Sources de dilution dans les mines souterraines : Méthodes de calcule

Abstract 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.
Keywords: Dilution, Exploitation souterraine, Dilution planifiŽe, Dilution additionelle, Dilution finale.
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Summary: The geological features of a rock mass have a direct influence on its blasting characteristics.
It has been observed that perimeter control techniques provide excellent results in massive crystalline formations but may give poor results in weak and or highly jointed formations.
A field study was conducted with the objective of understanding the role played by the geological features of a rock mass in producing and controlling blast damage. The field work involved the assessment of blast...
Publication: CIM Bulletin
Author(s): S.P. Singh
Keywords: KEYWORDS: Rock mass, Blast damage, Half cast factor, Blast vibration.
Issue: 1048
Volume: 94
Year: 2001
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