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1-20 of 1022
Keywords: strength
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Proceedings Papers
Geotechnical Parameters Prediction from Geophysical Logging Data Using Supervised Learning Methods
Available to Purchase
Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-158-C
... dataset accuracy progression geologist artificial intelligence percussion drilling neural network rotary percussion drilling strength neighbor drilling geotechnical information node rotary percussive drilling 15th ISRM Congress 2023 & 72nd Geomechanics Colloquium. Schubert & Kluckner (eds...
Proceedings Papers
Instability Phenomena Affecting the Cultural Heritage Cave of Antro Della Sibilla (Cuma, Italy)
Available to PurchaseDaniele Spizzichino, Paolo Maria Guarino, Gabriele Leoni, Milena Diletto, Edoardo Lusini, Fabio Pagano, Marida Salvadori, Daniela Boldini
Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-164
... oil & gas reservoir geomechanics volcanology europe government geological subdiscipline strength geologist italy government sibilla antro geology reservoir characterization antro della sibilla university bologna cuma neapolitan yellow tuff cavity figure specimen strength...
Proceedings Papers
Effect of Shape on the Survival Probability of Rock Replicas During Free Fall Tests
Available to Purchase
Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-173
... fragmentation engineering effect survival probability variability significance rock mechanic asia government replica figure 3 mortar replica magnitude priority research centre collinear geometrical variability strength 15th ISRM Congress 2023 & 72nd Geomechanics Colloquium. Schubert & Kluckner...
Proceedings Papers
A Possible Way Forward to Predict the Peak Shear Strength of a Natural, Unfilled Rock Joint Under Concrete Dams Based on Field Data
Available to Purchase
Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-198
... ABSTRACT: The prediction of a rock joint's peak shear strength becomes complex when its joint surfaces are not fully accessible, such as the rock foundation under an existing concrete dam. This paper presents a case study with the application of a newly developed methodology that uses...
Proceedings Papers
Applications of the Structure from Motion Photogrammetric Technique to Solve Geotechnical Problems at Different Scales
Available to Purchase
Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-158-D
... strength information 15th ISRM Congress 2023 & 72nd Geomechanics Colloquium. Schubert & Kluckner (eds.) © ÖGG Applications of the Structure from Motion photogrammetric technique to solve geotechnical problems at different scales Ramiro García-Luna E.T.S.I. de Caminos, Canales y Puertos, Universidad...
Proceedings Papers
Interpreting Variability of Uniaxial Compressive Strength with Insights from Vein Microstructures
Available to Purchase
Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-158
... ABSTRACT: The uniaxial compressive strength (UCS) test is regularly used to derive rockmass strength and stiffness properties for geomechanics numerical modelling. While the test is straightforward, selecting representative material properties from a testing suite constrained by economics...
Proceedings Papers
Effects of Water on the Time Dependent Properties of Rock
Available to Purchase
Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-211
... of strength and the stress dependence of creep lifetime in dry and wet conditions was examined on the basis of the previous experimental results of a tuff. It was found that the results of strength and short-term creep tests in dry and wet conditions are consistently explained with the rate process theory...
Proceedings Papers
Rehabilitation of Old Masonry Tunnels – Challenges and Possibilities
Available to Purchase
Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-210
... with a self-supporting reinforced concrete inner shell. The low clearance profile required partial removal of the masonry. Due to the vibration-sensitive structure and high rock strength, the milling work had to be carried out on the basis of a separate safety concept including high-pressure water cutting...
Proceedings Papers
Crush Pillars' Behaviour at Intermediate Depth on Merensky Reef
Available to Purchase
Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-222
... that they crush as they are being cut, with the residual strength of the pillar material being used for the design. However, the major challenge is to "cut" or mine these pillars to the designed size. Undersized pillars degrade and do not provide the required stability, whilst pillar bursts may occur from...
Proceedings Papers
Long Term Behaviour Based on a Weakness Planes Approach: Constitutive Model and Application to a Meuse/Haute-Marne (France) URL Drift
Available to Purchase
Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-208
... among others (Armand et al. 2014, see Figure 1 for example). Several factors contribute to this anisotropic response: anisotropy of the rock fabric (stiffness, strength), anisotropic in situ stress state, induced pore pressure field, induced quasi-brittle failure, etc. Over the last 20 years, many...
Proceedings Papers
Design of Underground Structures and Support Systems for Extraction of Inclined Coal Seam
Available to Purchase
Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-219
... ABSTRACT: Strata control problems are observed more in dipping coal seams than flat coal seams due to shearing effects, asymmetric failure and stress distribution in inclined rock strata. As most of the pillar strength formulae are derived for the conditions of flat coal pillars...
Proceedings Papers
Time-Dependency and Long-Term Strength of Rocks in Brittle Underground Environments – From the Lab Results to Numerical Continuum Analysis
Available to Purchase
Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-220
... (Paraskevopoulou, 2021). Consequently, the primary aim of this paper is to give more insight into how brittle rock types perform over time in underground conditions. geologist europe government tensile strength figure 4 representation mechanism united kingdom government strength diederich...
Proceedings Papers
Slope Support Analysis at Jwaneng Mine
Available to Purchase
Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-283
... government metals & mining reservoir characterization geologist botswana government native element mineral mudstone geogrid itasca consulting group shale bedding plane displacement bench 17 strength minneapolis reinforcement cable anchor cross-section design acceptance criteria...
Proceedings Papers
Full-Scale Pullout Tests of Rock Anchors in Limestone Testing the Interfacial Bond Strengths
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Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-255
... the mechanical properties of the ground (Hobst and Zajíc, 1983). The appropriate application of rock anchors demands knowledge and understanding of the behaviour of the anchors, this includes their failure modes, strengths, load, displacement, and steel relaxation characteristics (Brown, 2015). In principle...
Proceedings Papers
Influence of Rock Crystal Structure on Bond Strength at the Rock-Shotcrete Interface
Available to Purchase
Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-263
... ABSTRACT: The bond strength at the aggregate-cement paste interface is affected by the microstructure of the interfacial transition zone (ITZ). However, the influence of substrate crystal structure on the rock-shotcrete interface behaviour has received limited attention. This study...
Proceedings Papers
Modelling Brittle Rock Mass Behaviour in Deep Underground Excavations
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Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-284
... 2001 and Diederichs 2007). geology europe government united states government reservoir geomechanics canada government tunnel upstream oil & gas excavation geological subdiscipline lac du bonnet granite geotech continuum localization hoek-brown university rock mech strength...
Proceedings Papers
Compression Test of TBM Thrust Jack for Validation of Bucking Strength Under Inclined Loading Condition
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Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-249
... of the segments because the helical segment has a pitch angle (Figure 1). The inclined contact can induce the side force and bending moment of the hydraulic cylinder, which can arouse oil leak or plastic deformation of rod and cylinder parts. To guarantee the buckling strength of cylinder and seals parts...
Proceedings Papers
The Shear Behavior of the Rock-Concrete Interface with Different Angles: A DEM Simulation
Available to Purchase
Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-276
... ABSTRACT: During the whole life of a tunnel lining, the concrete-rock interface is one of the weak areas. To study the shear strength of concrete-surrounding rock interfaces, a direct shear test with a flat interface was carried out. The mechanical properties of contact surfaces with different...
Proceedings Papers
Experimental Investigations of Instrumented Fully Grouted Rock Bolts Under Pull Load
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Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-265
... load-deformation relationship curves for different hole diameters of pulling to observe the variation in peak bond strength and stiffness. The tensile strains obtained at four locations are validated with an analytical equation are in the paper. INTRODUCTION Rock bolt is the key reinforcement...
Proceedings Papers
Kinematic Simulation of Rock Cutting Performance of a 130t Roadheader in Korea
Available to Purchase
Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-297
.... The study modelled the cutting head of 130 ton Roadheader and rock surfaces cut by it. The contacts between pick cutters and rock were defined by a kinematic software. A series of cutting operations (i.e., sumping and shearing processes) was simulated. Four classes of rock strength were considered as rock...
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