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Dissertations / Theses on the topic 'Coal mine waste'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 August 2024

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1

Qureshi, Asif. "Potential of fly ashes for neutralisation of acid mine drainage from coal mine waste rock." Licentiate thesis, Luleå tekniska universitet, Geovetenskap och miljöteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-17607.

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Many countries around the world use coal as fuel for the purpose of power generation. The extraction of coal produces large volumes of waste rock (WR) that are sometimes sulphide rich (principally containing iron sulphides such as pyrite (FeS2) and pyrrhotite (Fe1-xS)), with varying quantities of trace elements such as As, Si, Cu, Zn, Ni, Co, Mo and Cr etc). Such waste is environmentally sensitive due to the risk of oxidation in presence of atmospheric oxygen and water. Sulphide oxidation may result in acidic waters (acid mine drainage, AMD), which often contains high loads of dissolved metals

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2

Barkhordarian, A. "Laboratory studies of pumping characteristics of processed liquid tailings with particular reference to stability and time dependant properties." Thesis, University of Nottingham, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384642.

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3

Gosling, Christine. "Co-disposal of rejects from coal and sand mining operations in the Blue Mountains : a feasibility study /." View thesis, 1999. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030822.133548/index.html.

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4

Walker, Thomas Alexander Bruce. "The use of organic amendments in the reclamation of acidic coal mine waste." Thesis, University of Glasgow, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293389.

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5

Sekhohola, Lerato M. "Evaluation of Fungcoal as a bioprocess technology for self-cladding of waste coal dumps." Thesis, Rhodes University, 2016. http://hdl.handle.net/10962/d1019992.

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Low-grade coal, a poor source of energy, has long been regarded as waste material by the coal mining industry. Biological degradation of this coal material by ligninolytic fungal strains presents a viable strategy towards eliminating this unusable fossil fuel. To this end, a novel and patented bioprocess termed Fungcoal was developed. Fungcoal is a biological process utilised in the in situ treatment of waste coal and is based on the mutualistic relationship between the fungus Neosartorya fischeri and the graminaceous species Cynodon dactylon. The process facilitates the rapid conversion of wa

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6

Albuquerque, Allwyn J. J. "Geoenvironmental aspects of coal refuse-fly ash blends /." This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-12042009-020142/.

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7

Gosling, Christine, University of Western Sydney, and School of Civic Engineering and Environment. "Co-disposal of rejects from coal and sand mining operations in the Blue Mountains : a feasibility study." THESIS_XXXX_CEE_Gosling_C.xml, 1999. http://handle.uws.edu.au:8081/1959.7/824.

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This thesis presents details of investigations into the potential for co-disposal of the two rejects from Clarence Colliery and Kable's Transport Sand Mine. Column experiments were undertaken to simulate field conditions. The experiment consisted of: 1/. creating the required co-disposal arrangement and structure in containers 2/. infiltrating water through each container and measuring the rates of infiltration and overflow 3/. measuring the chemical properties of the leachate water. Geotechnical tests of co-disposal pile stability were undertaken using a specially constructed shear box. Resul

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8

Wolcott, Lisa Terwilliger. "Coal waste deposition and the distribution of freshwater mussels in the Powell River, Virginia." Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-03032009-040400/.

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9

Burkey, Michael F. "A REVIEW OF IRON SULFIDES AND OXIDES IN COAL MINE WASTE, HUFF RUN WATERSHED, OHIO." Kent State University Honors College / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ksuhonors1525905282950671.

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10

Zhang, Sheng. "Source term modelling of contaminant formation processes generated by coal mine waste in column tests." Thesis, University of Sheffield, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499986.

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11

Hunt, Joseph Edward. "Evaluation of Leachate Chemistry from Coal Refuse Blended and Layered with Fly Ash." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/36050.

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Alkaline fly ash has been studied as a liming agent within coal refuse fills to reclaim acid-forming refuse. Previous studies focused on bulk blending ash with acid-forming (pyritic) refuse. A better representation of field conditions is a â pancake layerâ of ash above the refuse. A column study was initiated to evaluate the leachate chemistry from acid-forming refuse-ash bulk blends vs. ash over refuse layers. An acidic and an alkaline ash were blended with, or layered over, acid-forming refuse and sandstone and packed into columns which were leached with deionized water twice a week fo

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12

Gosling, Christine. "Co-disposal of rejects from coal and sand mining operations in the Blue Mountains : a feasibility study." Thesis, View thesis, 1999. http://handle.uws.edu.au:8081/1959.7/824.

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This thesis presents details of investigations into the potential for co-disposal of the two rejects from Clarence Colliery and Kable's Transport Sand Mine. Column experiments were undertaken to simulate field conditions. The experiment consisted of: 1/. creating the required co-disposal arrangement and structure in containers 2/. infiltrating water through each container and measuring the rates of infiltration and overflow 3/. measuring the chemical properties of the leachate water. Geotechnical tests of co-disposal pile stability were undertaken using a specially constructed shear box. Resul

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13

Rehn, Andreas. "Mineralogical and Geochemical Study of Acid Mine Drainage from 100 Years of Coal Mining in Svalbard (78° N)." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-78714.

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Waste rock piles from coal mining of tertiary bituminous coal in Longyearbyen, Svalbard, show sulfide oxidation and subsequent acid mine drainage (AMD) production. The aim was to establish deeper understanding of AMD prediction based on Mineralogy and Geochemistry of coal and AMD samples. Mineralogical investigation of both coal and rock samples was performed with Automated SEM (ZEISS-Sigma VP300-Mineralogic System) as well as RAMAN. ICP-MS analysis was performed on solid and water samples. The pH from in situ measurements of AMD between 2,5-7,0. Eh varied from 222-569 mV (corresponding pe val

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14

Ahmad, Shakeel [Verfasser]. "A contribution to open pit hard coal mine waste rock management : comparing sidehill fill with layered dumping / Shakeel Ahmad." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2013. http://d-nb.info/1046646192/34.

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15

Cleghorn, Charles 1970. "Effect of soil covers on coal waste dumps in KwaZulu-Natal on abiotic factors and bacteria causing acid mine drainage." Thesis, Stellenbosch : Stellenbosch University, 1997. http://hdl.handle.net/10019.1/55521.

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Thesis (MSc)--Stellenbosch University, 1997.<br>ENGLISH ABSTRACT: The activity of iron-oxidizing bacteria, for example, Thiobacillut. ferrooxidans, in the outer layers of coal waste dumps results in the oxidation of pyrite with the formation of large volumes of acid mine drainage. The process requires atmospheric oxygen and moisture. Acid mine drainage may possibly be controlled by creating unfavourable environmental conditions in dumps for the iron-oxidizing bacteria. The present research investigated the possibility of inhibiting these bacteria and consequently acid formation in coal w

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16

Albuquerque, Allwyn J. "Geoenvironmental aspects of coal refuse-fly ash blends." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/46095.

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<p>The separate land disposal of coal refuse and fly ash presents difficulties throughout the Appalachian region, both in terms of disposal costs per acre and in terms of its potential environmental impacts on soil, ground water, revegetation, and slope stability. The purpose of this study was to determine how fly ash addition to coal refuse would impact on certain geotechnical properties of the refuse disposal piles, and whether the refuse-fly ash blends would be suitable as co-disposed materials. Accordingly, the compaction, permeability and shear strength characteristics of the refuse-fly a

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17

Modinger, Heinrich. "Micro-organisms involved in iron oxidation and acid mine drainage formation in KwaZulu-Natal and their control by soil covers on coal waste dumps." Thesis, Stellenbosch : Stellenbosch University, 1998. http://hdl.handle.net/10019.1/55926.

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Thesis (MSc)--Stellenbosch University, 1998.<br>One copy microfiche.<br>ENGLISH ABSTRACT: The biologically catalysed oxidation of pyrite in the outer layers of coal waste dumps leads to the formation of acid mine drainage. The oxidation of pyrite to ferric iron and sulphate is a complex process involving various abiotic and biologically catalysed reactions. Pyrite is abiotically oxidized by ferric iron, with the formation of thiosulphate and ferrous iron. Thiosulphate decomposes to form various inorganic sulphur compounds. Bacterial catalysis of pyrite oxidation is achieved by iron-oxidi

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18

Nada, Wael Mohamed Abdel-Rahman. "Wood compost process engineering, properties and its impact on extreme soil characteristics." Phd thesis, Universität Potsdam, 2011. http://opus.kobv.de/ubp/volltexte/2011/5104/.

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The landfilling of biodegradable waste is proven to contribute to environmental degradation. Much wood and lumber is discharged as waste from the cleared fields. These woody wastes are subsequently disposed of by burning. However, it would be preferable to dispose of them without combustion to avoid the release of carbon dioxide, one of the critical greenhouse gases. Instead of burning these woody wastes, we should recycle them as future resources. One solution to this problem is to make compost from the waste. Compost use in agriculture is increasing as both an alternative to landfilling for

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19

Machado, Luciana Angelita. "Controle da geração da drenagem ácida da mineração de carvão pelo método de aditivos alcalinos com escória de aciaria elétrica." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/96385.

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A disposição de rejeitos com potencial de geração de acidez e consequente geração de drenagem ácida de mina (DAM) é um dos grandes problemas ambientais enfrentados pela indústria da mineração de carvão, pois a disposição inadequada contamina a água e o solo. A DAM é uma solução aquosa caracterizada por possuir pH geralmente abaixo de 3 e diversos metais dissolvidos. Devido a essas características, a DAM representa grandes riscos ambientais, em especial, aos recursos hídricos, em consequência da solubilização e mobilização de metais pesados. Este problema requer estudos no sentido de encontrar

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20

Kotelo, Lerato Olga. "Characterising the acid mine drainage potential of fine coal wastes." Master's thesis, University of Cape Town, 2013. http://hdl.handle.net/11427/12574.

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Includes bibliographical references.<br>Acid mine drainage (AMD) is one of the major environmental challenges facing the South African mining sector. Acid mine drainage has received significant public attention in recent years. South Africa's long mining history has led to a growing concern that coal-related AMD from these mines (both operational and defunct) will continue for centuries to come. Pyrite bearing fine waste, generated during coal preparation and beneficiation, is thought to carry a significant amount of AMD pollution risk. Coal-related AMD generation has not been afforded the sam

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21

Basu, Kohinoor. "Feasibility of an Integrated Thin Seam Coal Mining and Waste Disposal System." Thesis, Virginia Tech, 1997. http://hdl.handle.net/10919/9578.

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The depletion of more attractive thicker and easily accessible coal seams in the central Appalachia will direct attention towards the extraction of coal seams thinner than 28 in. This thesis investigates the feasibility of an integrated mining and backfilling system applicable to thin seams. Two conceptual mining systems, namely Auger mining and Self Advancing Miner, have been proposed for this purpose. Both these systems are designed to remotely mine coal from the seams. Several attempts were made in the past to mine coal in a similar fashion but were not very successful due to several proble

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22

Grimes, Janet A. "Economic and system feasibility study of municipal waste stowage in underground coal mines." Thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-05092009-040521/.

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23

Stewart, Barry Robert. "Physical and chemical properties of coarse coal refuse from Southwest Virginia." Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-03142009-040755/.

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24

Strobel, Philip Scott. "Inhibition of iron-oxidizing bacteria in wastes from coal and hard-rock mines using the anti-bacterial agent." Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/42234.

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The production of acid mine drainage (AMD) is catalyzed by iron-oxidizing bacteria primarily of the species Thiobacillus ferrooxidans. By inhibiting these bacteria, the production of AMD can be greatly reduced. One compound found to be effective in the inhibition of T. ferrooxidans is nitrapyrine. N-Serve, a product of Dow Chemical, Inc., is the commercially available form of nitrapyrine. This compound has been widely used in agriculture for nitrification inhibition. The purpose of this study was to determine the effectiveness of N-Serve in reducing the production of AMD under simulated field

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25

Stewart, Barry R. "Physical and chemical properties of coarse coal refuse from Southwest Virginia." Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/41626.

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Coarse coal refuse is difficult to reclaim due to high potential acidity and coarse fragment content, low water holding capacity, low fertility, and other problems. Little is known about coal refuse properties, particularly as they relate to revegetation potential. This study was undertaken to determine the physical and chemical properties of composite samples from 27 coal waste piles of varying age. Selected physical and chemical properties varied widely across this sample set. The mean coarse fragment (>2mm) content of these materials was 60%. The average texture of the fine (<2mm) fraction

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26

Ngo, Thanh Binh, and Thanh Hai Nguyen. "Design of a system for management and monitoring of vehicles transporting solid waste in open-cast coal mines." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-99567.

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Today, solid waste management in coal mines is an urgent requirement for the coal mining industry. The overlying materials removed from a seam of coal are solid wastes transported to dumping sites and should be strictly, efficiently managed and monitored by an automatic system. These wastes must be separated for use as leveling and filling materials or residue materials need to be processed in order to minimize the impact on the environment. The system was designed to manage and monitor vehicles transporting solid waste in open coal mines to force them in tasks of taking solid wastes and givin

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27

SHUQAIR, SHUQAIR M. S. "Estudo da contaminacao do solo e agua subterranea por elementos toxicos originados dos rejeitos das minas de carvao de Figueira no Estado do Parana." reponame:Repositório Institucional do IPEN, 2002. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11039.

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Made available in DSpace on 2014-10-09T12:47:19Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:10:26Z (GMT). No. of bitstreams: 1 08354.pdf: 6557210 bytes, checksum: 0c6cea793150b2683fda13b9ec421168 (MD5)<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

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28

Босак, Павло Володимирович. "Екологічна безпека стічних вод породних відвалів вугільних шахт Нововолинського гірничопромислового району". Diss., Національний університет "Львівська політехніка", 2021. https://ena.lpnu.ua/handle/ntb/56737.

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Дисертаційна робота присвячена дослідженням підтериконових стічних вод із породних відвалів вугільних шахт Нововолинського гірничопромислового району, аналізу системи заходів з метою підвищення екологічної безпеки гірничопромислового комплексу на довкілля. Встановлення рівнів екологічної небезпеки стічної води із відвалів вугільних шахт, дослідження сезонної динаміки вмісту важких металів стічної води з териконів, проектування та розрахунок біоплато дозволяють запровадити новітні форми очищення стічних вод із відвалів вугільних шахт та сприяють підвищенню екологічної безпеки регіону. У резуль

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29

Stewart, Warwick. "Development of acid rock drainage prediction methodologies for coal mine wastes." 2005. http://arrow.unisa.edu.au:8081/1959.8/24976.

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Acid rock drainage (ARD) is recognised as one of the most serious environmental issues currently facing the mining industry. ARD management strategies rely heavily on the ability to measure the ARD potential of waste materials to ensure strategies are appropriate to the ARD risks. It is apparent that improvements to the understanding of ARD test methods and development of methods to better represent the ARD potential of samples will contribute significantly to the value and reliability of ARD assessment. The research described in this thesis focused on critical assessment and improvement of: A

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30

Newton, Peter Eric. "The deployment of thermosyphons to extract heat from burning coal mine waste." Thesis, 2019. http://hdl.handle.net/1959.13/1404496.

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Research Doctorate - Doctor of Philosophy (PhD)<br>After drilling to establish the hottest part of a coal mine spoil pile, two stainless steel thermosyphons were installed to assess their ability to cool the hot ground. One device was a single-phase coaxial thermosyphon (water down through the outer annulus) with forced circulation, and the other was a two-phase (liquid plus vapour) device that relied on thermal buoyancy. The heated mine spoil into which the devices were installed was found to have experienced combustion that had since ceased, leaving a localised hotspot. Natural ground coolin

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31

Knysh, Ivan, and Vasyl Karabyn. "Associations of microelements in the rocks of waste pile of mine “Mezhirichanska”." Thesis, 2008. http://hdl.handle.net/123456789/3070.

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32

Green, Benjamin S. "Ecological responses to the discharge of polluted coal mine wastewater." Thesis, 2019. http://hdl.handle.net/1959.7/uws:58295.

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The discharge of coal mine generated wastewater has degraded the Georges River downstream of the discharge point. This study measured the water quality, sediment quality and macroinvertebrate community of the upper Georges River to determine the impact of the influx of wastewater from an underground coal mine. The investigation revealed that the wastewater discharge from the West Cliff Colliery into the Georges River was highly polluted. The pollution of the river is characterised by increases in electrical conductivity, pH levels and a suite of metals including antimony, aluminium, arsenic, b

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"An investigation of the hydrodynamics of the teetered bed separator for fine coal recovery." Thesis, 2005. http://hdl.handle.net/10413/2726.

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The South African coal industry produces a large quantity of coal per annum. The rejects from various unit operations, such as spirals, consist of fine coal that joins the plants tailings dam waste. As existing high quality resources become depleted, the need to improve recovery of this fine coal grows. This project investigates the use of a teetered bed separator (TBS); a hindered settling gravity concentration device for fine coal recovery. This device has proven successful in the United Kingdom and in Australian collieries for fine coal separation in the size range between 2mm and 0.3mm. It

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34

Qureshi, Asif. "Co-disposal of waste rock and lignite fly ash to mitigate the environmental impact of coal mining." Doctoral thesis, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-60261.

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Waste rocks (WRs) from coal mining and fly ash (FA) from coal combustion were studied to determine the potential of the WRs to generate AMD, FAs to neutralise it and estimate their impacts on environment. The ultimate goal was to develop a methodology based on co-disposal to mitigate the environmental problems associated to both wastes. Two methods for co-disposal were tested: i) Mixing WRs and FAs and ii) covering WRs with FAs. WRs were sampled from the Lakhra coal mines in Pakistan (PK), which has an estimated coal reserves of 1.3 Btonne, varying from lignite to sub-bituminous quality. The F

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"CHARACTERIZING A GROUNDWATER SYSTEM DOWNGRADIENT OF A COAL MINE WASTE ROCK DUMP, ELK VALLEY, BRITISH COLUMBIA, CANADA." Thesis, 2015. http://hdl.handle.net/10388/ETD-2015-09-2240.

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Seepage from steelmaking coal mine waste rock dumps in the Elk Valley, British Columbia, Canada can contain selenium (Se), cadmium (Cd), and sulfate (SO42-) from the oxidation of sulfide minerals, and nitrate (NO3-) from blasting. The impact of these constituents of interest (CIs) on receiving groundwater systems and the potential for their natural attenuation is investigated. A 10.7 km2 mine-impacted research catchment (West Line Creek) was instrumented with 13 monitoring wells and 8 drivepoint wells to characterize the hydraulics and geochemistry of the aquifer system downgradient of the was

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Fleming, Callum. "Investigating the effectiveness of environmental regulation to protect waterways receiving coal mine wastewater." Thesis, 2021. http://hdl.handle.net/1959.7/uws:68141.

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Environmental regulation and licencing of coal mine wastewater discharges are often ineffective at achieving the core objective of protecting environments from negative impacts such as water pollution. Coal mining and the discharge of mine wastewater to river systems is a widespread source of water pollution across the world, often introducing ecologically hazardous levels of salinity and contaminants such as the heavy metals nickel and zinc. Many discharges of mine wastewater to the environment are not appropriately regulated, often resulting in the degradation of water quality and aquatic ma

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Mukatuni, Sedzani. "Geology and characterization of coal at the Mushithe Coal Occurrence, Soutpansberg Coalfield, Limpopo Province, South Africa." Diss., 2019. http://hdl.handle.net/11602/1456.

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MESMEG<br>Department of Mining and Environmental Geology<br>The Mushithe coal occurrence is situated approximately 16 km west of the Tshikondeni coal mine in the Tshipise-Pafuri sub-basin of the Soutpansberg coalfield in South Africa. The Soutpansberg Coalfield has received comparatively less attention compared to other more notable South African coalfields. There is as a consequence very limited information in the public domain applicable to the geology as well as quality of coal in this coalfield, as a result there is no known study focused exclusively on the Mushithe coal occurrence. The a

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Belmer, Nakia. "Assessment, regulation and management of water pollution from underground coal mines in the Sydney Basin." Thesis, 2022. http://hdl.handle.net/1959.7/uws:68539.

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This research surveys water quality and chemistry, river sediment chemistry and aquatic macroinvertebrates in eight streams that are the recipient of coal mine wastewaters from seven collieries across the Sydney Basin. The study also surveyed water quality and chemistry at five of the seven collieries wastewater discharge streams (effluent streams). Most of the coal mine wastewater discharges are licensed and regulated by the New South Wales Environment Protection Authority (NSW EPA) through a series of Environmental Protection Licences (EPL’s). During this study four of the collieries were ac

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39

Webb, Christy Mary Winifred. "The use of various soil ameliorants and indigenous grasses, in the rehabilitation of soil from open cast coal mines in Mpumalanga, South Africa." Thesis, 2004. http://hdl.handle.net/10413/5574.

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A series of pot trials were undertaken to test the growth of indigenous grasses (Themeda triandra and Cynodon dactylon) on mine capping soil, treated with various soil ameliorants. The capping soils were obtained from open cast coal mines (Optimum Mine and Syferfontein Mine) in the Mpumalanga Highveld, south of Witbank. However, because mine soil was not available at the commencement of the project, the initial pot trial used soil from the Umlazi Landfill in Durban. The trials were the Umlazi Landfill Trial, Microbe Trial, Legume Trial and Fly Ash Trial. For the Umlazi Landfill Trial, landfill

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Grove, Francois Michael. "The beneficiation of carbonate rich coal seam water through the cultivation of Arthrospira Maxima (Spirulina)." Diss., 2013. http://hdl.handle.net/10500/14665.

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Coal seams are commonly associated with poor quality water that requires treatment. Water treatment can be very expensive and can severely affect the profitability of mining projects. This study investigated the potential cultivation of Arthrospira maxima (Spirulina) in coal seam water to beneficiate coal seam water in order to effectively offset the water treatment cost. The study was conducted in Northern South Africa and formed part of a larger Coal Seam Water Beneficiation Project (CSWBP). The study consisted of laboratory based Flask Studies and outdoor High Rate Algal Pond Studies. The

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Moyo, Stanley. "The quality of water entering Loskop Dam, Mpumalanga, South Africa." 2013. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1000747.

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D. Tech. Chemistry<br>The increase in industrialisation in South Africa has led to an increase in coal mining and coal utilisation in Mpumalanga. This has resulted in the deterioration in the quality of water upstream of Loskop Dam. Little or no information is available on the occurrence or fractionation of trace metals in sediments, which are reservoirs for pollutants. Furthermore, no information is available concerning the occurrence of polycyclic aromatic hydrocarbons (PAHs), known for their carcinogenic and mutagenic effects, in rivers in the area. The possible impact of leaching of elemen

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Van, Rooyen Kenneth Carl. "An integrated method of coal discard and slurry disposal to reduce the environmental impact from coal residue." Thesis, 2014. http://hdl.handle.net/10210/9126.

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M.Sc. (Geography)<br>Coal mined in South Africa for the competitive international market, has to be selected to meet the many quality specifications of customers. This upgrading is done by washing the coal in a heavy medium separation plant. Marketable coal, discard and slurry are produced from this washing. Discard consists mainly of poor quality coal, carbonaceous shale and waste rock. Iron pyrite (FeS2) occurs in all of the above in higher concentrations than in the marketable coal. Both the carbonaceous materials and pyrites generate heat when oxidizing. If this oxidation is not arrested a

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Kaitano, Rufaro. "Modelling of low temperature oxidation of coal dumps." Thesis, 1998. https://hdl.handle.net/10539/25853.

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A dissertation submitted to the Faculty of Engineering, University of the Witwatersrand, Johannesburg, for the Degree of Master of Science.<br>storage and waste dumps from coal mining tend to spontaneously combust. This is mainly as a result of the oxidation process which is accelerated by the availability of oxygen and the exothermic nature of the oxidation process. In cases of poor ventilation the heat accumulation within the bed is thought to lead to the spontaneous combustion of coal. The work in this dissertation aims to investigate the change in oxygen concentration in a bed of

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England, Trevor. "The development of binderless, smokeless briquettes from bituminous colliery waste." Thesis, 1993. http://hdl.handle.net/10539/22763.

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A project report submitted to the Faculty of Engineering, University of the Witwatersrand, Johannesburg in partial fulfilment of the requirements for the degree of Master of Science in Engineering Johannesburg, 1993<br>Superfines of less than 200 micron are generated when mining coal. They have not been successfully beneficiated in the past and are not acceptable to the consumer. A processh as been developed whereby the superfines are beneficiated, briquetted without the use of binders and devolatilised to produce a premium smokeless briquette which will attract a premium price in the exp

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Koosmen, Kai. "Considerations for the geotechnical stability of coal mine spoil piles containing co-disposed tailings." Thesis, 2017. http://hdl.handle.net/1959.13/1342498.

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Research Doctorate - Doctor of Philosophy (PhD)<br>Billions of tons of mineral wastes are generated annually by the Australian open-cut coal-mining industry. These wastes include the waste rock which is excavated in order to access the underlying coal seams, and the impurities which are removed when processing the unrefined raw coal. These processing wastes include a gravel-dominated coarse reject stream and a slurry-like tailings reject stream. Typically, the rock waste is disposed of in massive fill structures commonly termed waste dumps or spoil piles, which may be hundreds of meters in hei

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Das, Prithika. "Development and Characterization of Composites filled with Coal Mine Overburden Material and other Industrial Wastes." Thesis, 2018. http://ethesis.nitrkl.ac.in/9779/1/2018_MR_PDas_615MN3001_Development.pdf.

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Industrialisation involves large scale use of natural resources- coal, iron, bauxite, etc. The current technology though highly advanced, yet have limited scope to use all the earth resources. Thus, it often produces huge amount of waste- undesirable by-products of those earth materials. Those by-products many a times adversely affect the environment as well as sustainable development. Coal mine overburden, fly ash and red mud are some of those prominent by-products. There exist many attempts to enhance the usage of those, often in developing new composite products. Although a lot of work exis

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Wong, Hugh, and 黃松光. "Surveying Study of Applying Revegetation Methods to Recover in Wasted Coal Maine Field-- Tian-Yi Coal Mine Field in Miaoli as an Example." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/06236446908391659792.

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碩士<br>國立中興大學<br>水土保持學系<br>93<br>In the initial period of Taiwan’s restoration, the coal was an important energy resource in Taiwan. There were many abandoned collieries in all parts of Taiwan. Majority of abandoned coal refuse banks had not been restored with proper treatment exploitation. The mining sites belong to acid sulfate soils zone. It is difficult to carry out revegetation. Only M.floridulus could be invade and grow at these sites. The erosion of the bared grounds was sources of all sorts of problems for landscape, environmental, ecological, soil and water conservation. This paper is

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Straker, Justin, Roger Joseph Berdusco, Carol Elizabeth 1953 Jones, Ron Jones, and Sara Harrison. "Elk Valley coal waste as a growth medium : results of soil and vegetation analysis from Elk Valley Coal's Fording River, Greenhills and Line Creek mines." 2005. http://hdl.handle.net/2429/8717.

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The Fording River, Greenhills and Line Creek Operations are three surface coal mines located adjacent to each other in the Fording and Elk River valleys of southeastern British Columbia. These mines are operated by Elk Valley Coal Corporation, and produce high-quality metallurgical coal. Active programs of reclamation research have been conducted on all three properties. One of the primary objectives of this research has been to evaluate the feasibility of reclamation directly on coal waste, as opposed to reclamation utilizing an overlying capping material. This paper reports on the results, b

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