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Keywords: excavation
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Proceedings Papers

Paper presented at the 54th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2020
Paper Number: ARMA-2020-1712
... metals & mining ramp rehab convergence reservoir geomechanics upstream oil & gas displacement failure zone rmr rock mass strength development drift shotcrete excavation turquoise ridge inflatable bolt reservoir characterization extensometer maximum failure zone mesh...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0016
... reservoir geomechanics Rock mechanics mining drive Reservoir Characterization Upstream Oil & Gas mechanism compression test stress concentration rockburst metals & mining quartzite international journal investigation Orebody specimen excavation pillar footwall quartzite tangent...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0022
... metals & mining criterion tendency Upstream Oil & Gas shaft station pillar reservoir geomechanics rockburst criteria Reservoir Characterization strength excavation longwall panel station area pillarburst proneness case study brittleness coefficient numerical model system...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0037
... ABSTRACT: In this study, bump potential in the vicinity of a fault zone associated with a longwall mining excavation is evaluated with respect to the different stages of shear strain in the normal fault through the use of a numerical modeling technique. The influence of stored and dissipated...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0350
... support properties and installation time with respect to opening development. In comparing the GRCs and the SRCs for different support systems, one can evaluate the effectiveness of installed support system in maintaining the integrity of the excavated area(s). This paper presents a preliminary...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0301
... in a repository. In this study, rectangle, triangular and trapezoidal cutoff shapes for drift sealing are numerically modeled. The extent of the excavation damaged zone in crystalline rock is predicated for changes in the shape and size of these cutoffs. The excavation damaged zone dimensions are...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0429
... ABSTRACT: Rock bolt is one of the major support systems of tunnel engineering. It is used to stabilize suspended rock blocks around an excavation section, reinforce rock mass, and reduce displacement along rock joints. This study proposed a rock bolt model, which includes two parts: a bolt...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0471
... ABSTRACT: This paper presents a comprehensive investigation regarding rock mass stability of tunnels excavated in faulted zone. The investigation features a typical Chinese procedure that addresses the support design of large tunnels in difficult grounds. Site survey, mechanical tests...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1882
... ABSTRACT: Rockburst is characterised by a violent ejection of rock fragments from the free face of an underground excavation. This is a serious problem which can kill people, damage equipment and/or cause production loss. As mining operations are being taking place in deeper rock masses, the...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1917
... propagation anglogold ashanti minimum ppv serra grande accident vibration machine learning Upstream Oil & Gas cme excavation peak particle velocity maximum load unstable block wave attenuation 1. INTRODUCTION The vibrations caused by the drill and blats process are a matter of concern due...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1955
... ABSTRACT: The 1150 m deep man shaft at Boulby Mine in Yorkshire, UK was sunk between 1968 and 1974. At the 1056 m level in the Upper Halite, shortly after the excavation and close behind the shaft wall, several 4.5 m long multipoint extensometers were installed at various orientations to...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1951
... MPa stress ratio radial water jet drill diameter differential stress breakout excavation Reservoir Characterization hole-profile geometry nozzle in-situ stress strength borehole stability tangential stress stress field 1. INTRODUCTION Radial Water-jet Drilling (RJD) uses the power of...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2063
... ABSTRACT: This paper evaluates the stability of drives excavated in paste-filled stopes that have been previously mined out. Stability of the drives is important as the vibrations generated during the drilling and blasting processes affect the stability of the drives in low-strength paste...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0484
... coupled with representative Discrete Fracture Networks (DFN) has been proven to provide accurate models of the actual response of a rock mass undergoing excavation. However, considering the statistical nature of DFN's, multiple simulations need to be run in order to obtain statistically significant...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1583
... ABSTRACT: We developed a coupled THMC model that can describe the long-term evolution in hydraulic and mechanical properties of the rock masses such as permeability and stiffness due to geochemical reactions within rock fractures induced by cavity excavation. Using the developed model, long...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1634
... latter, weaker rock mass properties were assumed due to the localized effects of rock joints cutting through the intact zones between holes. Currently, the project is in its final stages of excavation. A review of the challenges during the construction stage is given, and the validity of the initial...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1636
... ABSTRACT: Rock bridges are sections of an intact rock along otherwise through-going discontinuities, and the rock bridges play an important role in the geotechnical stability of underground excavations, surface slopes of mines, dams, foundations and other earth retaining structures. Numerical...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1597
... high-profile project in a densely populated urban neighborhood with multiple stakeholders. The paper presents the sequential excavation method (SEM) for construction of the assembly chamber, the performance of the tunnel boring machine (TBM), and the encounter of a fracture zone during mining. A focus...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1629
... ABSTRACT: Ground control has been and continues to be a major problem facing underground mines around the world. Unplanned fall of ground (FoG) can lead to ore loss, accidents, fatalities and production delay. Hence, FoG is of critical importance to the design of underground mine excavations...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1682
... ABSTRACT: The design of a ground support system must be sufficiently robust to hold, retain, and reinforce the excavations throughout its service life. The operational, geological, and geomechanical properties of the surrounding rockmass are known to impact the short- and long-term behavior...

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