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Shaft Sinking from 2007 to 2020: Mechanical excavation
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.
Shaft sinking from 1970 to 2007: Mechanical excavation
During the 1970 to 2007 time period, there were a number of changes to traditional shaft sinking systems, both in Canada and in other countries around the world.