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Keywords: discontinuity
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Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-454
..., a Quaternary tectonics characterized by mostly vertical movements caused the development of several sets of discontinuities in the rocks (DÕAngelo et al., 1979); additional discontinuity systems are, on the other hand, related to gravitational deformations, due to the superimposition of the calcarenitic...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-459
... leads in a rock mass quality underestimation, which mainly due to the rating adjustment for discontinuity orientations as especially proposed for rock slopes. The case records evaluation indicate that the rock mass rating without taking into account the discontinuities adjustment give a more realistic...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-468
..., and it was possible to correlate the folding observed on the three sites with the regional scale folding. Please note that all discontinuity orientations given are dip/azimuth, and are given as magnetic bearings. Artilligan The rock at Artilligan consists of inter-layered strong to weak up to 3.0m thick bands of mica...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-429
... ABSTRACT: A "step-path" method for determining the statistical shear strength along critical failure paths through jointed rock slopes is reviewed. The computed shear strength is a function of both sliding and "stepping-up" along sets of suitably orientated geological discontinuities within...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-455
...GENERATING DISCONTINUITY ORIENTATION DATA FOR USE IN PROBABILISTIC MODELS FOR MODELLING EXCAVATIONS IN ROCK. Anthony (Tony) G. Meyers1 and Stephen D. Priest2 ABSTRACT Proprietary probabilistic software generally requires discontinuity orientation to be defined according to two distributions, one...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-425
... Reservoir Characterization stability assessment cliff face investigation unstable rhyolite cliff discontinuity plane rhyolite cliff loosening terrestrial photogrammetry structural geology unstable part discontinuity rock mass remedial measure STABILITY ASSESSMENT OF AN UNSTABLE RHYOLITE...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-523
... into the UDEC model. reverse scarp History flexural excavation metals & mining Tasmania centre pit schist western wall displacement discontinuity sequence North Pit slope angle Horizontal Drainhole savage river foliation shear Orebody ANALYSIS OF FLEXURAL TOPPLING AT AUSTRALIAN...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-435
... in the modeling of the physical process. relation probability theory discontinuity zadeh Engineering geotechnical engineering water pressure Artificial Intelligence rock bearing strength modeling information application excessive settlement fuzzy logic clay layer fuzzy characterization model...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-475
...SHEAR STRENGTH EQUATION FOR ROCK JOINTS, BASED ON 3-D SURFACE CHARACTERIZATION Giovanni Grasselli1, Peter Egger2 ABSTRACT Rock mass is heterogeneous, anisotropic and discontinuous. When civil engineering structures like dams are founded on rock, they transmit normal and shear stresses to the joints...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-481
... monitoring system debris profile 2 discontinuity intensely fractured rock mass rockfall boulder italian western alp numerical modeling Efficiency geo-structural survey multidisciplinary approach landslide area photogrammetrical survey safety germanasca valley...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-564
... of width, 48 m of height and more than 80 m of length in the Candoglia quarry). structural geology cavern marble excavation Reservoir Characterization strength stability analysis stability pillar block recovery Upstream Oil & Gas dimension discontinuity rock mass reservoir...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-466
... and friction angle. However, cohesion may be highly variable in the deposits and it deteriorates on loading, leading to precarious conditions of stability. Sub-vertical cuts in pozzolana may also collapse due to the presence of discontinuities hidden in the rock mass, such as tension cracks at the top...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-427
... the stability of rock cuttings. The basic theory of RMR is based on the statistical analysis of field observa-tions of rock discontinuities, ground water conditions, and laboratory tests for rock strength parameters. These rock mass classifications are usually applied and used with observational methods...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-516
... methods such as the finite element method (FEM) with joint or interface element by, among others, Goodman et al. (1968), distinct element method (DEM) by Cundall (1971) and discontinuities deformation analysis (DDA) by Shi (1988) can be accounted for. In spite of all these techniques, it is difficult...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-437
... ABSTRACT: Lithological units have been classified geotechnically with mechanical tests and discontinuity measurements in the Rotowaro coal mine open pits, New Zealand. Using these measurements slope stability probability classifications (SSPC) have been quantified based on an adaption...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-512
... Office of the Hong Kong SAR Government. FIELD OBSERVATIONS During the course of this study, some twenty five sites, the majority related to slope formation projects, have been selected for field examination and assessment, largely based on the observations that kaolin-infilled discontinuities were...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-532
.... This is often undertaken by applying geostatistics, assuming a random distribution to establish the relationship between discontinuities. There are problems in this approach, as discontinuities commonly exhibit a geological control. By relating fabric elements the nature of structures, relative timing...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-580
... ABSTRACT: Deformation and failure mechanism of rock masses are governed by the characteristics of geometrical distribution of discontinuities and the mechanical behavior in a single discontinuity. It is thought that stability of rock structures extremely depend on not only the existing...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-046
...THE FAILURE SIMULATION OF ROCK MASSES BY DISCONTINUOUS DEFORMATION ANALYSIS Zhou Weiyuan1, Qiang Tianchi2 and Yang Ruoqiong3 ABSTRACT Di sc ont inu ou s Defo rmati on An aly sis ( DDA) i s a n ove l met hod u sed to a nal yze t he mot io nal la w for di sc ont inu ou s, joi nt ed roc k mas ses . Th...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-026
... to effect the greasing and sheathing of selected sections of pre-cut strand tendons, which although discontinuous as in operation, had distinct advantage in avoidance of application followed by removal (Photo 3). The development of these refined systems did in the view of certain specialist contractors make...

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