1-20 of 35
Keywords: Magnitude
Close
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-006
... overall granite rock mass may be viewed as a combination of stiff elastic blocks separated by soft low strength material, leading to a fairly large scale homogeneous axisymmetrical stress field with vertical axis, with local strong anomalies that correspond to either high or low stress magnitudes...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-008
... principal stress direction and that the maximum horizontal principal stress orientation is very steady over this area ( N 153±15" E). II has also provided means to establish a vertical profile for the magnitude of all principal stress components. Results are shown on figure 2. They outline a very small...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-004
...@canada.ca) Natural Resources Canada Canada Benoit Dub~ Natural Resources Canada Canada ABSTRACT Three measurement campaigns were carried out by Natural Resources Canada CANMET Laboratories over the last thirty years within the Red Lake Gold District, Ontario, to determine the magnitude and orientation of in...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-002
... hydraulic fracture barely touch each other provides a unique way to determine the minimum principal stress magnitude. This hydraulic testing method has been adapted to measuring the pressure required to reopen mechanically a preexisting fracture of known orientation (HTPF method). Today, for crystalline...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-046
... Reservoir Characterization accretionary prism sonic velocity reservoir geomechanics stress magnitude OHmax Upstream Oil & Gas Finland Johansson Chang stochastic approach principal stress misfit effective stress ln-5itu rock stress Magnitude Artificial Intelligence OHmin rock...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-031
.... The maximum variation of stress magnitude and orientation is ca. 11 MPa and 70°. Brittle deformation zones were, however, modelled as best-fit planes and the effect of true discontinuous, curved I bending /undulating faults remains unclear until the next planned model revision. Additionally, local...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-051
... algorithm Magnitude seismic event Rock stress contact zone 7th International Symposium on ln-5itu Rock Stress May 10-12, 2016, Tampere, Finland Johansson & Raasakka (ads) ISBN 978-951-758-606-1 ISSN 0356-9403 EVALUATION OF INDUCED SEISMICITY RISK IN THE PYHAsALMI MINE Mateusz Janiszewski...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-056
... lntamatlonal symposium evaluation method Upstream Oil & Gas stress result Magnitude fractured rock stress measurement FEM result principal stress 7th lntamatlonal Symposium on ln.Situ Rock S1ras8 May 1G-12, 2016, Tampera, Finland JohanMOn & R.aasakka (ed J ISBN 978-951-758-1Kl6-1 ISSN 0356-9403...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-042
.... In particular, the time of ice cover and related forebulge, maximum thickness of the ice cover, and the retreat of the ice cover are considered. Modelling results demonstrate that the magnitudes and the stress drops of the induced seismic events associated with fracture slip tend to be the largest...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-017
..., breakout azimuths can be used to estimate stress orientation, but breakout geometry (width) should not be used to estimate stress magnitudes. The orientation of the maximum horizontal principal stress (SHmax) is determined to be NE-SW to -2000 mbsf, subparallel to the subduction margin between Philippine...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-048
... (CCBO) technique. Measurement period is from 1991 to 2015. Main results obtained in this study can be summarized as follows. The magnitudes of the three-dimensional principal stresses and the vertical stress at one year after the earthquake were more than double those before the earthquake. The...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-029
... Fracturing test DIFS Breakout Figure 1. The orientation of maximum horizontal stress with depth (GeoGeny, 2012). 334 7th International Symposium on ln-51tu Rock stress May 10-12,2016, Tampera, Finland Johansson & Raasakka (ads) ISBN 978-951-758-806-1 ISSN 0356-9403 ORIENTATION AND MAGNITUDE OF IN-SITU...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-034
... solely for the stress determination. The redundant data set allows us to determine both of the stress magnitude and orientation in multiple ways, and the validity of rasuHs can be confirmed from their consistency. In order for applying this concept to the stress measurement at deep depth, we have been...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-035
... phenomenon that causes the elastic modulus to vary with the first stress invariant; effectively the confinement provided to the rock fabric. Measurements indicate that the elastic modulus in coal measure strata (elastic modulus range 3 GPa to 40 GPa) typically doubles in magnitude from an unconfined state to...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-009
... stress within, and beyond, the area affected by the stress concentration surrounding the excavation. When possible, hydraulic fracturing is used to provide independent information about the magnitude of the least principal stress, but is not used to estimate the maximum horizontal principal stress. In...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-010
.... They raise the question on the origin of stresses in sedimentary formations and on spatial stress variations. Finally, consequences for integrating data collected at different depths in sedimentary formations are briefly discussed. reservoir geomechanics stress magnitude Zoback Cornet...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-055
... phenomena disclosed during the excavation of the auxiliary tunnels and the underground testing sites. Based on these data, the multi-methods integration analysis is carried out to estimating the regime, orientation and magnitude of the in-situ stress at this site. The analysis indicates that the accuracy of...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-035
... of magnitude 8 90 -flips of polarisations in critically-high pressurised rocks 9 Fossils deformation matched by transformation grids DYNAMIC EFFECTS Changes in SWVA during production procedures 10 Changes after pumping tests 11 Changes after critically-high- and low-press. CO2- injections Changes in...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-114
... maximum compression direction, which is in accord with the contemporary earthquake focal mechanism solutions, as well as the first order pattern of tectonic stress direction in the eastern Eurasian plate. The current stress tensor exhibits a heterogeneity in its orientations and magnitudes, possibly...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-065
... ABSTRACT: This paper presents a case study of a deep-buried underground tunnel project with the buried depth of 1000 m in south-western China. Both the magnitude and direction of the geo-stress were determined through the field measurement. The stress distribution law of the tunnel with...

Product(s) added to cart

Close Modal