Economic lifetime of a drilling machine: a case study on mining industry

摘要: Underground mines use many different types of machinery during the drift mining processes drilling, charging, blasting, loading, scaling and bolting. Drilling machines play a critical role in mineral extraction process thus are important economically. However, as age, their efficiency effectiveness decrease, negatively affecting productivity profitability increasing total cost. Hence, economic replacement lifetime machine is key performance indicator. This paper introduces an optimisation model that gives optimal for drilling machine. A case study has been done at underground Swedish mine to identify time It considers purchase price, maintenance operation costs, machine's second-hand value. Findings show this 96 months. The proposed can be used other machines.