... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... (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...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

.... 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...