... Abstract The basic friction angle is a basic parameter used in the shear strength estimation of discontinuities. The accurate determination of the shear strength of the discontinuities is of great importance for engineering structures built on or inside the rock. In this study; the variation...

... Abstract The contribution from both surface roughness and matedness in the peak shear strength of rock joints is not yet well understood. To be able to account for the influence of matedness on the peak shear strength of rock joints, both surface roughness and aperture need to be considered...

... Abstract The scale effect is known to hinder reliable shear strength estimation of large-scale discontinuities. Recently, a stochastic approach was proposed to predict shear strength of large discontinuities directly at problem scale, thereby bypassing the scale effect. One aspect...

... Abstract The basic friction angle of rock joints is usually obtained from tilt tests, being the most common the laboratory tilt tests. This test has been standardized according to the ISRM. However, most of the times when calculating the shear strength of discontinuities, reference tables...

... specimen shear displacement reservoir characterization theory experiment environmental science 833 replica parametrisation displacement shear strength repository knowledge management practice iop publishing iop conf rock engineering fracture geometry Mechanics and Rock Engineering, from...

...-directional) shearing b) Two-ways (bi-directional) shearing. Another approach is to utilize shock loads [13-17]. Huang et al. [13] suggested a punch shear device to measure the dynamic shear strength of brittle solids. In this method, a split Hopkinson pressure bar system (SHPB) is used to apply the dynamic...

...-mentioned reasons, partial factor approach seems not to be well suited to rock engineering. structural geology south africa government plate tectonics drilling operation management stability shear strength discontinuity practice iop publishing iop conf johannesburg theory geologist rock...

... 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 Mechanics, KTH Royal...

... 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...

... for 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...

... are 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...

... in 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...

... 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...

... 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 joint surface...

... 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 strength...

... 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...

... 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...

... 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 matched...

... displacement particle current limitation shear test Upstream Oil & Gas strength smooth joint contact smooth joint segment Reservoir Characterization roughness rock joint asperity stiffness shear displacement laboratory contact model ball 1600 peak shear strength shear...

... with the percentage of Sulphuric Anhydrite and also up to some extent it is inversely proportional to the per- centage 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...