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Keywords: scale effect
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Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-117
... Reservoir Characterization saliferous rock sample mechanism second-class scale effect surface layer metals & mining strength quasi-plastic saliferous rock mechanical indicator Upstream Oil & Gas upper kama potash salt deposit scale effect mechanism Indicator reservoir...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-118
... ABSTRACT: Nowadays, most of the rock pillar design methods have as a normal procedure the considerations of the scale effects between the laboratory tests results and the in situ parameters to be considered for behavior of the rock pillar prediction. Therefore, the authors of this paper have...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-096
... Abstract Observations often display an intact rock strength decrease as specimen size increases. Existing attempts for reproducing this scale effect mainly rely on the introduction of defects as discrete cracks or veins. We propose a continuous approach where the rock micro-scale strength...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-078
... to designate surface areas of the samples from which it ceases asymptotically the scale effect observed in the discontinuity strength) of the discontinuity strength in magmatic rocks is about 250 cm2 (Leal-Gomes 1998) and in sedimentary rocks probably much higher. However, much smaller areas of samples...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-013
... descriptions. Engineering Rock mechanics consideration roughness amplitude University scale effect rock joint limit equilibrium model shear strength Upstream Oil & Gas Barton Patton asperity Archambault strength strain energy amplitude rock mass equation Rock Engineering...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-111
... Abstract In the main studies and theories that normally support the design of pillars in underground mines, two effects to be considered have been proposed in the more technically developed methods: the scale effect and the shape effect. Both of great importance and both, although apparently...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-014
... analysed to highlight the influence of scale effects on the rock mass degree of fracturing evaluation. 1 Introduction A rock mass is a discontinuous medium made of rock blocks delimited by discontinuities, which generally are the subjects of in situ surveys. Different characteristics, defined...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2010, June 15–18, 2010
Paper Number: ISRM-EUROCK-2010-021
..., rock mechanics experiments were performed on core and cubic specimens. It was understood from preliminary studies that the scale effect on the uniaxial compressive strength (UCS) does not exist when the diameter (D) and width (W) for both specimen types are D ≥50mm andW≥50 mm. Some experiments were...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2005, May 18–20, 2005
Paper Number: ISRM-EUROCK-2005-102
... ABSTRACT Scale effect is a phenomenon of growing importance in rock mechanics, however large scale experiments are difficult to handle, and numerical modeling can be an easier way to study it. This paper presents some improvements made on the previously developed model for large shear...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 96, September 2–5, 1996
Paper Number: ISRM-EUROCK-1996-019
... caused by roughness. Therefore, the scale effect observed in many situations is artributed to variations in the mobilised dilation angle, as demonstrated by Rencher et al. (1993) and Papaliangas et al. (1994). This explains why flat surfaces or saw-toothed joints of different size of teeth have no scale...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 96, September 2–5, 1996
Paper Number: ISRM-EUROCK-1996-035
... Characterization average value in-situ investigation loading plate bearing test Upstream Oil & Gas geomechanical investigation different-scale deformation study flat jack scale effect Deformation property moduli rock mass reservoir geomechanics scale factor pressuremeter test relationshi ps...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 96, September 2–5, 1996
Paper Number: ISRM-EUROCK-1996-056
... by the ISRM (International Society for Rock Mechanics) in 1988, that specifies the use of cylinders obtained from core sections in which special V shaped notches are cut. Specimens of different diameters (80, 50,33 mm) were used to study scale effects. It proved impossible to go below 33 mm on account...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 93, June 21–24, 1993
Paper Number: ISRM-EUROCK-1993-066
... Reservoir Characterization displacement shear shear direction asperity Upstream Oil & Gas Frictional Resistance normal load discontinuity strength Barton rock joint backward shear shear strength scale effect resistance shear stress friction angle shear stiffness forward...

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