Hence, adopting a burstresistant rock support system is the utmost necessary to minimizecontrol the failure of underground excavations hoek et al. A comparison of methods for determining mi, the hoekbrown. Rock lab failure criterion of a rock mass according to. Our analysis of existing databases on rock material properties such as sheorey, douglas and rocscience demonstrates that there. Hoek,brown underground excavation in rock free ebook download as pdf file. Analysis of underground excavations incorporating the. In modern engineering mine design, the rock mass strength is usually estimated prior to excavation using borehole data i. Documents and settingsbernard amadeimy documentsmy. The original failure criterion was developed during the preparation of the book. Hoek,brown underground excavation in rock mining tunnel. Strengthstress ratio contours in rock surrounding powerhouse caverns of different shape. Therefore in this book you can find both the theoretical aspects and the practical applications.
Seikan tunnel 197288, 54 km long with undersea length of 23 km. Underground excavations in rock deals with the geotechnical aspects of the design of underground openings for mining and civil engineering processes. The first two sections summarize some of the current knowledge on stability and failure modes in underground openings. The friction angles and the cohesions are calculated from the hoekbrown parameters. Stability analysis and rock bolting design in a multiple joint rock mass. Timedependent tensile strengths of bushveld complex rocks. Underground excavations in rock transportation research board. The rock mass strength is defined here as the limiting load required for stress driven failures to initiate and propagate around underground excavations.
Lo grc director and professor emeritus the university of western ontario, london, on, canada abstract urban developments require construction close to adjacent structures or directly above underground infrastructure. Hoek is probably currently the master of rock mechanics having not only invented many applied theories including hoekbrown criteria but also being a well known international consultant. This work resulted from close collaboration between industry and university in the. Hoek and brown 1980a, 1980b proposed a method for obtaining. Coupled hydromechanical analysis of excavation damage.
Fairhustthe elastoplastic response of underground excavations in rock masses that satisfy the hoekbrown failure criterion int j rock mech min sci, 36 1999, pp. Support of underground excavations in hard rock crc. Other writers have not always been consistent with hoeks approach in their application of the mogi line as an upper. Dec 31, 1990 underground excavations in rock deals with the geotechnical aspects of the design of underground openings for mining and civil engineering processes. Take into account a number of factors such as deep rock mass quality, rock strength, etc, surrounding rock mass plastic zone of deep underground chamber is. Scribd is the worlds largest social reading and publishing site. Geotechnical properties of the rock layers are obtained from 5. Extensive laboratory and in situ tests have been historically undertaken by the mine to characterise the strength and stiffness behaviour of the rock salt. The hoekbrown failure criterion is implemented into comsol multiphysics.
Analysis of underground excavations incorporating the strain. Underground excavations in rock 1st edition evert hoek. To clarify, definitions of a few expressions related to the behaviour of rock masses underground are. Stress and strain distributions around typical mining excavations since failure of rock around mining excavations at shallow depth is commonly observed, it was considered appropriate to. Brief historical development of hoek brown criterion. Underground excavations in rock deals with the geotechnical aspects of the design of underground openings for mining and civil engineering. Based on this, a system using rmi parameters in rock support design has been developed. Support of underground excavations in hard rock hoek, evert. Recent work by hoek using the hoekbrown failure criterion and the geological strength index showed that for weak rocks gsi jan 01, 2010 read application of the convergenceconfinement method to tunnels in rock masses exhibiting hoekbrown strainsoftening behaviour, international journal of rock mechanics and mining sciences on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Stress, instability and design of underground excavations. Design of large underground caverns for hydroelectric. Underground excavations and tunnelling involve the removal of soil or rock masses from their initial locations. Institution of mining and metallurgy 527 pages hoek, e.
The coupled finite element analysis is performed for a deep geological repository which is in its planning stage. The use of rmi in design of rock support in underground openings. Analysis on surrounding rock mass plastic zone of deep underground chamber based on hoek brown criterion p. Brief history of the hoek brown criterion page 1 of 4 a brief history of the development of the hoek brown failure criterion prepared by evert hoek 10 june 2002 1980 hoek e. Hoek, brown underground excavation in rock free ebook download as pdf file. Brief history of the hoekbrown criterion page 1 of 4.
Support of underground excavations in hard rock crc press book the safe and economical construction of tunnels, mines, and other subterranean works depends on the correct choice of support systems to ensure that the excavations are stable. The effects of deep excavations in soils and rock on adjacent structures the 2011 r. Kop underground excavations in rock av evert hoek, ted brown pa. These support systems should be matched to the characterstics of the rock mass and the excavation techniques adopted. The relation between the changes in the effective plastic strains and the permeability of the rock mass is used in the hydromechanical analysis. The hoekbrown failure criterion is intended for use in the brittle range of rock behaviour, and this controls the range of minor principal stress. Generalized hoekbrown criterion is indicated as a dimensionless quantity, on this basis, elasticplastic analytical method of circular underground chamber is presented based on generalized hoekbrown criterion in uniform stress field.
This work resulted from close collaboration between industry and university in the fields of precompetitive research. Knowledge of the magnitudes and directions of these in situ and induced stresses is an essential component of underground excavation design since, in many cases, the strength of the rock is exceeded and the resulting instability can have serious consequences on. Estimating hoekbrown rock mass strength parameters from rock. Support of underground excavations in hard rock crc press book. Underground excavations in rock evert hoek, edwin t.
Chapter topics include risk assessment in design, evaluation of engineering geological data, rock mass classification, support design for overstressed rock, progressive spalling in massive brittle rock, rock bolts and dowels, cablebolt reinforcement and shotcrete support. The effects of deep excavations in soils and rock on. Sc eng principal, golder associates, excavations 224 west 8th avenue, vancouver vsy in5, canada e. Ground support in mining and underground construction. Hoek brown failure criterion using a linear approximation of the curvilinear envelope failure criterion of hoekbrown, in a range of stress field, one can obtain the parameters of cohesion and angle of shearing resistance of mohrcoulomb data required compressive strength of the intact rock, gsi geological strength index, specific parameters of the rock mass, disturbance. Observations of faceparallel slabbing or spalling at low confining stress suggest extension as a fracturing mechanism. Hoek is probably currently the master of rock mechanics having not only invented many applied theories including hoek brown criteria but also being a well known international consultant. From this study the hoek brown rock mass failure criterion was identified as the optimum existing criterion for predicting the intact strength and rock mass strength of coal measure strata. Knowledge of the magnitudes and directions of these in situ and induced stresses is an essential component of underground excavation design since, in many cases, the strength of the rock is exceeded and the resulting instability can have serious consequences on the behaviour of the excavations.
Gjovik cavern 19911993, largest rock cavern of 61 m span. D london university professer of rock mechanics, imper ial college of science and technology, sou th kensington, london sw7 2bp, eng land the institution of mining and metallurgy, london. Underground excavations in rock evert hoek, ted brown. Buy underground excavations in rock 1 by hoek, evert isbn. Coupled hydromechanical analysis of excavation damaged. An example of underground excavation design in weak rock is that for the. Support of underground excavations in hard rock is the most complete and uptodate manual for use in the design of excavations and support mechanisms for underground mines.
Lmr start of rock tbm 1951, at the oahe dam shale and later at the humber sewer hard rock tunnels. A finite element program is developed for the analysis of underground openings excavated at considerable depth or in weak rocks. The intact rock constant, mi, is one of the three basic input parameters required for the widely used hoekbrown failure criterion. The safe and economical construction of tunnels, mines, and other subterranean works depends on the correct choice of support systems to ensure that the excavations are stable. Fairhustthe elastoplastic response of underground excavations in rock masses that satisfy the hoekbrown failure criterion int j rock. Analysis of underground excavations incorporating the strain softening of rock masses. The hoekbrown strength criterion was applied to estimate the strength of the rock mass at.
Books, images, historic newspapers, maps, archives and more. Rock mass properties for underground mines evert hoek 1. It contains a number of worked examples to assist the reader in applying the techniques described to his or her own problems. Recent work by hoek using the hoekbrown failure criterion and the geological strength index showed that for weak rocks gsi brown is the author of underground excavations in rock 4. Thompson synopsis a systematic study of groundwater conditions at eight underground mine sites exhibiting a wide range of groundwater qualities throughout australia has been completed at the wa school of mines. Analysis on surrounding rock mass plastic zone of deep. Support of underground excavations in hard rock civil. K the safe and economical construction of tunnels, mines, and other subterranean works depends on the correct choice of support systems to ensure that the excavations are stable.
Brief history of the hoekbrown criterion page 1 of 4 a brief history of the development of the hoekbrown failure criterion prepared by evert hoek 10 june 2002 1980 hoek e. Support of underground excavations in hard rock by hoek. The book support of underground excavations in hard rock testifies to the willingness of canadian industries and universities to collaborate in the field of precompetitive research and learning, to jointly pursue excellence, and to work together towards the economic and social betterment of our society. Support of underground excavations in hard rock hoek, e. Anyone setting out to write a book on the design of under g round excavations in rock son n published by e. Everyday low prices and free delivery on eligible orders. Underground excavations in rock by evert hoek, 9780419160304, available at book depository with free delivery worldwide. Upon completion of the course, students will be able to.
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