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Proceedings Papers

Paper presented at the 44th U.S. Rock Mechanics Symposium and 5th U.S.-Canada Rock Mechanics Symposium, June 27–30, 2010
Paper Number: ARMA-10-402
... of the ASTM 1550 testing and the back calculated in situ loading of the liner and how these demonstrate the overall performance of the FRS liner at the Devil's Slide Tunnel will be given. 1. INTRODUCTION The ongoing excavation at the Devil's Slide Tunnel Project of two 1250 meter tunnels each...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-437
... & Pavón Mendoza (Eds) © 2020 ISRM, ISBN 978-0-367-42284-4 From creep to rapid sliding: Back analysis of the Vajont landslide with the numerical DDA method Juan Pablo Ibañez Department of Civil Engineering, National University of Cuyo, Mendoza, Argentina Yossef H. Hatzor Department of Geological...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-684
... ABSTRACT: The Vajont landslide is an outstanding case history for the study and back analysis of complex instability mechanisms involved in sliding along planes of weakness in rocks. It moved a 250 m thick mass over a distance of about 500 meters horizontally, reaching velocities of 20 – 25 m...
Images
Mud motor <span class="search-highlight">back</span>-drive from the MWD pressure pulse disrupts toolface in <span class="search-highlight">slide</span>...
Published: 26 September 2022
Figure 20 Mud motor back-drive from the MWD pressure pulse disrupts toolface in slide drilling. (Time is on the Y axis with 10 seconds per major interval.) More
Journal Articles
J Pet Technol 60 (11): 65–68.
Paper Number: SPE-1108-0065-JPT
Published: 01 November 2008
... cleaning is most difficult because of back sliding of the cuttings inside the wellbore. Such cases require higher flow rates. Also, for inclined wellbores, fluids with high viscosities do not clean the hole as observed in vertical cases. Also, during drilling operations, the drillstring usually is rotating...
Images
An example of proppant <span class="search-highlight">sliding</span> <span class="search-highlight">back</span> on front side of dune after injection s...
Published: 12 October 2022
Fig. 9— An example of proppant sliding back on front side of dune after injection shut-in as shown by proppant pack image just before end of injection and after injection shut-in. Contour plot of proppant pack profile at 75% injection time (green color) shows large front dune angle, and subsequent... More
Images
Profiles of <span class="search-highlight">sliding</span> and opening (upper graphs), and &quot;<span class="search-highlight">back</span>-side&quot; stresses (i...
Published: 19 January 2011
Fig. 2 Profiles of sliding and opening (upper graphs), and "back-side" stresses (i.e., along the opposite side of the NF) (lower graphs) for a gap between the HF tip and the NF; ρ = 0.1 (left) and full contact (right). β = 40°, Π = 1, Δ = 0.1, and λ= 0.5. Note that scales in graphs for sliding a... More
Images
Profiles of <span class="search-highlight">sliding</span> and opening (upper graphs), and &quot;<span class="search-highlight">back</span>-side&quot; stresses (i...
Published: 20 January 2010
Figure 2 Profiles of sliding and opening (upper graphs), and "back-side" stresses (i.e., along the opposite side of the NF, lower graphs) for a gap between the HF tip and the NF ρ = 0.1 (left) and full contact (right). β = 40°, Π = 1, Δ = 0.1, λ = 0.5. Note that here and below scales in grap... More
Images
(a) UHSC sleeve actuation tool (front) and <span class="search-highlight">sliding</span> sleeve (<span class="search-highlight">back</span>) (b) UHSC s...
Published: 14 August 2018
(a) UHSC sleeve actuation tool (front) and sliding sleeve (back) (b) UHSC sleeve actuation tool latched into and shifting open a sliding sleeve More
Images
Torque and drag <span class="search-highlight">back</span> analysis showing prevision of difficult <span class="search-highlight">slides</span> close t...
Published: 24 September 2018
Figure 13 Torque and drag back analysis showing prevision of difficult slides close to 800mMD in expected 0,3/0,3 FF scenario More
Images
An example of proppant <span class="search-highlight">sliding</span>-<span class="search-highlight">back</span> on front side of dune after injection s...
Published: 27 April 2021
Figure. 9 An example of proppant sliding-back on front side of dune after injection shut-in as shown by proppant pack image just before end of injection and after injection shut-in. Contour plot of proppant pack profile at 75% injection time (green color) shows large front dune angle, and subseque... More
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-089
..., it is not necessary to assume the failure modes, either sliding or toppling, but it can identify whether sliding or toppling from measured displacements. In the proposed back analysis method both the critical shear strain and the anisotropic parameter play a major role. The critical shear strain can be determined...
Proceedings Papers

Paper presented at the 13th ISRM International Congress of Rock Mechanics, May 10–13, 2015
Paper Number: ISRM-13CONGRESS-2015-379
... landslide in Iran. The results indicate the applicability of the proposed method to obtain the key factors for the back analysis of a landslide in a cost effective manner. KEYWORDS Landslide, Back analysis, Pre-slide topography, slide profile Instructions INTRODUCTION Probably the most reliable method...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1366
... efforts, and unloading of the movement mass as another slice of mining advanced down the South Wall. 1. INTRODUCTION Back- analysis of a large-scale pit slope movement (O-Slide movement) at Bingham Canyon Mine was undertaken to confirm the mechanism of movement and calibrate relevant material properties...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2020
Paper Number: OTC-30795-MS
... the various components, i.e., flowline/pipeline, mudmat, jumpers, and the supporting soft seafloor behaving as one system. The design must ensure that the mudmat will not unduly sink, rotate or dig into the seafloor in the course of the back and forth sliding caused by many shutdown and startup cycles during...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583338
... and back-thrusts; and (ii) the development of NW-trending sinistral shear zones that offsets the earlier formed shortening structures, and which possibly formed due to spatial variations in the evolving rock strength as the flow arrested, resulting in intra-slide flow cells. Our study demonstrates...
Proceedings Papers

Paper presented at the ISRM Progressive Rock Failure Conference, June 5–9, 2017
Paper Number: ISRM-PRF-2017-014
... surfaces on the same slope have Holocene ages and indicate a reactivation of gravitational slope deformation. At site 6 the back- scarp and secondary sliding surfaces also have CN surface exposure ages of ~13.5 ka. CN surface exposure ages of the lower parts of the secondary sliding surfaces are identical...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 22–24, 2019
Paper Number: URTEC-2019-1115-MS
... disconnected from the rest of the string. Before the back-off, this BHA had drilled 190 ft in 19 hours, during which another section was slide drilled for 40 minutes, with a similar regime. Figure 14: Example of how an aggressive rocking operation can potentially lead to a back-off. URTeC 1115 18 In general...
Proceedings Papers

Paper presented at the 13th ISRM International Congress of Rock Mechanics, May 10–13, 2015
Paper Number: ISRM-13CONGRESS-2015-275
...: frictional sliding and damage by microcracking, which usually take place at cracks within cohesive geomaterials under compression. Focusing on the representative elementary volume containing multiple crack families, the free enthalpy of the matrix-cracks system is obtained. Importantly, a back-stress term...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-446
... of the back side Micro-piles are 4.97-6.23, 9.16-10.68, 5.49-7.26 times higher than that on the hillside side of the back side Micro-piles, the hillside side and river side of the front side Micro-piles, respectively, at the position of 25 cm below the sliding surface along the pile height. 1 Introduction...

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