.... The damage variable to define the damage evolution law was determined using back analysis. A parametric study was carried out with different values of the damage variable and the results obtained were compared against the experimental result. Finally, a three-dimensional numerical model was developed using...

... Abstract In this paper, a numerical investigation of uniaxial compressive tests on prismatic specimens with single cylindrical pre-existing cavities in brittle rock is performed. To investigate the rock fracture around cavities and to assess the potential of the numerical model to simulate...

... wave propagation, a field rock blasting test is conducted and the ground vibration is carefully monitored. To better understand the phenomenon, a numerical model considering the field geological features is established using the finite difference method. The field test results are then used...

... numerical model in this paper uses Mohr-Coulomb shear strength criterion with parameters of cohesion, friction, and tensile strength as tested in the laboratory. Artificial rock samples with 75 bridge angle were tested in the laboratory under uniaxial loading until failure. Curvilinear cracks (wing crack...

... are presently available for acquisition and visualization of discontinuity data and rock mass characterization, including advanced methods for surface and underground monitoring, it is stated that numerical models, when calibrated with real data, can be used as forward prediction tools during excavation...

...-scale model results, the fundamental energy transfer concepts asso- ciated with various mechanisms of instability are verified in a series of numerical models. Procedures are described to match the expected release of energy from analytical and theoretical calculations with the results of the numerical...

...-D and 3-D numerical models of underground quarries to clarify the fundamental response of underground quarries during shaking. The results show that there is slight discrepancy between the field measurement and the analyses. The authors discuss the reason for such a discrepancy. 1 INTRODUCTION...

... excavation numerical model tunnel strain concentration factor mechanics Rock Mechanics and Rock Engineering: From the Past to the Future Ulusay et al. (Eds) © 2016 Taylor & Francis Group, London, ISBN 978-1-138-03265-1 Evaluation of discontinuity and opening geometry effects on roof beam deflection...

...Rock Mechanics and Rock Engineering: From the Past to the Future Ulusay et al. (Eds) © 2016 Taylor & Francis Group, London, ISBN 978-1-138-03265-1 The use of underground laser mapping for numerical model calibration E. Jones & D. Beck Beck Engineering, Sydney, Australia F. Reusch Beck Engineering...

... fracture around cavities and to assess the potential of the numerical model to simulate this behavior, published laboratory physical models on plaster and granite are simulated numerically. The numerical models are presented and the calibration of the BPM microparameters is described. Then, the calibrated...

... dilatancy numerical model constitutive model choice Walton simulated stress path Diederich Canada ABSTRACT: Based on recent advances in modelling the post-yield behaviour of brittle rock, the authors have developed a calibrated inelastic model of the 7910 level (2.4 km depth) at the Creighton Mine...

... materials by considering the difference between total displacement and strength factor both for supported and unsupported conditions. The effect of existing underground openings that are adjacent galleries were also simulated in the numerical models that could not be modelled in rock mass classification...

..., a simple empirical relationship, a theoretical expression or even the designer's practical experience may be adequate while, in other cases, sophisticated numerical modelling, in-situ and laboratory testing, validation and redesign may be required to arrive at an effective and economical support solution...

... during cutting that causes the wear of the bit. Numerical models of the Automated Rock and Coal Cutting Simulator (ARCCS) were developed using the ABAQUS. Two bit designs K-1M and K-2M were analyzed numerically and it was found that the effect of heat developed on the bit not only depends on the friction...

... of the joints was determined using the Barton-Bandis criterion (1990), resulting in a joint roughness coefficient JRC = 10, a joint wall compressive strength JCS = 42 MPa, and a residual angle of friction r = 35 , equivalent to the friction coefficient of the rock. 4 NUMERICAL MODELING In order to estimate...

... theoretical equations (Sagaseta, 1986), the analysis of the evolving motion of block system was also assessed in this paper by using a discrete deformation analysis (DDA) numerical approach. A number of numerical models were set up in order to analyze stability and movement type issues associated to a single...

... be, in some cases, prohibitive if large numerical models are used. However, the advances in the coding of the algorithms, more power- ful computers and parallel and distributed computing can help mitigating this drawback. This work focuses on the performance analysis of an ES in back analysis of geomechanical...

... Abstract This paper presents a study of the deformational behaviour of the rock mass during the excavation of the underground powerhouse cavern of the Salamonde II re-powering scheme, located in a mountainous region. The rock mass parameters considered in the three-dimensional numerical model...

... with the physical models described two years after this first study by Alejano et al. (2011). Additionally, a numerical model by means of the DEM-based code UDEC (Itasca, 2008) is carried out to simulate the observed phenomena. This model is able to better explain the features of the failure mechanism observed...

... of methods to estimate this rock mass property. One of the method is 3D numerical model calibration to obtain the key mechanical properties of the rock mass. At Mae Moh mine, Lampang, Thailand, engineers initiated a large scale field experiment of a undercut slope in northeast pit wall, named Area 4.1...