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Keywords: stability
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Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-575
... Abstract: Slope stability designs are largely dependent on rock mass and more specifically discontinuity characterization. Traditional discontinuity characterization methods (scanline and cell mapping) have many problems associated with time, safety, accuracy, and human bias. This study shows...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-565
... Artificial Intelligence reservoir depletion assumption Reservoir Characterization depletion Upstream Oil & Gas reservoir geomechanics pore pressure stability boundary perturbation reservoir boundary reverse fault fault inclination fault stability reservoir instability fault...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-618
... ABSTRACT: Analyzing the stability of the three-dimensional wedges created around underground excavations in rock masses is a common problem in rock engineering. Most existing algorithms for wedge failure analysis assume wedges to be in low stress environments. Under such conditions...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-492
... 1. INTRODUCTION Literature Review. Before presenting the proposed model, the authors would like to focus on the previous models which have been studied mainly in recent years, with concentration on well-bore stability in shaly formations. Our proposed model will also be explained in more detail...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-454
... for hole stability analysis are incapable of accurately predicting the volume of failed rock. Rather these methods predict the onset of rock failure and thus the completion design errs on the side of safety. This paper summarizes an R&D study that arose from a challenge by one of Norsk Hydro s Offshore...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-581
... reservoir geomechanics external stress specimen concentration experiment elliptical breakout Upstream Oil & Gas hole failure higher external stress stability breakout depth Reservoir Characterization circular hole sandstone hollow cylinder geometry breakout breakout tip...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-467
...1. INTRODUCTION It has been demonstrated that thermal effects can be very important to both wellbore stability and injection design (Guenot and Santarelli, 1989 [1]; Paige and Murray, 1994 [2]; Charlez, 1997 [3 Formation temperature and formation pore pressure are fully-coupled for fluid flow...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-457
...1. INTRODUCTION Wellbore stability analysis has been the subject of study and discussion for a long time. The integrity of the wellbore plays an important role in many well operations during drilling, completion, and production. Problems involving wellbore stability occur principally through...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-0491
... data. The rock mass strength for fresh and hydrothermally altered rock was calculated for lava flow, dome and pyroclastic litholigies. Volcano modeling utilizing the distinct element method (UDEC) and the limit equilibrium technique, was used to assess stability and deformation of the edifice. Modeling...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-0497
... ABSTRACT ABSTRACT: Stability of some rock slopes is often influenced by heavy rain during summer in Korea. One of the main process involved in this, is the slaking of highly weathered rock. Such change of engineering behavior due to slaking can not be easily detected by the measurement...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-0473
... ABSTRACT ABSTRACT: Evaluation of the long-term surface stability of crown pillars overlying underground mines is an important component of mine closure planning. The definition of a crown pillar, as well as a brief discussion of the assessment of the probability and consequence of crown pillar...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-0919
... ABSTRACT ABSTRACT: An equivalent properties approach to time-dependent behavior of jointed rock masses is applied to the important problem of mine slope stability. A non-representative volume element ( NRVE ) approximation accounts for joints without explicit representation and makes...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-1279
... ABSTRACT ABSTRACT: Two-dimensional and three-dimensional DEM programs, UDEC and 3DEC, were used to investigate the mechanical stability of the conceptual design of deposition drift and deposition holes constructed in a crystalline rock mass. From the simulations, the influence...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-0967
... ABSTRACT ABSTRACT: This paper summarises the results of numerical studies on drift stability in moderately jointed rock masses. It investigates the relative pertinence of joint orientation, spacing, stress regime, etc. This is undertaken using a distinct element model and a series...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-0481
... dominant ground or in situations where the ground has been previously damaged by high stress. Such relaxation is often neglected in limit equilibrium calculations and in empirical design techniques. The stability of hanging walls in open stopes is of particular concern with respect to the detrimental...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-0261
... ABSTRACT ABSTRACT: Stress and pore pressure variations due to the introduction of multilaterals from a main well bore are analyzed herein. Wellbore stability for multilateral junctions are increasingly becoming the oil and gas industry's concerns, and the placement of the multi-laterals...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-0147
... Characterization drilling fluids and materials wellbore stability pore pressure shale stability pressure difference pore pressure change fluid pressure van Oort permeability Pore Fluid interaction surface area test fluid membrane efficiency Pacific Rocks 2000, Girard, Liebman, Breeds & Doe (eds...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-0531
... ABSTRACT ABSTRACT: Many inactive rock quarries are deep, abandoned, water-filled pits with near-vertical walls. Reclaiming a quarry site or investigating a quarry bottom may require draining the quarry. However, rapid drawdown of the quarry water level may reduce the stability of the quarry...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-0539
... ABSTRACT ABSTRACT: A computer analysis of bench stability has been developed to account for multiple occurrences of potential slope-failure modes in discontinuous rock masses. Bench-scale plane shears and tetrahedral wedges are simulated and stochastically analyzed to estimate the probability...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-0619
... guide in the construction of the tunnels in heavily fractured rock mass. Upstream Oil & Gas tunnel support excavation support system numerical analysis stability tunnel roof steel pipe Reservoir Characterization shallow tunnel mechanical property Invert injection material...

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