Shaft sinking from 1970 to 2007: Mechanical excavationEvolution of shaft sinking systems in the western world and the improvement in sinking rates (Part Six)
Evolution of shaft sinking systems in the western world and the improvement in sinking rates (Part Six)April 16, 2020
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The two major developments in shaft sinking between 2007 and 2020 are the successes in mechanical excavation and the number of shafts sunk in China.
The period between 1940 and 1970 can really be called the golden age of shaft sinking.