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Keywords: crystalline rock
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Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-292
... ABSTRACT: A grain-based model (GBM) for modeling crystalline rocks has been developed based on the discrete element method (DEM), in which the rock structure is tessellated using the Voronoi algorithm. In this study, an extended grain-based model (EGBM) is proposed by introducing discrete...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-256
... ABSTRACT: Various in-situ hydraulic fracturing experiments were carried out in the naturally fractured, crystalline rock mass of the Grimsel Test Site (GTS) in Switzerland. The purpose was to study the geometry of the newly created fractures and their interaction with the preexisting fracture...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1104
... it possible to quantitatively compare hydraulic properties of the different excavation methods. Diamond wire cutting, as expected, greatly reduces the EDZ permeability compared to blasting. reservoir geomechanics hydraulic property structural geology crystalline rock borehole Completion...
Proceedings Papers

Paper presented at the 48th U.S. Rock Mechanics/Geomechanics Symposium, June 1–4, 2014
Paper Number: ARMA-2014-7345
... Abstract The crack damage progression in crystalline rocks is approximated in laboratory by means of rigorous strain measurement and/or monitoring of Acoustic Emission (AE) activity. When both means are used, they are treated independently for quantification of damage in the rock. This paper...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-194
... Abstract: In analyzing intact rock strength, an important factor is heterogeneity. At the grain-scale, intact crystalline rock consists of a variety of mineral grains of different sizes and shapes. These features give rise to the micro-scale heterogeneity. A three dimensional Grain Based...
Proceedings Papers

Paper presented at the The 42nd U.S. Rock Mechanics Symposium (USRMS), June 29–July 2, 2008
Paper Number: ARMA-08-105
.... In rock engineering applications, rock physical interpretation of geophysical data has also become more important to obtain mechanical and hydrogeological subsurface models. In those applications, not only sedimentary rocks but also volcanic and crystalline rocks must be characterized and modeled...
Proceedings Papers

Paper presented at the DC Rocks 2001, The 38th U.S. Symposium on Rock Mechanics (USRMS), July 7–10, 2001
Paper Number: ARMA-01-1259
... ABSTRACT : We compare compressive failure in crystalline rocks with that in a newly tested hornfels from the Long Valley Exploratory Well, California. Strength characteristics, deformation behavior, and micromechanics of failure observed in the nearly isotropic, very-fine-grained hornfels...
Proceedings Papers

Paper presented at the The 31st U.S. Symposium on Rock Mechanics (USRMS), June 18–20, 1990
Paper Number: ARMA-90-0841
..., Stanford, Calif. ABSTRACT: Data from the Cajon Pass (USA), KTB (West Germany), and Kola (USSR) scientific drillholes suggest hat intrinsic slrength anisolropy of crystalline rocks may be a major factor affecting wellbore breakout-derived orientation and magnitude of in situ slresses. Intrinsic slrength...
Proceedings Papers

Paper presented at the The 27th U.S. Symposium on Rock Mechanics (USRMS), June 23–25, 1986
Paper Number: ARMA-86-0910
...Coptr 131 A NOVEL OPERATING PRINCIPLE FOR A NUCLEAR WASTE REPOSITORY IN CRYSTALLINE ROCK B.H.G. Brady, B.E. Hobbs, L. Paterson, H.P. Schlanger CSIRO, Division of Geomechanics, Melbourne, Australia Abstract. A novel principle for a waste repository, based on a backfilled thermosyphon...
Proceedings Papers

Paper presented at the 20th U.S. Symposium on Rock Mechanics (USRMS), June 4–6, 1979
Paper Number: ARMA-79-0035
..., and a strain rate of 10-4/s. The strength reductions of the crystalline rocks are more or less linear until they steepen sud- denly with approach to melting. When that occurs, strengths vanish and deformations become quasiviscous. The obsidian is stronger than the crystalline rocks tO-6 OøC where glass...
Proceedings Papers

Paper presented at the The 18th U.S. Symposium on Rock Mechanics (USRMS), June 22–24, 1977
Paper Number: ARMA-77-0009
...AN ANALYSIS OF DEEP BOREHOLES IN HOT, DRY, CRYSTALLINE ROCK By C. M. St. John, Assistant Professor Department of Civil and Mineral Engineering University of Minnesota Mi nneapol i s, Minnesota ABSTRACT The geothermal energy program has resulted in an increased interest in the deformation...
Proceedings Papers

Paper presented at the The 8th U.S. Symposium on Rock Mechanics (USRMS), September 15–17, 1966
Paper Number: ARMA-66-0058
... and minerals at high pressure, and 4) the law of effective stress for crystalline rocks. Our objective here is less to present an entirely consistent, coml lete picture of how a rock fractures than it is to emphasize gaps in our under- standing and, thus, suggest areas that need further study. Progress...

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