... a longer stress wavelength to overcome the relatively shorter duration of the stress waves in the SHPB system. The dynamic shear test on the jointed rock samples using the bar drop apparatus also provided the information to estimate the rock joint shear strengths. 1. INTRODUCTION The rock structures...

... masses. For slope stability, the shear strength of the rock activated along the slip surface can be obtained by solving Eq. (1) to Eq. (4) (Hoek et al. 2018). case 2 excavation rocscience inc proc reservoir characterization disturbance factor distribution function upstream oil & gas...

... 3DEC modeling software. After the completion of the direct shear test simulations, a shear strength of the fault plane was estimated by back calculation. The DFNs with subhorizontal/vertical dip angles created an imbricate structure that resulted in a stepped geometry and strong shear response...

... thickness shear strength tokashiki upstream oil & gas reservoir characterization characteristic engineering penetration index bulletin classification rock mechanic ARMA 22 0211 Some attempts on Characterization and Evaluation of Properties of Fracture/Shear Zones Aydan, Ö. University...

... as such is uncommon. The main property of a discontinuity is its shear strength. The shear strength has frictional parameters, such as basic friction angle and roughness, and may have a cohesion parameter. In this work, we evaluated the mechanical properties of artificial mechanical discontinuities. The artificial...

... characterization bieniawski shear strength tunnel stability himalaya wellbore design larger span overhanging cliff constructed strength upstream oil & gas span classification engineering assessment safety figure 6 modeling ARMA 22 0534 Design of Larger Span Overhanging Cliffs Constructed...

... displacement tensile strength embedment plane bedding rutqvist shale-indentation experiment imaged shear strength fracturing fluid reservoir geomechanics modeling anisotropy synchrotron x-ray micro-tomography rutqvist evolution aperture micromechanical modeling ARMA 22 557 Micromechanical...

... stress on a fracture exceeds its shear strength, shear displacement may occur that opens apertures, e.g. propping of openings by asperities. This results in increased fracture transmissivity. This is most likely to occur periodically on fractures close to being critically stressed in response to natural...

... orientation insufficiently compressive strength cwt transducer thickness switzerland shear strength information reservoir geomechanics strength shale unpreserved shale rock mechanic association mont terri ARMA 22 683 The hidden value of insufficiently preserved shale material Stroisz, A.M...

... resistance of the shale prevent such closure. Electro-osmosis has traditionally been applied to clay to either increase or reduce the shear strength. Here, we conducted laboratory tests to demonstrate the weakening effect of electro-osmosis to enhance barrier formation. Outcropping Eocene clay was sampled...

... ABSTRACT: The shear strength of coal cleats is a key input parameter for many engineering aspects of coal seam gas extraction, such as the selection of the equivalent circulating density (ECD) for drilling and the analysis of borehole stability. The focus of existing studies has been...

... ABSTRACT: Sandia National Laboratories and RESPEC personnel designed an experiment to establish a plausible lower bound of the shear strengths of clay seams at the Waste Isolation Pilot Plant (WIPP). Artificial clay seams were prepared from brine mixed with bentonite and applied between salt...

... on mechanical parameters could be obtained, which would be vital references for ultra-deep sandstone reservoir development. Rock mechanical properties such as uniaxial compressive, triaxial compressive, Brazilian tensile, shear strength, and brittle index were acquired. Variation laws were studied...

..., fracture toughness and the compressive strength of the rocks. At present, Mohr-Coulomb criteria are used to characterize the failure of the rocks and it overestimates the tensile strength and has no limit on the maximum shear strength tolerance for the rocks. The new Vipulanandan failure model...

... on to acquire variation laws of mechanical parameters such as triaxial compressive strength, tensile strength, shear strength, internal friction angle, cohesion strength, elastic modulus, Poisson s ratio, brittleness index, and failure modes versus depth. The results revealed significant differences between...

... & gas oscillation experiment shear experiment stress drop reservoir characterization piston pdc mode instability shear strength roughness slip rate displacement rate displacement control mode displacement normal stress bdc mode friction coefficient control mode machine stiffness...

... friction angle seawater bond strength atm diameter shear strength bentonite plug freshwater pressure test interface Abstract Bentonite has been identified as a cost-efficient and durable solution for alternative plugging options in shallow wells due to its ductile, self-healing...

... for surface roughness estimation. Ultimately, the strengths predicted based on these roughness values were compared to results obtained from constant normal load direct shear laboratory testing. Calculated peak shear strength values were found to have typical root-mean-squared errors on the order of 0.05-0.10...

... displacement support method experimental study Anchor high-tensile wire mesh diagram plant root tecco high-tensile wire mesh shear strength deformation 1. INTRODUCTION JinChuan Nickel Mine, the largest nickel base in China, has been depleted of rich ore resources. The mining scale of poor ore...

... to be tested at multiple confinement stages and for the full intact rock strength curve to be determined for each sample, including the shape of the curve at small confinements. The residual intact rock shear strength was also tested in stages at the end of the tests. Such a variety of tests on one sample...