A Report on Improvements in Drilling and Blasting Practices At lOC's Carol Lake Project

CIM Bulletin, Vol. 71, No. 797, 1978

M. H. Pelley, Senior Engineer, Mine Engineering Department, Iron Ore Company of Canada, Labrador City, Nfld.

To increase drill fleet capacity and meet increased ore demands at its Carol Lake Project, the Iron Ore Company of Canada initiated a program in 1975 to convert the Gardner-Denver 120 and Bucyrus-Erie 60-R rotary drill fleet from 12 1/4-inch-diameter multi-pass drilling to 15-inch-diameter single-pass drilling. This paper will examine briefly the conversion program, including some tests and results, and examine how the utilization of the 15-inch-diameter blast-holes, coordinated by a comprehensive drilling and blasting program, has improved the drilling, blasting and drilling-plus-blasting aspects of the mine operations, from both economic and operational viewpoints.
Keywords: Open-pit mining, Drilling, Blasting, Iron Ore Company of Canada, Carol Lake, Bits, Explosives, Powder factors, Rotary drills.