Innovation and perseverance: breaking new ground in hard-rock shaft sinking in the 1990s

CIM Bulletin, Vol. 84, No. 945, 1991
M.J. Medd and G.A. Speirs, J.S. Redpath Limited, North Bay, Ontario
Abstract This paper describes the simultaneous sinking and equipping of a 4.9 m diameter concrete-lined shaft to a projected depth of 1660 m. The shaft blast design utilizes the full face method using a parallel hole burn cut. Hydraulic drilling and a totally redesigned Cryderman-type mucking unit were integrated into the four deck sinking stage to provide for drilling, mucking, concreting and shaft steel equipping operations. A safety program was tailored and implemented specifically for this shaft sinking project.
Keywords: Underground mining, Shaft sinking, Blasting, Concrete lining, Steel furnishing, Safety.
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