Cratering by a row of short charges

CIM Bulletin, Vol. 71, No. 789, 1978

Robert R. MacLachlan, Associate Professor of Mining, Department of Mining and Metallurgical Engineering, McGill University, Montreal, Que.

New underground mining technology is evolving through the use of large-diameter boreholes containing individually restricted charge weights. This article presents summary observations on cube-root scaling trials using single and rows of charge blasting in sand and in frozen ground. These observations have some bearing on the evolving underground practice, especially where charges of appropriate geometry are used.
Keywords: Blasting, Cratering, Explosives, AN/FO, Slurries, Overburden, Underground mining.