.... At the laboratory scale, the elastic symmetry can be represented by the transverse isotropy, with the lowest elastic modulus perpendicular to the plane of aligned microcracks. These issues are discussed with reference to experimental data obtained for two gneisses of the same geological formation. The gneisses show...

... joint roughness. europe government environmental science 833 photograph geologist artificial intelligence roughness geology coefficient theory photogrammetry rock engineering practice iop publishing iop conf jrc coefficient applicability orientation template rock mech plane...

... length plays a role in different parameters used to describe rock mass behavior in a quantitative way. The first and most common one is persistence. In 1978, the ISRM commission [1] defined persistence as the areal extent or size of a discontinuity within a plane. Persistence can be crudely quantified...

... characterization melange practice iop publishing iop conf matrix geomaterial strength health & medicine geological subdiscipline environmental science 833 theory upstream oil & gas rock type reservoir geomechanics rock engineering melange specimen plane heterogeneous specimen weakness...

... rock engineering theory geological subdiscipline stability strength excavation plane exploitation metals & mining practice iop publishing iop conf backfill quarry displacement Mechanics and Rock Engineering, from Theory to Practice IOP Publishing IOP Conf. Series: Earth...

... and variable parameters, among others water pressure and earthquake activities were considered. Different scenarios from the best to the worst-case were analysed and later compared. The sensitivity analysis revealed the importance of the joint failure plane, joint roughness coefficient and joint friction angle...

... gouges as intact rock, and (ii) considering the fault gouge as tectonised rockmass. Both working hypotheses are consistent, reaching maximum values of resistance when axial load (σ 1 ) is applied perpendicular to the foliated planes of the gouge, decreasing for lower angles with the anisotropy planes...

... and solutions (TBM, Mechanical and D&B) in sedimentary rocks. reservoir characterization upstream oil & gas support design structural geology rockmass metals & mining strength weakness plane rock strength reservoir geomechanics rock mechanics bedding sandstone stability tunnel...

... strength: the angle enclosed by the plane of the sample surface and the shear plane, in the direction of shear. 3D surface roughness measurements were carried out on 18 Opalinus Claystone sample (Switzerland) and 6 on granitic rock sample (Hungary) surfaces. An interval of angle was analyzed...

... the actual occurrence of instability toppling phenomena in rock slopes. 1.1. Brief description of the quarry and mined stone Artificial Intelligence Alejano weakness plane procedia engineering 191 metals & mining orientation quarry representation Reservoir Characterization hardway...

... discontinuities, like bedding planes, joints or cracks, represent the weak zones, which separate singular polyhedrons of competent rock blocks and control failure mechanisms. Furthermore, discontinuities influence the mechanical properties and the behavior of rock masses. Geotechnical engineers traditionally...

.... In this paper we consider transverse crack formation on borehole wall in a given plane when the fracture initiation occurs due to an indenter impression located between two inflatable packers. During indentation fracturing, fluid under high pressure is supplied and this contributes to crack propagation...

... of the internal fabric of rocks is mostly disturbed by the presence of planes of weakness, such as discontinuities, microstructures or any mechanical fractures. Besides, the internal fabric of the rock in many cases presents a predisposition to mechanical anisotropy [1]. Metamorphic rocks were subject to extreme...

... clouds detecting the number of discontinuity sets, classifying each point with its discontinuity set and plane equation and calculating their normal spacing; and SMRTool calculates the geo-mechanical quality of a rock slope by means of the Slope Mass Rating (SMR) index. In order to illustrate the use...

... network and are prone to human bias. To increase the reliability of discontinuity models, digital mapping techniques using data from remote sensing, like Close-Range Terrestrial Digital Photogrammetry, were developed. This paper focuses on the plane identification within 3-D point clouds using MATLAB®...

... and the variation of rock conditions in the foundation, the major design unknowns were the spatial distribution of deformability and joints shear strength in the area of interest; for the latter it was determined that the bedding planes must be studied in detail because their geometrical situation and continuity...

... ABSTRACT: Granite is well known as an anisotropic rock. It usually has three planes normal to each other being called the rift, grain and hardway, and these planes have different physical properties and strengths. In this study, Pocheon granite in Korean was selected to investigate its elastic...

... of this study is to concentrate on the effects of planes of weakness, such as joints and bedding planes. A constitutive model is presented for this class of materials and series of finite element analysis are used for the evaluation of bearing capacity. To validate the applicability of the proposed model...

... that potential mechanism both of wedge failure and plane failure could occur. In Figure 7a it is possible to observe that the inter- section points of the three families of discontinuities, falls back in the critical zone. Figure 7b describes the probability of kinematic mechanism occurrence for planar...

... modes of rock slope failures (plane, wedge, toppling failures), which occur due to the presence of unfavorably oriented disconti- nuities. Structurally-controlled instability means that blocks formed by discontinuities may be free to either fall or slide from the excavation periphery under a set...