Optimum cut-off grade’s calculation in open pit mines with regard to reducing the undesirable environmental impacts

Abstract

Cut-off grade -a criterion used to discriminate ore from waste -has direct impact on mineable reserves and average grade of the materials that must be processed. The most comprehensive method for determination of optimum cut-off grades in metal deposits with the goal of maximising the net present value is provided by Lane's algorithm. Lane's algorithm includes income and the production costs of the final product, mining, processing and refinery capacities and grade distribution of the ore deposit, but he did not consider the reclamation costs and incomes. This study provides a model for determination of cut-off grades in open-pit mines. In this model, in addition to costs associated with management and reclamation of waste dumps, tailing dam and pits, possible incomes from reclamation are also considered. Developed model has been verified by data gathered from Gol-Gohar iron mine of Iran and results indicated that there is some important improvement in mine project goal.

System Dynamics Modeling: A Prototype Technical-Economic Analyzation Tool for Supporting Sustainable Development in Operational Metal Mines

“…Taking Lane's algorithm as a basis, Asad and Topal [5] demonstrated the combined impact of introducing economic parameters, escalation and stockpiling options into the cut-off grade optimization model. Consistent with the research of Asad and Topal [5], Narrei and Osanloo [6] provided a model for the determination of cut-off grades in open-pit mines. In addition to the costs associated with the management and reclamation of waste dumps, tailing dams, and pits, possible incomes from reclamation are also considered in this model.…”

Developing sustainable geotourism as post-mining land use programs in Indonesia

“…The scholars advocated utilizing the Analytical Hierarchy Process (AHP) and the technique for order preference by similarity to ideal solution (TOPSIS) to analyze post-mining land usage using the economy, social, technical, and mine site evaluation (Soltanmohammadi et al, 2010). Then, the other scholars analyzed post-mining land use using entropy, weighted least squares, and AHP techniques (Narrei and Osanloo, 2011). The combination of PROMENTHEE and SIR techniques is used to analyze post-mining land use (Amirshenava and Osanloo, 2017).…”

Development of open-pit mine reclamation cost estimation models: A regression-based approach

“…Therefore, to successfully implement the reclamation plan, its costs should be incorporated into the mine planning and design. Besides, considering these costs in the mine planning and design is one of the main requirements for achieving SD and performing responsible mining [5][6][7][8][9][10]. To this end, mine reclamation costs should be estimated at an acceptable level of confidence at the preliminary stages of the MMLC [11].…”