Calculating ultimate pit limits and determining pushbacks in …

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.

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Evaluation of open pit mine slope stability analysis

From the perspective of profit maximization, the larger the slope angle of open pit mines and the smaller the stripping ratio, the higher the economic benefits, but the steeper the slope, which ...

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Is Mexico Moving Away From An Open-Pit Mining Ban …

Open-pit mining, a method often used for extracting minerals close to the surface, is widely criticized for its environmental impact, including deforestation, water contamination, and destruction of ecosystems. ... Sheinbaum may seek to balance Mexico's economic reliance on mining with the urgent need for environmental protection. Some ...

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Mid-long term boundary dynamic optimization of …

1. Introduction. Open-pit mining is a method of extracting mineral deposits by excavating from the Earth's surface. It works by starting at the surface and removing non-economic overlays to access …

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Surface mining planning and design of open pit mining

2. Outline of Topic 6: 1) Definition of Open pit Mining Parameters: 1.1.) Basic Concept 1.2) Open pit Mining method 1.3) Bench 1.4) Open Pit Bench Terminology 1.5) Bench height 1.6) Cutoff grade 1.7) Open Pit Stability: i) Pit slope ii) Pit wall stability iii) Rock strength iv) Pit Depth v) Pit diameter vi) Water Damage vii) Strip Ratio (SR) 1.8) …

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A review of open pit mine and waste dump schedule planning

Such strategic optimisation facilitates the creation of Life of Mine (LOM) economic plans, targeting peak NPV returns. 2. ... The cost of waste removal and handling in open pit mines accounts for some of the largest operational expenses, as prescribed by stripping ratios. With the inevitable depletion of world class ore bodies, such ratios can ...

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Research on the Optimization of Open-Pit Mine …

As the key technology of high-step stripping and blasting engineering, throwing blasting will be the development trend of the production optimization and benefit maximization of the open-pit mine …

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20 Pros and Cons of Open Pit Mining

Direct Employment Opportunities: Open pit mines generally require a larger workforce, thus creating more direct employment opportunities in regions where the mines are located. This can stimulate local economies. Stimulates Local Economies: Besides direct employment, open pit mines often require a range of ancillary services and …

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Open Pit Mining

Open pit mining method is one of the surface mining methods that has a traditional cone-shaped excavation and is usually employed to exploit a near-surface, nonselective and low-grade zones deposits. It often results in high productivity and requires large capital investments, low operating costs, and good safety conditions. The main …

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Open-Pit Mine Planning with Operational Constraints

the economic viability of open-pit mining projects. A major practical challenge is that the resulting mathematical models are very large, with potentially hundreds of millions of variables and constraints. Addressing this challenge and delivering tools which are usable on real-world 3D

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Pit Optimization for Improved NPV and Life of Mine in …

Once the economic parameters are known, the analysis of the ultimate pit limits of the mine is undertaken to determine the portion of the deposit that can be mined …

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Comparative study on the economy of hybrid mining trucks for open‐pit

Fig. 3 depicts the powertrain configuration of a diesel-electric mining truck. Currently, mining trucks work based on the following principle. Under the uphill condition, mechanical energy generated by the engine is transformed into electricity via a generator, and the electric energy is then sent to the electric wheels after being rectified, inverted, …

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St Barbara updates PFS for 15-Mile, Beaver Dam in Nova Scotia

St Barbara (ASX: SBM) updated the prefeasibility study (PFS) for the 15-Mile underground and Beaver Dam open pit projects of its Atlantic Gold division in Nova Scotia. The company assumes the Touquoy gold mill will be relocated to provide 2.1 million t/y of processing capacity, up from 1.8 million t/y as proposed in the October 2023 PFS.

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Design and Evaluation of Open-pit Operations | SpringerLink

The computation of reserves available for a potential open-pit operation must be undertaken in conjunction with a preliminary pit design, for it is this which …

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A simplified economic filter for open-pit gold-silver …

Figure 2--Relationship between capital expenditure and mine capacity of economic U. S. open-pit, heap-leach gold-silver deposits. 7. 8 Capital expenditure = 586 • C 1.1766 (7) Data available did not allow consistent separation of mine and mill capital expenditures, so the revised model combines them. Observed capital

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Economic advantages of belt conveying in open-pit mining

Franke, R. (1982) Combined Mining Systems for Open Pit Mines. bulk solids handling, 1, 75–80. Google Scholar Müller, G. (1986) Senkung der Betriebskosten im Festgestein-Tagebau durch Einsatz von Brecher-Band-Systemen, fördern und heben, 8, 556–559. Google Scholar

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Sustainable long-term production planning of open pit …

This article addresses the critical need to consider and minimize the negative environmental impacts of the operation in the long-term planning of open pit mines, …

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Making the grade: understanding exploration …

As a rule of thumb, open pit mining can process ore for $10 per tonne and, where the ore grade is more than double that at $20 per tonne, results would be economic. Consider that 1% of a metric ...

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Truck-haulage economics of mining open pits by high bench

This paper reviews an analytical model that defines the relationship of weight-weighted or volume-weighted average haulage distance with bench height and other related parameters, presents the optimum bench heights under various conditions in terms of minimizing the weighted average haulage distance of ore/waste during the full lifetime of …

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Pit Optimization for Improved NPV and Life of Mine in …

Whittle is a mine planning tool to optimize an open pit mine in order to maximize the output, i.e., Ore and NPV. Whittle software works on the geological model finally freeze in the Surpac Software. In order to carry out pit optimization, the economic pit limits were determined by using the Whittle (V. 4.7) software.

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Potential Economic and Operational Benefits and …

benefits and costs to be considered when evaluating the application of TA in an open pit mining operation, based on studies completed by BBA for open pit mining projects in Canada. Trolley Assist Fundamentals Haul trucks move around using one of two types of propulsion systems and can be either fully mechanical or diesel-electric powered.

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Overview on an open pit mine planning of the pickstone …

Dagdelen, K. (2001) 'Open pit optimization -Strategies for improving economics of mining projects through mine planning', in 17th International Mining Congress and Exhibition of Turkey. Ankara ...

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THE IMPORTANCE OF DILUTION FACTOR FOR OPEN PIT …

THE IMPORTANCE OF DILUTION FACTOR FOR OPEN PIT MINING PROJECTS* Anoush Ebrahimi, P. Eng., Ph.D. Principal Consultant at SRK Consulting ... With a simple calculation it is possible to compare mine economics for two cases of mining operation, with dilution and without dilution. For this example there will be 21.0% decrease in NPV …

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ECONOMIC ASSESSMENT AND MINE PRODUCTION …

Surface mining operations involve high levels of complexity and uncertainty that last for many years and require huge capital investment and risk. Each open-pit mine is unique, based on the physical characteristics of the ore deposit and …

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Economic evaluation of materials handling systems in a deep open pit mine

Materials handling constitutes a large portion of the costs of mining operations. Therefore, the system chosen must be cost-effective yet meet the production demands of the mine. In this paper, unit haulage costs, economic risk and sensitivity analyses were conducted to determine the optimal way of handling materials in a deep …

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A Simplified Economic Filter for Open-Pit Mining and …

A Simplified Economic Filter for Open-Pit Mining and Heap-Leach Recovery of Copper in the United States By Keith R. Long1 and Donald A. Singer2 Open-File Report 01-218 2001 This report is preliminary and has not been reviewed for conformity with U.S. Geological

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Enumeration optimization of open pit production scheduling …

The research shows that the open pit mine production scheduling optimization algorithm proposed in this article can not only realize the simultaneous …

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Economic optimization of truck transportation in a deep open pit mine

Carrying in deep open-pit mines makes mining more expensive as the depth of the mine increases. The objective of this study is to design an economically optimal transportation plan for the entire ...

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A PROCEDURE FOR PRELIMINARY ECONOMIC …

evaluation for open pit mines. This computer-assisted procedure uses open pit mine design techniques to determine parameters such as cutoff grade, production rate, and …

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Open Pit Optimization Processes Of Okobo Coal Mine

The development of the "know-how" to improve economics of open pit mining projects through the use of mathematical optimization techniques goes back to early 1960's. Unfortunately, up until recently, many of these "optimizing algorithms" could not be implemented due to the limited capacity of the computer hardware used in many mining …

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The economics of computerized open-pit design

Yves Lizotte Department of Mining & Metallurgical Engineering, McGill University, Montreal, Que, H3A 2A7, ... This paper presents the economic aspects of computerized open-pit design. The objectives of open-pit design and the design methods are reviewed. Factors to be considered in establishing the profit matrix are detailed and …

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Open Pit Design Economics

The economic limit of an open pit mining operation is dictated by three basic elements- cut-off grade, stripping ratio and slope angle. Although these elements are interrelated, they are functions of a number of independent parameters, which are too numerous to list completely. Simply stated, the following relationships are true:

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Classification of the open-pit mining objects according to economic …

As practice has shown, filling the internal mined-out space of an open pit and its individual sections with overburden rocks is the main measure that contributes to the rational use of the land ...

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A New Cost Model for Estimation of Open Pit …

The use of the proposed approach during transition from open pit mining to the open-underground mining allows us to improve the economic, environmental and social indicators of the functioning of ...

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Open pit optimization processes of okobo coal mine …

The development of the "know-how" to improve economics of open pit mining projects through the use of mathematical optimization techniques goes back to early 1960's. Unfortunately, up until ...

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Forecasting mining capital cost for open-pit mining …

The advanced techniques in mining industry are also the influence methods on MCC as well as NPV of an open-pit mine (Demirel et al., 2018; Mai et al., ... Open pit optimization-strategies for improving economics of mining projects through mine planning. 17th International Mining Congress and Exhibition of Turkey (2001), pp. 117-121. …

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