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Keywords: plastic zone
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Proceedings Papers

Paper presented at the 13th ISRM International Congress of Rock Mechanics, May 10–13, 2015
Paper Number: ISRM-13CONGRESS-2015-075
... to next step Step 4: Calculate the displacement of each mesh node, and draw the displacement contour map Step 5: Select a proper displacement contour as the slope sliding surface according to the distribution of the plastic zone, and determine the landslide body Step 6: Remove those mesh elements within...
Proceedings Papers

Paper presented at the 13th ISRM International Congress of Rock Mechanics, May 10–13, 2015
Paper Number: ISRM-13CONGRESS-2015-371
... exists in elasto-plastic analyses: The stress state in a plastic zone must satisfy a yielding criterion such as that of Mohr-Coulomb. In order to make the stress state satisfy the criterion, an excess stress beyond the yielding criterion should be transferred to an elastic zone existing outside...
Proceedings Papers

Paper presented at the 13th ISRM International Congress of Rock Mechanics, May 10–13, 2015
Paper Number: ISRM-13CONGRESS-2015-106
.... The radius of the plastic zone is positively correlated with in-situ stress but negatively correlated with yield stress, power hardening index, pore pressure and Biot coefficient. Initiation modes include tensile failure and shear failure when rock is yielded. For elastic-plastic reservoir...
Proceedings Papers

Paper presented at the 12th ISRM Congress, October 16–21, 2011
Paper Number: ISRM-12CONGRESS-2011-306
... Nanao tunnel convergence plastic zone execution rank deformation rate input constant immediate tunnel ring closure support scale rock mass bench length control standard value tunnel closure timing closure timing cross section closure tunnel deformation Harmonising Rock...
Proceedings Papers

Paper presented at the 11th ISRM Congress, July 9–13, 2007
Paper Number: ISRM-11CONGRESS-2007-175
... METHOD If a circular tunnel is created in a rock mass, annulus of plas- tic zone may be formed as shown in Figure 1. The extent of the zone, of cause, depends on the dimension of tunnel, the stress condition, and the strength of rock mass. Furthermore, the plastic zone may be divided into the strain...
Proceedings Papers

Paper presented at the 11th ISRM Congress, July 9–13, 2007
Paper Number: ISRM-11CONGRESS-2007-216
... structural geology variation convergence shear stress friction angle Reservoir Characterization weak zone interface shear stress plastic zone tunnel Thickness variability excavation gotthard basetunnel permeability deformation Upstream Oil & Gas sensitivity Kovari...
Proceedings Papers

Paper presented at the 10th ISRM Congress, September 8–12, 2003
Paper Number: ISRM-10CONGRESS-2003-018
... fairly subjective. reservoir simulation numerical simulation algorithm BEM numerical model domain integral boundary element method plastic zone sequential excavation element method mesh excavation rock mass Material Behaviour calculation contour isoband tunnel excavation...
Proceedings Papers

Paper presented at the 10th ISRM Congress, September 8–12, 2003
Paper Number: ISRM-10CONGRESS-2003-124
... instability plastic zone distinct element method fuzzy logic stability analysis shear displacement rock mass rock cut slope stability analysis Failure analysis reinforcement additional cut sinpal-ildong region cut gradient displacement slope stability analysis wedge failure construction 753...
Proceedings Papers

Paper presented at the 8th ISRM Congress, September 25–29, 1995
Paper Number: ISRM-8CONGRESS-1995-097
... internal heating presentation loading thermo-viscoplastic behaviour Reservoir Characterization heating assumption plastic zone tunnel thermal loading lacq clay analytical solution underground gallery Thermoplastic and thermo-viscoplastic behaviours of underground cavities Comportement...
Proceedings Papers

Paper presented at the 7th ISRM Congress, September 16–20, 1991
Paper Number: ISRM-7CONGRESS-1991-312
... of buildings and the in-situ determination of the extent of the plastic zone in underground construction. RESUME: La sonde à fente pour forages, developee à l"origine par l"Universite James Cook, Townsville/Australie, a ete mis sur le marche par la maison INTERFELS GmbH en 1990. En comparaison du prototype...
Proceedings Papers

Paper presented at the 5th ISRM Congress, April 10–15, 1983
Paper Number: ISRM-5CONGRESS-1983-166
... pore Moscow coal variation borehole seam coal face metals & mining probl calculation khristianovich outburst-prone situation stress relief fracture outburst plastic zone gas pressure SEVERAL BASIC ASPECTS OF THE FORMING OF SUDDEN OUTBURSTS OF COAL (ROCK) AND GAS Quelques...
Proceedings Papers

Paper presented at the 5th ISRM Congress, April 10–15, 1983
Paper Number: ISRM-5CONGRESS-1983-198
.... reservoir geomechanics strength elastic stress solution sandstone Reservoir Characterization fracture initiation pressure stress solution fluid pressure critical flow rate wellbore stability criterion flow rate risne perforation Upstream Oil & Gas criterion equation arch plastic zone...
Proceedings Papers

Paper presented at the 4th ISRM Congress, September 2–8, 1979
Paper Number: ISRM-4CONGRESS-1979-220
... the former, assuming each to be subjected to the same initial ground stresses. Reservoir Characterization conceptual model rock behaviour consequence compatibility hoover bag convergence plastic zone cavity strain brittleness characteristic surface loading practical aspect Artificial...
Proceedings Papers

Paper presented at the 2nd ISRM Congress, September 21–26, 1970
Paper Number: ISRM-2CONGRESS-1970-144
... method is made to simulate the progress of drilling. The advent of plastic action on the basis of Mohr criterion and the development of elastic and foward plastic zones that contribute the stability of the borehole are studied. The critical depth of collapse is determined. Introduction Stresses...

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