Ultimate pit optimization with environmental problem for open-pit …
Increase the attributed unit ecological costs (0.0975 US$/t and 0.3822 US$/m 3) to the corresponding original unit costs of coal mining (1.79 US$/t) and rock stripping …
اقرأ أكثر
Introduction: Managing Large-Scale Mining Operations
The slower it is mined the lesser equipment is required making the capital costs lesser, which will also slower the extraction of the valuable component, the ore. So, this might lower costs, but it also has lower revenues and hence lower profits. ... Open pit optimization–strategies for improving economics of mining projects through mine ...
اقرأ أكثر
(PDF) Cost optimization of drilling operations in open …
Results: Results show that the proposed approach could be used to determine the optimal drilling parameters and minimize the energy cost in open-pit mines. Abbreviations: FCCCD: face-centered ...
اقرأ أكثر
Ultimate Pit Limit Optimization by Computerized and Manual
However, this particular economic analysis is limited by operating costs excluding capital costs and general and administrative costs. Figures 15, 16, 17 and 18 compare open-pit designs and cross-sectional slices of A–A', B–B', C–C', and D–D' of pit outlines made by software. 3.2 Summary Results of Manual Method
اقرأ أكثر
Optimized open pit mine design, pushbacks and the gap …
approach used by Lerchs-Grossman implementation of Whittle [8]. A series of heuristically discounted pits is produced in a greedy fashion until it is no longer profitable to consider any further pits. The final pit is used as the ultimate pit limits. This approach suffers from the problem that the pit sizes produced can "jump around ...
اقرأ أكثر
Mining | Free Full-Text | A Review of Models and Algorithms for
It is important that the strategic mine plan makes optimum use of available resources and provides continuous quality ore to drive sustainable mining and profitability. This requires the development of a well-integrated strategy of mining options for surface and/or underground mining and their interactions. Understanding the current tools and …
اقرأ أكثر
Ultimate open pit stochastic optimization
Open pit optimization is done on both p est and p sto for a series of different mining costs (0.10, 0.20, 0.30 and 0.40) and treatment costs (0.40, 0.60, 0.80, 1.0, 1.2). …
اقرأ أكثر
Unlocking Project Value: The Importance of Cut-Off Grade in Pit
Pit-by-Pit Graph Comparison. Scenario 1 (underestimated cut-off grade) produces an optimal pit shell number 15 with a much larger inventory of 186,481kt of Ore @ 0.7% Cu and 228,899kt of Waste ...
اقرأ أكثر
Cost estimation for open pit mines: Tackling cost uncertainties
In this paper, costs in open pit mines are categorized into four groups: (1) capital costs, (2) operating costs, (3) general and administrative (G&A) costs, and (4) fixed costs. Capital costs are ...
اقرأ أكثر
(PDF) Effectiveness of optimization strategies to
In optimizing the production schedule of an open pit operation, ecological costs of mining have been generally treated as externalities and assessed outside the optimization scheme.
اقرأ أكثر
(PDF) OPTIMIZATION OF CAPITAL COSTS AND CARBON FOOT PRINT IN OPEN …
The possibility of reducing off-mine the medium-term is it is 1-5 years, The long term infrastructure has been mentioned (Jourdan, 2008). production planning aims to maximize the net present However specifically for open cast mines, the capital value of the total profits from the mining operations costs attributed to pure mining is limited in ...
اقرأ أكثر
(PDF) Determination of Optimum Production Capacity and Mine …
Here, total operating cost consists of equipment operating cost and workforce cost and etc., whereas the total capital cost consists of purchase and replacement cost associated with interest and depreciation [5]. ... Onur A.H., Dowd P.A.: Open pit optimization-part 2: production scheduling and inclusion of roadways. Transactions of the ...
اقرأ أكثر
(PDF) Transition from Open-Pit to Underground as a New Optimization
To continue mining operations and to obtain greater productivity, a transition from surface mining to underground stopping is necessary as the costs associated with waste removal and management ...
اقرأ أكثر
Long term production planning of open pit mines by ant colony
This paper presents a new metaheuristic approximation approach based on the Ant Colony Optimization (ACO) for the solution of the problem of open-pit mine production planning. The process has the proficiency to optimize the UPL and the long-term planning problem simultaneously considering the multi-objective targets and the complex …
اقرأ أكثر
Capital (a) and operating (b) costs for open pit and …
Context 1. ... operating costs are in the order of US$10-20 per ton (Lovejoy, 2012). Figure 6 illustrates estimated capital costs as well as operating costs for both caving and open pit mines with ...
اقرأ أكثر
How to Deal with the Sustaining Capital Costs and Royalties in …
This presentation attempts to layout a common path for dealing with capital costs and royalties in open pit optimization and mine design. A modified real case study is used …
اقرأ أكثر
Automated Haulage Systems & Open-pit Mining | Mining Strategy
AMC would review the final pit design by developing an updated pit optimization. Changes to key inputs to the pit optimization resulting from the selection of AHS include a reduced hauling cost and potentially, allowances for changes to haul road geometry. Utilizing autonomous trucks could lead to a review of road widths and grades.
اقرأ أكثر
Parametric estimation of capital costs for establishing a coal mine
In a 2008 regression analysis study, the Australian Average Capital Costs (ACC) for developing an open-pit mine were estimated as A$53 million plus A$33 million per 1 Mt/a of coal produced and treatment capacity, while the ACC for an Australian underground mine was estimated as A$37 million plus A$68 million per 1 Mt/a of production and ...
اقرأ أكثر
Calculating ultimate pit limits and determining pushbacks in open-pit
A very important part of any open-pit mining project is determining the ultimate pit limits and optimizing the pushbacks. Currently, block models are the most widely used for calculating mineral resources and reserves. Block models can define the ultimate pit limits through algorithms like floating cone, Lerchs-Grossmann, PseudoFlow, …
اقرأ أكثر
A system-wide approach to minimize the operational cost of …
The production cycle of open-cast coal mines generally includes drilling, blasting, loading, hauling and coal preparation activities. Individual optimization of these activities does not mean that the whole system is optimized. This paper proposes a cost model considering all activities in mining cycle and system-wide approach to minimize …
اقرأ أكثر
Optimization of open-pit mine design and production planning
Open-pit mining plans include implementing operations throughout the entire life of the mine. In addition to geometric and geotechnical constraints, it is important to ensure an uninterrupted ore feed by optimizing production plan. In order to achieve this and at the same time maximize the net present value, the most well-known method is …
اقرأ أكثر
Design of an open-pit gold mine by optimal pitwall profiles
Abstract and Figures. The overall steepness of pitwalls significantly influences the financial return of an open pit mine. In current practice, pitwall profiles are planar in cross-section. In ...
اقرأ أكثر
(PDF) Determination of Optimum Production Capacity and
The open pit design and scheduling problem is a large-scale optimization problem that has attracted considerable attention during the last 40 years The development of the "know-how" to improve ...
اقرأ أكثر
Forecasting mining capital cost for open-pit mining projects based …
This study considered and developed four artificial intelligence (AI) techniques to estimate mining capital cost (MCC) for open-pit copper mining projects with high …
اقرأ أكثر
Hybrid Model for Uncertainty Assessment in Open Pit …
production rates, operating capital cost, metallurgical performance and product quality. On the other hand, ... open pit optimization under uncertain market con-ditions.
اقرأ أكثر
Pit Optimization for Improved NPV and Life of Mine in
Operations planning and management of a large open pit mine is an enormous and complex task, particularly for mines having long life. The long-term planning of open pit mine is a dynamic process and should be reviewed periodically for enhancing the NPV and life of mine. Pit optimization through soft computing can be gainfully …
اقرأ أكثر
NPV risk simulation of an open pit gold mine project under the …
This paper analyzes an open pit gold mine project based on the O'Hara cost model. Hypothetical data is proposed based on different authors that have studied open pit gold projects, and variations are proposed according to the probability distributions associated to key variables affecting the NPV, like production level, ore grade, price of …
اقرأ أكثر
Forecasting mining capital cost for open-pit mining projects based …
Developed an ANN model for estimating mining capital cost for open-pit mining projects with high accuracy. ... (NPV) of the projects over the lifetime of the mine. In open-pit mining, optimization issues in designing and mining planning have been made (e.g. Ahmadi and Shahabi, 2018; Dimitrakopoulos et al., ...
اقرأ أكثر
The mine planning process for an open-pit diamond …
Overhead (fixed) costs. Stay-in-business capital and expansion capital costs. Haul road design, mining dilution, mining recovery, and minimum mining widths (minimum mining width . The mine planning process for an …
اقرأ أكثر
(PDF) Sensitivity Analysis of Net Present Value due to Optimal Pit
cost $1.35/tonne, selling cost $3.02/tonne, o re price $10/tonne, capital cost $174.503, mining reco very fraction 0.95, mining dilution fraction 0.05, a nnual discounting 10%, a nnual production ...
اقرأ أكثر