Pit Optimization for Improved NPV and Life of Mine in Heterogeneous Iron Ore Deposit

Sinha, Sugata Kumar; Choudhary, Bhanwar Singh

doi:10.1007/s40033-020-00236-z

Cited by 3 publications

(1 citation statement)

References 11 publications

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“…The conducted research made it possible to establish that the proposed development system allows reducing the cost of ore extraction due to the optimization of drilling operations (shorter drilling time for wells, reducing the length of drilling, reducing the resistance line on the sole, and others) and thus improving the economic indicators of the enterprise [16], as well as to exclude costs for re-equipment of the enterprise in order to work out the benches of the pit in layers of 15 m.…”

Section: Fig 1 the Diagram Of The Relationship Of Factors Aff Ecting ...mentioning

confidence: 99%

Substantiation of the optimal parameters of the bench elements and slopes of iron ore pits

Sobko¹,

Ложніков²,

Chebanov³

et al. 2022

Nauk. visn. nat. hirn. univ.

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Purpose. To establish the optimal parameters of the bench elements and slopes of the pit at the mining of Horishne-Plavnynske and Lavrykovske deposits of ferruginous quartzites for further use of these parameters at the design. Methodology. Methods for determining the influence of the bench height on the productive pit capacity involves taking into account the quality of the ore, the rate of the mining front advancement, the rate of pit depth at the mining operations, the total length of the mining front, as well as the angles of the working and non-working pit slops. Findings. The most effective parameters for mining benches and slopes of an iron ore pit are considered, using the example of the Ferrexpo Poltava Mining. Parameters of the bench elements with a height of 2430 m have been established, which are worked out in layers with a height of 12, 10 and 15 m. The studies carried out made it possible to establish that layers with a height of 10 m, followed by the final and temporary pit contour with a bench height of 30 m, can improve safety due to the flattened slope of the pit up to 45, while, with a bench height of 15 m, the angle of inclination of the slope will be 47. Originality. The established dependence of the pit ore productivity in percentage on the bench height suggests that with an increase in the bench (layer) height, the ore productivity of the pit decreases. Determination of the influence of the working bench (layer) height on the total volume of ore losses in the design contour of the pit makes it possible to assert that at constant angles of the bench slope and the ore deposit fall, the values of operating losses and clogging change in direct proportion to the height. Practical value. A technological scheme has been developed for the development of a bench with a height of 30m with a layer thickness of 10 m, which makes it possible to improve safety in the pit by pit slope flattening to 45, to reduce the cost of ore mining by optimizing drilling operations (shorter drilling time per well, reduction of overdrilling and etc.) and thereby improve the economic performance of the enterprise.

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Section: Fig 1 the Diagram Of The Relationship Of Factors Aff Ecting ...mentioning

confidence: 99%

Substantiation of the optimal parameters of the bench elements and slopes of iron ore pits

Sobko¹,

Ложніков²,

Chebanov³

et al. 2022

Nauk. visn. nat. hirn. univ.

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Integrated Approach to Reserve Estimation and Optimal Open Pit Design for Hydrothermal Gold Deposit

Deressa,

Bulushi,

Choudhary

et al. 2024

J. Inst. Eng. India Ser. D

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Substantiation of the optimal performance parameters for a quarry during the stage-wise development of steeply dipping ore deposits

Fomin

Ovsyannikov

2022

PMI

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The use of stage-wise schemes in the development of deep quarries is one of the ways to increase the economic efficiency of mining a deposit and determining the optimal stage parameters remains an urgent task. Such parameters are stage depth, bench height, block length, etc. However, there is a wide range of values for these parameters. Therefore, to select the optimal values and evaluate the effectiveness of design solutions, it is advisable to use the net present value, which is an international notion. As a result of the analysis of data on deposits, a large number of variable indicators can be identified that presumably affect the efficiency of mining. The article proposes to divide all parameters of the quarry mining into two types: mine engineering and economic. The importance of each of them is determined by the measure of influence on the net present value. Thus, to assess the measure of influence of mining indicators, the average values of each of them are taken, and as a result of the alternating change of one parameter under study, the measure of its influence on the discounted income received is estimated. The results of the analysis of relevant factors, their evaluation and comparative analysis are important indicators that significantly affect the design decisions made and the effectiveness of the investment project.

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Pit Optimization for Improved NPV and Life of Mine in Heterogeneous Iron Ore Deposit

Cited by 3 publications

References 11 publications

Substantiation of the optimal parameters of the bench elements and slopes of iron ore pits

Substantiation of the optimal parameters of the bench elements and slopes of iron ore pits

Integrated Approach to Reserve Estimation and Optimal Open Pit Design for Hydrothermal Gold Deposit

Substantiation of the optimal performance parameters for a quarry during the stage-wise development of steeply dipping ore deposits

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