نتایج جستجو برای: mine pit lake

تعداد نتایج: 73796  

Journal: :Polish Journal of Environmental Studies 2022

All steps of a mining project generally disturb the environment'soriginal condition during construction. Therefore, it is crucial toimplement an appropriate mine reclamation plan throughout all mineplanning stages from sustainable and environmental point of view.Planting the suitable plant species in each step of any reclamationplan and each area is one of the necessities in this respect.Select...

Journal: :Electronic Notes in Discrete Mathematics 2010
Eduardo Moreno Daniel G. Espinoza Marcos Goycoolea

We study an extension of the precedence constrained knapsack problem where the knapsack can be filled in multiple periods. This problem is known in the mining industry as the open-pit mine production scheduling problem. We present a new algorithm for solving the LP relaxation of this problem and an LP-based heuristic to obtain feasible solutions. Computational experiments show that we can solve...

2009
Andreas Bley Ambros M. Gleixner Thorsten Koch Stefan Vigerske

This paper investigates the performance of several out-ofthe-box solvers for mixed-integer quadratically constrained programmes (MIQCPs) on an open pit mine production scheduling problem with mixing constraints. We compare the solvers BARON, Couenne, SBB, and SCIP to a problem-specific algorithm on two different MIQCP formulations. The computational results presented show that general-purpose s...

2013
Marcin Pietrzykowski Bartłomiej Woś Nicholas Haus

A main objective of restoration and afforestation at post-mining sites is establishing a long-term sustainable ecosystem which depends on adaptations of tree species and which in turn depends on the soil nutrient flux. The nutrient concentration (nitrogen (N), P, K, Ca, Mg, and sulfur (S)) of Scots pine needles was investigated in reclaimed mine soils (RMS) located at the following post-mining ...

2000
Pierre BOULANGER Jean-François LAPOINTE Winston WONG

In this paper, an infrastructure for monitoring remote equipment and solving some of the logistic challenges of operating satellite surface mines is presented. This infrastructure includes strategies for communicating timely and accurate information amongst operators, planners and supervisors, using off-the-shelf network protocols. Advanced data visualization techniques are implemented, so user...

Journal: :Math. Meth. of OR 2011
Felipe Alvarez Jorge Amaya Andreas Griewank Nikolai Strogies

This paper proposes a newmathematical framework for the open pit mine planning problem, based on continuous functional analysis. The main challenge for engineers is to determine a sequence of nested profiles maximizing the net present value of the mining operation. The traditional models for this problem have been constructed by using binary decision variables, giving rise to large-scale combin...

2008
JOHN A. ORGANISCAK John A. Organiscak W. M. RANDOLPH REED

Fugitive dust is generated along unpaved mine roads from intermitlent equipment traffic. Typically. the majority of such traffic consists of trucks hauling either mine product or waste from the surface mine pit andlor the processing plant. Fugitive dust generated along these unpaved mine roads includes particles of all sizes which become airborne. The potential hazards include the deleterious e...

Journal: :Bulletin of Engineering Geology and the Environment 2022

Almost all post-exploitation open pit mines in the world are shaped as a final water reservoir. One of main hazards is slope stability lake banks. To develop reliability methodology for assessing long-term flooded open-pit lake, back analysis was conducted using 2D and 3D large-scale numerical models Lake Most, which one largest mining lakes Europe (Czech Republic). The model built, based on si...

2016
Weili Duan Bin He Daniel Nover Guishan Yang Wen Chen Huifang Meng Shan Zou Chuanming Liu

Multivariate statistical methods including cluster analysis (CA), discriminant analysis (DA) and component analysis/factor analysis (PCA/FA), were applied to explore the surface water quality datasets including 14 parameters at 28 sites of the Eastern Poyang Lake Basin, Jiangxi Province of China, from January 2012 to April 2015, characterize spatiotemporal variation in pollution and identify po...

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