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Shaft-Sinking Investigation, Johan De Beer
Shaft-Sinking Investigation, Johan De Beer
Bachelors Theses and Reports, 1928 - 1970
During the past few years there has been a tremendous advance in the rate of sinking shafts. The sinking of shafts has always been one of the more costly and time consuming operations in the development of a mine. Shaft sinking is a long-term operation and only in the past few years has there been a remarkable increase in the rate of sinking.