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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-2016-077
... 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 dynamic behavior...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-151
.... In situ two failure modes of pillars can be observed. These include structural 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...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-153
... of 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...
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...
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
... 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 ubiquitous joints...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-120
... to underground explosion S. Gharehdash & M. Barzegar Mining and Metallurgy, Amir Kabir University of Technology, Tehran, Iran 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...
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
... 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 the slope to study...
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
... Saline Aquifer Upstream Oil & Gas Reservoir Characterization Sequestration Simulation coupling pore pressure reactivation co 2 aquifer reservoir geomechanics modeling injection Vilarrasa constitutive model Rutqvist fracture permeability international journal storage...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-103
... 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° and 75...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-064
... to the European Standards (ETAG 027 guidelines). These prototypes have successfully met the guidelines and 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...
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
... 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 radioactive waste...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-023
... in thicknesses from 5m to 12m, and are spaced by inter- burden sandstones of various thicknesses. Full waveform forward modeling was car- ried 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...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-039
... that fragmentation is improved in areas between blast holes where the tensile waves meet, 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...
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 identification...

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