Bord-and-pillar mining in inclined orebodies

摘要

This paper addresses the critical parameters that need to be considered when designing a mechanized bord-and -pillar mining layout for a narrow tabular steep dipping orebody. These parameters are: Reef dip, Reef width, Geological structures within the orebody, Physical dimensions of the selection of machines, Gradeability of the selection of machines. The main objective in designing such a layout is to maximize machine efficiencies whilst minimizing dilution. This methodology was then applied in the design of a mechanized bord-and-pillar mining layout for a given piece of ground (Vlakpoort and Moddergat) using a give selection of machines. This piece of ground contains the PGM bearing UG2 Reef with an average thickness of 124 cm and dipping at 18 deg with adverse strike and dip changes.