... threshold geomechanics symposium pillar extraction closure logger mining hangingwall zvarivadza instrument investigation deformation chikande ARMA 24 1011 Investigation into the rock mass response to pillar extraction in a hard rock tabular mine Moyo, S1., Chikande, T1., Zvarivadza, T2...

... of the univariate analysis showed the OB for the hangingwall of stope type A and the UB for the east and west walls of stope type B were the critical underperforming parameters. Bivariate analysis showed trends linking OB to Richter scale seismic events, rock quality designation, stand-up time, and spatial...

... gallery structural surface Upstream Oil & Gas rqd geotechnical block model greenstone belt ore vein anglogold ashanti hangingwall rock mass ARMA 19 1811 RQD BLOCK MODELLING FOR THE IDENTIFICATION OF A SHEAR ZONE AT A NARROW VEIN UNDERGROUND GOLD MINE Ramires, J.E.F. AngloGold Ashanti...

... conditions were observed. Less face, sidewall and hangingwall damage were noted due to the good ground conditions as compared to the previous situations. Numerical modelling was also conducted to simulate Energy Rate of Release (ERR), major principal stress (sigma 1) ahead of the mining faces and simulation...

... the objectives of the study, empirical span determination using rock mass classification methods, stability graph method and numerical modeling were used. The assessment using Q system on the hangingwall and sidewall of all the case studies shows that the ground is in good condition. Assessment using stability...

... the investigation identified that the hangingwall of the North Pit of the mine showed progressive movement with maximum movement found to be 8.5 mm/day. This proved a hypothesis that there is a crack existing behind the slopes. Routine inspections of the mine were done with the purpose to identify geological...

... with bad ground conditions in the stopes enhance support efficiency. Reinforced support crew training is also beneficial in implementing the improved support strategies. knowledge management support design elongate metals & mining hangingwall Reservoir Characterization variability...

... such as regions truncated by faults. Reservoir Characterization metals & mining machine learning Artificial Intelligence preliminary support design longhole shaft pillar prefeasibility study stope central stope hangingwall excavation Upstream Oil & Gas support design pyroxenite stand...

... to water flows. excavation classification mining cut geotechnical data formula stability pillar design span hangingwall strength reservoir characterization metals & mining calculation reservoir geomechanics redesign unsupported span pillar strength upstream oil & gas pillar...

... compressive strength tests were conducted to calibrate the point load index. Tunnel mapping was conducted in the hangingwall of the Printzsköld orebody. The finite element modeling code Phase2 was used for a sensitivity analysis of rock strength parameters and to study factors that may influence initiation...

...]. 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...

... & Gas wall convergence variability reservoir geomechanics deterministic model strength stope stability major principal stress rock mass Reservoir Characterization stope material property modeling stage 5 rock mass property hangingwall normal probability density function deformation...

... hangingwall over-break data from longhole open stopes from a number of key mining blocks. For the numerical modelling exercise, results grids were placed such that various components of velocity and plastic strain could be ascertained into the hangingwall rock mass, with modelling steps calculated...

... in-situ horizontal stress Upstream Oil & Gas hangingwall elasticity rock mass Plan View unbalanced force software in-situ stress reservoir geomechanics stope failure zone application mining sequence remnant pillar ARMA 09-202 3-Dimensional Numerical Modelling of Stope Sequencing...

... Oil & Gas shear zone high stress excavation support system magnitude event Orebody major event strain burst hangingwall seismicity personnel mining hazard map Magnitude 1. INTRODUCTION Monitoring of seismicity at Creighton Mine in the last two decades shows that the majority...

... Characterization stope strength stage 14 modeling reverse fault strong discontinuity cable bolt discontinuity sequence extraction hangingwall Ground Support stillwater complex stability pillar ground condition layout stage 13 1. INTRODUCTION Stillwater Mine, the largest primary producer...

... extraction of the UG2 reef horizon are also provided. The extent of mining in the Bushveld Complex is shown below in Fig. 1. metals & mining Reservoir Characterization merensky reef horizon Merensky Reef MPa stope reef horizon hangingwall reservoir geomechanics face stress convergence...

... in-stope support dimension drilling operation management Thickness Johannesburg mining direction fallout height stability internal anglogold report fallout thickness hangingwall stable pillar span pillar span Reservoir Characterization reserves evaluation keyblock elongate span mid-panel...

... large scale structures likely to contribute to dilution from stope walls (See Figure 1). Fig. 1. Large scale features exposed on a stope hangingwall. Instead of geotechnical mapping, most mines undertake routine drive mapping which is carried out by mine geologists who gather information on rock types...

... (relative movement of the hangingwall and footwall normal to the plane of the excavation) is measured, profiles similar to that illustrated in Figure 1 are obtained. It should be noted that these continuous closure measurements contain much information that is lost with the more conventional daily or longer...