A common casualty of modern open-pit mine optimization is the assurance that the resulting design is actually achievable. Optimized mine plans that consider value and a bare minimum of precedence constraints do not, in general, translate into practical, operational mine designs that can be used in the field. Ultimate pits may come to a sharp …

There are many deposits that have the potential to be mined by a combined method of open-pit and underground. In this manner, the most sensitive problem is the determination of the optimal transition depth from open-pit to underground or vice versa. To calculate this depth, a model based on block economic values of open-pit and …

Abstract and Figures. The ultimate pit limit optimization (UPLO) serves as an important step in the mine planning process. Various approaches of maximum flow algorithms such as pseudo-flow 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 economics of open pit mining projects through the use of mathematical optimization techniques goes back to early 1960's.

We present a full computational study of the two policies in which we perform output analysis on key metrics of the open-pit mine simulation. Results indicate that the MIP-based dispatching policy consistently outperforms the more commonly-used average flow rate dispatching policy on open-pit mines in a wide variety of operational settings. …

Mathematical Optimization Models and Methods for Open-Pit Mining. H. Amankwah. Published 2011. Engineering, Mathematics. Open-pit mining is an operation in which blocks from the ground are dug to extract the ore contained in them, and in this process a deeper and deeper pit is formed until the mining operation ends. ... View Paper.

Open pit limit optimization considering the pumped storage benefit after mine closure: a case study ... Join for free. Publisher Full-text 1. Access to this full-text is provided by Springer Nature.

Pit optimization is used to define the most profitable pit shell for a given set of economic parameters. The economic parameters include the metal prices, processing recoveries, and site operating costs. Normally when optimization is done, a range of metal prices or Revenue Factors ("RF") is used to develop a series of nested shells to ...

Definition of the optimum open pit, whether an intermediate phase or final design, will be sensitive to many factors. The most basic will include geological and mining constraints, mining and processing costs, pit slopes and product prices. The application of the three dimensional Lerchs-Grossmann pit optimization procedure to this task is described for …

Download Free PDF. A Study on the Optimization Algorithms for Determining Open-Pit and Underground Mining Limits ... remove a cone [34]. E) GENETIC ALGORITHM (GA) Firstly, Denby and Scholfield (1994) employed Genetic Algorithm (GA) as a optimization tool in open pit design [35].This technique was established on the basis of a self-training …

Turan, G., Onur, A.H. Optimization of open-pit mine design and production planning with an improved floating cone algorithm. Optim Eng 24, 1157–1181 (2023). …

Open-Pit Ultimate Optimization. It is the process of ultimate limit optimization with the operational research theory or the optimization method, based on the physical model, block model, and relevant economic parameter of open-pit mine. The methods of open-pit ultimate optimization mainly include floating cone method, …

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 …

Montiel et al. [22] also presented a general optimization of underground and open-pit mining operations taking into account geological uncertainty. In this study, an extraction sequence based on ...

Join for free. Public Full-text 1 ... 1986, Application of Lerchs-Grossmann Pit Optimization to the Design of Open Pit Mines, Large Open Pit Mining Conference, The AusIMM/IE Aust Newman Combined ...

At the same time, Lerchs and Grossmann presented two novel methods to try to solve the open-pit-optimization problem: Lerchs–Grossmann 2D, which …

Request PDF | Ultimate Pit Limit Optimization Methods in Open Pit Mines: A Review | Ultimate pit limit optimization plays a major role in the mining industry as it …

This paper presents a model based on stochastic programming, seeking a balance between conflicting objectives: on the one hand, it maximizes the expected …

Introduction. The open pit mine optimization problem is concerned with the scheduling of mining activities over the life of an open pit mining project. Two variants of the problem commonly solved are (i) the ultimate pit limit problem and (ii) the open pit phase design problem. A closely related problem is the open pit production scheduling ...

@article{Bai2023OptimizationOB, title={Optimization of blasting parameters and prediction of vibration effects in open pit mines based on deep neural networks}, author={Runcai Bai and Pengfei Zhang and Zhiqiang Zhang and Xue Sun and Hong Lu Fei and Shi-Tai Bao and Gang Hu and Wenyan Li}, journal={Alexandria Engineering …

In this paper, the key group concept which mainly use for stability slope analysis is used to develop a new algorithm named "KG-PLO" to optimize open pit limits.

CHAPTER ONE: Optimal open pit design and optimal production scheduling: Literature review and survey of previous work 1 1. Optimal open pit design 2 1.1 Introduction 2 1.2 …

Repurposing a closed mine as lower reservoir is a cost-effective way for the construction of pumped storage hydropower (PSH) plant. This method can eliminate the expenses of mine reclamation, reservoir construction, and land acquisition, resulting in significant cost savings and benefits for the PSH project, known as the PSH benefit. The …

problems in open pit mine optimization. We show how these fundamental problems are formulated and how they extended within the framework of maximum satisfiability. For the remainder of the paper we first give a brief background on common elements between the three problems and an introduction to satisfiability. Then we

The current approach to solving these problems involves a mixture of optimization techniques and heuristics. This approach consists of three primary steps: Find the ultimate pit limit. Select internal phases. Determine mining and processing schedules. For the ultimate pit limit problem, the Lerchs-Grossman (LG) and Pseudoflow algorithms …

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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Benefits of Micromine's pit optimisation module: Micromine's Pit Optimisation is fully integrated within Micromine, with all parameters in one place, saving time and money by eliminating the need for data exchange. Internal and external 32- or 64-bit engines provide the flexibility to adjust the optimiser to suit the available computing ...

In a system of open pit mine, the water that comes from surface water and groundwater is collected into a temporary collecting pond which is commonly referred to as sump. This paper analyzes a case study of optimization of sump at an open pit coal mine in South Borneo. The design of sump often ignores the role of groundwater.