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Keywords: Magnitude
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Proceedings Papers

Paper presented at the ISRM International Symposium – EUROCK 2021, September 21–24, 2021
Paper Number: ISRM-EUROCK-2021-142
.... High magnitudes of rock stress result in large deformation of underground spaces leading to collapse such as rock burst. Therefore, a better prediction and understanding of rock behaviour to prevent failures and ensure safe work conditions is crucial in the risk management of underground structures [1...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2020, June 14–19, 2020
Paper Number: ISRM-EUROCK-2020-008
... assumption tunnel magnitude reservoir characterization kirsch solution rotation deposition tunnel maximum tangential stress reservoir geomechanics plane-strain condition multiple deposition hole notch evaluation ring © International Society for Rock Mechanics and Rock Engineering Norwegian...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2020, June 14–19, 2020
Paper Number: ISRM-EUROCK-2020-052
... method underground excavation principal stress magnitude A place within the rock mass remains supporting stresses in a state of equilibrium; when the excavation is carried out, an empty space is produced, redistributing the stresses and generating a new state of stresses. In some cases...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2020, June 14–19, 2020
Paper Number: ISRM-EUROCK-2020-044
.... 2010, Kozyrev et al. 2017). The researchers performed the in-situ measurements using an electromagnetic and ultrasonic method. The results of the studies have shown that the level of the stresses doesn t exceed the critical magnitude, and that vertical stresses are dominant at the considered area...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-105
... equivalent aperture procedia engineering 191 Scenario Injectivity Index in-situ stress magnitude wellhead pressure Magnitude Procedia Engineering 191 ( 2017 ) 829 837 Available online at www.sciencedirect.com 1877-7058 © 2017 The Authors. Published by Elsevier Ltd. This is an open access article...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-130
... network of natural fractures, fluid columns built along the fracture network increase the local state of stress by stress shadowing. Hydro-shearing of the natural fractures that were under increased stress state can be explained as the main mechanism responsible for occurrence of larger magnitude...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-112
... the longitudinal development of the displacements. Case histories and numerical simulations have shown that the magnitude of the displacements can differ almost by an order of magnitude for cases where the strike is parallel and perpendicular to the tunnel axis respectively. The reason is the usually low shear...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-098
... reservoir geomechanics Earthquake measurement station stress measurement Magnitude tatsuya yokoyama procedia engineering 191 tohoku-oki earthquake continuous measurement principal stress tohoku-oki mainshock Kamaishi sanriku-oki low-seismicity region in-situ stress measurement...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-094
... microstructural property hardness tortuosity crack network indentation modulus procedia engineering 191 evolution wellbore integrity structural geology average value mechanical property nanoindentation test permeability Magnitude deconvolution technique Procedia Engineering 191 ( 2017 ) 735...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-166
... as a zero for all recordings on the basis of heat transfer analysis. The patterns of strain variations are almost similar in each position of the sample, although the axial strain in Figure 4c has large discrepancy in magnitude. The maximum shrinkage records at the circumferential and diagonal strains...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-168
... overview of in-situ stresses. The stress tensor gained with the borehole slotter showed a comparatively large scatter regarding magnitude and orientation of 1, 2 and 3. Through the supplementary hydraulic fracturing testing, the aforementioned results could be complemented and the magnitude of 3 could...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-158
... INTRODUCTION Stress equilibrium exists in all virgin stress environments and the removal rock due to mining results in the redistribution of stresses along the periphery of excavations. Depending on the magnitude of post mining stresses and the strength of the rock mass the stability concerns may arise. Roof...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-195
... calculation tensile strain Van der Merwe Magnitude Fluid Dynamics surface subsidence maximum tensile strain principal strain post mining field observation subsidence subsidence profile equation metals & mining tilt tilt profile compressive strain underground coal mining...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-079
... local magnitude event. The mine-scale study explores the effects of material properties on the magnitude and extent of failure while offering plausible mechanisms for the initiation of massive unstable failures and their resulting energy magnitudes. 1 INTRODUCTION The objective of this study...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-087
.... The aperture magnitude was varied to the point that overall hydraulic conductiv- ity was equal to conductivity of real samples from Sellafield site, UK. Hydraulic conductivity for the carbonated rocks in Sellafield site was 2.4 10 15 and results showed that the desired aperture between VEs is 0.085 µm...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-153
... stress case joint network Reservoir Characterization railway tunnel numerical modeling rock mass tunnel extensometer shallow depth MPa situ stress odenplan station Platform tunnel Magnitude ABSTRACT: At shallow depth, in situ stress can affect significantly the behavior of the rock mass...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-097
... horizontal stress stress measurement gradient Upstream Oil & Gas Stephansson Waste Management Co stress field Forsmark stress model swedish nuclear fuel frictional strength principal stress Magnitude reservoir geomechanics pore pressure SKB repository depth situ stress field stress...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-011
... orientation major feature intersection stress load Reservoir Characterization underground space main fault project area ductile environment stress condition Upstream Oil & Gas Earthquake stress state horizontal stress component tunnel deformation stress level Magnitude ?? ABSTRACT...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-058
... the suitability of Opalinus Clay as a host rock for a radioactive waste repository. We have conducted measurement campaigns of over eight weeks total duration. 19 earthquakes were found additionally to the bulletins of earthquake services. We identified nine earthquakes with a magnitude range of ML=-0.8 to -1.8...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-235
... common and the main cause for most of problems during drilling operations. In this study, the existing relevant logs, drilling and other data from offset well were analyzed and integrated to construct a precise Mechanical Earth Model (MEM) describing pore pressure, stress magnitudes and orientation...

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