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Keywords: threshold
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Proceedings Papers

Paper presented at the ISRM International Symposium – EUROCK 2021, September 21–24, 2021
Paper Number: ISRM-EUROCK-2021-183
... geology displacement rock engineering cloud resolution geologist europe government environmental science 833 epoch theory rock type sequence detachment information serbia government practice iop publishing iop conf deformation acquisition threshold pre-failure deformation...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-140
... in uniaxial compression tests. The results from both methods correlate well and show that the crack initiation and crack damage thresholds are about 46% and 78% of the uniaxial compressive strength of the intact rock respectively, slightly higher than the results reported in literature from previous studies...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-024
... threshold. Additionally, the deformation characteristics were determined. Mineralogical analyses including X-Ray Diffraction were performed on each specimen. Micro-textural variations were investigated with thin sec- tions of each tested specimen before and after mechanical perturbation. The thin section...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-092
...). metals & mining real time system ibis fmt Upstream Oil & Gas sub-bench failure radar yara suomi oy siilinjärvi ibis radar monitoring shear zone ibis radar cumulative displacement graph wedge failure pit wall threshold critical real time radar monitoring Rock Mechanics and Rock...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-001
... thresholds, crack initiation (CI) and crack propagation (CD), and peak strength using strain based methods. The results were used to determine the load levels for the relaxation and static load tests. The average axial strains at the desired load levels were used as a control mechanism for the loading...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-085
... overestimation of joint roughness. To denoise the TLS data, two wavelet transforms are applied in combination with different thresholds. The denoising procedure is successfully tested by comparing TLS data obtained on a 20×30 cm joint sample at a range of 10 m, to reference data for the same joint surface...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-032
... by both methods.An elastic wave may indicate a failure condition of a rock structure with advance or delay, in respect to the stress at the absolute dilatancy threshold, depending on a rock lithology. The non-integrity growths with growing rigidity of the rock. Consequently, with the increase of the non...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-085
... and the stability during design and construction analysis. Reservoir Characterization mean pressure triaxial compression path strength mechanism compression path threshold thermo-mechanical behavior waste management viscoplastic constitutive model dilation angle initial elastic threshold...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-100
..., a common example of DSGSD located in the North of Italy. Geological, geophysical and topographic investigations have been combined to develop an accurate physical model of the slope. However, some issues still need to be tackled and the definition of a reliable triggering threshold is yet a challenge. Our...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-036
.... The wave velocity reaches its maximum value near the threshold of absolute dilatancy but with discrepancies, depending on the lithology and depth modeled by pressure and temperature. Introduction Rock features at great depths are identified mainly by geophysical methods where lithological layers...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-092
... which results in a significant increase of the effective permeability in this zone. reservoir geomechanics strength waste management Upstream Oil & Gas threshold ti radioactive waste repository Reservoir Characterization repository chamber dimension extension Diederich radioactive...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-083
... thresholds for the rock can be identified. Crack initiation (CI) and crack propagation (CD) stresses correspond to long-term in situ strength and yielding (short term) strength of the rock respectively. The International Society for Rock Mechanics (ISRM) Commission on Rock Spalling aims to develop...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-141
... and beyond the damaged area the stresses are modified. These zones are collectively this is known as the excavation damages zones (EDZs). The lab results, including UCS and T as well as crack thresholds CI and CD can be used to determine numerical model input properties. With a large data set it is possible...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2010, June 15–18, 2010
Paper Number: ISRM-EUROCK-2010-071
... priority is to provide guidance for obtaining critical data from existing testing such as the UCS test. This data includes CI (Crack initiation threshold) and CD (Crack damage threshold). This paper outlines the new recommended terminology and procedures for measuring these two key thresholds. Spall...
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 2005, May 18–20, 2005
Paper Number: ISRM-EUROCK-2005-015
... Upstream Oil & Gas shale threshold structural geology calibration viscoplastic flow FEM model increment Reservoir Characterization stability analysis teschenite sill rheological parameter reservoir geomechanics regional model foundation geological condition geological time...

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