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Keywords: rockmass
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Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0298
... Canadian deep mines, coupled with site-specific field observations, is employed to justify the support design for large-span intersection developments with a focus on mitigating dynamic loading hazards. Artificial Intelligence Reservoir Characterization rockfall rockmass hazard intersection...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2163
.... Specific attention is given to methods for characterizing crown rockmasses to account for major geological structures that historically have led to adverse deformation behaviour, and in some cases to failures. 1. INTRODUCTION Although the empirical Scaled Span method for surface crown pillar stability...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-681
... rockmass production rate sengani mining 1. INTRODUCTION The previous study by Toper (2003) has reported that South Africa is considered to be one of the biggest gold producers in the world, with most of the gold mines located within the geological setting of the Witwatersrand basin. His further study...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-267
... tunnel rockmass data collection application integration Diederich natural discontinuity Rock Mech ABSTRACT: In this study, a step-by-step methodology on how to simulate sparsely to moderately fractured, highly interlocked rockmasses is demonstrated, depicting the necessary steps from the...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-730
.... reservoir geomechanics backfilled stope mechanism agioutantis Reservoir Characterization stope metals & mining rockmass Engineering operation excavation falaknaz backfill material geometry rock mass Newman stress distribution Rock mechanics geomechanics Symposium Upstream Oil & Gas...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-126
... shaft geometry reduced the equilibrium ground displacements of the rockmass by nearly an order of magnitude and allowed continued shaft sinking without further liner failure. This paper documents the challenges associated with the #4 Shaft project from a rock mechanics perspective and provides an...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0537
... ABSTRACT: Pit slope failure can have devastating effects on safety of personnel and equipment, and affect profitability of mining operations. Discontinuities, groundwater, rockmass strength and pit geometry can cause slope failure. Also, mining activities (such as drilling and blasting) can...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-525
... rockmass over time, especially when looking at seismic event clusters. This paper presents results from the seismic deformation method and stress inversion analysis applied to seismic clusters from monitoring systems installed in two hard rock mines in Ontario Canada. Seismic deformation projected on a...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-257
... plunges southwest. The bulk of the economically viable portion of the deposit is highly jointed and rockmass quality is in the order of 35 - 55 (RMR76, Bieniawski), placing it in a poor to fair classification category. The case study presented here focuses on a single strike drive ("G") located on the...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-374
... development blasts can be used to quickly evaluate source location accuracy and infer the state of rockmass conditions are given. Examples are given as to how network sensitivity can enhance the understanding of the rockmass response to mining are also presented and a case is made for 3D velocity models and...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-638
... underground mining method and it enables large production rates. Despite the trend towards block cave mining, the method still faces several challenges. Improved understanding of how a rockmass responds to caving will lead to safer, more predictable and more productive cave mining operations. Combining large...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-855
... potential development of additional flow paths and affects the fluid pressure distribution, which, in turn, affects the mechanical response via the effective stress concept. The mechanical framework uses a strain-softening, dilatant and discontinuum constitutive model for both bulk rockmass and structures...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-839
... attain since the openings are constantly subjected to bending moments and stress redistribution. The rockmass examples from this paper can be considered as ‘‘mobile ground’’ where the combination of high ground stresses and a weak rock mass lead to the onset of closure soon after the opening has been...
Proceedings Papers

Paper presented at the 48th U.S. Rock Mechanics/Geomechanics Symposium, June 1–4, 2014
Paper Number: ARMA-2014-7348
... fluid modeling hydraulic fracturing fracture size Reservoir Characterization fracture characterization strength machine learning equation of state Engineering rockmass classification tool classification system variability geometry size distribution block size Artificial...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-459
..., a greater understanding of system performance can be obtained. This includes greater knowledge about the range of possible failure mechanisms and the variability in rockmass strength. This paper discusses challenges associated with evaluating uncertainty in intact and rockmass parameters for Hoek...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-501
... fracturing mapping surface size distribution average trace length discontinuity mapping window rockmass plane Artificial Intelligence frequency exponential distribution fracture network discrete fracture network trace length rock mass fracture realization block size distribution total...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-288
... Abstract: The influence of tunnel shape on rockburst manifestation is analyzed in FLAC 3D using several indicators including velocity and acceleration within the finite difference method. The tunnel is constructed in a rockmass defined by a Mohr-Coulomb strain-hardening/-softening...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-377
... Artificial Intelligence displacement anhydrite vein metals & mining calcite vein rockmass Reservoir Characterization Upstream Oil & Gas hoek-brown curve direct shear test reservoir geomechanics strength normal stress GSI value MPa Continuum vein intrablock structure...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-374
... Abstract: In underground projects time-dependent deformations can occur and subside during the construction process or continue over a long period of time. The nature and impact of time-dependent behavior is related in part to the particular combination of rockmass mechanical properties, in...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-412
... ABSTRACT: This paper addresses the challenges associated with using fully grouted rock bolts in shallow to moderate depth underground cavern design in laminated ground. Laminations in a rockmass have the capacity of being either an asset or challenge to a cavern design. If supported adequately...

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