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Open pit mine scheduling model considering blending and stockpiling / Rezakhah Mojtaba; Moreno Eduardo Proceedings of the 28th International Symposium on Mine Planning and Equipment Selection MPES 2019 ed / Erkan Topal Springer 2020 p 75 82 Springer Series in Geomechanics and Geoengineering
·Open Pit Mine Scheduling Model Considering Blending and Stockpiling M Rezakhah E Moreno Engineering Environmental Science 2019; Open pit mine production scheduling OPMPS is a decision problem which maximizes net present value NPV by determining the extraction time and destination of each block of ore and/or waste in a
·Simulation studies have been carried out on BIBO stockpiles to understand the blending opportunities of the different options for building and reclaiming and to identify the methods that achieve
·Grade blending and stockpiling is another important aspect present in short to long term mine planning The main two approaches to this is to include the stockpiling decisions while developing a long term term plan or to develop a long term plant with no stockpiles and postponing the stockpiling decisions to medium and short term plans
·Long term plans 12 month rolling plans and six week plans are currently in place and the scheduling is done through Geovia MineSched Stockpiling is used to create buffer stocks and for blending purposes Load and haul through truck and shovels is used for material movement in the iron ore mine Geoscans are used for grade control
Practical Performance of an Open Pit Mine Scheduling Model Considering Blending and Stockpiling 0 ： 44 ： M Rezakhah E Moreno A Newman ： Open pit mine production scheduling
·This article proposes a production scheduling formulation for open pit coal mines including stockpiling and blending opportunities which play a major role in maintaining the quality and quantity
·The multi period blending model incorporates stockpiling of raw material and explicitly captures the geological variability of coal using chance constraints A case study is evaluated and demonstrates that explicitly modelling geological variability can reduce the risk of breaching product specifications without any revenue loss The
·Simulation studies have been carried out on BIBO stockpiles to understand the blending opportunities of the different options for building and reclaiming and to identify the methods that achieve maximum blending Role of pre crusher stockpiling for grade control in iron ore mining article{Jupp2013RoleOP title={Role of pre crusher
·Similarly Rezakhah et al [19] presented an open pit mine production scheduling model that considers stockpiling for blending of material from various phases of the mine to avoid high
·Stockpiling can be used to optimize OPMPS to increase the mine value by processing high grade blocks in the early period and maintaining low grade blocks for future processing It also provides the flexibility to store excess ore and utilize it when processing capacity is available Moreover it allows ore blending options to meet the
·Thus stockpiling of the low grade uneconomic material during earlier years becomes an option to process or blend stockpiled material during later years of mine life
·Stockpiling can be used to optimize OPMPS to increase the mine value by processing high grade blocks in the early period and maintaining low grade blocks for future processing It also provides the flexibility to store excess ore and utilize it when processing capacity is available Moreover it allows ore blending options to meet the
·Typically these blending processes are performed after the pri mary crusher step Within mining pre crusher stockpiling is often used for its operational simplicity but it typically lowers the confidence of the ore grade and reduces certainty in feed quality [15] Pre crusher stockpiling takes on five forms which are illustrated in
·According to Kumral 2006 the efficiency of a blending system is dependent on three factors Stockpiling method This is the way in which material is placed onto the stockpile by the stacker The stacker is mostly responsible for homogenization not the reclaimer SACPS 2011 Stockpiling parameters These include the length
·Design options for pre crusher stockpiling should consider the four competing roles of storage buffering blending and grade control to produce predictable and uniform crusher feed grades
·The length of the rows and building in either one or two layers has little effect on the extent of design can provide a reasonable compromise between the four Jupp K Howard T J and Everett J E 2013 The role of precrusher stockpiling for grade control in mining in Proceedings Iron Ore 2013 pp
·manage the environmental risks of waste stockpiling Waste stockpiling is defined as the temporary storage of waste prior to disposal or as part of recycling reprocessing recovery or reuse activities In Tasmania waste is commonly stockpiled at • Municipal transfer stations • Resource recovery facilities • Scrap metal wreckers
·Design options for pre crusher stockpiling should consider the four competing roles of storage buffering blending and grade control to produce predictable and uniform crusher feed grades
·As is the case with many processes blending or mixing is a necessary step to ensure optimal product quality Typically these blending processes are performed after the primary crusher step Within mining pre crusher stockpiling is often used for its operational simplicity but it typically lowers the confidence of the ore grade and reduces
·Finally shipping of the blended mineral pellets and metallurgical site logistics and blending mixtures before the furnace feeding In this work an enterprise wide optimization of a unified mining and metallurgical of raw materials is proposed for an improved stockpiling and blending in both supply chains Thus their integration can be
• Creation of software for controlling stockpiling blending quality and flow of both ores and pellets at the courtyards of Tubarão Port Complex with 4 million tons capacity • Study that led to a reduction of basicity variation on blast furnace pellets
·Finally part V manages the geological risk by minimizing the deviations from the production targets related to mining stockpiling and processing capacities as well as grade blending requirements For that purpose penalty costs c h H c P c S c ε a n d c ε − are applied to correspond to the production requirements and targets as
