Tesi sul tema "Alum mines and mining"
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Wang, Quanxi. "Integrated stability mapping system for mines". Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4287.
Testo completoTitle from document title page. Document formatted into pages; contains ix, 145 p. : ill. (some col.), maps (some col.). Vita. Includes abstract. Includes bibliographical references (p. 118-122).
Talhi, Korichi. "Aspects of blasting in surface mines". Thesis, University of Surrey, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280422.
Testo completoJoubert, Barend Daniel. "Small-scale gold mining in southern Africa". Thesis, Rhodes University, 1992. http://hdl.handle.net/10962/d1005615.
Testo completoForrest, W. "The development of new coal mines". Thesis, University of Nottingham, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378766.
Testo completoCarr, Frank. "Government decision-making and environmental degradation: a study relating to mining activities in Papua New Guinea". Thesis, Carr, Frank (2007) Government decision-making and environmental degradation: a study relating to mining activities in Papua New Guinea. Masters by Research thesis, Murdoch University, 2007. https://researchrepository.murdoch.edu.au/id/eprint/502/.
Testo completoCarr, Frank. "Government decision-making and environmental degradation : a study relating to mining activities in Papua New Guinea /". Carr, Frank (2007) Government decision-making and environmental degradation: a study relating to mining activities in Papua New Guinea. Masters by Research thesis, Murdoch University, 2007. http://researchrepository.murdoch.edu.au/502/.
Testo completoStewart, Penelope Clair. "Minimising dilution in narrow-vein mines /". [St. Lucia, Qld.], 2005. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18948.pdf.
Testo completoSellami, Moncef. "Recoverable reserve estimation in multiple seam mines". Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-09192009-040606/.
Testo completoHarvey, Harvey Blevins Madison D. Soyini. "Mines-bodies a performance ethnography of Appalachian coal mining /". Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2006. http://dc.lib.unc.edu/u?/etd,187.
Testo completoTitle from electronic title page (viewed Oct. 10, 2007). "... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Communication Studies (Performance Studies)." Discipline: Communication Studies; Department/School: Communication Studies.
Bétournay, M. C. "The stability of shallow stopes of hard rock mines". Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=28678.
Testo completoSeveral common rock mass environments are surveyed as well as the various ways in which shallow stopes have failed. It has been found that these rock masses develop gravity-induced movement in the form of plug failures, ravelling of rock blocks, strata failures, chimneying disintegration, and rock mass block caving.
New failure-specific analytical equations are developed here for these common failure mechanisms. They address the mechanics of the failure process and incorporate the capability to arrive at the ultimate failure outline, for comparison to the location of the bedrock surface.
This research has shown that: plug failures occur along steep, uninterrupted discontinuities bounding large blocks. Plug failure potential reduces substantially with confining compressive stress, discontinuity inclination, the absence of low friction surfaces and shearing of intact rock interrupting the discontinuity. Ravelling requires little peripheral confining stress for stabilization and prevention of block falls or slides. However, inherent conditions such as shallow dipping or vertically dipping joints can cause block falls to develop to surface. Low confining stresses, resulting from multiple stope extraction in orthogonal horizontal directions, would offer conditions suitable for plug and ravelling failures. Strata failures are caused by excessive stope spans, but the limited loading received from above strata is such, that the failure cavity created is of limited vertical extent, some 25% of the stope width. Chimneying disintegration occurs in weak rock masses with low cohesion, over narrow openings that can be as deep as 275 m. The onset of chimneying disintegration can be created by compressive stresses, but develops as a result of mobilization of the rock mass by gravity in active shear. Block caving requires large spans to develop, and stabilizing could be overcome from arching stresses overcoming bulk arching strength. Controlling instability elements are tabulated for these failure mechanisms. A limit equilibrium correlation between span and cohesion for chimneying disintegration is presented, and the controlling limits between the occurrence of chimneying disintegration and block caving is discussed. Ravelling and chimneying disintegration are the most expected failure mechanisms for shallow stopes of hard rock mines. Although failure of the shallow stope may start around its periphery, stope failure to surface would likely occur in or close to the surface crown pillar.
Although the analytical equations developed require input of in situ stresses defined by numerical modelling in order to yield a precise answer, conventional numerical modelling or empirical methods are shown to be unable to predict stope failures as the analytical equations have. A step-by-step stability analysis procedure is presented, incorporating rockmass environment, expected failure mechanism(s), and applicable data gathering and anlytical methods. (Abstract shortened by UMI.)
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.
Testo completoHadjigeorgiou, John. "Studies of machine-ground interaction in surface mines". Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=41124.
Testo completoThis thesis reviews the approach and methodology adopted for the development of predictive digging models in mining. Past theoretical attempts to model soil-rock cutting processes are critically evaluated and an analytical digging model applicable to fragmented rock is proposed. Physical modelling studies, concentrating on the interaction between machine and spoil characteristics, are reported. These considered in particular the digging profile propagated by cable shovel operation, the impact of geotechnical parameters on the profile, and the efficiency of digging in fragmented rock. These were undertaken in a controlled laboratory environment based upon an instrumented scale model and photographic studies. The salient parameters influencing the efficiency of the digging processes are identified and a bucket filling model for cable shovels is proposed.
Naidoo, Kumendrie. "Considerations for stope gully stability in gold and platinum mines in South Africa". Diss., Pretoria : [s.n.], 2001. http://upetd.up.ac.za/thesis/available/etd-11302005-123445/.
Testo completoMadalane, Thembi. "The obligation to rehabilitate mining areas : post mining activities". Thesis, University of Limpopo (Turfloop Campus), 2012. http://hdl.handle.net/10386/905.
Testo completoThe study focuses on rehabilitation, since absence of proper rehabilitation process result in indelible damage to the environment. South Africa, like many other countries, is faced with many environmental problems caused by mining. These problems are particularly caused by, inter alia, abandoned mining areas without rehabilitation, inadequate environmental impact assessment after closure, inadequate financial provision for rehabilitation, and lack of monitoring and aftercare system after post mine closure. The study found that many Companies ignore laws governing prospecting, extraction and rehabilitation. The main purpose of this research is to investigate and recommend guidelines in the rehabilitation process so as to instil respect for the environment. The study therefore recommended strict legislation relating to environmental protection against mining.
Brendliner, Robert Lee. "Toxicity analysis of coal mining industry NPDES discharges in Southwest Virginia /". This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-01122010-020036/.
Testo completoGriffin, Kenneth R. "Design Criteria for Wireless Mesh Communications in Underground Coal Mines". Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/76759.
Testo completoMaster of Science
Abbasy, Farzaan. "An investigation into application of geothermal energy in underground mines". Thesis, McGill University, 2014. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=123077.
Testo completoL'économie d'énergie est une politique importante pour tout pays. L'exploitation des ressources énergétiques durables est devenue plus importante en raison des pénuries et la hausse des prix des combustibles fossiles. L'exploitation minière représente une partie importante du secteur de l'industrie basée-sur-les-ressources au Canada et consomme une énorme quantité d'énergie pour l'opération ainsi que les activités post-extraction minières. Pour cette raison, toute réduction de la consommation d'énergie réduira les coûts et augmentera les profits. Les mines souterraines ont un excellent potentiel pour la mise en œuvre des systèmes d'énergie géothermique en utilisant l'une des deux méthodes suivantes. Dans la première méthode, l'eau dans les mines souterraines qui coule et passe à travers les couches de sol chaudes trouvant son chemin vers les ouvertures, est pompée vers la surface pour être utilisé dans des cycles géothermiques en boucle ouverte. Dans la seconde méthode, des ouvertures et des espaces souterrains qui offrent un accès facile aux formations rocheuses ayant une basse ou moyenne température sont utilisés dans les cycles géothermiques en boucle fermée. Cette recherche se concentre principalement sur la fourniture des directives pour l'utilisation de l'énergie géothermique dans les mines souterraines en comprenant deux parties principales. La première partie, comprend l'enquête de douze mines souterraines à travers le Canada afin d'évaluer le fonctionnement des systèmes géothermiques en boucle ouverte. La deuxième partie examine le potentiel de récupération de chaleur sur des remblais miniers cimentés. À cet effet, les propriétés thermiques de remblai minier cimenté sont étudiées, la signification des paramètres influents est quantifiée et un modèle de prédiction de la conductivité thermique est introduit. En plus, un modèle physique expérimentale est construit pour étudier le transfert de chaleur dans les remblais miniers et d'évaluer les différents arrangements et les paramètres influents. Un modèle analytique est développé sur la base du système de coordonnées cylindriques avec une longueur finie; et le modèle est validé pour le transfert de chaleur dans le remblai. Finalement, une étude de cas d'un chantier remblayé est présentée.
Maritz, Liezl. "Ecological role of mining ponds in Southern Coastal Mines, Namibia". Master's thesis, Faculty of Science, 2021. http://hdl.handle.net/11427/32833.
Testo completoCrellin, David J. "Ground instability associated with mineworkings and groundwater in opencast coal mines". Thesis, University of Nottingham, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375916.
Testo completoNüchter, Andreas, Jan Elseberg e Peter Janotta. "Towards mobile mapping of underground mines". Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2018. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-231186.
Testo completoHudyma, Martin Raymond. "Analysis and interpretation of clusters of seismic events in mines". University of Western Australia. School of Civil and Resource Engineering, 2009. http://theses.library.uwa.edu.au/adt-WU2010.0054.
Testo completoAbolfazlzadeh, Yousef. "APPLICATION OF SEISMIC MONITORING IN CAVING MINES". Thesis, Laurentian University of Sudbury, 2013. https://zone.biblio.laurentian.ca/dspace/handle/10219/2110.
Testo completoNoppé, Mark Adrian. "Geological controls for coal exploration and mining". Thesis, Rhodes University, 1992. http://hdl.handle.net/10962/d1005566.
Testo completoMawdesley, Clare A. "Predicting rock mass cavability in block caving mines /". St. Lucia, Qld, 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16404.pdf.
Testo completoEl-Mherig, A. M. "A study of the stability of jointed rock slopes in surface mines". Thesis, University of Nottingham, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371279.
Testo completoYoung-On, Harold. "An economic evaluation of backfilling in Virginia's coal mines". Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-02132009-172231/.
Testo completoZahiri, Hani. "A predictive GIS methodology for mapping potential mining induced rock falls". Access electronically, 2006. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20060725.120628/index.html.
Testo completoMcCoy, Kurt J. "Estimation of vertical infiltration into deep Pittsburgh coal mines of WV-PA a fluid mass balance approach /". Morgantown, W. Va. : [West Virginia University Libraries], 2002. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=2745.
Testo completoTitle from document title page. Document formatted into pages; contains x, 150 p. : ill. (some col.), maps (some col.). Includes abstract. Includes bibliographical references (p. 87-90).
DeLeon, Sarah Wade Dickinson. "Jewels of Responsibility from Mines to Markets:". ScholarWorks @ UVM, 2008. http://scholarworks.uvm.edu/graddis/65.
Testo completoZhao, Yixian. "Algorithms for optimum design and planning of open-pit mines". Diss., The University of Arizona, 1992. http://hdl.handle.net/10150/185842.
Testo completoHamilton, James F. "A study of the fine gold recovery of selected sluicebox configurations". Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28384.
Testo completoApplied Science, Faculty of
Mining Engineering, Keevil Institute of
Graduate
Hunt, Ortiz Mark A. "Prehistoric mining and metallurgy in south west Iberian peninsula /". Oxford : Archaeopress, 2003. http://catalogue.bnf.fr/ark:/12148/cb39142582n.
Testo completoNüchter, Andreas, Jan Elseberg e Peter Janotta. "Towards mobile mapping of underground mines". TU Bergakademie Freiberg, 2017. https://tubaf.qucosa.de/id/qucosa%3A23181.
Testo completoKoufos, Katarina. "Assessing the potential to implement open loop geothermal systems in Canadian underground mines". Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=107715.
Testo completoDans plusieurs parties du monde, l'installation de pompes à chaleurs géothermiques agissant comme alternatives aux systèmes de chauffage traditionnels et devient une tendance importante. Ce document a l'intention d'examiner cette forme d'énergie renouvelable en utilisant comme source l'eau qui s'écoule des mines souterraines au Canada. Certains exemples de ces types de systèmes, retrouvés principalement en Europe et en Amérique du Nord, seront présentés. Pour les cas mentionnés, plusieurs bâtiments et immeubles utilisent l'énergie géothermique générée par des systèmes d'eau à boucle ouverte installés dans des mines abandonnées. De plus, des études préliminaires ont été acheminées pour douze sites miniers en opération au Canada. Des visites souterraines ont été menées à chaqu'un de ces sites pour recueillir des informations importantes concernant les activités minières, les températures des eaux souterraines et les capacités de pompage. Les capacités thermiques des eaux souterraines ont été calculées et ensuite comparées aux spécifications techniques des pompes à chaleur. Les résultats préliminaires ont été encourageants, incitant donc une enquête pour déterminer le potentiel de cette source d'énergie à l'échelle nationale. Cette évaluation comprend un total de vingt-trois sites miniers. Leur évaluation a constaté que le potentiel de gain de chaleur combiné est de 20,900 kW. Ce gain peut fournir un an de chauffage pour l'équivalent de 69,150 maisons. Les économies annuelles qui peuvent être réalisées en remplaçant un système de réchauffement traditionnel (soit au gaz naturel ou chauffage électrique) par un système géothermique dont la source provient des opérations minières, sera entre $1.5 et $4.9 millions. De plus, l'exploitation de cette forme d'énergie a le potentiel de réduire les émissions de dioxyde de carbone par un facteur de 16,850 à 19,300 tonnes par année.
Squelch, Andrew Peter. "Application of virtual reality for hazard awareness training in South African gold mines". Thesis, University of Nottingham, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243505.
Testo completoMengwe, Moses Seargent. "Towards social impact assessment of copper-nickel mining in Botswana". Thesis, Nelson Mandela Metropolitan University, 2010. http://hdl.handle.net/10948/1443.
Testo completoAsmara, Degi Harja. "Agroforestry on post-mining restoration : a challenge beyond plant mixture systems". Doctoral thesis, Université Laval, 2020. http://hdl.handle.net/20.500.11794/67442.
Testo completoAgroforestry is a dynamic system of ecological management of renewable natural resources, which by integrating woody species into agricultural fields, farms and other landscapes, diversifies and sustains production for increased socio-economic and environmental benefits. As a solution for the provision of ecosystem services, its application to the restoration of degraded damaged, or destroyed ecosystems becomes very important. Degraded, damaged, or destroyed (3-D) lands by mining is characterized by low fertility soil and sometimes high levels of contaminants. These conditions make them difficult to obtain a short-term advantage from agroforestry compared to arable lands, but its main restorative function of restoring ecosystem services and increasing resilience can be beneficial in the long term. The challenge is to develop the best strategy to accelerate plant productivity while improving the soil and the ecosystem through a combination of ecological engineering techniques for bioremediation of mining areas. Here we explore the mixture of plants, microbial inoculation, and biochar amendment, in a woody-herbaceous agroforestry system. The goal is to find the best bioremediation scenario from the combined effects of mixing plants and other related ecological factors. Previous research on agroforestry and restoration has been reviewed worldwide, including the application of the agroforestry concept in bioremediation of post-mining land area. The known restoration strategy in a given environment is not a universal solution. Thus, the identification of any important aspect of previous work on restoration and agroforestry is crucial. The strategy of mixing plants is an important factor in the successional process. But a statistical accounting of plant-plant interactions and adaptation to multi-species conditions is hard to achieve in field experiments; trials under controlled conditions can distinguish effects of planting density and species interactions in the early stages of plant establishment. In this research, we applied the concept of modified Nelder plots for the combination of plant species in a greenhouse experiment on waste rock and fine tailing to explore the interaction at the start of planting. We also applied microbial inoculum and biochar to the plant mixture in greenhouse and field tests on waste rock and fine tailing as soil material on a post-gold mining site. The performance of the co-planting of four woody species: green alder (Alnus viridis (Chaix) DC. ssp. crispa (Aiton) Turrill); white spruce (Picea glauca (Moench) Voss); trembling aspen (Populus tremuloides Michaux); and littletree willow (Salix arbusculoides Andersson) with the herbaceous plant species: oat (Avena sativa L.); red fescue (Festuca rubra L.) and white clover (Trifolium repens L.) was evaluated. Mixing plants is a very important principle in restoration practices, given its known role to increase biodiversity and functional diversity in the sustainable ecological system. Although the plant mixing strategy has been rarely explored, we have found no mixture provided advantages for both species in paired combinations. At the same time, the positive effect of the density on plant growth suggested that the microclimate improvement had played a role in the early growth of the plantations. The field trial confirms the positive effect of the microclimate modification on plant productivity in higher planting density. The trade-off on plant competition has shown, however, that the highest density does not necessarily show an optimal condition for plant productivity. The interaction effect of biochar and inoculation treatment shows the benefit of this treatment, although the impact varies according to the density of planting. The plantation density was shown as the most important factor in generating the net positive effect. We suggest that the mechanism was correlated with the microclimate improvement through soil plant water conservation and microbial activity enhancement over soil temperature modification. Hence, putting emphasis on microclimate improvement, along with other combined factors including microbial inoculation and biochar amendment is very important for accelerating the restoration processes
Erkayaoğlu, Mustafa. "A Data Driven Mine-To-Mill Framework For Modern Mines". Diss., The University of Arizona, 2015. http://hdl.handle.net/10150/579114.
Testo completoFaust, Robert Edward. "Lead belt progressives : the struggle for social and environmental reform in Missouri mining communities /". free to MU campus, to others for purchase, 2003. http://wwwlib.umi.com/cr/mo/fullcit?p3115543.
Testo completoMaran, Juliano. "Study of truck allocation and truck dispatching problems in open pit mines". Thesis, Virginia Tech, 1987. http://hdl.handle.net/10919/45807.
Testo completoIn 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
Lopes, Luís, Norbert Zajzon, Balázs Bodo, Edine Bakker e Gorázd Žibret. "UNEXMIN H2020 project: an autonomous underwater explorer for flooded mines". Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2018. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-231106.
Testo completoPrakash, Bisleshana Brahma. "Design of Stable Slope for Opencast Mines". Thesis, 2009. http://ethesis.nitrkl.ac.in/1333/1/10505020.PDF.
Testo completoBadal, K. Kujur. "Blast Vibration Studies in Surface Mines". Thesis, 2010. http://ethesis.nitrkl.ac.in/1788/1/THESIS-BADAL_KUMAR_KUJUR-10605005BLAST_VIBRATION_STUDIES_IN_SURFACE_MINES.pdf.
Testo completoVora, J. "Dust Dispersion Modeling For Opencast Mines". Thesis, 2010. http://ethesis.nitrkl.ac.in/1760/1/jinesh.pdf.
Testo completoChoudhary, S. S. K., e Ravi Ranjan. "Blast vibration monitoring in opencast mines". Thesis, 2014. http://ethesis.nitrkl.ac.in/5680/1/110MN0389-11.pdf.
Testo completoMarndi, Bhagaban. "Stability of Slopes in Iron Ore Mines". Thesis, 2011. http://ethesis.nitrkl.ac.in/2608/1/107MN018.pdf.
Testo completoRout, Manmit, e Chinmay Kumar Parida. "Optimization of blasting parameters in opencast mines". Thesis, 2007. http://ethesis.nitrkl.ac.in/4287/1/Optimization_of_Blasting_Parameters_in_Opencast_Mines_06.pdf.
Testo completoSahoo, Abhijit. "Suitability Study of Surface Miner in Indian Coal Mines". Thesis, 2013. http://ethesis.nitrkl.ac.in/5120/1/109MN0126.pdf.
Testo completoNag, Soumyakant. "Evaluation of dragline mining in Indian coal mines". Thesis, 2013. http://ethesis.nitrkl.ac.in/4931/1/109MN0500.pdf.
Testo completoPrasad, B. N. V. Siva. "Study of Strata Behaviour in Blasting Gallery Panel in Coal Mines". Thesis, 2013. http://ethesis.nitrkl.ac.in/5142/1/109MN0505.pdf.
Testo completo