... hydraulic fracturing discontinuity metals & mining rockmass reservoir geomechanics stress state numerical discontinuous large-scale numerical model ahmed mechanical properties numerical model stress field in-situ stress measurement boundary stress measurement fracture...

.... 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...

... 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...

... 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...

.... 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...

... 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...

... 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...

... 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...

... 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...

... and plunges southwest. The bulk of the economically viable portion of the deposit is highly jointed and rockmass quality is in the order of 35 - 55 (RMR76, Bieniawski), placing it in a poor to fair classification category. The case study presented here focuses on a single strike drive ("G") located...

..., with Nickel Rim South providing the majority of the material at 1.3 Mt/year. All three operations are hard rock mines, with excellent rockmass quality. The depth of mining is sufficient to develop pervasive stress fracturing around most openings (Figure 2). Mining induced seismicity occasionally causes...

... 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...

... the potential development of additional flow paths and affects the fluid pressure distribution, which, in turn, affects the mechanical response via the effective stress concept. The mechanical framework uses a strain-softening, dilatant and discontinuum constitutive model for both bulk rockmass and structures...

... 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...

...1. INTRODUCTION When characterizing the geometry of a rockmass, it is often relevant to determine the size of typical blocks formed by fractures or by the intersection of fractures with an excavation surface. These block size estimates can be used to examine support or protection requirements...

... machine learning Upstream Oil & Gas correlation reservoir geomechanics rockmass Reservoir Characterization strength variability excavation unsatisfactory performance three-sigma approach reliability plastic zone radius reliability analysis hoek-brown failure envelope...

...1. INTRODUCTION As numerical simulation tools for geotechnical analysis and rock engineering become more sophisticated and powerful, reliance on empirical rockmass characterization tools becomes less necessary and less appropriate for advanced analyses. The ability to model structural complexity...

... 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...

...1. INTRODUCTION Rock deformation associated with long-term viscous behavior in tunneling is an important consideration in weak rocks, particularly at great depths where high deviatoric stresses govern. This behavior can be challenging during the design and construction of tunnels in weak rockmasses...

... Abstract: The influence of tunnel shape on rockburst manifestation is analyzed in FLAC 3D using several indicators including velocity and acceleration within the finite difference method. The tunnel is constructed in a rockmass defined by a Mohr-Coulomb strain-hardening/-softening...