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Keywords: variability
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Proceedings Papers

Paper presented at the ISRM International Symposium – EUROCK 2021, September 21–24, 2021
Paper Number: ISRM-EUROCK-2021-054
... 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...
Proceedings Papers

Paper presented at the ISRM International Symposium – EUROCK 2021, September 21–24, 2021
Paper Number: ISRM-EUROCK-2021-179
... 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...
Proceedings Papers

Paper presented at the ISRM International Symposium – EUROCK 2021, September 21–24, 2021
Paper Number: ISRM-EUROCK-2021-019
..., 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...
Proceedings Papers

Paper presented at the ISRM International Symposium – EUROCK 2021, September 21–24, 2021
Paper Number: ISRM-EUROCK-2021-045
... 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...
Proceedings Papers

Paper presented at the ISRM International Symposium – EUROCK 2021, September 21–24, 2021
Paper Number: ISRM-EUROCK-2021-192
...-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...
Proceedings Papers

Paper presented at the ISRM International Symposium – EUROCK 2021, September 21–24, 2021
Paper Number: ISRM-EUROCK-2021-195
... 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...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-043
... 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...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-102
... 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...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-180
... 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...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-182
...) 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...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-013
... 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...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-033
... 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...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-252
... in EN 1990 is aimed mainly at manufactured materials and hence defines the characteristic value of a parameter as the 5% fractile of an unlimited test series having a known statistical distribution, i.e. the parameter is a random variable defined by a stochastic function – it follows the so-called...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-010
... 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...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-019
... 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...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-137
... 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...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-157
... 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...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2010, June 15–18, 2010
Paper Number: ISRM-EUROCK-2010-003
... 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...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2010, June 15–18, 2010
Paper Number: ISRM-EUROCK-2010-129
... 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...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2002, November 25–27, 2002
Paper Number: ISRM-EUROCK-2002-065
... extremely variable characteristics. he construction of the tunnel is achieved in accordance with a sequential method, the ~xcavation face following different configurations depending on the strength of the formation Involved. The study comprises the modelling of a section for different materials...

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