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Дисертації з теми "Coal dump"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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1

Eze, Chuks Paul. "Chemical, physical and morphological changes in weathered coal fly ash : a case study of brine impacted wet ash dump." University of the Western Cape, 2011. http://hdl.handle.net/11394/5420.

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>Magister Scientiae - MSc<br>Fly ash is the major waste material produced by power plants in the combustion of coal to generate electricity. The main constituents of fly ash are Si, Al, Fe and Ca with smaller amount of S, Mn, Na, K, and traces of many other elements such as Co, Cd, As, Se, Zn, Mo, Pb, B, Cu and Ni. Fly ash is usually disposed either by dry or wet disposal methods. These disposal methods have raised major environmental concerns due to the potential leaching of chemical species from the ash heap by ingress of rainfall and brine used to transport the fly ash to the dam. This stu

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2

Mukasa-Mugerwa, Thomas Tendo. "The role of arbuscular mycorrhizal fungi in the biotransformation of coal and application in dump rehabilitation." Thesis, Rhodes University, 2007. http://hdl.handle.net/10962/d1004059.

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Fundamental processes underpinning the biotransformation of coal by fungal biocatalysts have been intensively investigated, however, limited large-scale industrial applications using such systems have been reported. The un-anticipated sporadic growth of Cynodon dactylon on the surface of un-rehabilitated discard coal dumps has been noted and this was found to be coupled with the breakdown of coal into a humic soil-like material in the top 1.5 metres of the dumps. Extensive fungal growth was observed to be associated with the Cynodon dactylon root system and examination of plant roots indicated

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3

Akinyemi, Segun Ajayi. "Geochemical and mineralogical evaluation of toxic contaminants mobility in weathered coal fly ash: as a case study, Tutuka dump site, South Africa." Thesis, University of the Western Cape, 2011. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_1226_1360593017.

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<p>The management and disposal of huge volumes of coal combustion by products such as fly ash has constituted a major challenge to the environment. In most cases due to the inadequate alternative use of coal fly ash, the discarded waste is stored in holding ponds, slag heaps, or stock piled in ash dumps. This practice has raised concerns on the prospect of inorganic metals release to the surface and groundwater in the vicinity of the ash dump. Acceptable scientific studies are lacking to determine the best ash disposal practices. Moreover, knowledge about the mobility patterns of inorganic spe

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4

Mikli, Markus H. "Revegetation of coal mine dumps to ameliorate effects of acidic seepage." Thesis, Curtin University, 2001. http://hdl.handle.net/20.500.11937/213.

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Species prescriptions are developed for revegetating abandoned acidic coal overburden seepage sites in the Collie region of Western Australia. The research involved selecting appropriate plant species and determining successful methods of enhancing revegetation. Candidate species were screened for tolerance to acidic overburden materials, local climate conditions and metal toxicity. Methods tested included improving spoil conditions and trialing an alternative method for seeding.Twelve species of native plants were tested for tolerance in two acid overburden materials in pot and field trials.

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5

Mikli, Markus H. "Revegetation of coal mine dumps to ameliorate effects of acidic seepage." Curtin University of Technology, Department of Environmental Biology, 2001. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=12531.

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Анотація:

Species prescriptions are developed for revegetating abandoned acidic coal overburden seepage sites in the Collie region of Western Australia. The research involved selecting appropriate plant species and determining successful methods of enhancing revegetation. Candidate species were screened for tolerance to acidic overburden materials, local climate conditions and metal toxicity. Methods tested included improving spoil conditions and trialing an alternative method for seeding.Twelve species of native plants were tested for tolerance in two acid overburden materials in pot and field trials.

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6

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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7

Morgenthal, Theunis Louis. "The assessment of topsoil degradation on rehabilitated coal discard dumps / Theunis Louis Morgenthal." Thesis, North-West University, 2003. http://hdl.handle.net/10394/112.

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This study investigates coal discard cover soil fertility and its potential for degradation, particularly in terms of its salinisation and acidification potential. Seven rehabilitated coal discard dumps in the Witbank, Ermelo and Newcastle regions were used as study areas. All areas were rehabilitated with a cover soil layer, revegetated and annually fertilised with nitrate fertilisers, super phosphate, kraal manure and lime. Performance guideline for pH of 5.5-(6.5 i0.5)-7.5 and electrical conductivity guideline of preferably less than 200 mS.rn-' but not higher than 400 mS.m-' were set based

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8

Muchingami, Innocent I. "NON-INVASIVE CHARACTERIZATION OF UNSATURATED ZONE TRANSPORT IN DRY COAL ASH DUMPS: A CASE STUDY OF TUTUKA, SOUTH AFRICA." University of the Western Cape, 2013. http://hdl.handle.net/11394/4268.

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Doctor Scientiae<br>The management of the large volumes of solid wastes produced as coal combustion residue is of particular concern due to the presence of leachable metals and salts which may constitute a long term environmental risk and potential contamination of both surface and groundwater systems of the surrounding environment. In order to implement an efficient monitoring scheme and to assess the impact of the ash dump on the hydrologic system, a thorough knowledge on the migration of solutes fluxes in dry ash dumps as well as the controls on the transport of these solutes to the u

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9

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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10

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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11

Echols, Brandi Shontia. "Use of an environmentally realistic laboratory test organism and field bioassessments to determine the potential impacts of active coal mining in the Dumps Creek subwatershed on the Clinch River, Virginia." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/77326.

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This research was divided into four objectives for assessing the impacts of coal mining on ecosystem health. The first objective was to provide an ecotoxicological assessment in the upper Clinch River using standard bioassessment techniques. Analysis of sediments and interstitial water (porewater) indicate higher concentrations of trace metals in samples from sites located above both a power plant (CRP) and Dumps Creek mining influences. The furthest sampling site located near Pounding Mill, Virginia (CR-PM) had higher concentrations of aluminum (2,250.9 mg/kg), copper (5.9 mg/kg) and iron (12

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12

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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13

Rai, Purna Bahadur, and Sudeep Mahapatro. "Overburden Dump Slope Stability: A Case Study At Coal Mine." Thesis, 2013. http://ethesis.nitrkl.ac.in/5434/1/109MN0590.pdf.

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Slope stability of overburden dumps plays as integral part of opencast mine project throughout the operation process. Waste dumps always have steep angled slopes as the waste has been tipped over from the top of the dump in a continuous and progressive manner. For new landfill it is often desirable to design steep slopes as it can accommodate the maximum amount of waste possible. The heavy machinery implanted for the extraction and transportation of wastes in the opencast mine whose management is of prime importance. The problems relating to overburden dump slope stability is catching attentio

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14

Kennedy, Alan J., and William Kovach. "The use of unconsolidated runoff material in coal waste dump reclamation." 1987. http://hdl.handle.net/2429/14211.

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The effects of using unconsolidated runoff material collected from interceptor ditches as an amendment to soil material on waste dumps was investigated on study plots at Byron Creek Collieries from 1983 to 1986. Thirty-two plots representing replicates of two treatments of runoff material Incorporation were established in random block design on a "typical" coal waste dump. Data were collected on soil quality, vegetation cover and biomass, and tree survival and growth. Results from three years of study indicate the following conclusions. 1. Unconsolidated runoff material appears to impr

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15

"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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16

Nayak, T. "Stability analysis of dump with admixture of fly-ash and overburden material in open-cast coal mines." Thesis, 2014. http://ethesis.nitrkl.ac.in/5952/1/e-119.pdf.

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Dump slopes with admixture of Fly-ash and overburden material for geo-mining conditions of mine A and mine B are simulated in FLAC SLOPE and OASYS software. Stability analysis of dump slope for mine B was carried out by field monitoring using total station and monitoring stations. For mine A, with addition of 15% fly-ash for a 30 m bench, the safe bench angle decreased by 20. This may be attributed to partial filling of the voids. With addition of 30% fly-ash, the safe bench angle increased by 10, which may be attributed to filling of void spaces. For the simulated conditions of 3 decks each o

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17

Tsou, Hsueh-Wei, and 鄒學維. "A 3-D numerical analysis on bearing behavior of grid type ground improvement in coal ash dump site." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/04394306773912851856.

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碩士<br>國立臺灣科技大學<br>營建工程系<br>98<br>Due to the soft ground of coal ash dump site , the building that build upon the coal ash dump site need the improvements of coal ash filled ponds to increase the bearing capacity. This research mainly simulate the bearing behavior of in-situ mixed coal ash by windmill method to use FLAC3D 3.0 (Itasca). Because of the coal ash filled ponds depth variation , this research will analysis all kinds of the enduring situation in the different improvements of the depth coal ash filled ponds. Also, the research will consider the different types of the binder capacity an

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18

Smyth, Clint R. "Establishment and growth of mycorrhizal and rhizobium inoculated high-elevation native legumes on an unamended coal mine spobl dump in Southeastern British Columbia." 1997. http://hdl.handle.net/2429/9961.

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Direct seeding, transplant survivorship, growth and reproductive performance of seven mycorrhizal and Rhizobium inoculated high-elevation native legume species were studied at a coal mine in the Rocky Mountains of southeastern British Columbia. Mycorrhizal and Rhizobium infection levels were low in the control treatment and highest in the combined inoculation treatments of all species. Transplant survival of each species was greatest for the combined inoculation treatment and lowest for the uninoculated control. Inoculation with mycorrhizae, Rhizobium or a combination of mycorrhizae and Rh

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19

RADOŠOVÁ, Tereza. "Hodnocení aktuálního stavu krajiny Mostecka." Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-138192.

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The work is engageded in comparison of flora in both recultivated and areas under succesion in Most coal basin. The mapped areas are situated not far from the towns Most and Duchcov. The coalmining and following recultivation have been handed down there for many years. The first reference to coalmining in Most region comes back to 1613. All kinds of these days mining devastate the landscape, that?s why the restoration of it must be done. The aim of the work is to find out and evaluate the latest vegetation composition in he selected areas, to classify territories according to Catalogue of biot

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20

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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21

HRČKOVÁ, Kristýna. "Algae and cyanobacteria colonizing toxic soils on coal-mining dumps." Master's thesis, 2008. http://www.nusl.cz/ntk/nusl-47968.

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Species composition of soil algal and cyanobacterial communities was investigated in thirteen sites of different toxicity of spoil material on dumps in the Sokolov mining area (Czech Republic). The adaptation ability of various algal and cyanobacterial species to live in toxic environment and the effect of different amendments (wooden coal, organic matter, dolomitic limestone) of toxic soils were tested both in laboratory and field experiments. According to results, species composition corresponded to environmental characteristic (pH, conductivity, substrate type). Some green unicellular algae

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22

Mistry, Pratibha. "The applicability of remote sensing methods for the detection of fires on coal discard dumps." Thesis, 2006. http://hdl.handle.net/10539/1841.

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Faculty of Engineering School of Civil and Enviromental Engineering 9506023j PMISTRY@WEBMAIL.co.za<br>This report investigates the viability of satellite remote sensing in monitoring the rehabilitation of coal discard dumps. Four levels of thermal monitoring data were assessed in this project. These were: ground and below surface temperature probes; aerial thermal and atmospheric monitoring surveys; high altitude aircraft; and satellites. Remote sensing methods measure only variation of temperatures on the surface of the dump. Fires on discard dumps are sub-surface fires, and the depth

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23

Chakravarty, Raj. "Study of Stability of Overburden Dumps Mixed with Flyash in an Opencast Coal Mine." Thesis, 2013. http://ethesis.nitrkl.ac.in/5145/1/109MN0106.pdf.

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The huge quantities of fly ash generated in India (131.09 mn tonnes in 2010-11) by the coal fired thermal power plants every year raises a serious question about its disposal along with the difficult issues of land availability and pollution of local environment. According to MoEF guidelines any mine within 50 km from a power plant has to use at least 25% of its backfill as fly ash. In this project the stability of overburden dumps mixed with fly ash in KTK opencast mine of SCCL has been studied. Samples of overburden and fly ash were collected from KTK mine and APGENCO, Chelpur respectively.

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24

Bradfield, Leonie. "Reliable shear strength estimation for very-high spoil dumps." Thesis, 2018. http://hdl.handle.net/1959.13/1385398.

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Research Doctorate - Doctor of Philosophy (PhD)<br>The shearing behaviour of current and planned coal mine spoil dumps up to 400m in height is studied using large-specimen-high-stress direct shear tests performed on a range of materials that are commonly encountered in the Hunter and Bowen Basin coalfields. The motivation for this research is to address industry concerns that some current spoil dump heights (>350m) are surpassing the scale (≤120m) for which reliable design information exists, and because standard geotechnical laboratory equipment is not able to test representative spoil specim

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25

Berdusco, Roger Joseph, Billie O'Brien, and Carol Elizabeth 1953 Jones. "Successful re-establishment of native trees and shrubs on high elevation coal dumps at Fording River Operations." 1997. http://hdl.handle.net/2429/9867.

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The Fording River Mine, operated by Fording Coal Limited is located in the Rocky Mountains of British Columbia at elevations ranging from 1650 to 2300 m. Research has been conducted at the mine site since 1969 to develop technology for restoring the forest resource and the critical wildlife habitat. Experiments have been conducted to determine the effect of seeding two species of legumes with the conifer species. The effect of an interseed delay of up to five years on various growth parameters of the conifers was assessed. The growth of the conifers was compared to height to age curves develop

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26

Mashau, Aluwani Shiridor. "Quantification of the bioccumulation potential of various chemical elements from coal fly ash using Brassia juncea and Spinacia oleracea L and its implication for phytoremediation of coal fly ash dumps." Diss., 2017. http://hdl.handle.net/11602/908.

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MENVSC<br>Department of Ecology and Resource Management<br>South Africa is highly dependent on coal for production of electricity. The combustion of coal for electricity generation produces waste by-products which include fine ash (fly ash) and coarse ash. Fly ash (FA) is produced in large amounts while its utilization is low due to its classification as a hazardous material. Sasol produces about 7 million tons of FA, while Eskom produces about 28 million tons of coal FA annually. FA is a fine by-product from pulverized coal with detrimental effects on plants, soil or land, animals and human b

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27

"The influence of angle and aspect on the established vegetative cover on the slopes of rehabilitated coal discard dumps in Mpumalanga." Thesis, 2009. http://hdl.handle.net/10210/2099.

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M.Sc.<br>The decommissioning of mines and mining-related activities brings about the onset of rehabilitation. A legacy that most coal mines must address is the rehabilitation of the coal discard dumps that are generated by the beneficiation process of the raw coal. Rehabilitation involves the shaping and covering with a topsoil layer of these coal discard dumps. The topsoil layer is then revegetated to provide a stable form of protection against erosion. Considerations taken into account regarding the rehabilitation of coal discard dumps include the final slope angle, physical constraints i.e.

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28

Bernhäuserová, Veronika. "Dynamika habitatů lindušky úhorní na severočeských hnědouhelných výsypkách." Master's thesis, 2019. http://www.nusl.cz/ntk/nusl-404095.

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Surface mining and its associated territory disturbance is generally perceived negatively by society. However, these newly transformed regions may be very important areas of conservation from biodiversity point of view of and emergence of refugia. This thesis investigates the dynamics of the coal dumps and the land cover changes in relation to the occurrence of endangered species of Tawny pipit (Anthus campestris) in the North Bohemia. This area is the only breeding region in the country for this species. The aim of this thesis is to describe land cover change on three coal dumps (Tušimice, Bí

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29

MÁLKOVÁ, Lucie. "Porovnání diverzity spontánně zarostlých a technicky rekultivovaných výsypek na Mostecku." Master's thesis, 2011. http://www.nusl.cz/ntk/nusl-54998.

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Анотація:

Sites left to spontaneous vegetation succession and those technically reclamed were studied and compared on dumps in the Most Region, NW Czech Republic. Data were sampled in summer 2008 and 2010. Species composition and species diversity were analyzed using phytosociological reléves arranged along 100m transects. Alfa- and beta-diversity were evaluated. There were significant differences between sites in alfadiversity. Beta-diversity was highest in the spontaneously re-vegetated sites. There were also differences in species composition among the studied sites. I consider using spontaneous succ

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