Sources de dilution dans les mines souterraines : Méthodes de calcule

CIM Bulletin, Vol. 94, No. 1048, 2001

S. Planeta, Université Laval, Québec, Québec

The principal sources of dilution during underground evaluation and mining are discussed, then definitions of ore dilution currently in use are analyzed. These definitions vary depending on the authors. A new ore dilution evaluation methodology is proposed, replacing the ten different analytical expressions by only two: the planned dilution factor related to the stoping selectivity, done at the mine planning level, and the additional dilution factor related to the efficiency of the dilution control measures during stoping operations. The conclusion shows that the use of this methodology would be a definitive asset in planning, in stoping operations follow-up, and in future costs comparison studies between mining operations.

Mots Clés: Dilution, Exploitation souterraine, Dilution planifiŽe, Dilution additionelle, Dilution finale.