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Keywords: rockmass
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Proceedings Papers

Paper presented at the 57th U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2023
Paper Number: ARMA-2023-0073
... ABSTRACT Field-scale rock formations (i.e. rockmasses) are composed of sections of intact rock separated by a preexisting joint network. As rockmass deforms, strain accumulates within the intact rock and slip occurs along the preexisting joints. However, the magnitude of strain within...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1205
... are introduced numerically by using Discrete Fracture Network (DFN) elements and Ubiquitous mechanical model. Two approaches are adopted to compare the initial stresses, the first approach is based on using the 3D stress gradient in a continuum rockmass without implementing the effect of discontinuities...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0298
... for 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-2018-126
... in 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...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-267
... 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 discontinuity data collection stage to the rockmass scale numerical modelling. For this purpose...
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-2018-681
... 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 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
... in the 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...
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...
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
... constitutive model for both bulk rockmass and structures such as faults on a regional scale and discrete fracture networks (DFN). are given in terms of (total) Cauchy stresses , bulk mass density and volumetric forces . Eq.(1) is defined in the deformed domain configuration. As strain rate measure, the rate...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-839
... 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 created. Attempts at preventing...
Proceedings Papers

Paper presented at the 48th U.S. Rock Mechanics/Geomechanics Symposium, June 1–4, 2014
Paper Number: ARMA-2014-7348
... Abstract Block size estimation is required to optimize support design, to estimate volumes for rockfall catchment systems, and is an integral part of many rockmass classification systems. The most common problem with existing methods used to determine block size is that a single...
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-Brown...
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-2013-377
... Abstract: The overall strength of a rockmass, as determined by traditional rockmass characterization methods, typically involves an assessment of the intact rock strength and rockmass structure. This paper investigates a variety of approaches to account for the effect of 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...

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