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Keywords: axial stress
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Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-031
... Reservoir Characterization axial stress initiation specimen cavity numerical model Upstream Oil & Gas numerical simulation hole diameter granite lotidis fracture hydraulic fracturing stress level physical model primary fracture procedia engineering 191 compression physical specimen...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-016
...]. Upstream Oil & Gas uniaxial compressive strength test michael alber procedia engineering 191 crack damage reservoir geomechanics confinement mineralogical composition different method Reservoir Characterization axial stress specimen granite strength triaxial test experiment determination...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-118
... investigation Plaster hydraulic fracturing simulation result hole diameter BPM numerical model ahsc Simulation diameter boundary cavity fracture axial stress initiation shear crack granite compression ABSTRACT: In this paper, a numerical investigation is performed for the size and stress...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-056
... Department of Land and Water Resources Engineering, Engineering Geology and Geophysics Research Group, Royal Institute of Technology (KTH), Stockholm, Sweden ABSTRACT: This paper presents a systematic numerical study to evaluate the effects of two different loading conditions, namely the axial stress...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-009
... of the KE where strain is recorded under uniaxial cyclic loading. The differ- ence in inelastic deformation in a specimen between two successive loading cycles was used to determine the previously applied stress. The strain difference function j,i is defined as: where, is the applied axial stress and i...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2010, June 15–18, 2010
Paper Number: ISRM-EUROCK-2010-035
... are approximate values for granitic rocks found in Goodman (1989). Young s Figure 1. Schematic of the rock sample, meshed with 1504 triangular elements. 1 is the axial stress, and 3 is the confining pressure. Table 1. Material properties of the rock sample and the platens. Parameter Rock sample Loading platens...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2009, October 29–31, 2009
Paper Number: ISRM-EUROCK-2009-093
... caused by excavation at the earlier stage. Reservoir Characterization relative distance ventilation shaft shaft xx cross-section diameter cross-section observational construction structural geology final deformation concrete lining excavation construction axial stress convergence...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2009, October 29–31, 2009
Paper Number: ISRM-EUROCK-2009-041
... and secant Poisson's ratios, the threshold of absolute dilatancy, the axial strain at failure and the dilatant volumetric strain at failure. anna mudstone dilatant volumetric strain characteristic ultimate strength Reservoir Characterization axial stress axial strain threshold moisture...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 96, September 2–5, 1996
Paper Number: ISRM-EUROCK-1996-049
... recollection specimen metals & mining axial stress stress memory utagawa Reservoir Characterization cyclic loading acoustic emission sandstone loading takeoff point Kaiser effect estimation Upstream Oil & Gas accuracy delay time Signature granite katsuyama stress level Eurock '96...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 96, September 2–5, 1996
Paper Number: ISRM-EUROCK-1996-025
... of experimental simplicity, the majority of these tests are performed under isotropic loading conditions, where the externally applied radial stress equals the applied axial stress. On the other hand, in the analysis of HC test results, planestrain loading conditions are often assumed for simplicity, where zero...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 96, September 2–5, 1996
Paper Number: ISRM-EUROCK-1996-094
... Reservoir Characterization axial stress specimen borehole wall breakout test Upstream Oil & Gas borehole breakout investigation reduction strength breakout pattern boundary breakout gradient reservoir geomechanics concentration Hydrostone compression test tangential stress...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 96, September 2–5, 1996
Paper Number: ISRM-EUROCK-1996-080
...,) + (U1 - U sin 0'; = 0 (2) assuming that. the rock obeys to the Mohr- Coulomb yield criterion and the ratio of the hor- § :: l(IITJ u: lL Woo o-c oJ J -c 0.1 a: w <{ J 02 --PEN( - - - I1ESIDUIIL 0.0 31 2 AXIAL STRESS IN LIGNITE SEAM 00 (MPa) o 1 2 3 - I, ~ C ~ ~ Ul A, ~ 10.0 / ' z~ IS2 Ji:: 20.0- o...

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