...) for the different families observed with the stereographic projection. discontinuity ec7 stereographic projection eurocode 7 geologist reservoir geomechanics determination verification wedge europe government geological subdiscipline procedure orientation geology spain government stability...

.... To the best of our knowledge, studies that relate the effect of temperature (produced by a fire) on jointed rock masses are scarce. This paper considers the development of benchmark work for the determination of the basic friction angle on suitably prepared saw-cut planar granitic joints, some of them...

... igneous rock repository deterioration geologist geology europe government silicate disposal safety budapest elasticity geological subdiscipline specimen expansion determination histogram implication alteration result experimental investigation 15th ISRM Congress 2023 & 72nd...

... ABSTRACT: Conventional triaxial compression tests were conducted on dry cylindrical samples of three silicate and three carbonate rocks with porosities in the range 0.3%-24.0%, and confining pressures 0-70 MPa, in order to determine the constant m i of the Hoek-Brown criterion for intact rock...

... enough for automatic determination, especially when apertures are small. Thus, entire joint sets may remain unidentified (Herrero et al. 2022). upstream oil & gas discontinuity outcrop geologist europe government geological subdiscipline structural geology reservoir geomechanics...

... to the solutions involving the complex variable theory and conformal mapping. A possible solution procedure for the determination of these mapping coefficients based on an iterative process including the solution of linear systems of equations is presented. The proposed solution procedure can be utilized...

... results, with lower strength than those obtained by the indirect method. INTRODUCTION Obtaining the tensile strength of rocks in a precise and representative way has always attracted the interest of the scientific community. However, its determination has been compromised, as the direct tensile test...

... and dependability of empirical prediction models is based on the quality and quantity of the available field data. In general, it is challenging to gather large amounts of high quality data. To determine the mechanism of rock fragmentation by TBM disc cutters, various numerical modelling techniques have been used...

... ABSTRACT: Extension fractures that appear as very rough and irregular and with or without infill material, are common in thick-bedded and karstified limestones for which present-day methods for shear strength estimations are inappropriate. With the aim of determining the shear strength...

... of indirect testing of the compressive strength by point load testing, where the Point Load Index, Is (50) , is a fraction of the strength value from UCS testing. However, the scatter of the results from the indirect determination of strength advocates more direct testing, i.e. UCS testing...

... detectable parameter that can be applied for prediction of the mode I FT. In this contribution, the results of investigations of mutual empirical relationships between FT determined using CB and SCB tests, as well as among FT values obtained via these testing methods and BTS are presented. A total of 14...

... procedure both influence the test results. Swelling pressures can be determined by confined swelling tests. However, for incremental loading and unloading tests, often called Huder-Amberg tests, the procedure to determine swelling pressures are not well defined and the authors noted large deviations...

... ABSTRACT: The standard method for determining the set of five independent elastic constants of transversely isotropic rocks relies on the conduction of at least three UCS tests with directional radial strain measurements on samples with varying isotropy plane orientation. However, in many...

... coalescence (Diederichs & Martin, 2010). CI and CD stress can be determined using several methods and testing procedures, such as the axial/lateral strain method (Lajtai, 1974), volumetric strain method (Brace et al., 1966), crack volumetric strain method (Martin & Chandler, 1994), moving point...

... specimens, with height-to-diameter (H/D) ratio of 2.5 to 3.0 for direct tensile strength (DTS) determination, in a similar way as per UCS testing. Nevertheless, it is unclear how this ratio may affect the tensile strength of a rock when directly determined. In the present work, the authors performed some...

... cohesion weaker matrix physical shear apparatus apparatus matrix interface shear strength university ss shear strength determination faculty 15thISRM Congress 2023&72nd Geomechanics Colloquium. Schubert & Kluckner (eds.) © ÖGG Physical modelling of bimrocks in large scale direct shear...

... Abstract Assigning the shear strength of discontinuities in rock masses should consider, in addition to their basic properties such as roughness, filling or continuity; the scale of the problem under study and risk associated with the determination of this parameter. In this paper...

... strength. Thus, three tests were performed for this correlation: the point load test, the Schmidt hammer hardness test, and the sonic velocity test. A characterization of physical parameters of these rocks, through the determination of the dry density, porosity and water absorption was also performed...

... Abstract In the current paper, several alternative and improved experimental methods to determine rock mechanical parameters are presented. Established procedures to define the stressstrain characteristics for compressive loading and the associated damage in the post-failure region...

... Abstract The strain gauge probes of different construction are typically used for determination of stress state of rock mass. The modified overcoring method with the original name Compact Conical ended Borehole Overcoring method (CCBO) for rock mass stress measurement is now commonly used...