By using the socalled geological strength index gsi as a scaling parameter, the hoek brown criterion for the strength of intact cores in triaxial tests, as shown in eq. Underground excavations in rock paperback dec 31 1990 by evert hoek author, ted brown author 4. Underground excavations in rock by evert hoek, ted brown doc. Underground excavations and tunnelling springerlink. This book deals with the geotechnical aspects of the design of underground openings for mining and civil engineering purposes. Brown in 1980 for the design of underground excavations. The yield surface is nonlinear, and is based on the relation between the major and minor principal stresses. Support in underground hard rock minesevert hoek drilling and blasting for. Sorry, we are unable to provide the full text but you may find it at the following locations. Underground excavation in rock pb by evert hoek quick free delivery in 214 days. The criterion now incorporates both intact rock and discontinuities, such as joints, characterized by the geological strength index gsi, into a system designed to estimate the mechanical behaviour of typical rock masses encountered in tunnels, slopes and foundations. 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.
It contains a number of worked examples to assist the reader in applying the techniques described to his or her own problems. A comparison between hoekbrown and bieniawski criteria for. 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. Ground support in mining and underground construction. Support of underground excavations in hard rock crc press. Rock lab failure criterion of a rock mass according to hoek. Application of convergenceconfinement method of tunnel design to rock masses that satisfy hoek brown failure criterion.
Hence, when constructing underground works in hard rock, two general scenarios are encountered. 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. As a result, the rock mass strength near underground excavations is controlled by failure mechanisms dominating at low confinement. Evert hoek was born in zimbabwe, graduated in mechanical engineering from the university of cape town and became involved in rock mechanics in 1958 when he started working in research on problems of brittle fracture associated with very deep mines in south africa. Brief history of the hoekbrown criterion page 1 of 4.
As noted earlier, joints and defects in a rock mass reduce the strength of the mass below the strength of an intact specimen of the same rock type hoek et al. Rs3 is a 3d finite element analysis program that can be used for a wide range of applications in both rock and soil, such as underground excavations, sequenced tunneling, surface excavations, slope stability, seepage analysis, consolidation analysis, and much more. Chapter topics include risk assessment in design, evaluation of engineering geological data, rock mass classification, support design. The 2020 program will focus on technical advances and innovative applied research in rock mechanics and geomechanics. In the middle distance, in the centre of the picture, is mount toc with the unstable slope visible as a white scar on the mountain side above the waterline.
Analysis of rocksupport interaction using numerical and. This manual looks at the selection of support systems for the construction of tunnels, underground mining excavations and underground power caverns in hard rock. Buy underground excavations in rock 1 by hoek, evert isbn. The model incorporates a plasticity flow rule that varies as a function of the confining stress level geotechnical construction in rock mass. The holy bible by king james version 2017, leather 2.
It can be used for a wide range of engineering projects and includes support design, finite element slope stability, groundwater seepage and probabilistic analysis. 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. A comparison between hoek brown and bieniawski criteria for coal and rocks s m f hossainil abstract the applicability of bieniawski and hoek brown empirical strength criteria has been assessed for different groups of coal and various types of intact rocks by using a vast number of published triaxial test data from various places. Rock mass properties for underground mines citeseerx. Institution of mining and metallurgy 527 pages hoek, e. Support of underground excavations in hard rock hoek, evert. Underground excavations in rock evert hoek, ted brown. Strength of rock and rock masses, isrm news journal, 22, 416. 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 elastoplastic response of underground excavations in. 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. Hoek, brown underground excavation in rock ebook download as pdf file. This chapter deals with the question of in situ stresses and also with the stress changes that are induced when tunnels or caverns are excavated in stressed rock. 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.
A brief history of the development of the hoekbrown. Underground excavations in rock by evert hoek, ted brown mobipocket underground excavations in rock by evert hoek, ted brown epub 1fiv48dyjmw. Online underground excavations in rock by evert hoek, ted brown ebook pdf download. Underground excavations in rock hoek and brown pdf. The original version of the hoekbrown criterion was developed by evert hoek and e. Features fullscreen sharing embed analytics article stories visual stories seo. Gjovik cavern 19911993, largest rock cavern of 61 m span.
The hoekbrown failure criterion is an empirical stress surface that is used in rock mechanics to predict the failure of rock. The hoek brown failure criterion for rock masses is widely accepted and has been applied in a large number of projects around the world. Hoek eb, brown et 1980 underground excavations in rock. The original version of the hoek brown criterion was developed by evert hoek and e. 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. They are used to maintain the stability of underground openings and reinforce disturbed rock masses. Rocscience is proud to host a library on rock engineering from the worldrenowned expert, dr. Scribd is the worlds largest social reading and publishing site. Get your kindle here, or download a free kindle reading app. Geotechnical engineering design of a tunnel support system. 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. Cat underground hard rock mining equipment caterpillar. Underground excavations in rock evert hoek, edwin t. The software also calculates the strength parameters of the rock mass, allows for the calculation of the bearing capacity of foundations on rock according to the methods of carter kulhawy, serrano olalla gonzales.
Underground excavations in rock by evert hoek, ted brown. Therefore in this book you can find both the theoretical aspects and the practical applications. In 1988, the criterion was extended for applicability to slope stability and surface excavation problems. Underground excavations in rock deals with the geotechnical aspects of the design of underground openings for mining and civil engineering processes. The american rock mechanics association 54 th us rock mechanics geomechanics symposium is to be held in golden, colorado, usa, on 28 june 1 july 2020. The hoekbrown failure criterion and gsi 2018 edition. In rock engineering for underground excavations, proc. Lmr start of rock tbm 1951, at the oahe dam shale and later at the humber sewer hard rock tunnels. 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. Upon completion of the course, students will be able to. Program according to hoek and brown for 2d stress analysis by the boundary element method. Sc eng principal, golder associates, excavations 224 west 8th avenue, vancouver vsy in5, canada e.
These support systems should be matched to the characterstics of the rock mass and the excavation techniques adopted. Rock support systems have become widely dominant components in underground hard rock mines. Applicability of the geological strength index gsi classification for very weak and sheared rock masses. 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. Brown et ed 1981 rock characterization testing and. Support of underground excavations in hard rock crc. Hoek,brown underground excavation in rock free ebook download as pdf file. Support of underground excavations in hard rock analyses are carried out manually, as described in hoek and bray. Underground hard rock caterpillar offers a range of underground mining systems and solutions to meet your high production demands and lower your cost per ton. The criterion was required in order to provide input information for the design of underground excavations. In the hoekbrownpac model, the material properties.
While, in general, it has been found to be satisfactory. Underground excavations in rock deals with the geotechnical aspects of the design of. Underground excavations in rock 1st edition evert hoek. This paper is intended to illustrate the relationship between the hoekbrown parameters describing the strength of rock masses and the. Support of underground excavations in hard rock civil. In modern engineering mine design, the rock mass strength is usually estimated prior to excavation using borehole data i. The rock mass strength is defined here as the limiting load required for stress driven failures to initiate and propagate around underground excavations.
Analysis of rocksupport interaction using numerical and multiple. Evaluation of ground management in underground excavation. Hoek brown model the hoek brown yield criterion characterizes the stress conditions that lead to failure in intact rock and rock masses. Hoek, brown underground excavation in rock free download pdf. The elastoplastic response of underground excavations in rock. Considerations of rock dilation on modeling failure and. Everyday low prices and free delivery on eligible orders. Support of underground excavations in hard rock hoek, e. Rock slope engineering civil engineering i am menglim. The model incorporates a plasticity flow rule that varies as a function of the confining stress level. The hoek brown criterion was introduced in 1980 to provide input for the design of underground excavations in rock. Seikan tunnel 197288, 54 km long with undersea length of 23 km. Hoek and brown 1980a, 1980b proposed a method for obtaining estimates of the strength of jointed rock masses, based upon an assessment of.
Modified hoek brown model a modified hoek brown model the mhoek model provides an alternative to the hoek brown model with a stressdependent plastic flow rule, described above. Problems, associated with failure of the rock around underground openings and with. Support of underground excavations in hard rock mirarco. Examples of benefits of underground urban public transportation systems, report of the working group on costsbenefits of underground urban public transportation, tunnelling and underground space technology, vol. Rocdata rock, soil and discontinuity strength analysis. Underground excavations and tunnelling involve the removal of soil or rock masses from their initial locations. Practical application of the gsi system and the hoekbrown failure criterion in a number. Software for the determination of the failure criterion of a rock mass according to the model of hoekbrown 2002. Underground excavations in rock hoek and brown pdf hoek, brown underground excavation in rock free ebook download as pdf file. Nov 15, 20 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. Citeseerx document details isaac councill, lee giles, pradeep teregowda. Support of underground excavations in hard rock by hoek. Guidelines for numerical modelling of rock support. Underground excavations in rock by evert hoek, 9780419160304, available at book depository with free delivery worldwide.
579 1091 435 1435 213 128 1511 748 1494 1546 311 443 586 922 1408 694 969 149 601 63 699 712 400 626 617 563 1534 1200 1489 1011 630 120 1045 1302 859 916 453 292 59 1225