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Keywords: in-situ stress
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Proceedings Papers
Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-092
... described by an extended Drucker-Prager model, where the parameters were from a series of tri-axial tests. The traction-separation law describes the emergence and propagation of the interface. In sensitivity analysis, casing eccentricity, in-situ stress and the size of the initial micro-annulus were...
Proceedings Papers
Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-023
... Abstract Re-fracturing is a necessary and efficient way to improve the stimulated reservoir volume, enlarge the drainage area and enhance production again. The initiation and propagation mechanism of re-fracture, whereas, still maintain unclear due to complex in-situ stresses distribution...
Proceedings Papers
Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-305
.... The parameters have been adjusted according to the rock mass rating. The Phase2© stress modelling software and the hydraulic jacking test results have been used to simulate the in-situ stress conditions and calibrate the model. The results of a sensitivity analysis showed that the stress relief is mostly...
Proceedings Papers
Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-010
... ABSTRACT In-situ stresses are one of the most important elements for the design and stability assessment of rock engineering structures and earthquake science. Many in-situ stress inference and measurements techniques are devised and they are broadly classified into direct or indirect...
Proceedings Papers
Paper presented at the ISRM International Symposium - 6th Asian Rock Mechanics Symposium, October 23–27, 2010
Paper Number: ISRM-ARMS6-2010-103
... pressure in-situ stress wellbore integrity failure criteria calculation drucker-prager criterion MPa different rock failure criteria principal stress ISRM International Symposium 2010 and 6th Asian Rock Mechanics Symposium - Advances in Rock Engineering, 23-27 October, 2010, New Delhi, India...
Proceedings Papers
Paper presented at the ISRM International Symposium - 5th Asian Rock Mechanics Symposium, November 24–26, 2008
Paper Number: ISRM-ARMS5-2008-080
... vertical stress estimation in-situ stress block stability ISRM International Symposium 2008 5th Asian Rock Mechanics Symposium (ARMS5), 24-26 November 2008 Tehran, Iran 675 SOME ASPECTS OF MODEL UNCERTAINTIES OF BLOCK STABILITY ESTIMATION M. Bagheri and H. Stille Department of Civil Engineering, KTH...
Proceedings Papers
Paper presented at the ISRM International Symposium - 5th Asian Rock Mechanics Symposium, November 24–26, 2008
Paper Number: ISRM-ARMS5-2008-151
... and in-situ conditions. In this study, we have used the drilling and geomechanical data to constrain the in-situ stresses in one of the geothermal wells, NWS3. The magnitude of vertical stress (óV) was calculated from lithology log, the gradient of which is 0.031 MPa/m. Data of Leak-Off test and poroelastic...
Proceedings Papers
Paper presented at the ISRM International Symposium - 5th Asian Rock Mechanics Symposium, November 24–26, 2008
Paper Number: ISRM-ARMS5-2008-041
... Abstract The stability and safe operation of any underground excavations has been the prime concern of underground mine engineers. One of the most important parameters to obtain for underground mine planning is the in-situ principal stresses determination. The problems with the in-situ stress...
Proceedings Papers
Paper presented at the ISRM International Symposium - 2nd Asian Rock Mechanics Symposium, September 11–14, 2001
Paper Number: ISRM-ARMS2-2001-051
... ABSTRACT: The acoustic emission technique is an effective method to determine in-situ stress, and is mainly applied to vertical wells. A new method has been developed to determine in-situ stress for non-directional cores from the inclined well. Using coordinate system transformations...
Proceedings Papers
Paper presented at the ISRM International Symposium - 2nd Asian Rock Mechanics Symposium, September 11–14, 2001
Paper Number: ISRM-ARMS2-2001-145
... stresses. To verify this, the crack density was measured by DSCA for two cores of quartz diorite, which were taken by overcoming when a hemispherical ended borehole technique, one of stress relief method, was applied to measure in situ stresses at Kanetsu tunnel. The direction of the maximum crack density...