpoint. The second part, devoted to material strain mechanics, is an approach to the major constitutive laws independent of time. Emphasis is laid on solid-fluid-temperature coupling (thermoporous media). Two specific plasticity models are presented - the Cambridge model for clays, the Lade model for chalk. The third part deals with the mechanisms of material cohesion loss. A description of the conventional theory of elastic brittle fracture is followed by an examination of extremely recent concepts like homogenization or statistical damage to brittle materials. The final chapter examines the fundamental problem of shearing bands and the theory of bifurcation as an approach to solving it.