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Keywords: dynamic loading
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Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0502
... ABSTRACT: The understanding of the grout deformation and failure process and the use of appropriate constitutive models are the basis to predict the behavior of grouted threadbar, commonly used in Chilean mining as reinforcement in underground excavations during dynamic loading. Based...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1641
... loading DIT dynamic loading trolley dynamic ground support 1. INTRODUCTION As underground mines are going deeper, the stresses in the rock mass are approaching, and in some cases exceeding the strength of the rock mass. Supporting excavations in this type of ground comes with a unique set...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-735
... energy. Mining rate influences the rate at which overburden strata are loaded. Because longwall mining has a relatively fast: rate of extraction, an analysis of energy transformation within strata that are subjected to dynamic loading is an important consideration. For overburden strata...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-394
... Characterization US government frequency mechanism Surface Support modeling PPV machine learning Upstream Oil & Gas seismic wave dynamic loading unsupported excavation rockburst loading support system ejection fracture Artificial Intelligence seismic loading rockbolt excavation Energy...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-308
... Abstract Understanding fragmentation behaviour of rock under crushing process is fundamental to improved productivity and efficiency in mining operations. During crushing, rock is subjected to dynamic loading and the particle shape influent the fragmentation of crushed rock. Thus, a highly...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-229
... on dynamic crack propagation and coalescence. At last, blasting effect on a 3D volume has also been investigated. This study can be useful to provide better understanding of the failure of rock under dynamic loading with discontinuity or heterogeneity. 1. INTRODUCTION Crack propagation and coalescence...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-382
... of dynamic loading on the safety factor in case of a possible earthquake. The present study shows that most parts of the southern wall will be unstable if it is subjected to an earthquake similar to the ones that have been recorded in the region’s history. 1. INTRODUCTION The earthquake triggers failure...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-338
... fracture performance under the high strain rate conditions, rock-like artificially moulded gypsum specimens with and without pre-existing flaw(s) are loaded under different strain rates. A quasi-static loading is applied to the specimens by a uniaxial compression machine. The dynamic loading is produced...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-158
... ABSTRACT: In this paper, the impact dynamics of rock bolts with passive friction control is modeled and analyzed. Numerical investigations are performed for the rock bolts with a frictional energy absorber, exemplified by the Roofex bolt of Atlas Copco, under various dynamic loadings...
Proceedings Papers

Paper presented at the Golden Rocks 2006, The 41st U.S. Symposium on Rock Mechanics (USRMS), June 17–21, 2006
Paper Number: ARMA-06-1078
... underground structure LDEC Cundall fracture livermore national laboratory Morris loading jointed rock Continuum Reservoir Characterization Simulation application Upstream Oil & Gas particle hydrodynamic tetrahedral element particle deformation dynamic loading rock mass...
Proceedings Papers

Paper presented at the Golden Rocks 2006, The 41st U.S. Symposium on Rock Mechanics (USRMS), June 17–21, 2006
Paper Number: ARMA-06-942
... ABSTRACT ABSTRACT: The need for ground support that is resistant to dynamic loading becomes increasingly important as mines create excavations within higher rock stresses at greater depths. Previous impact load testing has been used to qualitatively assess the performance of different surface...
Proceedings Papers

Paper presented at the Vail Rocks 1999, The 37th U.S. Symposium on Rock Mechanics (USRMS), June 7–9, 1999
Paper Number: ARMA-99-0325
... according to the Short Rod (SR) specimen suggested by ISRM. The experimental results showed that under the dynamic loading condition the fracture toughness of both the gabbro and the marble increased with increasing loading rates. This relationship between fracture toughness and loading rates is fairly...
Proceedings Papers

Paper presented at the The 30th U.S. Symposium on Rock Mechanics (USRMS), June 19–22, 1989
Paper Number: ARMA-89-0005
... and Board (1988), based on the conceptual model of reinforcement presented by St.John and Van Dillen (1983). reservoir geomechanics displacement Rock mechanics metals & mining strength resistance Reservoir Characterization Upstream Oil & Gas Simulation dynamic loading loading...
Proceedings Papers

Paper presented at the The 24th U.S. Symposium on Rock Mechanics (USRMS), June 20–23, 1983
Paper Number: ARMA-83-0163
... water pressure increases and the effective stress decreases during dynamic loading (Seed, 1976; Finn, 1981; Silver, 1981). Numerous foundation failures and liquefaction events in soils have been documented in the literature (Seed, 1976). Motivated by these catastrophic failures, research needs in soil...

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