... in geometry. The failure mode of the joint specimen under compression-shear loading can be classified into four types: coplanar shear failure, shear failure along the joint plane, shear failure along the shear stress plane and similar integrity shear failure. The joint dip angle has a decisive effect...

... ABSTRACT: Removability of a block is defined as the block's ability to move along some direction without penetrating other blocks. All the possible directions form a vector set, defined as the removable domain, which reflects the constraints from the joint planes. A removable block must move...

... space and makes a clear visualization of the analysis process of Block Theory. geological modeling Upstream Oil & Gas Pyramid geologic modeling Wellbore Design typical visualization result reservoir geomechanics friction angle contour joint plane vector intersection joint pyramid...

... and the numerical modeling of the compression joint normal test, shows the accuracy of this new model. The second shortcoming occurs due to a lack of an updating procedure in the PFC software related to the contact conditions of the particles that lie around the intended joint plane during high shear displacements...

... theory joint plane Block Theory convex intersection joint pyramid Engineering removability intersection concave intersection algorithm finite non-convex block free plane plane finiteness sub convex block 1. INTRODUCTION In the process of excavation for rock engineering, a frequently...

... procedure for the SPH method which enables integrated simulation of pressure driven hydraulic fracture (HF) propagation, including consideration of natural fracture (NF) interaction. In this procedure, a NF plane or joint plane is approximated by straight line segments connected by a discrete set of joint...

... joint plane structural geology resistance dilation angle bolt angle compressive stress shear displacement Installation Condition grout passive bolt tensile stress 1. INTRODUCTION Shallow excavations through layered or laminated ground, including sedimentary rock and jointed rock units, can...

... reservoir geomechanics Upstream Oil & Gas failure mode strength experiment joint orientation numerical experiment Reservoir Characterization deformation modulus Wellbore Design rock bridge joint geometrical parameter joint plane persistency joint persistency non-persistent jointed rock...

... in porous media Artificial Intelligence aperture vertical distance displacement reservoir geomechanics Fluid Dynamics variation joint plane contour plane jointed rock mass permeability rock joint horizontal stress stress-flow analysis tunnel hydraulic conductivity periphery conductivity...

... values of the input parameters involved and thereby ignores the inherent variabilities of the parameters. In this study, the Monte Carlo simulation method is used to account for the frictional properties, described by the friction angle and cohesion of the joint planes defining a wedge in a slope...

... strength of impersistently jointed rock volumes when joints and intact rock are modeled as elastic-plastic media. INTRODUCTION Joint persistence refers to the percentage of a joint plane occupied by joint material; the remainder is occupied by intact rock bridges. Persistence ranges over the interval...

... square statistically joint plane rock mass inner block 1. THREE DIMENSIONAL JOINT SYSTEMS In order to form three dimensional block systems, three dimensional joint systems are needed. The geometric information of joints is often represented by a geological map or joint map. Joint maps are joint...

... component. Joint geometry configuration was also observed to control the mode of failure of the jointed blocks and three modes of failure were identified, namely (a) tensile splitting through the intact material, (b) either only shear failure along the joint planes or both shear and tensile failure...

... Vegas, Nev., USA ABSTRACT: An intensive sensitivity est was made on the block size distribution for various rock joint parameters, specially for the orientation of joint planes and their statistical models. The shape of block size dism mtions was altered drastically when the concentration factor...

... action which transfers load to the joint plane. Simulation of the passive rockbolt action was also performed using the same mesh (Fig. 2), and only the load from the body weight of rock mass was considered. The tensional bolt axial stress (Fig. 4a) becomes the maximum at the rockbolt segment intersecting...

.... This eliminates the conventional need for discretizing the joint plane into elements as in finite element and finite difference methods. Furthermore, preferential flow paths can be determined in a more rigorous manner without the need for grid refinement to obtain accurate velocity distributions...

... elastic property anisotropic rock mass deformation rock mass joint plane Amadei determination circumference expansion test equation Rock Mechanics as a Multidisctplinary Science, Roegiers (ed ) ¸ 1991 Balkema, Rotterdam. ISBN90 6191 194 X Determination of the elastic properties of anisotropic...

.... Therefore, a large number of curved joint traces can be computed. unrolled joint trace map joint trace vector joint trace map primary loop removable block joint plane forward direction clockwise maximum key block intersection point maximum removable area removable area tunnel surface...

... equipment room, and maintenance rooms. Upstream Oil & Gas passenger transportation resistance Reservoir Characterization Rock Structure north wall discontinuity excavation plane stability rock anchor contingency planning wedge intersection excavation support system joint plane...

... and the anisotropy of the applied state of stress. Compared to intact rock, jointed rock is directional in its response to loading or unloading with reduced shear strength along the joint planes and vanishing or small tensile strength in a direction normal to the joint planes. Analytical models that describe...