... Aydan (1993) and Aydan & Kawamoto (1994) that he proposed two models, namely, two layered model (TLM) and multi layered model (MLM) for the stress state of the earthquake. While these models had many important implications, the computed results were not consistent with in-situ stress measurements. Aydan...

... 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...

... 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. A detailed model of the mine, comprising 18 orebodies, was setup for analysis...

.... 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 mine it can provide valuable...

... 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 tensors were computed. Increasing with the depth of measurement...

... 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...

... 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...

... 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 role...

... 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...

...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...

... 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...

... 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...

... (.navuki.toshinori@obavashi.co.iP), Tatsuya Tanaka, Kenichi Ando Obayashi Japan Koji Oka, Naoki Nishizaka, Yuichiro Shimoguchi, Hiroshi Ogawa SEPCO Japan Kazu Saito Yon-C Japan Kiyotoshi Sakaguchi Tohoku Univ Japan Masaharu ltamoto 3D Geoscience, Inc. Japan ABSTRACT Several rock stress measurement techniques have...

... and 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...

...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...

... stress measurement principal stress 7th lntematlonal Symposium on ln-5Hu Rock Stress May 10-12, 2016, Tampere, Finland Johansson & Raasakka (eds) ISBN 978-951-758-606-1 ISSN 0356-9403 A STRATEGY TO COMPENSATE FOR AXIAL STRAINS INDUCED BY DRILLING DURING OVERCORING Ken Mills KMills@sct.gs SCT...

... 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...

... 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...

... 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...

...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...