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Keywords: shear strength
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Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2020, June 14–19, 2020
Paper Number: ISRM-EUROCK-2020-002
... failure mode that needs to be addressed. However, the parameters governing the shear strength of this failure mode are associated with large uncertainties and are difficult to assess due to the existing dam. This keynote paper presents a summary of the work performed at the Division of Soil and Rock...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-128
... Abstract Shear strength along rock discontinuities by means of direct shear strength tests were performed on granitic and clayey rocks. Both rock types represent potential host rocks of radioactive waste. The paper focuses on the effect of one parameter in particular influencing the shear...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-048
... joints roughness assessment, without the need for expensive and time consuming laboratory tests or subjective empirical methods. In this study, a new photogrammetric method was used to estimate the roughness, shear strength and friction angle of a discontinuity of 2 m by 1 m fresh rock joint. The...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-084
... thawing, resulting in a significant shear strength reduction. In this review, we will discuss the various existing design methods in the context of the phenomena involved in the formation of frozen rock and the behaviour of thawing rock. We will show the deficiencies of these methods and highlight...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-147
... total shear strength of the cable bolt. 1. Introduction Mining in Australia is one of the safest industries but there are still some fatal accidents. The number of deaths was 10, 13 and 13 in 2013, 2014 and 2015 respectively [1]. The current emphasis is to towards zero fatality Therefore, one of the...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-148
... Abstract An experimental study was carried out on grout samples prepared from both Stratabinder and BU100 cementitious products. Samples were prepared with various water to grout ratios and tested for uniaxial compressive and shear strength. Triaxial tests were performed on cylindrical samples...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-055
... currently under execution, the model will become more accurate and quantitative (especially the roughness profiling). 1 INTRODUCTION Over many years, fine sediments resulting from weathering and other surface processes could subsequently ingress to rock joints, reducing the overall shear strength of the...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-129
.... hydraulic fracturing anisotropic slate cleavage shear strength Upstream Oil & Gas Bochum specimen hydraulic fracture ruhr-university bochum schistosity Reservoir Characterization orientation slate engineering geology rock engineering triaxial strength reservoir geomechanics perpendicular...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-182
... Abstract Some rock engineering designs are based on the Barton shear strength criterion for rock joints. One of the more relevant input parameters of this criterion is the basic friction angle. Nevertheless, no method is suggested to determine this value. Initially, the basic friction angle...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-073
... Abstract This study deals with the comparison of the results of shear tests conducted under conditions of constant normal load (CNL) and constant normal stiffness (CNS). The aim was to investigate whether the shear strength results of the two test procedures are comparable and whether the...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-078
... asperity shear strength is more important, according to models of Patton and Barton (the most important classical limit equilibrium models of forces) the participation of the asperity shear strength is lower, vanishing hyperbolically with increasing σ n (Leal-Gomes & Dinis-da-Gama 2014a). At least in...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-101
... Abstract Shear strength of rock joints decreases dramatically, possibly to the residual value, with increasing degree of opening. Compared to the closed joint, the asperity contact area of the opened joints is smaller; shearthrough happens more easily and dilatancy is less remarkable. This...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-086
... determine the shear strength for discontinuity and for rock mass respectively. The finite difference program FLAC 6.0 has been used to validate the model. Results show in a sensitivity analysis executed, that it is possible to define with acceptable accuracy a sliding safety factor for the mechanism...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-124
... Abstract Rock mechanical problems are often governed by the shear strength of joints, but assessing it theoretically is difficult because of the many underlying factors. Consequently, expensive and time-consuming shear tests must be performed either in laboratory or in situ. Artificial shear...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-165
... extent it is inversely proportional to the percentage of Chloride. For resin capsule it has been established that both the compressive strength as well as the shear strength is inversely proportional to the percentage of filler material present in the resin capsule. In case of fast setting resin capsule...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-167
... shear strength requirement dosage compressive strength resistance load resistance early age strength MPa underground-cast cylinder Rock Engineering and Rock Mechanics: Structures in and on Rock Masses Alejano, Perucho, Olalla & Jiménez (Eds) © 2014 Taylor & Francis Group, London, 978-1-138...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-236
... geomechanics strength specimen compressive strength flow in porous media failure characteristic water retention characteristic clay shale tensile strength mpa total suction shear strength stiffness Reservoir Characterization Fluid Dynamics water content suction relative humidity onset total...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-022
... parameters. Due to unavailability of reliable and realistic results or models and the difficulties in laboratory testing of representative samples, engineers generally rely on judgment, often considering the shear strength of the infill itself as shear strength of rock joints. This assumption not only leads...
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 and...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-028
... one of the most relevant topics of research in rock mechanics. Barton and co-workers (Barton 1973, 1976, Barton & Choubey 1977, Barton & Bandis 1980) developed a procedure to estimate the shear strength τ of these joints starting from the basic friction angle of a planar rock joint φ b , a...

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