Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"Abandoned mines"”.
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Microclimate modeling of bat habitat in abandoned mines
Includes bibliographical references (page 61).
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Remediation of Abandoned Mines Using Coal Combustion By-products
… that occurs when pyrite that is present in abandoned coal mines comes in contact with oxygen and water, forming acidic water rich in dissolved metals. Grout injection into mines is a popular technique that provides a permanent solution to control AMD. The main objective of this study was to …
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Analysis and Application of Coal Seam Seismic Waves for detection of Abandoned Mines
… coal mining to be conducted in the proximity of abandoned underground mines that are prone to accumulate water, methane or other toxic gases, and are often either poorly mapped or without good surface survey control. Mining into such abandoned voids poses a great safety risk to personnel, …
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Development of an integrated approach for prioritization of mine features of selected abandoned mines for rehabilitation in the Giyani Greenstone Belt
… in which mining companies operate. However, many mines have been abandoned and/or improperly closed which has lasting impacts on public health and safety and the environment. South Africa has more than 5906 abandoned mine sites that were left unrehabilitated. Although the problems of abandoned …
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Development of a computer-based advisory system for a selection of appropriate rehabilitation strategies for designated abandoned mine sites in Limpopo Province of South Africa
South Africa has many abandoned mines which seriously affect the environment and the livelihood of the host communities. The lack of in-depth knowledge of the problems of these mines, limited resources for their rehabilitation, lack of clearly assigned responsibilities for rehabilitation, and the …
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Evaluation of strategies for rehabilitation of selected abandoned/historic mine sites in the Giyani Greenstone Belt, Limpopo Province of South Africa
… has left the country with a negative legacy of abandoned mines that present environmental problems, and public health and safety concerns. The common physical and environmental problems of most of these abandoned mines are associated with open shafts, unstable slopes of waste dumps and pits, and …
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The Toxic Legacy of the Gold Rush
… harmful to human health. Today, there are 47,000 abandoned mines littered across California, many of which are gold mines concentrated in the appropriately named Gold Country region of the western Sierra Nevada mountains. Most of these sites were abandoned before federal and state laws required …
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A comparative legal approach to mining rehabilitation funding schemes in South Africa and Western Australia
… and social challenges posed by historically abandoned mine sites to host communities, little effort has been made by the mining industry and governments to rehabilitate the environment. Mine rehabilitation projects are typically costly. In many instances, mining companies do not have a …
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Assessment of soil erosion hazard around the abandoned mine in formerly Mutale Municipality, Limpopo Province, South Africa
… from the beginning. The decommissioning of abandoned mines before the environment legislation, The National Environmental Management Act 107 of 1998 and the Minerals and Petroleum Resources Development Act 23 of 2002, was introduced is of great concern as the abandonment of mines without …
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The influence of mine waste contamination on invertebrates and fish in the Methow River Valley, Okanogan County, Washington (U.S.A.)
… copper and zinc until the early 1950's, but the mines are now inactive. The trace elements arsenic (As), cadmium (Cd), copper (Cu), lead (Pb), and zinc (Zn) were the focus of this study.The objectives of this study were to determine, (1) the concentrations of Cu, As and other trace elements in …
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Applications and Development of Intelligent UAVs for the Resource Industries
… the usage of drones has expanded to underground mines, with advancements in drone autonomy in GPS-denied environments. Developments in lidar technology and Simultaneous Localization and Mapping (SLAM) algorithms are enabling UAVs to function safely underground where they can be used to map …
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The prediction of surface subsidence due to room and pillar mining in the Appalachian coalfield
… higher secondary extractions in room-and-pillar mines and the severe subsidence occurrences over certain abandoned mines have placed added emphasis into the subsidence phenomenon above such panels. In this research, a comprehensive subsidence data bank for cases of partial extraction was compiled …
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South Africa's Stolen Gold: a legal analysis of the impact of illegal mining on South Africas national security
… and spread of these activities, from primarily abandoned mines to operational mines. Hence, any real plan to combat illegal mining activities successfully needs a coordinated approach that involves all stakeholders within the mining industry and the security sector, focusing on the key drivers …
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Mapping with mobile robots
… autonomously <br>explore and acquire 3D maps of abandoned mines is a 1,500 pound <br>vehicle, nicknamed "Groundhog". The core of the Groundhog navigation <br>system is comprised of a software package that solves the SLAM problem <br>by acquiring 2D maps. Our research demonstrates that the …
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Effect of a heavy metal on ecto- and vesicular-arbuscular mycorrhizal fungi: the physiology, ultrastructure, and ecology of copper stress and tolerance
… and a brief conclusion. The first chapter examines the enzyme tyrosinase in several ectomycorrhizal fungi and shows that its activity is altered in these fungi in response to copper. Polyamines are also examined in this chapter, and it is shown that their levels are altered in some …
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Assessment of water pollution arising from copper mining in Zambia: a case study of Munkulungwe stream in Ndola, Copperbelt province
… pollution is a major problem on copper and coal mines throughout the world and Zambia, the focus of this study, is no exception. Worldwide freshwater resources, which provide important ecosystem services to humans, are under threat from rapid population growth, urbanization, industrialization and …
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The Measurement of Decomposition Products of Select Gases as an Indicator of a Concealed Mine Fire
… are not definitive. Inaccessible areas of coal mines include: 1. A mined-out area, such as a long-wall gob. 2. A mine area, or entire mine, that has been sealed to extinguish a fire. 3. The interior of pillars in a mine. 4. Abandoned mines. Mined-out areas — gobs — are particularly problematic. …
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Impacts of anthropogenic activities on the fisheries of the Don, Rother and Dearne catchments
… diverse discharges from sewage, industry and abandoned mines. This is exacerbated by various pollution incidents, the causes of some of which remain unidentified.The River Rother has low fish population densities, and many stretches of the river are fishless due mainly to poor water quality …
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Development of co-disposal methods for coal discards and fine waste for the prevention of acid mine drainage
… minerals present in wastes from both active and abandoned mines is often treated with alkaline materials and is further processed to remove metals. Indefinite maintenance and operational activities emanate from these treatment processes. Further, accumulating sludge from processing streams …
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Crop response to irrigation with acidic and neutralized, saline mine water
… mining activities and concurrent abandonment of mines in many South African mining areas has left the state with the responsibility of caring for and rehabilitating ownerless mines, which are prone to flooding and discharge acid mine drainage (AMD) to surrounding environments. In the …