Grade Control at Bethlehem Copper

CIM Bulletin, 1965

C. J. Coveney Production Engineer D. C. Stevens Mining Engineer; H. Ewanchuk Mine Geologist, Bethlehem Copper Corp. Ltd ., Ashcroft, B.C.

This paper, after a brief introduction to the mineralization and structure in the mine area, outlines the methods now being employed for grade control at Bethlehem Copper Corporation. Sampling, subgrade drilling, blasting and the actual outlining of the ore are among the topics covered. The paper concludes with a summary of the results obtained, showing a reduction in dilution and an improvement in the grade of the co11 per ore going to the mill.
Keywords: Bethlehem Copper Corporation, breccia, diorite, drill cuttings, subgrade, copper, Drilling, Fault, Grade, Ore, Ores, Pipe, Pits