Renovation of the drainage system at Inco's Pipe Open Pit

CIM Bulletin, Vol. 73, No. 816, 1980

R.G. ACHTER and E. WILSON, Mine Engineering Supervisor and Superintendent, Pipe Mines, Inco Metals Company, Thompson, Manitoba

This paper describes the work undertaken to renovate the Pipe Open Pit drainage system, incorporating measures to improve effluent quality. It describes the technical feat of drilling an 11-inch-diameter hole from the bottom of the open pit for a distance of 1100 feet to intersect an underground drift. An innovative method of checking the inclination of this hole is also described. The paper outlines the construction required on the 1500-foot level of the underground mine to facilitate water impoundment and slime settling, as well as the instrumentation for control of water flows.
Keywords: Open-pit mining, Drainage systems, Pipe open pit, Effluent quality, Water flow, Drilling, Dewatering.