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Keywords: strength
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Proceedings Papers

Paper presented at the 1st Canada - U.S. Rock Mechanics Symposium, May 27–31, 2007
Paper Number: ARMA-07-030
... ABSTRACT ABSTRACT: Although tensile strength can often be neglected for weak or highly jointed rock masses, the strength of rock bridges in moderately fractured and blocky hard rock masses contributes significantly to their self-supporting capacity and should be considered in engineering...
Proceedings Papers

Paper presented at the 1st Canada - U.S. Rock Mechanics Symposium, May 27–31, 2007
Paper Number: ARMA-07-035
... ABSTRACT ABSTRACT: The application of Geological Strength Index (GSI) to Japanese rocks is discussed. There have been very few attempts at using the GSI in Japan. First, we tried to compare GSI to the Japanese conventional classification for NATM tunneling. The support requirement...
Proceedings Papers

Paper presented at the 1st Canada - U.S. Rock Mechanics Symposium, May 27–31, 2007
Paper Number: ARMA-07-065
... mechanical properties, virtual rock samples were modeled and virtual drilling and cutting tests were performed. structural geology strength shear failure fracture pattern drilling process compressive strength Upstream Oil & Gas rock material rock sample dip angle fragmentation disc...
Proceedings Papers

Paper presented at the 1st Canada - U.S. Rock Mechanics Symposium, May 27–31, 2007
Paper Number: ARMA-07-100
... degrees of cementation the peak strength is closely correlated with the Young’s modulus. There seems to be a strong correlation between porosity and strength. This correlation was further improved by taking into account the primary layering. Sonic travel times also correlate with the peak strength and can...
Proceedings Papers

Paper presented at the 1st Canada - U.S. Rock Mechanics Symposium, May 27–31, 2007
Paper Number: ARMA-07-025
... ABSTRACT ABSTRACT: This paper introduces a new in-situ technique for characterizing rock mass mechanical strength and the associated spatial distribution in the ground. The technique involves automatic drilling process monitoring (DPM). Case examples are given to show the original DPM data...
Proceedings Papers

Paper presented at the 1st Canada - U.S. Rock Mechanics Symposium, May 27–31, 2007
Paper Number: ARMA-07-060
... known that the creation of an underground excavation disturbs the stress field. When the stress magnitudes on the boundary of the excavation exceed the rock mass strength yielding occurs and an excavation damage zone (EDZ) can be readily observed (Martin et al. 1997). However, in many situations...
Proceedings Papers

Paper presented at the 1st Canada - U.S. Rock Mechanics Symposium, May 27–31, 2007
Paper Number: ARMA-07-031
... ABSTRACT ABSTRACT: The GSI system for rockmass strength estimation based on the Hoek-Brown criterion has become the industry standard for international tunnelling and is becoming popular in slope applications. This system is based on the principle that structure within a rockmass (joints...
Proceedings Papers

Paper presented at the 1st Canada - U.S. Rock Mechanics Symposium, May 27–31, 2007
Paper Number: ARMA-07-081
... A number of different scales (micro, meso and macro scale) of defects (flaws) exist in fractured rock masses. Under compressive stress, the initiation, propagation and interaction of micro to macro flaws will weaken the stiffness and strength of the rock mass. The failure of brittle materials...
Proceedings Papers

Paper presented at the 1st Canada - U.S. Rock Mechanics Symposium, May 27–31, 2007
Paper Number: ARMA-07-026
..., hardness, uniaxial compressive strength (UCS), joint spacing, joint filling (aperture) and joint dip, have been investigated by physical modelling and rated. In this system, for each rock mass a rating from 7 to 100 is assigned. A higher rating represents a good-quality rock mass from the view point...
Proceedings Papers

Paper presented at the 1st Canada - U.S. Rock Mechanics Symposium, May 27–31, 2007
Paper Number: ARMA-07-107
... may be described as an active wedge and the support must be designed to stabilize this wedge. Upstream Oil & Gas Piezometer rock cut reservoir geomechanics strength cohesion air transportation displacement site investigation sequence investigation rock excavation Reservoir...
Proceedings Papers

Paper presented at the 1st Canada - U.S. Rock Mechanics Symposium, May 27–31, 2007
Paper Number: ARMA-07-097
... to estimate the strength of rock media at different scales. These include a scaling function proposed by the authors, which is partly based on the statistical variability of uniaxial compressive strength of intact rock samples. In this paper, this approach is revisited. A simple method is presented...
Proceedings Papers

Paper presented at the 1st Canada - U.S. Rock Mechanics Symposium, May 27–31, 2007
Paper Number: ARMA-07-032
... ABSTRACT ABSTRACT: Knowledge of the rock mass strength is required for the design of many engineering structures in or on rocks. GSI system, proposed by Hoek et al. (1995), is now widely used for the estimation of the rock mass peak strength and the rock mass deformation parameters...
Proceedings Papers

Paper presented at the 1st Canada - U.S. Rock Mechanics Symposium, May 27–31, 2007
Paper Number: ARMA-07-076
... (or in-plane shearing mode) and Mode III (or out-of-plane shearing mode). reservoir geomechanics strength Loading Rate experimental result Upstream Oil & Gas flagstaff sandstone short beam compression test hydraulic fracturing microcrack specimen Reservoir Characterization intensity...
Proceedings Papers

Paper presented at the 1st Canada - U.S. Rock Mechanics Symposium, May 27–31, 2007
Paper Number: ARMA-07-047
... that the rate of deformation influences the peak strength, volume variation and post-peak behaviour of kink bands. The model’s peak strength is influenced by the rate of deformation. An increase of the deformation rate leads to an increase up to five times the peak strength. Slow rates show a consistent...
Proceedings Papers

Paper presented at the 1st Canada - U.S. Rock Mechanics Symposium, May 27–31, 2007
Paper Number: ARMA-07-042
... at a case study block cave mine (Reyes-Montes et al. 2007). 1 INTRODUCTION Although long recognized as a central concern of rock mechanics, progress in estimating the strength and brittleness of rock masses has been slow, with reliance placed on empirical classification rules and systems derived from...
Proceedings Papers

Paper presented at the 1st Canada - U.S. Rock Mechanics Symposium, May 27–31, 2007
Paper Number: ARMA-07-062
... ABSTRACT ABSTRACT: A modelling approach for rock slopes is proposed that is based on discrete element formulation. This model allows damage to occur and propagate within intact rock blocks and along discontinuous joint sets. The model uses traditional shear strength failure criteria...
Proceedings Papers

Paper presented at the 1st Canada - U.S. Rock Mechanics Symposium, May 27–31, 2007
Paper Number: ARMA-07-102
... ABSTRACT ABSTRACT: The engineering and mechanical properties of macroporous rock are highly variable and exhibit considerable scatter when unconfined compressive strength or deformation modulus are plotted as functions of macroporosity. One approach to such describe such highly scattered...
Proceedings Papers

Paper presented at the 1st Canada - U.S. Rock Mechanics Symposium, May 27–31, 2007
Paper Number: ARMA-07-017
... with data capture functionality. Artificial Intelligence data model business rule information management workflow relational database data quality drillhole strength Microsoft access geotechnical data management database metals & mining Upstream Oil & Gas geotechnical parameter...
Proceedings Papers

Paper presented at the 1st Canada - U.S. Rock Mechanics Symposium, May 27–31, 2007
Paper Number: ARMA-07-098
... ABSTRACT ABSTRACT: The influence of sample end effects on the unconfined compressive strength of rock core is well recognised. ASTM standards exist to ensure that minimum standards of sample smoothness are maintained to minimise the influence of friction between the samples ends and loading...
Proceedings Papers

Paper presented at the 1st Canada - U.S. Rock Mechanics Symposium, May 27–31, 2007
Paper Number: ARMA-07-108
... slopes with similar geologic characteristics are provided. The paper provides a comparison of these different techniques utilizing a sensitivity analysis of a typical dip slope geometry, focusing on limit equilibrium (LEM) and discrete element (DEM) modeling. knowledge management strength slope...

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