..., numerical analysis was conducted using two dimensional particle flow code. geothermal reservoir 13th international congress structural geology Shear Characteristic Reservoir Characterization strength joint surface normal stress rock joint surface Montreal Upstream Oil & Gas...

... sandstone (LS), shale/shale (SS), bone/bone (BB), bone/limestone (BL), and limestone/limestone (LL) were tested. The number of samples tested for each bedding plane were: SL- 11, SSs- 8, SB- 5, BB- 4, LS- 6, SS- 9, BL- 1, and LL- 2. Peak and residual shear strength values at 2.75 MPa normal stress range...

... 13th international congress haque shear displacement shear behaviour Upstream Oil & Gas concrete rock joint constant normal stiffness shear strength model drilling operation rock joint dilation peak shear stress Reservoir Characterization normal stress laboratory regular rock...

... samples (90 mm diameter and 50 mm height) are made by mixture of cement, sand, and water in the ratio of 1:1.5:0.45 (by weight). Direct shear tests are conducted on these samples in twelve directions at 30° apart at four different normal stresses (250kPa, 500kPa, 1000kPa, and 1500kPa). Thus, 48 samples...

... been performed. In the tests A and B, the same value of the spacing free of encapsulating material about the shear plane (s, s = 20 mm) is used for two different values of the normal stress = 141 or 564 kPa). In the tests A, C and D, three different values of the spacing (5, 20 or 30 mm) are considered...

... of rock mass under a normal stress varying from 0 to 2.0 MPa. Concrete was used as a model material to simulate intact rock and, elemental blocks of size 150 mm x 150 mm x 150 mm were used to form the mass specimens. Steel bolts of 6 mm diameter with 2 mm thick grout were used to reinforce the mass. Three...

... normal stress newcrest mining shear strength metals & mining Rock mechanics Rock Slope Reinforcement rock mass shear pin strength discontinuity inclination installation relation plane open cut mining compression mechanics reinforcement scheme Harmonising Rock Engineering...

... starting from the DSM (Digital Surface Model) of the rock discontinuity. By analyzing results reported in technical literature, one can deduce that damage depends upon starting joint geome- try, acting normal stress n, cumulated displacement and by dilation velocity. Based on this evidence Homand et al...

... reservoir geomechanics variation Stockholm SKB Reservoir Characterization diffusivity hydraulic conductivity hydraulic diffusivity repository permafrost pore pressure ice sheet Lönnqvist rock mass Upstream Oil & Gas fracture Sweden hydrostatic pressure normal stress HÃ...

... ABSTRACT This paper presents a composite element algorithm of coupled Seepage and normal stress processes in fractured rock mass. "Filled model", which regards the asperities on the fracture as a layer of granular material having high porosity and clipped by the two parallel plates was used...

... velocity and shear history on the shear behavior of rock fractures. log analysis displacement residual stage well logging shear loop mechanical property shear test Upstream Oil & Gas normal stress shear velocity asperity shear velocity dependency friction angle deformational...

... that a wedge failure was the most likely failure mechanism associated with the orientation of the discontinuities. The shear strength of the discontinuities was analysed and the estimated maximum normal stress acting beneath the slope was determined. The empirical determination of shear strength allowed...

... conditions, the effects of normal stress and normal stiffness on the contact area distribution were discussed. numerical method shear behavior plane shear displacement strength normal stress inactive element peak stage contact area Reservoir Characterization displacement rock joint contact...

... lining coefficient mechanical behavior normal displacement displacement specimen MPa Upstream Oil & Gas water content callovo-oxfordian claystone-steel interface shear stress Reservoir Characterization normal stress Claystone claystone-steel interface shear test friction coefficient...

... condition shear stress normal stiffness direct shear testing machine normal stress strength envelope different normal stiffness normal stiffness condition initial normal stress Harmonising Rock Engineering and the Environment Qian & Zhou (eds) © 2012 Taylor & Francis Group, London, ISBN 978-0...

... equation approximation rock beam normal stress discontinuity friction angle panek Harmonising Rock Engineering and the Environment Qian & Zhou (eds) © 2012 Taylor & Francis Group, London, ISBN 978-0-415-80444-8 Simulation of laboratory tested bolted rock beams P. Yiouta-Mitra, N. Halakatevakis...

... strength of the small scale surface asperities. Reservoir Characterization strength particle tensile crack Upstream Oil & Gas normal stress rock fill shear box test Wellbore Design Rock mechanics discontinuity BK model basic friction angle reservoir geomechanics Barton porosity...

... stress surface height closure curve fracture Sakaguchi giwelli Harmonising Rock Engineering and the Environment Qian & Zhou (eds) © 2012 Taylor & Francis Group, London, ISBN 978-0-415-80444-8 Effects of fracture size and normal stress on the shear behavior of a fracture as estimated by mortar...

... Upstream Oil & Gas flow rate shear direction koyama perpendicular normal stress shear-flow test evolution transport simulation Simulation normal loading condition fluid flow rock fracture ABSTRACT The fluid flow and tracer transport in rock fractures during shear processes has been...

... shear strength considering 3 different normal stresses. The results indicated that the failure pattern and the failure mechanism were affected by the continuity configuration of the rock bridge. Furthermore, with the reduction in the continuity of the rock bridge in a fixed area, the shear resistance...