... the combined action of normal stress, joint roughness, shear rate, and cyclic shear number are studied. The results show that the normal stress and the roughness are positively related to the cyclic shear strength of the rock joint. With the increase of shear rate and number of cycles, the shear strength...

... presented strain softening, where the interface strength decreased after reaching the peak value to a stable residual strength. On the contrary, strain softening was unlikely to be discovered directly on the shear test. The material impacts and roughness on the soil-structure interface and the shear...

... Abstract Size effect on surface roughness is critical in characterizing the permeable property of rock facture. Based on the three-dimensional morphology of the fracture surface scanning in the field, the size effect on the fracture surface roughness and permeability were investigated. First...

... created discontinuity models with various roughnesses and connectors with various angles using 3D printing technology. Therefore, we can control the variables in the scanning. Several open-source packages were employed to obtain the information from the point cloud acquired by TLS. The result shows...

... in three dimensions (FLAC3D), and the shear behavior was numerically analyzed. According to the experimental and numerical simulation results, joint roughness and normal force are the two most important factors that influence the shear behavior. The peak shear force increased as the normal load and joint...

... fluid modeling equation of state hydraulic fracturing Upstream Oil & Gas Modeling & Simulation neural network roughness fracture network discrete fracture network heterogeneous aperture distribution aperture heterogeneity fluid flow DFN model isrm international symposium...

... Abstract This paper describes the measurement and analysis of the roughness of natural rock joints with the aim of proceeding to their characterisation and comparison. Eight rock joints (corresponding to sixteen surfaces) were scanned with a three-dimensional scanner. This was followed...

... Abstract The rock fractures usually consist of surfaces with different orders or scales of roughness, which have critical effects on the fluid flow behavior inside the fractures. In this paper, a two dimensional representative single rock fracture model was built, based on a laser scanned data...

... ABSTRACT Mechanical behavior prediction of rock joints is very important in the rock mechanics. Many models have been proposed to predict the mechanical behavior of joints at which lack of correct evaluation of effective roughness coefficient has been the most important shortage...

... ABSTRACT Roughness of rock joint surfaces is known to be one of the most significant factors to determine the shear strength of joint surfaces, and it has been widely investigated in various ways. A recent research on roughness quantification of rock joints revealed that various 3-dimensional...

... ABSTRACT Both mechanical and hydraulic behaviors of rock joints are closely dependent on joint aperture. Understanding how fracture wall-roughness affects fluid flow is important when modeling many subsurface problems. In this paper, a new evaluation method of joint hydraulic aperture using surface...

... Reservoir Characterization roughness empirical criterion rock joint infilled joint rational function ISRM International Symposium 2008 5th Asian Rock Mechanics Symposium (ARMS5), 24-26 November 2008 Tehran, Iran 543 A NEW EMPIRICAL CRITERION FOR PREDICTION OF THE SHEAR STRENGTH OF NATURAL INFILLED...

.... Particles were generated and bonded into a 10x2x3.6 cm3 block, and a rough joint with a JRC value of 10–20 was produced by defining the joint-contacts along a predefined joint surface. The bond strength between the particles with joint-contacts was reduced by up to 70 percent in order to simulate...

... but similar strike and dip direction, even with a dip direction rose diagram. Another example is two joint sets with similar dip and dip direction but different roughness, causing different effects in wall stability. Such joint sets cannot be separated with rose diagram or stereonet either, because the rose...

... of automatically generating a 3D rough joint surface. This paper proposes a method to generate the 3D joint surface using Laminated Object Manufacturing (LOM) technology [5]. This method can produce a 3D mother surface with a given surface geometry. The ability of generating two joint surfaces with the same...

... ABSTRACT Most hydraulic aperture studies are based on rectangular flow system with linear shearing. This study investigates the influence of joint surface roughness on the hydraulic behavior, in the curved shearing surface or a circular joint. The most unique part of the investigation...

... Reservoir Characterization reservoir geomechanics displacement aperture Upstream Oil & Gas strength mechanism rotation roughness dilation interpretation Magnitude Barton compliance JRC stiffness shear strength anisotropy normal stress shear stress fracture permeability...

... ABSTRACT The paper provides summaries of recent developments on rock joint roughness, rock joint strength and deformability, and rock mass strength and deformability based on six journal papers the author published recently with his graduate and undergraduate st 1. Summary of References 1...

... are obtained through brazilian tests. Besides, the reverse scale effects are much commoner than the above cited arguments suggest. Houpert (1970) and Jackson. Reservoir Characterization scale effect Rotterdam amplitude rock mass Upstream Oil & Gas roughness middle plane Hierarchy granite...