... ABSTRACT Geological discontinuities have a large impact on the rock mass behavior in underground excavations. Under low stress conditions, structurally controlled wedge failure is one of the most critical types of rock instability. The stability analysis, in this case, is essential to consider...

.... metals & mining complex reservoir reservoir geomechanics upstream oil & gas stability analysis reservoir characterization equation of state cavern hydraulic fracturing orientation wedge golder associate fracman dfn unwedge dfn approach fracture discontinuity support design...

.... The approach is built on the use of a fully three-dimensional discrete fracture network (DFN) model to identify potential rock wedges, and hybrid discrete/continuum approach to assess the shear and normal effective stresses on the natural and (potentially) induced fractures that define those wedges...

... the intersection supports a wedge wave and that these wedge waves are coupled through the points of contact along an intersection. In this paper, we demonstrate the use of group theory to predict the number of vibrational modes supported by a fracture intersection. Five predicted vibrational modes are supported...

... plaster blocks, referred to herein as Block #1 and Block #2. As shown on Fig. 1 and Fig. 2, a physical model consists of two pieces: the block assembly and a tilt table. Fig. 1. Design of Physical Model Fig. 2. Completed Tilt Table The block assembly consisted of the plaster wedge block, a supporting...

... metals & mining relation reservoir simulation Reservoir Characterization Modeling & Simulation Upstream Oil & Gas displacement mechanism rock slope slope failure high rock slope axis stead slope damage ellipsoid geometry failure kinematic intensity wedge...

... & Gas reservoir geomechanics reinforcement slope reinforcement spillway Rock mechanics Consideration joint orientation control structure slope inclination strength rock slope excavation approach wall Reservoir Characterization orientation wedge geometry probabilistic analysis approach...

... rock joint orientation joint orientation mean orientation rock block Kent distribution drilling operation management wedge intersection Goodness Upstream Oil & Gas dispersion discontinuity plane Fisher distribution probabilistic analysis tetrahedral rock block excavation probability...

... bench scale instabilities. Back break analysis using cumulative frequency analysis and stochastic simulations of discontinuities properties such as orientation and dips were conducted to analyze the likelihood for plane shear and wedge type failures to occur for given bench face configurations...

... bridges and brittle fracture processes. In the first part of this study, the 3D lattice spring code Slope Model allows evaluation of the effect of rock bridges on the stability of a pentahedral or non-daylighting wedge. The geometry adopted simulates a 3D equivalent of a conventional 2D bi-planar wedge...

... rock bolts and hard rock masses subjected to changes in stresses induced by mining. During the test a large rock wedge was observed in the footwall side of the drift. Borehole extensometers, distometers, telescopic tube extensometers and rockbolts with strain gauges recorded the movement of the rock...

... for planar, wedge, and toppling failures. The excavation work illustrates the real-world and practical aspects of implementing temporary rock support measures at the foundation of a prominent structure. This paper emphasizes the engineering issues from the contractor s point of view for temporary support...

... recalls and contrasted two above mentioned definitions for the safety factor of a symmetric 2D triangular wedge formed in the roof of a circular tunnel. In Sections 3 and 4, the effects of shear strength of the fractures and in situ stress conditions on stability of the wedge are investigated...

... has led to wedge failures in the past. All visible faults were mapped and recorded in the mine data base. Additionally, in order to conduct the rock mass rating, GSI and RMR values of the main geotechnical domains were determined at various locations and elevations within the west wall. The recorded...

... Reservoir Characterization modeling overburden in-situ stress modeling wedge evolution salt-based gravity deformation numerical modeling Upstream Oil & Gas viscous substrate gravity salt pinch-out structural geology fold-and-thrust belt physical model passive margin...

... reservoir simulation risk management wedge variation FRICTIONAL property lognormal distribution joint plane coefficient safety margin variability plane realization Artificial Intelligence reliability index friction angle reliability estimation cohesion intersection probability...

... ABSTRACT: This paper describes the extension of conventional wedge stability analysis techniques for slopes and underground excavations using Discrete Fracture Network (DFN) methods. DFN wedge analysis utilizes the same sets of kinematic equations as conventional wedge stability analyses...

... ABSTRACT: This paper addresses issues associated with the analysis of rock slopes susceptible to wedge failure. It relies on two case studies to review the state-of- the-art in the use of kinematic, deterministic and probabilistic limit equilibrium methods. Furthermore, it presents a more...

... and Australia. Decoupling of a significant length of the strand from the cement grout to allow for large displacement of the reinforc ement element means the system is effectively a point anchored system. Consequently, for cable bolts the performance of the barrel and wedge anchor becomes critical to achieve...

... ABSTRACT: This paper presents a methodology to investigate the structural stability of ventilation raises in jointed rock. Structural data are used to generate fracture systems and limit equilibrium techniques are employed to determine the stability of all wedges formed along the walls...