An Objective Assessment of Shaft Hoisting
Abstract
This article challenges the methodology commonly used in assessing the options of truck haulage and shaft hoisting in underground mines.
The interaction and impact of both shaft hoisting and truck haulage on other mine operations and infrastructure is often not adequately considered in feasibility studies. However their effects can be both significant and extensive, and should not be overlooked even in the broadest of scoping studies. In particular, ventilation costs are critical in any assessment of truck haulage and shaft hoisting at depth.
Where the investment can be justified, reduced mining costs achieved through shaft hoisting provides the means for lowering cut-off grades and for extending economic ore reserves at depth. The impact of shaft hoisting on reserve estimates, production rate and life of mine should clearly be reflected in any assessment of truck haulage and shaft hoisting.
Long term mine planning is essential for the timely introduction of shaft hoisting, with clear implications for the underground exploration programme and mine development schedule. Cost analysis models are proposed to assist mine owners in comprehensive assessments of truck haulage and shaft hoisting options, with the aim of realising the maximum value from their mineral resources.