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Keywords: criterion
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Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-513
... strength parameters (Fig. 1). The non-dimensional parameter b controls the de- gree of curvature of the envelope, while the scale parameter A has the dimensions [ s ](1-b) (Charles & Soares 1984b). Previous stability analyses with nonlinear failure criterions were limited to 2-D slopes (e.g. Charles...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-494
...ASSESSMENT OF NEW ZEALAND GREYWACKE ROCK MASSES WITH THE HOEK-BROWN FAILURE CRITERION Stuart A L Read1, Laurie Richards2 and Nick D Perrin3 ABSTRACT Application of the Hoek-Brown failure criterion to New Zealand hard greywacke rocks leads to unrealistically high predictions of rock mass strength...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-474
...A SIMPLE CRITERION FOR CREEP INDUCED FAILURE OF OVER-CONSOLIDATED CLAYS Gavan J. Hunter1, Nasser Khalili2 ABSTRACT A simple criterion for creep induced failure is proposed for drained loading of over-consolidated clays. The criterion is proposed for the prediction of the long-term shear strength...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-604
... medium, leading to analytical solutions under simplified geometry, and has been applied to analyze the displacement behavior of a reinforced tunnel face under spherical symmetry (Wong et al., 2000). strength mechanism tunnel face macroscopic strength criterion homogeneous material criterion...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-402
... ABSTRACT: Many flood protection dikes were damaged in both eastern and western Hokkaido, Japan during large earthquakes in 1993 and 1994 due to liquefaction in the foundations. A criterion based on crest settlement was developed for prioritizing remediation of the diking system to resist...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-034
... ABSTRACT: This paper is in two parts. The first part presents an overview of the strength of intact rock. A short commentary on various methods of fitting failure criteria to experimental data follows, it is demonstrated that the method of fitting the criterion to the test data has a major...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-035
... between these blocks. This method was modified over the years in order to meet the needs of users who applied it to problems that were not considered when the original criterion was developed (Hoek 1983, Hoek and Brown 1988). The application of the method to poor quality rock masses required further...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-045
... criterion used. An example is given to illustrate the capability of the proposed numerical procedure. INTRODUCTION In their natural state most soils are somewhat anisotropic. Due to the mode of deposition and subsequent loading of soil masses, measurements have shown that the particles tend to adopt a...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-633
... ABSTRACT: This paper discusses the application of the Convergence-Confinement method of tunnel design to rock masses that are assumed to obey the Hoek-Brown failure criterion. The basis of the Convergence-Confinement method and the interpretation of the three basic components of the method...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-612
.... reservoir geomechanics acoustic emission technique delay time core specimen Reservoir Characterization criterion stress determination MPa loading relation variation soft sedimentary rock drift wall Upstream Oil & Gas calculation specimen Kaiser effect determination situ stress stress...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 10–12, 1990
Paper Number: ISRM-IS-1990-012
... excavation tunnel deformation criterion variation lining carnallite tachyhydrite Static and Dynamic Considerations in Rock Engineering, Brummer (ed.) © 1990 Balkema, Rotterdam. ISBN 90 6191 1532 Micro-Computer modelling and practical design/monitoring of large underground excavations C.Douat...
Proceedings Papers

Paper presented at the ISRM International Symposium, August 30–September 2, 1989
Paper Number: ISRM-IS-1989-165
... plastic region will depend on the assumptions of (a) the yield criterion; (b) the use of associated or non-associated flow rule; and (c) the dilatancy angle~. Under the axisymmetric plane strain condition, the strains and the displacements are expressed as ur f r _Lu 8r r' - 0 where the subscript r, 8 and...
Proceedings Papers

Paper presented at the ISRM International Symposium, August 30–September 2, 1989
Paper Number: ISRM-IS-1989-167
... material model is described as follows: Linear elasticity up to a linear Mohr-Coulomb failure criterion. After reaching the Mohr-Coulomb criterion the material fails with a sudden volume increase. The broken material then behaves fol- lowing soil-mechanics with no further volume change. The given...
Proceedings Papers

Paper presented at the ISRM International Symposium, August 30–September 2, 1989
Paper Number: ISRM-IS-1989-003
... ductile behaviors is observed by the increase of the confining pressure. Upstream Oil & Gas normal stress minimum principal stress minimum stress Reservoir Characterization strength strain energy stress state metals & mining criterion experiment fracture strength triaxial...
Proceedings Papers

Paper presented at the ISRM International Symposium, August 30–September 2, 1989
Paper Number: ISRM-IS-1989-018
... Reservoir Characterization drilling operation pore pressure wellbore integrity strength History specimen Wellbore Design triaxial loading shale Upstream Oil & Gas criterion critical state borehole instability stress level weald clay peak strength mechanical behaviour...
Proceedings Papers

Paper presented at the ISRM International Symposium, August 30–September 2, 1989
Paper Number: ISRM-IS-1989-004
... parameter's single hexagonal pyramidal failure surface suitable extensively to rock-like materials, which thought the effects of both the intermediate principal stress and the hydrostatic pressure at one time, and formed the correspondent criterion for rock-like materials. 1 INTRODUCTION: In the...
Proceedings Papers

Paper presented at the ISRM International Symposium, August 30–September 2, 1989
Paper Number: ISRM-IS-1989-005
... conditions, close to those, acting within the massif, are described. The program on mechanical tests of rocks is carried out, depending upon the calculated qualitative changes of principal stresses and three-di- mensionally stressed states near the mine workings. The developed ener- gy criterion of rock...
Proceedings Papers

Paper presented at the ISRM International Symposium, August 30–September 2, 1989
Paper Number: ISRM-IS-1989-006
... ABSTRACT: The strength characteristics of rocks at depth can be, in the first instance, best revealed by conducting triaxial tests in the laboratory. From the available literature, triaxial test data of a large number of rocks has been used to from an empirical non-linear strength criterion...
Proceedings Papers

Paper presented at the ISRM International Symposium, August 30–September 2, 1989
Paper Number: ISRM-IS-1989-002
... strain rates of d /dt=10- 2 -10-¹ 2 S-¹: brittle yield and dilation at low σm, ideally elastoplastic and non-dilative behavior at high σm' transition from viscoelastic to viscoplastic creep as r rises, of steady-state cracking (with an-nealing), rate dependence of the yield criterion, and primary creep...
Proceedings Papers

Paper presented at the ISRM International Symposium, August 30–September 2, 1989
Paper Number: ISRM-IS-1989-007
... be taken into con- sideration at present), and to examine certain laws governing. separately, the brittle railure and the brittle-ductile transition in sandstones. 2 LINEAR STRENGTH CRITERION FOR SANDSTONES An induced stress theory or brittle railure or rocks has been developed CKwa~niewski. 19S6b...

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