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Journal of the Southern African Institute of Mining and Metallurgy
On-line version ISSN 2411-9717
Print version ISSN 2225-6253
Abstract
TOSUN, A.. A modified Wipfrag program for determining muckpile fragmentation. J. S. Afr. Inst. Min. Metall. [online]. 2018, vol.118, n.10, pp.1113-1199. ISSN 2411-9717. http://dx.doi.org/10.17159/2411-9717/2018/v118n10a13.
The size distribution of the muckpile formed as a result of open pit blasting operations has a considerable effect on the efficiency of loading, hauling, and crushing. Various researchers have developed specialized computer software that uses image analysis methods for determining the size distribution of the muckpile. However, these methods have some limitations. One of the most important of these limitations is that the very fine fragments in the muckpile cannot be used in the size distribution calculation. In this study, 18 test blasts in total were carried out in two limestone quarries belonging to Batigim Corp. in Izmir, Turkey. A new model was developed in order to ensure that very fine fragments are used in the size distribution calculation. The size distributions of the test blasts were calculated by both the Wipfrag computer program and the new model. Correlations were established between the muckpile size distributions determined by both methods and the parameters determining the efficiency of the loader.
Keywords : Muckpile size distribution; blast efficiency; Wipfrag program.