Article
UndergroundLining Raise-Bore Shafts
Kristian Loevlie
Read MoreWhen raise boring is used, a circular excavation is roduced either between two existing levels in an underground mine or between the surface and anexisting level in a mine.
Kristian Loevlie
Read MoreWhen raise boring is used, a circular excavation is roduced either between two existing levels in an underground mine or between the surface and anexisting level in a mine.