Roussos Dimitrakopoulos
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91 results — page 3 of 5
This paper analyzes the effects of geological heterogeneity representation in a producing reservoir, when different stochastic simulation methods are used, s...
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For pattern-based simulation methods such as SIMPAT, filtersim, wavesim, ect, patterns are stored by scanning a training image with a sliding template. Dimen...
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The traditional mine planning framework employs a flawed approach in the design of ultimate pit limits and phases. Conventional methods arbitrarily confine ...
BibTeX referenceHyper-heuristic approaches for solving stochastic optimization formulations of mineral value chains
This paper presents three hyper-heuristic approaches for the stochastic open-pit mine production scheduling problem with one processing stream (SMPS) and one...
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Complex polymetallic mining projects with multiple processing streams tend to require tight blending constraints, with different operational and processing t...
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With the advent of inexpensive sensors and digital storage, increasing amounts of data about a mining complex can be collected. This can include camera imagi...
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Every mining operation faces a decision on additional drilling at some point during its lifetime. The two questions that always arise with this decision are ...
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Recent developments in the global rare earth elements (REE) sector have caused a surge in motivation for nations outside of China to secure their own REE sup...
BibTeX referenceA dynamic-material-value-based decomposition method for mineral supply chain optimization
A decomposition method is developed to optimize a mineral value chain composed of a one or multiple mines and a material flow circuit. In the proposed decomp...
BibTeX referenceA stochastic optimization formulation for the transition from open pit to underground mining
As open pit mining of a mineral deposit deepens, the cost of extraction may increase up to a threshold where transitioning to mining through underground meth...
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High-order sequential simulation techniques for complex and non-Gaussian spatially distributed variables were developed over the last few years. This paper p...
BibTeX referenceOptimizing a multi-pit mining complex with intricate blending requirements under supply uncertainty
Mineral value chains consist of material from multiple sources, several processing streams, and transportation systems that combine to generate various salea...
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Over the past several years, there has been substantial progress in developing new stochastic mine planning optimization models and computationally efficient...
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This paper presents a new high-order, non-stationary sequential simulation approach, aiming to deal with the typically complex, curvilinear structures and hi...
BibTeX referenceUnderground long-term mine production scheduling with integrated geological risk management
A stochastic integer-programming (SIP) model is presented to optimize long-term scheduling of underground mine operations while considering geological uncert...
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The optimization of mine complexes and related value chains is a challenging problem due to the simultaneous presence of a highly-dimensional decision space,...
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This paper addresses the optimization of mineral supply chain operations under metal and material type uncertainties. A mathematical model to simultaneously ...
BibTeX referenceOptimal mining rates revisited: Managing mining equipment and geological risk at a given mine setup
This paper presents a mixed integer programming formulation dealing with the effective minimisation of risk incurred when optimizing mining production rates ...
BibTeX referenceMultiple-point simulation of Olympic Dam copper deposit, Australia, using wavelet analysis
Traditional geostatistical simulation methods assume that the first two order statistics are sufficient to model mineral deposits. However, these methods are...
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Modeling and assessing spatial uncertainty of mineral deposits is critical for capital investments in mining projects. However, traditional approaches for mo...
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