... Shaft identified abnormalities with reference to the hangingwall conditions of the stope area as well as pillar and support behaviour. This resulted in premature loading of the grout pack support and fracturing of the pillar edges. The support design was adjusted to cater for the behaviour identified...

... as the Isla Cristalina (Golder 2009). Mineralization is well constrained by upper (hangingwall) and lower (footwall) fault contacts within the 50–100 m wide, east-west and northwest trending Rivera Shear zone. It has drill-defined dimensions of 900 m along strike at surface and >700 m down plunge, dipping...

... Mechanics Keywords: Sublevel caving, hangingwall deformations, GPS, InSAR, prognosis. Eurock 2012 Page 2 1 INTRODUCTION The LKAB mining company is extracting iron ore using the sublevel caving under- ground mining method in the Kiruna and Malmberget mines. Both are world-class mines with a combined total...

... referred to as Hybrid mining methods. There have been a number of large-scale collapses in the bord/room and pillar operations in South African underground platinum and chrome mines. Investigation into these high-lighted deficiencies in either or both pillar and bord hangingwall tendon support designs...

... footwall sketch hangingwall central section mining sidewall empirical design technique long term stability Orebody strength extraction remainder crosscut Upstream Oil & Gas shear zone convergence sequence new strategy Eurock '96, Barla (ed.) (0 1996 Balkema, Rotterdam...

.... Apart from early attempts at Witwatersrand type tabular stoping, all mining has been by the room-and-pillar method, whereby 10m wide stopes are developed on strike, leaving 10m rib-pillars between them to support the hangingwall. This mining method is illustrated in Figure 2. data mining failure...

...). Central to this research is the definition of geotechnical areas, these being areas with different combinations of hangingwall lavas and footwall rock types. This approach is used as it is believed that geotechnical variations may influence mining strategy and design of support systems. Two of the main...

... hangingwall excavation FLAC experimental site Reservoir Characterization structural geology tunnel 3 sidewall siliceous quartzite Material Behaviour deformation friction angle Magnitude stress strain curve Eurock '96, Barla (ed.) © 1996Balkema, Rotterdam. ISBN 90 5410 843 6 The calibration...

... mina Pirite Alentejana operation metals & mining cable bolt hangingwall geometry backfill Reservoir Characterization Moinho recovery stape Orebody long hole sublevel exploitation skin pillar Upstream Oil & Gas mining method primary stape sublevel pillar Eurock '93...

... limestones which establish a characteristic angular unconformity with the limestones of the hangingwall. Due to the impermeability of the bauxite orebodies, groundwater, percolating through the limestone of the hangingwall, lays down clayey muddy sediments, particularly in areas of high joint density...