Assessment of drilling and blasting parameters to minimize ore dilution and ore loss at Kilembe mines.

Abstract

Dilution, which is difficult to quantify accurately, is a major concern in underground mining. The level of dilution at Kilembe mines is currently difficult to assess owing to the complexity of the ore body The acceptable dilution levels differ from mine to mine but the current dilution of 66.6% on the mine is too high. This paper attempts to assess the drilling and blasting parameters so as to minimize excessive dilution levels at Kilembe mines. Data for drilling and blasting and rock properties were collected in the field. Minimum dilution was achieved after determining the optimum drilling and blasting parameters that affect dilution, optimum fragmentation, throw and ground vibration and this was done by assessing explosive and rock properties and other factors that contribute to ore dilution. At the end of this project conclusion and recommendation were given based on title of assessment of drilling and blasting parameters to minimize ore dilution and loss at Kilembe mines.