... the lease area. To the west, the Basal Reef sub-outcrops against the Leader Reef beyond the lease area. additional support timber bay investigation support system mining efficiency support design shaft time unisel timber pack metals & mining leader reef Johannesburg welkom...

... Geotechnical data can be used to optimize the support design for a specific geotechnical environment. The current legislative environment in South African mining drives rock engineers to design support layouts which attempt to engineer out situations of noncompliances, therefore possibilities...

... direction, but where the dip is greater than 10°, they can either be oriented longitudinally (parallel to strike) or transversely. metals & mining rockfall Upstream Oil & Gas esterhuizen support design risk management orientation discontinuity transverse stope stope orientation...

... of a vertical borehole (GT008) to a depth of 1 225 m was used to provide an indication of rock mass conditions within the shaft barrel and empirical shaft support design recommendations. Forty seven percussion boreholes surrounding the Shaft #1 position were drilled and grouted to a depth of 60 m to form...