Дисертації з теми "Open pit mining system"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-50 дисертацій для дослідження на тему "Open pit mining system".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Cetin, Necmettin. "Open Pit Truck /shovel Haulage System Simulation." Phd thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605499/index.pdf.
Повний текст джерелаs method of mean comparison test is carried out to compare the basic dispatching rules. From the results of statistical analysis, it is concluded that the effects of basic truck dispatching rules on the system performance are not significant. But, the main factors affecting the performances are the number of trucks, the number of shovels, the distance between the shovels and dump site, finally the availability of shovel and truck resources. Also, there are significant interaction effects between these main factors. Finally, an adaptive rule using the standardized utilization of shovels and trucks is developed.
Radlowski, Jacek K. "In-pit crushing and conveying as an alternative to an all truck system in open pit mines." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28512.
Повний текст джерелаApplied Science, Faculty of
Mining Engineering, Keevil Institute of
Graduate
Kolb, William Edward 1960. "MICROCOMPUTER BASED AUTOMATIC TRUCK DISPATCHING - SYSTEM MODELING AND SIMULATION (MINING, SOFTWARE, ALGORITHM, OPEN-PIT)." Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/292092.
Повний текст джерелаMay, Meredith Augusta. "Applications of Queuing Theory for Open-Pit Truck/Shovel Haulage Systems." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/19218.
Повний текст джерелаMaster of Science
Patterson, Samuel R. "Optimising the operational energy efficiency of an open-pit coal mine system." Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/95087/1/Samuel_Patterson_Thesis.pdf.
Повний текст джерелаSperling, Tony. "Risk-cost-benefit framework for the design of dewatering systems in open pit mines." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/31873.
Повний текст джерелаScience, Faculty of
Earth, Ocean and Atmospheric Sciences, Department of
Graduate
Vasquez, Coronado Pedro Pablo. "Optimization of the Haulage Cycle Model for Open Pit Mining Using a Discrete-Event Simulator and a Context-Based Alert System." Thesis, The University of Arizona, 2014. http://hdl.handle.net/10150/321594.
Повний текст джерелаHunter, Graham C. "Economic assessment of open pit blasting." Thesis, University of Nottingham, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292230.
Повний текст джерелаEsfahanian, Ehsan. "Hybrid electric haulage trucks for open pit mining." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/48493.
Повний текст джерелаApplied Science, Faculty of
Mining Engineering, Keevil Institute of
Graduate
Bastos, Guilherme Sousa. "Methods for truck dispatching in open-pit mining." Instituto Tecnológico de Aeronáutica, 2010. http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=1098.
Повний текст джерелаAlbor, Consuegra Francisco. "Exploring stochastic optimization in open pit mine design." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=92379.
Повний текст джерелаDepuis quelques années, de nouvelles méthodes ont été développées pour intégrer l'incertitude dans l'optimisation de la planification de la production de la vie-de-mine i.e. life-of-mine (LOM). Cette thèse se sert de deux méthodes d'optimisation stochastique : recuit simulé (RS) et programmation en nombres entiers stochastique (SIP); les deux méthodes sont programmées dans le cadre des besoins des applications d'exploitation de la simulation stochastique et modélisation d'incertitude. Pour le cas de RS, le deuxième chapitre de la thèse décris le cas d'un dépôt de cuivre où dix réalisations simulées sont suffisantes pour fournir des résultats stables d'optimisation de LOM. En outre, l'étude prouve que les véritables limites optimales choisies de mine sont plus grandes que celles dérivées par l'optimisation conventionnelle. Des limites stochastiquement optimisées de mine s'avèrent environ 17% plus grandes, en termes de tonnage total, que les limites optimales (déterministes) conventionnelles de mine. La différence ajoute un an d'exploitation et approximativement 10% de valeur nette additionnel (NPV) une fois comparée au NPV des limites optimales conventionnelles de mine et une cédule de production produit stochastiquement avec le même algorithme de RS. Dans le troisième chapitre de la thèse, l'optimiseur basé sur SIP est utilisé en vue d'intégration de l'inceritude dans le processus de la conception de fosses emboîtées. Les résultats montrent la sensibilité du NPV à la conception de fosses emboîtées de commencement et intermédiaires aussi bien que la conception de la fosse emboîtée du fond de la mine. La nouvelle approche a produit une augmentation de ~30% dans le NPV une fois comparée à l'approche conventionnelle. Les différences rapportées sont dues aux différents cédules de production, du taux de décapage du stérile et d'une extension des limites de la mine qui ont produit ~5.5 mille tonnes supplémentaires
Amankwah, Henry. "Mathematical Optimization Models and Methods for Open-Pit Mining." Doctoral thesis, Linköpings universitet, Optimeringslära, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-70844.
Повний текст джерелаMeagher, Conor John. "On the directed cut polyhedra and open pit mining." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=96733.
Повний текст джерелаDe nombreux aspects de la planification d'une mine à ciel ouvert peuvent être modélisés comme des problèmes d'optimisation combinatoire. La première partie de cette thèse passe en revue quelques méthodes de planification existantes dans la littérature et certaines de leurs lacunes. Plusieurs problèmes sont liés au "partially ordered knapsack (POK)" problème avec contraintes de type sac à dos. Il s'agit d'un cas particulier du problème de coupe maximale dans un graphe dirigé avec des contraintes de type sac-à-dos sur les arcs de la coupe.La contribution majeure de cette thèse est l'étude du cône et du polytope des coupes dirigées, lesquels sont respectivement l'enveloppe convexe et l'enveloppepositive de toutes les coupes d'un graphe dirigé complet.Plusieurs résultats sur la structure polyèdrale des ces polyèdres sont présentés.Une relation entre les polyèdres de coupes dirigées et les polyèdres de coupes non-dirigées est établie. Cette relation permet d'obtenir des familles de facettes définissant des inégalités valides pour les polyèdres de coupes dirigées à partir desinégalités valides et des facettes du polyèdre de coupes non-dirigées.Un algorithme polynomial pour le polytope des coupes non-dirigées est proposé dans le cas particulier d'une fonction objectif ayant la même valeur optimalepour deux relaxations, le polytope métrique enraciné et le polytope métrique. Les projections du polytope de coupes dirigées sur les arcs d'un graphe dirigé sont également étudiées. Une méthode de projection intitulée "élimination triangulaire" est généralisée du cas non-dirigé au cas dirigé.Le problème qui consiste à sélectionner d'une grille 2D un ensemble de sommets connectés de valeur maximale est également étudié. Dans le contexte des mines, les sommets sont les blocs et la grille 2D est un banc. Un résultat de complexité établissant la NP-complétude de ce problème est présenté. Un algorithme "pipage rounding" qui arrondit la solution de la relaxation linéaire a été implémenté pour résoudre le problème de conception de "pushbacks". Cet algorithme simple et efficace a été testé sur des données réelles et a permis d'obtenir des solutions très proches de la solution optimale (écart de 6.4% par rapport à des données réelles).
Mamurekli, Deniz. "Blast-induced ground vibration modelling in open-pit mines." Thesis, University of Nottingham, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357797.
Повний текст джерелаLlana-Rodriguez, A. H. "Orebody modelling and open pit optimization using exploration data." Thesis, University of Nottingham, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355441.
Повний текст джерелаDunstan, Steven Paul. "Octree solid modelling applications in geology and open pit design." Thesis, Imperial College London, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296412.
Повний текст джерелаZhao, Yixian. "Algorithms for optimum design and planning of open-pit mines." Diss., The University of Arizona, 1992. http://hdl.handle.net/10150/185842.
Повний текст джерелаMousavi, Nogholi Amin Alah. "Optimisation of open pit mine block sequencing." Thesis, Queensland University of Technology, 2015. https://eprints.qut.edu.au/86697/1/Amin%20Alah_Mousavi%20Nogholi_Thesis.pdf.
Повний текст джерелаHardy, Raymond J. "Selection criteria for loading and hauling equipment - open pit mining applications." Thesis, Curtin University, 2007. http://hdl.handle.net/20.500.11937/1812.
Повний текст джерелаHardy, Raymond J. "Selection criteria for loading and hauling equipment - open pit mining applications." Curtin University of Technology, Western Australian School of Mines, 2007. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=118304.
Повний текст джерелаFrom a unit-cost perspective it is better to under-load than overload mining trucks. Where unit production cost is more important than absolute productivity, under-trucking is favoured compared with over-trucking loading equipment. Bunching of mining trucks manifests as a queuing effect – a loss of effective truck hours. To offset the queuing effect, required productivity needs to be adjusted to anticipate “bunching inefficiency”. The “basic number of trucks” delivered by deterministic estimating must provide for bunching inefficiency before application of simulation applications or stochastic analysis is used to determine the necessary number of trucks in the fleet. In difficult digging conditions it is more important to retain truck operating rhythm than to focus on achieving target payload by indiscriminately adding loader passes. Where trucks are waiting to load, operational tempo should be restored by sacrificing one or more passes. Trucks should preferably be loaded by not more than the nominal (modal) number plus one pass. The research has: • Identified and investigated attributes that affect the dispersion of truck payloads, bucket loads, bucket-cycle time, loading time and truck-cycle time. • The outcomes of the research indicate a need to correlate drilling and blasting quality control and truck payload dispersion. Further research can be expected to determine the interrelationship between accuracy of drilling and blasting attributes including accuracy of hole location and direction. • Preliminary investigations indicate a relationship between drill-and-blast attributes through blasting quality control to bucket design, dimensions and shape; also discharge characteristics that affect bucket cycle time that needs further research.
Maran, Juliano. "Study of truck allocation and truck dispatching problems in open pit mines." Thesis, Virginia Tech, 1987. http://hdl.handle.net/10919/45807.
Повний текст джерелаIn recent years, fierce competition, rising production costs and depressed prices for mineral products, have forced mining companies to find ways to improve efficiency and lower production costs. Given the fact that loading and hauling operations account for up to 60 % of the total costs in surface mining, the optimization and control of these operations can provide substantial reductions in the costs.
Assignment of truck to shovels has been traditionally performed by fixed truck allocation and by truck dispatching. Several operations research and simulation techniques, which can be used to solve problems concerning surface mining operations, are discussed. The types of problems addressed are: how to allocate trucks to loading equipment, how to evaluate the performance of an existing operation, and how to predict the performance of a future system.
For truck allocation, operations research methods such as: dynamic programming, integer programming, and heuristic algorithms are discussed. These methods are used mainly for decision making purposes. Queuing theory techniques, also analyzed, are used mainly for evaluation purposes.
Master of Science
Farrelly, Christopher Terence. "Risk quantificaiton in ore reserve estimation and open pit mine planning /." St. Lucia, Qld, 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16453.pdf.
Повний текст джерелаLin, Wei. "Production Scheduling of an Open-pit Mining Complex with Waste Dump Constraints." Thesis, Curtin University, 2021. http://hdl.handle.net/20.500.11937/88095.
Повний текст джерелаSoeller, Christopher Philip. "Investigation of the Hydromechanical Effects of Lithostatic Unloading in Open-pit Mines." Thesis, Boston College, 2016. http://hdl.handle.net/2345/bc-ir:107281.
Повний текст джерелаThe stability of open-pit mine walls and other geotechnical infrastructure is a function of geometry, material properties and groundwater conditions (pore pressure distribution). A portion of failures are attributed to the effect of pore water pressures within the mine wall slopes. The objective of this research was to investigate the interaction between the increments/decrements of stresses that occur during the lithostatic unloading/excavation of the pit and the increments/decrements of pore water pressures. This interaction can be described by the theory of linear poroelasticity, which incorporates the coupling between changes in fluid pressure and changes in stress in porous media. The results of this thesis are displayed in the form of contour charts and graphs
Thesis (MS) — Boston College, 2016
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Earth and Environmental Sciences
Chung, Joyce Sze Yee. "A Mixed Integer Programming Approach for Transitioning from Open-pit to Underground Mining." Thesis, Curtin University, 2020. http://hdl.handle.net/20.500.11937/84566.
Повний текст джерелаTipe, Luis Alberto Martinez. "Strategic project evaluation for open pit mining ventures using real options and allied econometric techniques." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/48334/1/Luis_Martinez_Thesis.pdf.
Повний текст джерелаCai, Wenlong. "Application of network flow and zero-one programming to open pit mine design problems." Diss., The University of Arizona, 1989. http://hdl.handle.net/10150/184797.
Повний текст джерелаGodoy, Marcelo. "The effective management of geological risk in long-term production scheduling of open pit mines ?" [St. Lucia, Qld.], 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17184.pdf.
Повний текст джерелаPelly, Frederick Douglas Peter. "Guidelines to the evaluation of selectively mined, open pit gold deposits during the exploration stage of mine creation." Thesis, Rhodes University, 1992. http://hdl.handle.net/10962/d1005582.
Повний текст джерелаNascimento, Leite Andre. "Stochastic optimization approaches to open pit mine planning : applications for and the value of stochastic approaches." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=116039.
Повний текст джерелаThe application of stochastic approaches to the mine production schedule problem is recent and additional testing is required to better understand these tools and to define the value of a stochastic solution as compared to the conventional result. Two stochastic schedulers are tested in a low-grade variability copper deposit, optimization parameters are discussed and their results compared with a conventional schedule.
The first method uses a stochastic combinatorial optimization approach based on simulated annealing to address the mine production schedule problem. The method aims for maximization of the net present value (NPV) of the project and minimization of deviations from the production targets. These objectives are attained by incorporating grade uncertainty into the mine production schedule problem formulation. The second method formulates the problem as a stochastic integer programming problem, in which the objective is the maximization of the projects' NPV and the minimization of production targets deviations. The model can also manage how the risk of deviating from the targets is distributed between production periods.
Both stochastic approaches were tested in a low-grade variability copper deposit. In both case studies, the value of a stochastic solution is demonstrated to be higher than the conventional one. This fact demonstrated the misleading results that a conventional schedule may produce and shows the importance of not ignoring the presence of uncertainty when defining the mine production schedule for a project.
Duzgun, Ozkan. "Assessment Of Velocity Of Detonation At Kumtor Open Pit Gold Mine." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613676/index.pdf.
Повний текст джерелаs and their ideal detonation values. It is found that the VOD of both explosives increases as the blast hole diameter and the degree of confinement increases. In addition to this, VOD of bulk ANFO decreases when it gets wet in the blast hole. Another finding is that, proportion of bulk emulsion ingredients has influence on its VOD. This research study provides a good understanding to use suitable explosive in existing rock conditions in Kumtor Open Pit Gold Mine.
Сістук, Володимир Олександрович, Владимир Александрович Систук та Volodymyr O. Sistuk. "Підвищення показників маневреності кар’єрних самоскидів з електромеханічною трансмісією". Thesis, Друкарня ФОП Щербенюк С. Г, 2014. http://eadnurt.diit.edu.ua:82/jspui/handle/123456789/2267.
Повний текст джерелаUK: АНОТАЦІЯ Дисертацію присвячено підвищенню показників маневреності кар’єрних самоскидів з електромеханічною трансмісією. Вперше науково обґрунтовано можливість та доцільність застосування примусового управління обертанням задніх ведучих коліс кар’єрного самоскида з електромеханічною трансмісією, що дозволяє їм виконувати маневри із використанням силового довороту. Вперше розроблено математичну модель силового довороту, яка дозволяє визначити відношення кутових швидкостей задніх ведучих коліс окремо правого і лівого борту машини і її показники маневреності відповідно до коефіцієнта зчеплення на основі вперше встановлених аналітичних залежностей. Аналітична залежність відношення кутових швидкостей задніх ведучих коліс від коефіцієнта зчеплення доведена методом лабораторного експерименту на створеній лабораторній моделі, яка дозволяє моделювати процес виконання маневру колісною машиною при різних способах повороту. Створено алгоритм примусового управління обертанням задніх коліс кар’єрного самоскида, оснащеного електромеханічною трансмісією. Відповідно до розробленого алгоритму управління виготовлено електронний блок, який разом із додатковою датчиковою апаратурою, що встановлюється на кар’єрний самоскид БелАЗ-7513В, представляє собою систему примусового управління поворотом.
RU: АННОТАЦИЯ Диссертация посвящена вопросу улучшения маневренности карьерных самосвалов с электромеханической трансмиссией для повышения эффективности их работы в стесненном пространстве рабочих зон глубоких карьеров. В работе проведен комплекс теоретических, лабораторных, промышленных исследований маневренности карьерных самосвалов с электромеханической трансмиссией при выполнении маневров с применением силового доворота. Разработана математическая модель силового доворота колесной машины. Впервые установлена аналитическая зависимость отношения угловых скоростей задних ведущих колес отдельно правого и левого борта от коэффициента сцепления, которая позволяет разработать рациональный алгоритм принудительного управления вращением задних колес карьерного самосвала. Впервые установлены аналитические зависимости, позволяющие определить показатели маневренности колесной машины на основе требуемого отношения угловых скоростей задних ведущих колес. Математическое моделирование с использованием разработанной модели позволило установить, что для карьерного самосвала БелАЗ-7513 минимальный радиус поворота в сложных условиях эксплуатации (на увлажненном грунтовом покрытии основных трасс с коэффициентом сцепления φ=0,34) при выполнении маневра с использованием силового доворота может быть уменьшен с 13,0 до 10,1 м. Установленные математические зависимости проверены экспериментальным путем с применением лабораторной модели, созданной в соответствии с масштабным коэффициентом, равным 12,0, в качестве которого выступало отношение радиуса колеса карьерного самосвала к радиусу колеса модели. Лабораторная модель позволяет моделировать процесс выполнения маневра колесной машиной при различных способах поворота путем принудительного воздействия на частоты вращения электродвигателей задних колес. Разработан и реализован на карьерном самосвале БелАЗ-7513В в условиях ПАО «Центральный ГОК» алгоритм принудительного управления вращением задних колес карьерного самосвала с электромеханической трансмиссией. Отклонение между расчетным 100 % (1,12 м) минимальным радиусом поворота лабораторной модели и полученным в результате эксперимента составило 10,7 % (1,0 м), отклонение между расчетным 100% (10,38 м) минимальным радиусом поворота карьерного самосвала и полученным путем промышленных испытаний составило 7,9 % (11,30 м), что подтвердило соответствие аналитических и экспериментальных показателей. Использование системы принудительного управления поворотом на карьерных самосвалах с электромеханической трансмиссией позволяет повысить техническую производительность машин на 6,1 % путем уменьшения времени их маневрирования до 1,4 мин, установленного с помощью хронометража в промышленных условиях, а также позволяет снизить топливо-энергетические затраты на 2,3 %. Материалы диссертационных исследований приняты на предприятиях ПАО «Центральный ГОК», ПАО «АрселорМиттал Кривой Рог» и ООО «Кривбасс-БелАЗ-Сервис СП». Расчетный экономический эффект в условиях ПАО «АрселорМиттал Кривой Рог», полученный за счет повышения производительности карьерных самосвалов БелАЗ-7513 на 5,9%, для существующего парка из 8 машин составил 678,0 тыс. грн. / год. Таким образом, впервые научно обоснованы возможность и целесообразность применения принудительного управления вращением задних ведущих колес карьерного самосвала с электромеханической трансмиссией при маневрировании, что обеспечивает уменьшение радиуса поворота машины, повышая производительность промышленного автотранспорта карьеров.
EN: THE SUMMARY The thesis is dedicated to increasing of open pit trucks with electrical transmission indices of maneuverability. For the first time there has been scientifically grounded possibility and suitability of usage of forced controllability of rear leading wheels of open pit truck with electrical transmission that enables them to carry out maneuvers with the usage of a forced additional turn. For the first time there has been worked out mathematical model of a forced additional turn which enables to determine a correlation of angular velocity of rear leading wheels of starboard and port sides of a car and its indices of maneuverability relative to a friction coefficient on the basis of firstly determined analytical dependence. Analytical dependence of relation of rear leading wheels angular velocity to a friction coefficient has been proved with laboratory experiment method on a created laboratory model which enables to simulate the process of a wheel vehicle maneuver performing with various means of a turn. An algorithm of a forced controlling of rear wheels rotation of open pit truck with electrical transmission has been created. In accordance with the created algorithm an electrical block which coupled with additional sensor equipment that is installed on a pit truck BelAZ-7513B representing a forced turn controlling system has been manufactured.
Криворізький національний університет
Buyukyildirim, Kursad. "Ground Vibration Assessment At Y-3 Panel Of Tuncbilek Open Pit Lignite Mine." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606668/index.pdf.
Повний текст джерелаrgü
ç
village is within the close neighbourhood of the Western Lignite Corporation Y-3 panel. Although the nearest part of the mine is 1100 m and the farthest part is 2500 m from the village at present, some of the villagers complained about the ground vibration at the past. Therefore the assessment of damage risk and, if any, control and minimization of vibrations constitutes the aim and the scope of this research work. The researh work consists of monitoring of vibration, characterising of the seismic waves by full wave form analysis, and determination of magnitude and frequency of the waves from round blasting practice. Also dominant frequencies are determined, using single-hole blasting records by special software. The analyses are continued by a critical discussion and evaluation, and, proposals for new firing methods are made. The proposed firing methods are validated by further monitoring. As a result the best blasting practice was selected and offered to control and minimize the ground vibration.
Rodovalho, Edmo da Cunha. "An innovative approach for controlling operational parameters in open pit mining to reduce costs and environmental impacts." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3134/tde-18012017-151352/.
Повний текст джерелаNa atualidade, a indústria de mineração possui como principal desafio alavancar sua produtividade, controlar custos e reduzir impactos ambientais. Muitas operações de mineração exigem transporte em pequenas distâncias. A comparação de diferentes opções de transporte em distâncias curtas considerando a eficiência energética é uma necessidade de operações de lavra a céu aberto, mas existem poucos estudos recentes que priorizam esta variável em projetos de mineração. As operações de carga e transporte são amplamente dependentes de combustíveis fósseis. Essas operações também necessitam de pneus como um importante insumo. Existem alguns trabalhos que relacionam o consumo de combustíveis e o desgaste dos pneus a variáveis operacionais, mas uma metodologia que identifique as variáveis de maior impacto frente a condições específicas ainda não está disponível. O presente trabalho fornece novos métodos de simulação para equipamentos alternativos, consumo de combustíveis e gestão do desgaste de pneus. Análises de regressão linear múltipla, simulações e ferramentas de desenho de mina permitem identificar e controlar variáveis ligadas ao consumo de combustíveis, desgaste de pneus e seleção de equipamentos. Os estudos envolvendo equipamentos alternativos alcançaram uma redução de 14% no consumo de diesel e um aumento de 16% na produtividade. Com relação às técnicas de gestão do consumo de combustível aplicada aos caminhões observou-se uma redução de 10%. Considerando o sistema de gestão de desgaste de pneus, a aplicação do método proposto possui um potencial de evitar o descarte de 8,9 t de borracha para pneus em apenas um trimestre.
Schäfer, Fábio. "Desenvolvimento de uma sistemática de melhoria do desempenho econômico de indústrias extrativas : o caso de uma mineração a céu aberto." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/61383.
Повний текст джерелаIn the light of globalization, the enterprise environments are becoming more competitive; thus, increases the concern and the need to provide a management information system that is effective, reliable and relevant to assist managers to make intelligent decisions. With the use of principles and costing methods linked to services inherent in mining operations and methods, this work is intended mainly identify and understand the weaknesses of the current costing and production system and structure a systematic that supports performance evaluation productive-economic-financial in surface mining. The second objective of this work is to use standard cost method linked to production and business rules and validate it by comparing the accomplished against foreseen in surface mining, through the use of concepts of wastes, the principle costing of partial absorption, cost control and management for production to evaluation of results. The mineral extraction unit studied uses the open pit mining method and outsources the mining operations of pre stripping, drilling, blasting, rock excavation, loading and transportation. The outsourced company uses the costing principle of total absorption and the costing method is the cost centers. Thus, the systematic that support the evaluation of productive-economic-financial performance and the standard cost method were developed and validated in three outsourced services with the goal of verifying its functionality and practicality. Therefore, the new management information assists the manager to identify the productivity and profitability of the enterprise and the results of its operations and services, in addition to all of the existing management costs.
Carvalho, Mara Gilene Alves de. "Estratégia ambiental pró-ativa: sequenciamento de lavra concomitante com a disposição de estéril dentro da mina." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/3/3134/tde-03072009-150534/.
Повний текст джерелаThis paper presents a innovative approach for an environmentally pro-active mine scheduling process. The proposed methodology has been developed for identifying a mine sequence that meets all operational and economical constraints in iron-ore mining, and takes into account a pro-active approach for scheduling the mine according to environmental criteria. The proposed methodology allows a significant reduction of the environmental impact related to the mining operation without compromising productivity and the economical feasibility of the mine. The methodology has been applied to a case study of iron ore mining in Brazil, where the expected benefits have been proven.
De, Carli Carla. "Análise de projetos limite : lavra a céu aberto x lavra subterrânea." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/77760.
Повний текст джерелаOver the years, the society has become progressively dependent on mineral resources for its operation and for development of products. The majority of the things that surround the men needs some kind of mineral material as raw material for its manufacture. Therefore, increasingly, mining has been studied aiming to improve and develop methods of mineral extraction. There are two ways that are utilized to mineral extraction, one by open pit methods (OP) e another by application of underground methods (UG). The definition of which one should be applied in each case depends on many factors, such as depth and geometry of the mineral body, strength of the mineralized and bounding rock, among others, but at the end, economic aspects are predominant for the definition of viability of the methods. However, there are some cases where the best choice to mine the deposit is not one of these options, but the combination of both methods, it means, the application of open pit mining followed by extraction of remaining resources by underground mining. The great challenge, in these cases, is to define what is the right moment for the transition of the methods, making sure that the results are optimized and one method do not impede the development of the other one. In this sense, it is necessary to analyze both options individually, mining the deposit only by open pit and mining only by underground, and also analyze the combination of the two methods, comparing these options technically and economically at the end, and then decide which project alternative is the best for each case.
Zamora-Paredes, V., V. Zamora-Paredes, L. Arauzo-Gallardo, C. Raymundo-Ibanez, and Moises Perez. "Optimal mesh design methodology considering geometric parameters for rock fragmentation in open-pit mining in the Southern Andes of Peru." Institute of Physics Publishing, 2020. http://hdl.handle.net/10757/651802.
Повний текст джерелаNeshuku, Martha Nyambali. "Comparison of the performance of two atmospheric dispersion models (AERMOD and ADMS) for open pit mining sources of air pollution." Diss., University of Pretoria, 2012. http://hdl.handle.net/2263/25835.
Повний текст джерелаDissertation (MSc)--University of Pretoria, 2012.
Chemical Engineering
unrestricted
Shu, Biao. "Rock Slope Stability Investigations In Three Dimensions For A Part Of An Open Pit Mine In USA." Diss., The University of Arizona, 2014. http://hdl.handle.net/10150/338701.
Повний текст джерелаEsenkaya, Ercan. "Investigation Into The Effect Of Meteorological Parameters On The Airborne Dust Concentration At Ovacik Open Pit Gold Mine." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12604938/index.pdf.
Повний текст джерелаKlingmann, Scot. "The application of a digital photogrammetry system to structural mapping at a large open pit mine." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ37959.pdf.
Повний текст джерелаQureshi, Muhammad Asim. "An Implementation of Ant Colony and Genetic Algorithm based Hybrid-Metaheuristic for Cut-off Grade Optimization in Open-Pit Mining Operations." Thesis, Curtin University, 2017. http://hdl.handle.net/20.500.11937/68406.
Повний текст джерелаVieira, João Carlos. "Determinação e quantificação de elementos de relevância em infraestrutura de mina." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/115577.
Повний текст джерелаThis study presents, in a systematic way, the importance of the infrastructure in the open pit mining, determining the main activities of this operation and the impacts and benefits from changes implemented measured by operating productivity indicators and financial results. Some major activities such as the reconfiguration of the slope faces by the comparative performance of bulldozer and backhoe; the establishment of standards for the design of structural and functional layers of the mine haul roads; measure the benefits of the construction and maintenance of roads, the performance of trucks and bulldozers, through case studies show that the application of appropriate techniques can modify the operating result. The methodology addresses the importance of infrastructure and auxiliary equipment fleet in the operating cycle, proposing a correct and systematic application, based on demand and auxiliary activities that provide operating conditions for activities "that create value", supporting the achievement of the goals established in the production plan. The main results ranging from improved operational safety, company image, financial results, the best use of mineral resources, directly impacts on the business sustainability. Through the cases discussed in this work, it is concluded that the performance of the open pit mining is strongly dependent on the focus given to the mine infrastructure wich means, the quality of the tracks, adequacy of the loading spots, operating condition of waste dumps or ore bins, surface drainage, working methods and operational discipline, generating gains and/or losses ranging from small amounts to several times the capacity of the covered process.
G, Mastrorocco. "Use of innovative technologies for the analysis of brittle failure mechanisms applied to underground and open pit marble mines." Doctoral thesis, Università di Siena, 2018. http://hdl.handle.net/11365/1039639.
Повний текст джерелаZhao, Lei. "Three-dimensional numerical study on the batter instability mechanism of Maddingley Brown Coal Open Pit, Victoria, Australia using PLAXIS 3D." Thesis, Federation University Australia, 2019. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/172972.
Повний текст джерелаDoctor of Philosophy
Hoang, Hoa Thi Bich [Verfasser], Reto [Akademischer Betreuer] Gieré, and Stefan [Akademischer Betreuer] Hergarten. "Mineralogical and chemical characterization of airborne dust particles and their environmental effects in the open-pit coal mining area in Quang Ninh, NE Vietnam." Freiburg : Universität, 2017. http://d-nb.info/1149507756/34.
Повний текст джерелаKoerting, Friederike Magdalena [Verfasser], Uwe [Akademischer Betreuer] Altenberger, Helmut [Akademischer Betreuer] Echtler, Uwe [Gutachter] Altenberger, Konstantinos [Gutachter] Nikolakopoulos, and Christian [Gutachter] Rogass. "Hybrid imaging spectroscopy approaches for open pit mining : applications for virtual mine face geology / Friederike Magdalena Koerting ; Gutachter: Uwe Altenberger, Konstantinos Nikolakopoulos, Christian Rogass ; Uwe Altenberger, Helmut Echtler." Potsdam : Universität Potsdam, 2021. http://d-nb.info/1230494170/34.
Повний текст джерелаÖzdemir, Ismet [Verfasser], Per Nicolai [Akademischer Betreuer] Martens, and Christian [Akademischer Betreuer] Niemann-Delius. "A Decision Support System and Cost-Performance Analysis for Dust Control at Open-Pit Coal Mines / Ismet Özdemir ; Per Nicolai Martens, Christian Niemann-Delius." Aachen : Universitätsbibliothek der RWTH Aachen, 2015. http://d-nb.info/1127143654/34.
Повний текст джерелаCandia, Renan Collantes. "Escavação de rochas com furos de grande diâmetro na mineração a céu aberto." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3134/tde-19092006-160821/.
Повний текст джерелаThis dissertation presents a bibliographical review of the main aspects involved in the open pit blasting operation using large diameter blastholes. The work displays the method of rotary drilling, being the most frequent used in the execution of this mining unitary operation. Here is presented a study of the main blasting agents that contribute to the increasing application of large diameter blastholes in the mining industry, especially in the field of metallic ores. The properties of the rock mass are analysed, in the determination of the powder factor and its influence on the results of rock excavation by explosives. An analysis of the methodology used for the determination a shot plan is carried out based on the existing interrelation between diverse geometric elements involved. The crater theory is also presented as an alternative methodology for the same purpose. Finally, the main environmental impacts caused by blasting in the rock excavation are discussed.