... geological subdiscipline calculation footwall kaiser stability graph method tolerance instability modified stability graph percentile variability endwall ARMA 24 152 Probabilistic Stope Stability Analysis Based on the Modified Stability Graph Séguineau de Préval, C. A2GC, Montreal, Quebec...

... overburden stresses from deeper parts of the basin to the shallow footwall area and loads the footwall sediments. We built these transient evolutionary simulations with Elfen. We model salt as solid viscoplastic and model sediments as poro-elastoplastic material. 1. INTRODUCTION Several numerical studies...

... metals & mining footwall total radiated seismic energy output parameter radiated seismic energy seismicity Drilling Pattern Magnitude production blast stress variation es ep ratio seismic energy seismic response seismic event stp analysis perpendicular ARMA 18-1012 Multivariate...

... present the analysis of the distribution of the physical and the hydraulic properties of sandstones in both the footwall and the hanging wall of a normal fault. The rock in question is an arcosean sandstone deposited in alluvial fans and braided fluvial environments. The results point out to a clear...

... structures, hazardous conditions and review the quality of the highwall. The conditions of the footwalls were found to be fairly good and it is recommended that the same mining technique carried out when blasting trim benches in the footwall need to be carried out in hangingwall. The implementation of new...

... stress in the footwall of the fault in reverse faulting stress regime. This means that the presence of faults can bring some parts of the reservoir and the cap rock to a more unstable condition. But this does not necessary mean that the fault is unstable itself. Analysis indicates that due to injection...

...]. The mapped fractures include shear fractures emanating from the hangingwall and footwall that are slightly curved, dipping toward the direction of mining and then becoming vertical. reservoir geomechanics stope mechanism plane Reservoir Characterization base model flac-only base model fracture...

... confinement or overstress regime on critical face stability. Two case studies, based on two Canadian operating gold mine shows that using the new Rock Stress Factor A’ to predict the stability of stope hanging-wall and footwall gives better agreement with the CMS survey results, compared with the prediction...

... the mining cost by changing the mining technique to sub-level caving. Many underground works have been considered such as field tunnel, transport tunnels, drilling tunnels, shafts and etc. This paper presents a study to evaluate the stability of the footwall. It is because many infrastructures...

... properties in the geotechnical mine design analyses. In the probabilistic approach, each rock mass parameter is treated as a probability distribution function. A feasibility study of a new mine in Canada was carried out. metals & mining footwall probabilistic model convergence Upstream Oil...

... while monitoring ore dilution. The model showed that by decreasing stope strike length the degree of overbreak from both the footwall and the hanging wall can be reduced with the most significant reductions occurring on the problematic footwall. 1.0 INTRODUCTION Unplanned ore dilution can severely...

.... On the Lapa property, the Fault Zone is almost entirely taken up by the Archean-age Piché Volcanic Group (mafic to ultramafic schists). Reservoir Characterization Artificial Intelligence footwall stress contour sequence pillar extraction sequence Modeling & Simulation metals & mining...

... of waste rock or low grade ore in the hangingwall and footwall. One factor that could have a significant influence on stope overbreak is the undercutting of the stope into the walls. Undercutting stope walls is often necessary, in particular in narrow vein mines. This paper presents a numerical model...

... reservoir geomechanics strength Reservoir Characterization footwall resistance metals & mining pillar strength instrumentation site pillar stress ductile material bushveld platinum deposit South Africa hydrostatic test width-to-height ratio Upstream Oil & Gas pillar...

... occur if the shear zone is locked-up by asperities or by healing. The on-echelon fractures, when crushed, can lead to slips and major seismic events. These events represent risk to major infrastructure such as the haulage ramp and footwall accesses where the shear zones cross the excavations. This study...

... ABSTRACT: A safety review for Folsom gravity dam required knowledge of the shear strength for the dam/rock interface beneath several monoliths that rest on a wavy, fault-footwall surface of granodiorite. The fault zone material had been removed during construction but the concrete was placed...

... ABSTRACT: This paper presents the development of a method which can be used to evaluate the progressive failure of the hanging wall and footwall rock mass related to underground bulk mining of a steeply dipping ore body. The method presented is unique to rock mechanics applications...

... of geologic weakness. The observation of "burst" fractures which emanate at a steep angle in the hangingwall and footwall in a strike-parallel direction from the advancing longwall mining face has been described by Ortlepp (1978). These fractures also appear to be the mechanism for foundation failures...

... microseismic technology as a potential tool for rock burst prediction as early as 1939 (Obert 1939); however, only a few successful predictions have been achieved to date. Reservoir Characterization footwall macroseismic system vein stope 4900-ft level Upstream Oil & Gas mechanism arrival...

... metals & mining mining drift stope roof Reservoir Characterization displacement information altemative design mechanics parameter original design backfill stope 1908 footwall Mining Research Stability Evaluation ore body kPa finite element model changsha institute...