Papers

Applications of hydro-mechanically coupled 3D mine and reservoir scale, discontinuous, strain-softening dilatant models with damage

on Jul 23, 2015 in Downloads, Papers

Flatten, A., Beck, D. Copyright 2015 ARMA, American Rock Mechanics Association In gas and oil as well as in several mining applications hydro-mechanical phenomena play an important role and need to be considered in numerical models for calibration and forecasting analyses. In this paper, a two-way coupled hydromechanical formulation is described and applied to real size, complex 3D mining and reservoir model examples including structures using the Finite-Element Method (FEM) framework. The proposed coupling considers increasing hydraulic conductivities due to the evolution of rock mass damage...

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Numerical simulation of the released energy in strain-softening rock materials and its application in estimating seismic hazards in mines

on Jun 16, 2015 in Downloads, Papers

Numerical simulation of the released energy in strain-softening rock materials and its application in estimating seismic hazards in mines

Vladislav Levkovitch, David Beck, Frederik Reusch Beck Engineering, (Germany and Australia) This paper describes the use of Rate of Energy Release (RER) to assess the likelihood of mining induced seismic events. We describe a computational framework for simulating RER, the expected and confirmed correlation with induced seismic events and present some example results from mines. [Download]

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A preliminary, calibrated scheme for estimating rock mass properties

on Sep 2, 2013 in Downloads, Papers

A preliminary, calibrated scheme for estimating rock mass properties

D.A. Beck and C.R. Lilley Beck Engineering Pty Ltd. Sydney Australia F. Reusch, V. Levkovitch, G. Putzar and A. Flatten Beck Engineering. Berlin, Germany Calibration of 3D, discontinuum, strain softening, dilatant (SSD) models of mines often yields different rock mass scale (representative elementary volume, or REV) properties to empirical methods. In this paper, some steps towards a calibrated empirical scheme for estimating material properties for some types of 3d, discontinuum non-linear models targeting larger than (REV) scale phenomena are described. The scheme uses typical pre-mining...

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Coal Seam Gas, induced earthquakes and underground water

on Sep 30, 2012 in Downloads, Papers

Coal Seam Gas, induced earthquakes and underground water

D.Beck, Beck Engineering Pty Ltd, Sydney, Australia Australia relies on coal for base-load electricity, but cleaner energy sources are being added to the mix to pursue longer-term emission reduction targets. Coal seam gas (CSG) and other gas-generated electricity sources are intermediate steps towards the goal of lower emissions – they are cleaner than coal, and can compete in the current energy market. Viable, cleaner energy sources, such as CSG that are compatible with existing energy infrastructure should also help build the renewable energy market. Download...

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Mine to tunnel scale discontinuum simulation of repeated dynamic loading of mine excavations

on Jun 12, 2012 in Downloads, Papers

Mine to tunnel scale discontinuum simulation of repeated dynamic loading of mine excavations

Beck, D. Beck Engineering David Gilbert and Kevin Stacey Compañía Minera Antamina S.A. Peru Underground excavations are subjected to complex stress changes caused by nearby mining, but may also be affected by repeated dynamic loading from blasting and seismic events. In some cases, the combined, cumulative effects can lead to unforeseen damage, displacement and instability. Simulating dynamic loading of an underground excavation is a very complex task. The state of rock mass stress, damage and deformation must first be simulated sufficiently requiring small scale structures to be explicitly...

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