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Keywords: principal stress
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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-2016-009
... and the direction of maximum principal stress is also nearly in EW direction. Though the two segments of tectonic stress states have different stress regimes, they both indicate that the characteristics of the recent tectonic stress state along the Longmen-shan fault is dominated by near East-West compressional...
Proceedings Papers
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-001
... Rock stress stress field seismicity principal stress Abstract Knowledge of stresses is an important component of any geomechanical design task. This requirement is accentuated in deep mines, where stresses not only lead to fracturing around excavation boundaries, but include induced...
Proceedings Papers
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-007
... and the maximum shear failure criterion on the fault zone, and simulate the earthquake brittle rupture by decreasing shear modulus. After Wenchuan earthquake, the crustal stress field shows that: In the middle and the northern section of Longmen mountain central fault zone, the shallow maximum principal stress...
Proceedings Papers
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-012
... issn Canadian Shield principal stress reservoir geomechanics dight Deformation Rate analysis determination numerical model international symposium 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...
Proceedings Papers
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-026
... hydraulic fracturing normal stress hydroelectric project rock mass Upstream Oil & Gas Finland Johansson proceedings fracture stress measurement principal stress Reservoir Characterization flow rate borehole Symposium Injection Rate critical pressure reservoir geomechanics...
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
Toshinori Nayuki, Tatsuya Tanaka, Kenichi Ando, Koji Oka, Naoki Nishizaka, Yuichiro Shimoguchi, Hiroshi Ogawa, Kazu Saito, Kiyotoshi Sakaguchi, Masaharu ltamoto
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-056
... 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-2016-028
... circumference stress measurement principal stress Abstract In the overcoring process, strain changes measured during stress relief are used to calculate the in situ stresses. During analysis, multiple measurements of the axial strain are usually averaged to provide a single valued estimate...
Proceedings Papers
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-043
... reservoir geomechanics Upstream Oil & Gas Raasakka Artificial Intelligence trial stress state stress state Reservoir Characterization fracture characterization focal mechanism solution tohoku-oki earthquake Finland Johansson aftershock spatial distribution principal stress...
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...
Proceedings Papers
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-053
... reservoir geomechanics observation equation Finland Johansson Reservoir Characterization Upstream Oil & Gas Raasakka water management Yokoyama Rock stress in-situ rock stress shut-in pressure ps borehole high stiffness mechanism principal stress hydraulic fracturing compliance...
Proceedings Papers
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-029
... experiments on rock core samples extracted from EXP-1. Instead of simply averaging the principal stress and orientation data from independent measurement methods, we took an average after transforming the measured in situ stress data to an identical axis. A few examples with synthetic data shows...
Proceedings Papers
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-050
... Artificial Intelligence stable state coefficient reservoir geomechanics minimum horizontal principal stress pressure coefficient formulae Reservoir Characterization stress magnitude crust pore pressure coefficient stress shape factor principal stress maximum horizontal principal...
Proceedings Papers
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-020
... by using 6 different methods. The closure pressures from 4 methods were consistent with the actual minimum horizontal principal stress ( S h = 5 MPa). Considering the effect of experimental system flexibility, the measured reopening pressure and theoretical reopening pressure were compared...
Proceedings Papers
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-045
... Finland Johansson lateral stress loading deformational response RTE stress path CTC loading path moduli principal stress international symposium 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...
Proceedings Papers
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-055
... Characterization Upstream Oil & Gas metals & mining extensometer Finland Johansson onkalo test site rock mass modulus test site ritala rock mass reservoir geomechanics displacement stress state change Rock stress principal stress linear regression excavation international symposium 7th...
Proceedings Papers
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-019
... of the maximum horizontal principal stress. After the measured data were compared with the results gained with the traditional fracture impression method, the findings show that this method is of high precision and operation speed, simple and energy and time-saving. Especially in the deep measurement boreholes...
Proceedings Papers
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-009
... of 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...
Proceedings Papers
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-054
... of Science, the orientation and magnitude of the primary 339 Table 1. The technical characteristics of the drill hole. Drill hole Measuring point Altitude/ Hole Dip depth/m m depth/m Azimuth/ angle/ 361 918 11.2 225 14 Table 2. The measurement results of ground stress. Principal stress Vertical magnitude...
Proceedings Papers
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-034
...: Conventional inversion methods for in situ stress determination from fault slip data obtained from focal mechanism solutions, define the optimum stress as the maximum point of the object function. In this research, object functions are computed for a mesh of principal stress directions and stress ratios...
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