... the normal strain distribution in the X direction and the shear strain distribution with the actual crack locations. INTRODUCTION It is important to evaluate the initiation and propagation of cracks in a rock mass during the cavity excavation. In the case of hard rock, the fracture initiation occurs...

... and by ii) estimating that represents the shear strain associated with the shear stress on the horizontal plane is expressed as: = 2 + 2 (3) With and the two components of along the and axis (Fig. 4). It is worth mentioning that the cross section of the vertical wells in horizontal plane is minimum...

.... To characterize damage evolution during creep, accumulated tensile and shear damage were quantitatively estimated according to non-elastic components of total apparent tensile and shear strains obtained from 2D-DIC. In addition, the evolution of strain, new crack creation, and development were investigated during...

... to determine it. Additionally, is has been characterized as the erosion strength because experiments show that it is a strong function of plastic shear strains which serve as erosion starting points. In this work, we created a series of finite element models considering the poro-mechanical coupling...

... to investigate fault and caprock stabilities is plastic shear strain which can be referred to yielding. An increase in fluid pressure due to CO2 injection within a porous reservoir induced stress changes within the reservoir and surrounding rocks. The results of plastic shear strain along faults from...

... geomechanics barre granite reservoir characterization upstream oil & gas hydraulic fracturing shear strain experiment relaxation experiment stress relaxation microcrack international journal threshold relaxation stage strength structural geology rock mechanics multistage relaxation...

... specimen hydraulic fracturing shear strain international journal fpz fracture peak load stage pure mode ii loading evolution specimen ndb-1 ARMA 21 2047 Investigation of Fracture Process Zone in Barre Granite under Mode II Loading Garg, Prasoon Colorado School of Mines, Golden, Colorado, USA...

... ABSTRACT: In this study, bump potential in the vicinity of a fault zone associated with a longwall mining excavation is evaluated with respect to the different stages of shear strain in the normal fault through the use of a numerical modeling technique. The influence of stored and dissipated...

... principal stress wellbore integrity strength roof layer differential stress sediment Wellbore Design Jackson proceedings evolution basin sediment shear strain mean effective stress Hudec Gulf Mexico deformation ARMA 18 637 Geomechanical modeling of stress and deformation associated...

... that controlled heating may help stimulate plastic deformation in shale that may result in shale barriers. The experimental results show that undrained heating under deviatoric stress may result in large plastic shear strains. Thermo-hydro-mechanically coupled finite-element simulations confirm that heating...

... horizontal stress field result in high shearing strains at pillar corners. The immediate roof strata in the N-S entry was subjected to high compressive strains of about 4 mm/m while low confining stress in the ribs resulted in high tensile strains. Contours of yielded zones in coal ribs extended 0.8 m (2.5...

... and residual strengths of the coal-mass are 4.3 and 0.35 MPa, respectively. The degradation parameter and the critical plastic shear strain of coal-mass are 0.485 and 0.2, respectively. 1. INTRODUCTION Potential rib instabilities, such as brow formation, toppling, bumps, etc. are threats in underground...

... Zone MPa interparticle bond deformation friction coefficient orientation shear strain sandstone shear strength permeability ARMA 13-427 Discrete element modeling of fault mechanics and permeability evolution for gas production and storage: Effect of shale content and distribution TerHeege...

... shear strain deformation band compaction band variation host rock cataclastic band ARMA 12-347 Heterogeneity within deformation bands in sandstone reservoirs Torabi, A. Uni CIPR, Uni Research, Bergen, Norway Alikarami, R. Department of Earth Science at UiB and Uni CIPR, Uni Research, Bergen...

... for the case of linear softening [2, 4, 5]. Upstream Oil & Gas sand production cylinder boundary TWC drawdown criterion cumulative solid production plastic zone elastic zone displacement shear strain solid production wellbore Reservoir Characterization strength geomechanics...

... strain Reservoir Characterization southern wall slope stability analysis reservoir geomechanics Earthquake Iran Upstream Oil & Gas History dynamic analysis mass classification critical shear strain boundary dynamic loading safety numerical modeling shear strength ARMA 12-382 Slope...

... drilling in low permeability formations is analyzed assuming undrained conditions. The paper compares the MCC and MIT-E3 predictions of critical mud pressures at which failure occurs; and deformations and shear strains around the wellbore at a reference mud pressure. For the horizontal wellbore, the MIT-E3...

... on the post-peak constitutive relation of rocks is the basis of the stability analysis of surrounding rock and the support design of anchor bolt. Upstream Oil & Gas shear strain residual shear stress shear stress shear stress-strain curve Reservoir Characterization mudstone post-peak curve...

... reservoir geomechanics modeling khersan iii hydropower plant renewable energy shear strain safety factor rock mass software general investigation slope stability plastic zone Engineering stability hydropower plant excavation area numerical modeling shear strength static condition ARMA 10...

... at the boundary with the substrate where overpressures drive failure in extension, by hydrofracturing. Failure in the basin overlaying the decollement initiates from these overpressures at the decollement. Where the evolution of permeability with shear strain is artificially suppressed, pervasive shear develops...