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Keywords: cohesion
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Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1135
... artificial intelligence pore pressure reservoir geomechanics reservoir simulation cohesion database subsurface storage injection flow in porous media upstream oil & gas material property international journal mpa fault zone fluid dynamics elastic strain fault core variation boundary...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1855
... of rocks surrounded by the weak matrix (Medley, 1994). Many scholars have studied its physical and mechanical properties, deformation, and failure mechanism for this particular geological body. Miller et al. (1957) studied the effect of coarse sand content on the mixture's cohesion and internal friction...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1863
... the applicable collapse pressure prediction model, takes the cohesion of rock as the evaluation index of drilling fluid anti-sloughing performance, and constructs the relationship chart between collapse pressure and cohesion. According to the field operation requirements that the hole enlargement rate...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1250
... the model results including Young's Modulus, Poisson's Ratio, UCS and Peak Strengths, and Crack Initiation (CI) and Crack Damage (CD) parameters. While several minor influences of heterogeneity on macroscopic properties were noted, the primary influence was that of contact peak cohesion heterogeneity on CD...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1379
... of peak shear strength, residual shear strength, cohesion, and friction angle for the tested coal samples. An exponential correlation was also observed between peak shear strength and the cleat aperture. The findings of this work represent a useful and important data set of the shear strength of coal...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1391
... pressure upstream oil & gas facilitating well planning wellbore stability reactivation geomechanical model boundary condition correlation stress boundary condition enhanced recovery structural geology fadhlan nik kamaruddin cohesion mechanical properties fault surface plastic strain...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0126
... and sensitivity analysis is performed to reveal the effects of original rock cohesion, Biot coefficient, frictional angle and pore pressure. The results show that the collapse pressure increases, while the fracture pressure decreases, with the decrease of NGH saturation. The collapse pressure decreases...
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-2019-0095
... 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 rock slope weathered depth...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0301
... 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 mechanics laboratory rock...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0502
... on 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
... 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 magnitude...
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...
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...
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...
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...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-016
... 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 stress constitutive model power law viscoelastic-plastic model...
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
... 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 wellbore...

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