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Keywords: modeling
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Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2020, June 14–19, 2020
Paper Number: ISRM-EUROCK-2020-044
... multiple mining methods in the same area, which can affect rock mass stability in and around this area. The stress state transformation forecast is necessary to determine the optimal direction and parameters of mining in terms of geomechanics. Numerical modeling is widely used for the stress state...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-151
... controlled failure along natural discontinuities and strength failure of intact rock. The observed failure modes were confirmed by numerical 3D modeling based on results of laboratory tests including peak and residual strength tests at rock samples and shear tests along discontinuities. 1 INTRODUCTION In the...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-077
... of the drillstring; however, few of them took the bit-rock interaction into consideration. Therefore, a better understanding of the dynamic behavior of the drillstring in the presence of bits is necessary. In this paper, a new model is developed basing on Timoshenko beam theory to describe the...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-153
... displacements were recorded during the excavation. A sensitivity analysis of in situ stress in this area is thus required. As the rock mass is highly discontinuous, discrete modeling using 3DEC software is performed with three different in situ stress cases estimated from measurements. The results show that...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-154
... Abstract The improvement of PCD cutting tools requires a better understanding of rock cutting mechanism. For the moment, the study of this mechanism is based on laboratory tests and numerical modeling. For the numerical aspect, distinct element method seems to be more efficient than finite...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-159
... Abstract Multiple Point Geostatistics (MPS) is a timely approach for the three-dimensional modeling of the geological substrate. As compared with 3D design approaches, model update is straightforward and reproducible. In contrast to traditional, variogram-based geostatistical modeling and...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-151
... peak strength criteria reservoir geomechanics modeling triaxial compression strength criteria Upstream Oil & Gas criterion rock peak strength polyaxial strength criteria Reservoir Characterization deviatoric plane Strength Criterion strength hoek-brown strength criterion polyaxial...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-136
... 1385 where the largest displacements have been recorded. By assuming an elliptic deformation of the tunnel walls, a preliminary geometrical treatment of the raw data is presented to determine the principal axes of deformation. A new anisotropic time-dependent constitutive model, which includes...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-120
... Abstract The recent theories and many modeling attempts in the field of sciences which originated in the XXth century put forward the idea of informational fields as an objective necessity when it comes to explaining numberless phenomena having non-standard behaviour. The existence of...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-239
...), which were analyzed and designed using the numerical modeling software UDEC. The required level of support using pattern bolts and mesh for each rock slope is compared between a Eurocode 7 Design Approach 1 Combination 1 and 2 against a design using a global factor of safety approach. The paper...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-092
... get detailed topography and the slope face 3D modeling. Introduction Two of the biggest problems in the realization of projects of stabilization of slopes can be: – During the measurement of the elements of containment, as it is complicated to find rigor with the measurement of the surface of...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-082
... pressure gradient. To better understand this problem a coupled multiphase flow and geomechanical simulation workflow is implemented and further developed to model cavity growth during water flooding. The growth of the cavity as a function of time is assumed to be known and the evolutions of the surrounding...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-007
...-bore integrity, existing fault reactivation and potential notable seismic events, have received increasing attention from researchers, policy-makers and the general public. In order to address these challenges, many analytical methods, including analytical analyses, numerical modeling and response...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-103
... house by the Laboratory of Geomechanics & Mining Equipment of ITB in Indonesia. Dimensional analysis was used to scale down the model from a real slope condition in an open pit coal mine. The material used in this study is consolidated clayey sand with slope heights of 10 cm, slope angles of 45°, 60...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-064
... now have official ETA approval and CE marking. A series of quasi-static tests on flexible chain-link net specimens and small-scale impact tests were carried out to check the material model assumptions and to calibrate the input data. Furthermore, a prototype of one of the ETA barriers was numerically...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-031
... single cutter configuration. These tests are meant to generate results to improve the understanding of the mechanics of drill bit – rock interaction. The paper also describes the use of a numerical tool based upon the discrete element method to model the experiments. The laboratory experiments consist...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-092
... radioactive waste disposal. The selected potential host rock is a granite complex in the Mórágy Granite Formation in the south-western part of Hungary, close to the village of Bátaapáti. The goal of this paper is to present the newest modeling results of the Excavation Damaged Zones around the Bátaapáti...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-023
... 12m, and are spaced by inter-burden sandstones of various thicknesses. Full waveform forward modeling was carried out using a finite difference scheme to determine the optimal location of the 3-component sensor for identification of coal seams using an optimized wavelet as a drill-bit source. Forward...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-039
..., overlap and interact. In this study, a numerical methodology using the code LS-DYNA was developed. LS-DYNA is a commercially available multi-purpose finite-element code, which is well suited to various types of dynamic modeling. Two different element formulations were used — Euler formulation in, and...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-122
... of 420 meters in crystalline rock. This paper presents results from the initial identification, characterization and modeling of a small number of fractures close to the tunnel opening. So far, these fractures have been identified as the most important water-conducting fractures. In this...

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