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Keywords: cohesion
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Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0095
... Upstream Oil & Gas failure mode hydropower station Reservoir Characterization Engineering strength parameter argillaceous siltstone structural geology cohesion sandstone safety factor stability rock mass weak interlayer mechanical parameter Artificial Intelligence interlayer...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0126
... wellbore integrity collapse pressure cohesion Reservoir Characterization Engineering frictional angle MPa Wellbore Design strength stability fracture pressure Upstream Oil & Gas gas hydrate Biot coefficient depressurization pressure decrease pore pressure coefficient...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0226
...-analyzed triaxial compressive strength and uniaxial-strain compressibility data for sandstones from fields located in progressively buried basins and subjected to normal faulting stress conditions. New correlations are: a) a linear relationship between Apparent Cohesion the field's Virgin Vertical...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0301
... construction. reservoir geomechanics Engineering Martin Reservoir Characterization solid waste management cutoff international journal cohesion Upstream Oil & Gas volumetric strain Mining Science Diederich Perra excavation excavation damage zone structural geology strength Rock...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0502
... results from triaxial tests the authors have captured the essential components of grout failure, that are, cohesion weakening and frictional strengthening (CWFS) and mobilized dilation angle as function of plastic strain. After this procedure a consistent parameter set for the strain-hardening /softening...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0487
... ABSTRACT: The At high-stress conditions in hard rock masses, the behavior of intact rock plays a major role in crack initiation and propagation, defining damage conditions around excavations. For modeling brittle rock behavior, the Cohesion-Weakening-Friction-Strengthening (CWFS) linear model...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1672
... influence of the spatial variance on roof behavior. The stochastic model showed that the variability of cohesion and friction fields, especially the weak area, causes the failure to propagate in the immediate roof, which is different from the deterministic model. Additionally, comparing the principal stress...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1675
... residual properties, including strength, friction angle and cohesion. The current study presents the results of residual properties estimated from over 300 triaxial tests completed between 2005 and 2018 on core samples collected from a hard rock mine site. Testing was completed on a variety of...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-787
... flow Reservoir Characterization fluid injection cohesion MPa type injection Injection Rate permeability matrix rock mass injection Magnitude 1. INTRODUCTION Developing an Enhanced Geothermal System (EGS) in deep reservoir requires the creation of highly permeable heat exchanger. It is...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-788
... equilibrium analysis and finite difference analysis with shear strength reduction method. The effect of long term cohesion degradation on slope stability was explored using perfectly-plastic and strain weakening models. Lower values of rock mass cohesion led to lower factors of safety and smaller zones of...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-826
... which introduces a timescale to the problem. The introduced timescale preserves mesh objectivity of the method with much less computational efforts in comparison with other conventional non-local formulations. We define a statistical field for rock cohesion to involve microstructure effects in the...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-016
... Reservoir Characterization criterion simulation result relative size dashpot reservoir geomechanics Simulation cohesion stress state creep displacement Upstream Oil & Gas viscosity bingham viscoplastic model contact pressure borehole viscoelastic-plastic model deviatoric...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1349
... thermal method steam-assisted gravity drainage Reservoir Characterization Upstream Oil & Gas enhanced recovery recovery process SAGD shear failure Sagdox wabiskaw shale Wabiskaw cohesion thermal dependency clearwater shale shale mcm case compaction coefficient sagd only...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-713
... and hematite ore, complete stress-strain curves under different confining pressures are obtained. Post-peak mechanical properties of the rock and fracture characteristics are analyzed according to the test results. The rock subsequent yielding plane model characterized by generalized cohesion...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1101
.... complex reservoir Foundation Problem reservoir geomechanics Upstream Oil & Gas cohesion discontinuity hydraulic fracturing strength foundation load Elmo Symposium discontinuum stability rock mass equivalent continuum approach geometry rock bridge Scenario Reservoir Characterization...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1206
... well productivity with suitable results in terms of increment in porosity and permeability, and a advance in the wormholes up to 0.5 ft. reservoir geomechanics mechanism initiation wormhole Reservoir Characterization sand production cohesion sand liquefaction Upstream Oil & Gas...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1256
... of rock with weakness plane with different oil-water content, based on the single weakness plane theory. Secondly, the authors analyzed the effect of cohesion and friction angle on the strength used by the single variable principle and gave the trend of the deviator strength vs angle effected by them...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0139
... international journal drainage borehole Reservoir Characterization coalbed methane cohesion Fluid Dynamics BaseLine scenario operation borehole internal friction angle failure zone diameter principal stress key parameter failure zone size 1. INTRODUCTION Coal mining is extending to deeper and...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0174
... ABSTRACT: In recent decades, several researchers have found that the behavior of brittle rocks near excavation boundaries under intermediate to high stress conditions is best described by a Cohesion-Weakening-Friction-Strengthening (CWFS) Model. The advantage of CWFS over conventional shear...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0236
... & mining discontinuity surface rockfall facet plane roughness Bridge cohesion non-coplanar rock bridge point cloud fracture Upstream Oil & Gas contact wall surface area stability rock bridge hydraulic fracturing rockfall scar Proportion discontinuity excavation Indicator 1...

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