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Keywords: stress measurement
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Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-003
... direct stress measurement method as it is less costly and it can be performed under well-controlled conditions in laboratory once sampling is done. Indirect stress inference techniques utilizing borehole breakouts, fault striations and earthquake focal mechanism solutions are also proposed and used...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-006
... cavem and hydraulic pressure tunnel, several in situ stress measurements were carried out, using hydraulic, overcoring and flat jack techniques. Integration of the several in situ test results through a continuum mechanics model shows that the long-term behavior of this granite rock mass differs...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-010
... Wettainen LKAB Swaden Gonzalo Corral Itasca S.A. Chile Jonny Sjoberg Itasca Consultants AB Sweden ABSTRACT This paper describes three-dimensional numerical stress modeling of the LKAB Malmberget mine and stress calibration of the model, using the results from newly conducted stress measurements at the site...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-001
... spatially and temporally. An example shows its ability to detect significant modification to the local stress field in the vicinity of a large seismic event. The method can only be used if there is induced seismicity, so it is not a substitute for conventional stress measurement. However, in an operating...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-004
...-situ rock stresses on several levels of the Campbell and Red Lake gold mines, at depths ranging from 600 meters down to 2,000 meters below surface. Stress measurements were carried out using standard CSIR triaxial 'hollow-inclusion' and biaxial 'doorstopper-type' measurement cells. In-situ 3D stress...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-002
... well production. A detailed history of the method and a thorough description of the equipment and set-up has been presented by Haimson (1993). We describe first a typical HF test as routinely run for stress measurements. It may be recalled here that the selection of the borehole depths where to run...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-013
... above lively city centre and fractured rock the project included an in-situ stress measurement campaign and rock mechanics stability studies, e.g. 2D and 3D numerical analyses and rock monitoring during construction. Rock stresses play often an important role in the rock engineering projects in Finland...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-011
..., simulations are used to estimate the stability of the extension. The simulation results are compared to the current mining environment and studies above level 500 in order to evaluate the conditions in the deeper mining environment. An extensive stress measurement program has been initiated and will be in...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-015
... 1960ies developed equipment for in-situ rock stress measurements, including 2-D and 3-D overcoring and hydraulic fracturing. This also includes equipment for monitoring of rock stress changes. SINTEF carries out stress measurements on a commercial basis, which has resulted in measurements at more than 150...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-026
...711llntemational Symposium on ln-5ilu Rock Slress May 1D-12, 2016, Tampere, Finland Johansson & Raasakka (ads) ISBN 976-951-758-606-1 ISSN 0356-9403 HYDRAULIC FRACTURING STRESS MEASUREMENTS IN FRACTURED ROCK MASS AT A HYDROELECTRIC PROJECT *DS Subrahmanyam, **G Shyam, **K Vamshidhar, **Vikram...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-061
... concerning tunneling in difficult rock stress conditions has been started at the Kemi mine. The results from the rock mechanical simulations are compared to the measured displacements. Input data for the rock mechanical simulations are rock stress measurements, Q' classification from drill holes and drifts...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-031
... Abstract Although stress measurements have been conducted in numerous locations in the ONKALO facility located in Olkiluoto, the prevalent trend of the maximum horizontal stress has yet to be defined to an extent where it is acceptable. As Posiva is responsible for the safe deposition of spent...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-056
... Abstract Several rock stress measurement techniques have been proposed by different research groups. Due to factors that cannot be visually confirmed, such as for instance rock type, geological structure and heterogeneity, the applicability and accuracy of the different measurement techniques...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-037
... laboratory measurement techniques have been proposed. For scientific deep-drilling projects, the combined application of borehole methods and core-based methods is suitable to obtain a complete stress tensor and to enhance the reliability of the stress measurement results. As a corebased method, a simple and...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-027
...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 APPLICATION OF THE INVERSE PROBLEM TO STRESS MEASUREMENT INTERPRETATION IN ANISOTROPIC ROCK Robert Corthesy (.rcorthesy@oofymtl.caJ Maria Helena...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-028
... corresponding component from the 45° and 135° gauges and recalculating the in situ stresses so that only axial strains associated with stress relief are used to calculate the in situ stresses. KEYWORDS Overcoring, stress measurement, drilling induced axial strains, ANZI strain cell, axial strain compensation...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-048
... Abstract In-situ rock stress measurement was carried out in the Kamaishi mine of lwate prefecture to quantify the variation of the shallow crustal stress field associated with the 2011 Tohoku-oki earthquake. Stress measurement was conducted by the Compact Conical-ended Borehole Overcoring...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-053
... Abstract Hydraulic fracturing technique is a measurement method of in-situ rock stress. This technique has the highest track record for techniques used in sub 1000 mater. This technique is comparatively simple and easy for in-situ stress measurement, because a pre-existing drilled borehole is...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-029
... borehole, EXP-1, which is about 1 km in depth. Three hydraulic fracturing stress measurement tests were conducted at around 700m depth. Several borehole breakouts and drilling-induced fractures were observed at similar depth from the borehole televiewer. The analysis combining the hydraulic fracturing...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-044
...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 LABORATORY VERIFICATION AND CALIBRATION EXPERIMENTS FOR STRESS MEASUREMENT OF UNCONSOLIDATED FORMATIONS BY ANELASTIC STRAIN RECOVERY METHOD Yu Nagano...

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