balance
weight for the cage runs in the pump compartment, which is also the
downcast shaft through which the whole mine is ventilated.
No. 1 is the upcast shaft. It has two compartments for skips, two for cages, one for pipes, etc., and a double ladderway.
At Kimberley mine the rock shaft is a duplicate of De Beers rock shaft, except that the pump compartment is larger.
At
De Beers, tunnels 11 feet wide by 8 feet high have been driven from the
rock shaft at the 800, 1000, 1200, 1400, and 1720-foot levels, and from
No. 1 shaft at the 380, 800, and 1400-foot levels.
