...-independent reliability approach encompassing the large variability of the size and the kinematics of the possible impacting blocks. The entire statistics of all these quantities (size, velocity, and height) enters into the calculations, differently from other approaches that consider specific values...

... Abstract Among the wide range of variables that influence the falling process of blocks during a rockfall event, the shape of the block often plays a crucial role. Spherical-like blocks typically reach longer runout distances while elongated and plate volumes stop earlier. Nevertheless...

... factor approach and the partial factor approach following the Eurocode 7 are first applied. A reliability-based design optimization procedure―which takes geometrical and mechanical properties of the discontinuities as random variables―is then used, and the results are compared to the former ones...

... by a constant. discontinuity rock engineering variability orientation hydraulic fracturing practice iop publishing iop conf theory configuration combination 0 italy government europe government std 0 comparison rock mech environmental science 833 distribution combination Mechanics...

..., dimensional and lithological variability. Such a variability, together with the presence of rock inclusions of different lithologies and dimensions, makes the collection of representative high-quality specimens for laboratory tests very challenging. As a consequence, the determination of the geomechanical...

... Abstract Campaigns to determine the state of in situ stress form an integral part of almost all underground rock engineering projects, but stress measurements obtained at different locations on a project site generally display spatial variability. However, there is no international consensus...

... modeling based on phenomenological description is briefly discussed. 1. Introduction 1.1. Triaxial experiment for study of mechanical behavior of rocks in variable stress conditions Investigation of mechanical behavior of rocks under applied external stress fields constitutes necessary base...

... be subsequently performed. This is put into context with a design example for the support of a rock wedge. 1. Introduction Rock engineering design customarily uses deterministic methods with factors of safety. However, this is inappropriate as these methods do not appropriately account for the variable...

... mechanics assessment characteristic point cloud Simulation discontinuity data gamma distribution generate input ferrero variability discontinuity rock engineering Rock Mechanics and Rock Engineering: From the Past to the Future Ulusay et al. (Eds) © 2016 Taylor & Francis Group, London, ISBN...

...) and rock quality designation (RQD) by Deere (1963) are used. Artificial Intelligence Reservoir Characterization metals & mining Upstream Oil & Gas reservoir geomechanics reserves evaluation GSI system rock mass strength Simulation variability compressive strength Rock Mech Monte...

... ABSTRACT: In situ stress is an important parameter in rock mechanics, and its measured value often displays significant variability. With the increasingly widespread application of probabilistic-based analyses in rock mechanics, incorporating stress variability in such analyses is becoming...

... with equation (2): (equation) where r and R correspond, respectively, to the number of Schmidt hammer rebounds for a weathered discontinuity (r) - as commonly found in situ - and for a non-weathered one (R). Reservoir Characterization Alejano variability percentile rock engineering Upstream...

... variability estimation rock engineering design value rock mass parameter partial factor Abstract The use of partial factors in rock engineering designs is currently debatable: one school of thought is that the limit state design method with partial factors in Eurocode 7 is inapplicable to rock...

... Inference Simulation variability available information slope stability example safety agreement index probability quantity aleatory variability subjectively probability distribution rock engineering non-deterministic parameter Rock Mechanics for Resources, Energy and Environment Kwas...

... prevents any simple characterization. In this paper we focus on the notion of variability: how it can be assessed, what is its importance and how it is integrated in the DFN modeling, from local scale to the largest site scale. The DFN characterization is only based on depth core logging data and the DFN...

... requirements. Theme: Design Methods. Keywords: Powerhouse, Strain-Softening, Dilation, Variability, Parametric Analysis. Eurock 2012 Page 2 1 INTRODUCTION Koprubasi Hydroelectric Power Plant (KHPP) is an 81 MW energy generating system which is built in north-western Turkey. The project consists of a 108 m high...

... uncertainty models, this paper discusses the shortcomings of EC7 to deal with epistemic uncertainty in the context of fractured rock masses, and emphasises the importance of firstly recognising the differences between aleatory variability and epistemic uncertainty, and secondly appreciating the implications...

... strength Upstream Oil & Gas confinement variability hydraulic fracturing brittle failure failure envelope failure process Steiner rock mass keynote lecture underground excavation Symposium consequence construction excavation brittle rock fracture Kaiser tunnel Rock Mechanics...

... on the stability assessment of a rock slope, using two common reliability techniques, the Monte Carlo simulation and Point Estimate Method. It was found that Monte Carlo is more suitable and not computationally demanding when variability is small. 1 INTRODUCTION 1.1 General The stability of rock slopes...

... formation presents different extremely variable characteristics. The construction of the tunnel is achieved in accordance with a sequential method, the excavation face following different configurations depending on the strength of the formation involved. The study comprises the modelling of a section...