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Keywords: rotation
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Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-188
... trajectory algorithm axis mining science apparatus rock mechanic international journal calculation tracking fragment rotation resolution fragmentation frag 50 fragment trajectory viewpoint development giacomini Abstract In this paper, an apparatus to track rock fragment...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-457
... reservoir characterization glover development rotation interaction switzerland rock-net interaction norrish rock engineer attenuator sensor figure experiment duffy upstream oil & gas rockfall mesh rockfall attenuator deceleration rockfall protection rockfall trajectory...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-418
... Abstract Practical case studies show that current design procedures of rockfall nets do not consider all possible impact processes in natural terrain. Barriers fail because of a high component of rotational speed of the impacting blocks or hits to corner or end fields of the barrier section...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-050
... deformation rotation chlorite schist stability metals & mining planar rupture crenulation cleavage importance rupture mechanism Rock Mechanics for Natural Resources and Infrastructure Development Fontoura, Rocca & Pavón Mendoza (Eds) © 2020 ISRM, ISBN 978-0-367-42284-4 Importance...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-122
... fractal dimension dimension roughness upstream oil & gas reservoir characterization fracture strength journal chinese academy reservoir geomechanics granodiorite mechanism electron microscopy apparatus rock mechanic hydraulic fracturing particle rotation morphology science...
Proceedings Papers

Paper presented at the 13th ISRM International Congress of Rock Mechanics, May 10–13, 2015
Paper Number: ISRM-13CONGRESS-2015-320
... of pure rotations of arbitrary finite polyhedral blocks. It enables the engineer to judge a block's rotatability about a corner or an edge. The method is presented using a graphical and computational method. The application of the method is illustrated with an example. Introduction The kinematic...
Proceedings Papers

Paper presented at the 12th ISRM Congress, October 16–21, 2011
Paper Number: ISRM-12CONGRESS-2011-023
... ABSTRACT A new mechanism of blocky rock mass collapse is proposed based on the notion that even incipient rotation of a block can create an effect of local negative shear stiffness. This is a geometrical effect that affects moment equilibrium under the combined action of shear and normal...
Proceedings Papers

Paper presented at the 12th ISRM Congress, October 16–21, 2011
Paper Number: ISRM-12CONGRESS-2011-059
... moving in translation and rotation. Any block geometry with multiple faces can be studied by partitioning the polygonal faces into simple elements. Finally, an application on a real case example and comparisons with other methods show the advantages of the new developed method and the effect...
Proceedings Papers

Paper presented at the 12th ISRM Congress, October 16–21, 2011
Paper Number: ISRM-12CONGRESS-2011-001
... Upstream Oil & Gas Reservoir Characterization aperture reservoir geomechanics Rock mechanics application rock engineering Barton block size shear strength strength rotation Bandis tunnel deformation Artificial Intelligence Müller empiricism rock mass Magnitude Müller...
Proceedings Papers

Paper presented at the 11th ISRM Congress, July 9–13, 2007
Paper Number: ISRM-11CONGRESS-2007-056
... complex reservoir strength frequency Kulatilake fracture frequency rotation block size orientation data rock mass strength procedure reservoir geomechanics Upstream Oil & Gas borehole discontinuity rock mass stress analysis cube equivalent continuum material deformability fracture...
Proceedings Papers

Paper presented at the 11th ISRM Congress, July 9–13, 2007
Paper Number: ISRM-11CONGRESS-2007-038
... the principle of superposition holds. For large displacement field, there are two theories of mechanics, i.e., classical large deformation theory (see Truesdell and Noll, 1965; Biot, 1965; Guo, 1980), in which Green strain tensor is used as strain definition while rotation tensor is defined by Finger...
Proceedings Papers

Paper presented at the 10th ISRM Congress, September 8–12, 2003
Paper Number: ISRM-10CONGRESS-2003-181
... cylinder matrix elasticity matrix Engineering Purpose specimen orthotropic anisotropy forward analysis deformation Artificial Intelligence cylinder rotation practical method Amadei anisotropy hole deformation 1053 Shin, K., Practical Method for Measuring Anisotropy of Rock Using a Hollow...
Proceedings Papers

Paper presented at the 10th ISRM Congress, September 8–12, 2003
Paper Number: ISRM-10CONGRESS-2003-223
... in micro-fracturing (shear and tensile cracks), but not in macro-failure between various loading/ unloading schemes. The second set of experiments was based on the three-point bending test and several cycles with or without rotation between cycles were applied. If the specimen was rotated by 90° or 180...
Proceedings Papers

Paper presented at the 10th ISRM Congress, September 8–12, 2003
Paper Number: ISRM-10CONGRESS-2003-220
..., or else by rotation and sliding of the blocks. This last failure mode could also lead to very low model strength. ZUSAMMENFASSUNG Dieser Bericht beschreibt die Ergebnisse von Versuchen mit Modellfelsmassen um den Einflua von unterbrochenen Rissen in ihrer Widerstandsfahigkeit zu untersuchen. Es werden...
Proceedings Papers

Paper presented at the 9th ISRM Congress, August 25–28, 1999
Paper Number: ISRM-9CONGRESS-1999-107
..., H. KIYAMA & H. FUJIMURA, Tottori University, Japan i ABSTRACT: When a solid element is subjected to large deformations, the components of stress will vary as a result of material rotation. These changes need to be accounted for in formulating constitutive laws that involve the rate of change...
Proceedings Papers

Paper presented at the 9th ISRM Congress, August 25–28, 1999
Paper Number: ISRM-9CONGRESS-1999-156
... properties' of rock joints, In this paper, a new advanced shear-flow coupling test apparatus has been designed and produced to derive more shear-flow properties for a rock joint. From the result of the shear-flow tests to confirm the efficiency of this apparatus, the rotation of the upper box was perfectly...
Proceedings Papers

Paper presented at the 8th ISRM Congress, September 25–29, 1995
Paper Number: ISRM-8CONGRESS-1995-033
... Institute of Technology, Norway ABSTRACT: A map of the in-situ major horizontal principal stress direction on- and offshore Norway reveal a stress rotation from N-S in the Barents Sea to E-W in the North Sea. The stress rotation is primarily explained by the ridge push force and the continental margin...
Proceedings Papers

Paper presented at the 8th ISRM Congress, September 25–29, 1995
Paper Number: ISRM-8CONGRESS-1995-038
..., is defined as the hypothetical coordinate system. The direction of anticlockwise rotation is set as positive, and the coordinate system is defined as the coordinate system (f ,11 , 1:) rotated at an angle of t/> for Z-axis. Next, the coordinate system ( f , 11 , 1:) is z z y (a) Rotation around Z-axis (b...
Proceedings Papers

Paper presented at the 8th ISRM Congress, September 25–29, 1995
Paper Number: ISRM-8CONGRESS-1995-083
... slope wellbore integrity point 0 bolt contribution prediction Reservoir Characterization different value analytical model shear force shear strength expression bolt orientation relation maximum bolt contribution contribution rotation joint displacement A method for the design...

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