Quote:
Originally Posted by hollydog
That is really interesting.Have you a picture of the drill bit?
How did the guys on the surface know when to stop in order to let the men underneath clear away the rock ?
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I'm not sure how they worked it, If I recall correctly they had an 'Eimco Shovel' (small electric bucket loader) up there. Probably just let a big heap develop 'til it reached the roof then start clearing it as the shaft bottom filled up?
Here's a
bit being attached in some Turkish mine, and one
reaching the surface
And a nice animation of the process