Loading and Haulage Equipment Selection for Optimum Production in a Granite Quarry
A. O. Owolabi*
Citation : A. O. Owolabi, Loading and Haulage Equipment Selection for Optimum Production in a Granite Quarry International Journal of Mining Science 2019, 5(2) : 35-40.
The appropriate selection of suitable fleet of equipment and their application could minimize the capital and operational costs. One of the major costs in mine is related to the purchase and application of equipment. Proper fleet selection, in a way that secures the production needs of a mine as well as minimizing the cost of production, is one of the main challenges of mine planners. The equipment selection process can be classified into three phases i.e. type of fleet, size of equipment, and calculation of required numbers. This study focuses on the proper equipment selection that optimizes production efficiency, and meets the desired output from the available working-time which can also be referred to as the time factor. This is achieved by helping in the determination of a satisfactory cycle time that will conform with the continuous functioning of the loader, which leads to the design of a fleet system that will be perfect for a shovel from the inequality CYTMIN ≤ NT (Tl + Ts). This implies that the circle time must be less than or equal to the number of trucks multiplied by the summation of the loading time and the spotting time. This also means that the loader should at no time during the loading and haulage operation await other trucks, unless there is a problem at the crushing unit. The optimal determination of the number of trucks that will be effective for the continuous operation of any selected excavator to yield the desired output of the company forms the basis of this research.