Githiria, J.Musingwini, C.Muriuki, J.2018-08-242018-08-242016-11Githiria, J., Musingwini, C. and Muriuki, J. 2016. Development of a computer-aided application using Lane's algorithm to optimize cut-off grade. Journal of the Southern African Institute of Mining and Metallurgy 116(11), pp. 1027-1035. http://dx.doi.org/10.17159/2411-9717/2016/v116n11a42225-6253https://hdl.handle.net/10539/25479The work reported in this paper is part of a PhD research study at the University of the Witwatersrand.The maximization of net present value (NPV) is a primary objective in open pit mine planning processes. In an attempt to meet this objective, cut-off grades are considered in all the stages of mining. There are three stages involved in resource extraction, namely mining, processing, and refining/marketing, which are all defined in Lane's approach. Using Lane's approach, the economics involved in each stage are identified independently and interact to provide an optimum cut-off grade. A hypothetical block model is used to illustrate how a computer application (Cut-off Grade Optimiser) that was developed in this study is used in the optimization of cut-off grades using Lane's algorithm. This paper analyses the application of Lane's approach for a single element in cut-off grade optimization as applied in the calculation of the optimum cut-off grade through a computer-Aided application. Although Lane's approach is not complex it is not widely applied to maximize the NPV of mining operations as the iterative calculations can be lengthy. The computer application developed in this study shows how Lane's algorithm combined with a linear programming function can optimize cut-off grade with regard to the complex situations faced by mining operations. The application saves users from performing otherwise lengthy, iterative calculations.en© 2016. The Southern African Institute of Mining and Metallurgy. This Journal provides immediate open access to its content on the principle that making research freely available to the public supports a greater global exchange of knowledge.C++ programmingComputer aided analysisComputer programmingLinear programmingOpen pit miningOptimizationCut-off gradeMining operationsIterative calculationArticle