Rozprawy doktorskie: „Coal mines and mining”

1

Forrest, W. "The development of new coal mines". Thesis, University of Nottingham, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378766.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

2

McCoy, 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.

Pełny tekst źródła

Streszczenie:

Thesis (M.S.)--West Virginia University, 2002.
Title 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).

Style APA, Harvard, Vancouver, ISO itp.

3

Noppé, Mark Adrian. "Geological controls for coal exploration and mining". Thesis, Rhodes University, 1992. http://hdl.handle.net/10962/d1005566.

Pełny tekst źródła

Streszczenie:

The identification and interpretation of geological features is essential for the planning and ultimate success of any mining venture. Examples of geological features significant for mining are presented, and their identification during exploration discussed. In particular, the importance of coal qualities, seam thickness and seam elevation are emphasised in relation to longwall mining. Geostatistical analysis provides a powerful tool for improving the prediction and decision-making capabilities of both exploration and mine geologists. The availability of geostatistics, and the benefits resulting from its application, are demonstrated using actual data for calorific value, seam thickness and seam elevation. Contamination of run-of-mine coal is a common problem on highly-mechanised collieries. The problem generally arises from over-cutting of the designated mining horizon. A practical system for monitoring and controlling contamination on a mechanised bord-and-pillar and longwall colliery is presented. The results and benefits of applying such a system are cited for an actual longwall colliery. Numerical geological predictions are not always reported in terms of the reliability of such estimates. Many of these values can be reported in terms of confidence limits, particularly for routine grade control purposes. The methods and benefits of such reporting are described and illustrated by way of examples for calorific value and contamination levels.

Style APA, Harvard, Vancouver, ISO itp.

4

Meyer, Petrus C. "Feasibility of thin seam coal mining at Dorstfontein Coal Mine". Pretoria : [s.n.], 2003. http://upetd.up.ac.za/thesis/available/etd-09072005-113231/.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

5

Harvey, 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.

Pełny tekst źródła

Streszczenie:

Thesis (Ph. D.)--University of North Carolina at Chapel Hill, 2006.
Title 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.

Style APA, Harvard, Vancouver, ISO itp.

6

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/.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

7

Mitchell, Mickey D. "Analysis of underground coal mine refuge shelters". Morgantown, W. Va. : [West Virginia University Libraries], 2008. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5770.

Pełny tekst źródła

Streszczenie:

Thesis (M.S.)--West Virginia University, 2008.
Title from document title page. Document formatted into pages; contains viii, 70 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 69-70).

Style APA, Harvard, Vancouver, ISO itp.

8

Chelin, Monique Josette. "Water in the coal mining industry : an assessment of water management issues facing the coal mining industry of the Witbank and Middelburg Dam catchments". Pretoria : [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-05292006-103231/.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

9

Sellami, Moncef. "Recoverable reserve estimation in multiple seam mines". Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-09192009-040606/.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

10

Meyer, Petrus Cornelius. "Feasibility of thin seam coal mining at Dorstfontein Coal Mine". Diss., University of Pretoria, 2003. http://hdl.handle.net/2263/27806.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

11

Roy, Mimi. "A detailed sequential extraction study of selenium in coal and coal-associated strata from a coal mine in West Virginia". Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4431.

Pełny tekst źródła

Streszczenie:

Thesis (M.S.)--West Virginia University, 2005.
Title from document title page. Document formatted into pages; contains x, 93 p. : ill. (some col.), map (part col.). Vita. Includes abstract. Includes bibliographical references (p. 75-78).

Style APA, Harvard, Vancouver, ISO itp.

12

Griffin, Kenneth R. "Design Criteria for Wireless Mesh Communications in Underground Coal Mines". Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/76759.

Pełny tekst źródła

Streszczenie:

The Mine Improvement and New Emergency Response (MINER) Act of 2006 was enacted in response to several coal mining accidents that occurred in the beginning of 2006. The MINER Act does not just require underground mines to integrate wireless communication and tracking systems, but aims to overall enhance health and safety in mining at both surface and underground operations. In 2006, the underground communication technologies available to the mining industry had inherent problems that limited communication capabilities. Since the passage of the MINER Act, there have been several developing applications for underground wireless communications. Underground wireless communications allow signals to propagate and take multiple paths to destinations providing a survivable, redundant, and adaptable means of communication and tracking. An underground wireless communications allow underground and surface personnel to directly correspond to one another without being as restricted as hardwired systems. Communication systems also allow miners to be tracked underground to provide a real-time or last known post-accident position, and ensure a more efficient rescue operation. In order to increase the overall efficiency of developing communication systems there is a need for modeling of wireless signal propagation in underground mines. Research, modeling, and analysis of wireless signal propagation in underground mines ongoing and developing with underground communications systems as the systems progress. The work on this project is based upon the Accolade system from L-3 Communications Global Security and Engineering Solutions but applies to all underground wireless mesh systems currently available. A general approach is taken to solving underground wireless communications networks to allow the design criteria to be adaptable to other communication systems belong the Accolade system. The data is based upon measurements and field work that took place July 2007 through December 2008 in International Coal Group's Sentinel Mine in Philippi, West Virginia. Comms, a computer method developed at the Virginia Center for Coal and Energy Research at Virginia Tech, allows underground mine communication networks to be solved and analyzed. Comms was developed to solve and analyze underground wireless communication networks. The method which Comms solves communication networks is not mine specific and may be adapted to predict the performance of a system(s) in another mine. The developed model discussed in Chapters 3 and 4 highlights the general signal loss parameters that are encountered by wireless signals in a mine. The model predicted the signal strength observed when encountering those categorized signal losses within 16 percent of the data measured during a mine survey. The model has been developed in a general manner to allow future investigation and pinpointing of additional interferences that occur within the underground environment. Wireless communications have proven to be the way of the future and will continue to be integrated into underground coal mines as mandated by the MINER Act. Wireless communications systems are a redundant and survivable means of communication that will be utilized in not only emergency and rescue efforts but daily operational communication as well.
Master of Science

Style APA, Harvard, Vancouver, ISO itp.

13

Young-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/.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

14

Smith, William Donald. "Ethnicity, class, and gender in the mines : Korean workers in Japan's Chikuhō coal field, 1917-1945 /". Thesis, Connect to this title online; UW restricted, 1999. http://hdl.handle.net/1773/10457.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

15

Crellin, 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.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

16

McGraw, David P. "Analysis of factors affecting wireless communication systems in underground coal mines". Morgantown, W. Va. : [West Virginia University Libraries], 2008. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=6036.

Pełny tekst źródła

Streszczenie:

Thesis (M.S.)--West Virginia University, 2008.
Title from document title page. Document formatted into pages; contains vi, 59 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 57-59).

Style APA, Harvard, Vancouver, ISO itp.

17

Sears, Morgan M. "Implementing energy release rate calculations into the LaModel program". Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10712.

Pełny tekst źródła

Streszczenie:

Thesis (M.S.)--West Virginia University, 2009.
Title from document title page. Document formatted into pages; contains xiii, 82 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 65-66).

Style APA, Harvard, Vancouver, ISO itp.

18

Douglas, Alexander D. "STATUS OF COMMUNICATION AND TRACKING TECHNOLOGIES IN UNDERGROUND COAL MINES". UKnowledge, 2014. http://uknowledge.uky.edu/mng_etds/13.

Pełny tekst źródła

Streszczenie:

In 2006, Congress passed the MINER Act requiring mine operators to submit an emergency response plan that included post-accident communications and tracking systems to MSHA within three years of the Act. These systems were required to be designed for maximum survivability after a catastrophic event, such as a fire or explosion, and to be permissible (meets MSHA criteria for explosion-proof). At that time, no commercially available systems existed that met these standards. Several companies undertook developing new, or enhancing existing, technologies to meet these requirements. This research presents the results of a study that was conducted to determine the present day types of systems being used, along with their average annual worker hours, coal production, number of mechanized mining units, and type of communications and tracking systems installed. Furthermore, 10 mines were visited to obtain detailed information related to the various technologies. It was found the most influential parameters on system selection include MSHA district, mining method, and number of underground workers.

Style APA, Harvard, Vancouver, ISO itp.

19

Li, Zhongxue. "Determining the size and life of underground coal mines". Diss., This resource online, 1987. http://scholar.lib.vt.edu/theses/available/etd-10022008-063243/.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

20

Tarrant, Gregory Colin Mining UNSW. "New concepts in tailgate strata behaviour and implications for support design". Awarded by:University of New South Wales. Mining, 2006. http://handle.unsw.edu.au/1959.4/24004.

Pełny tekst źródła

Streszczenie:

Tailgate stability within longwall coal mining is critical to longwall productivity and safety of mine personnel. A mechanistic model was developed and tested to explain observed high deformation tailgate behaviour characterised by lateral strata movement. Field investigations were conducted at three Australian longwall mines with an emphasis on the measurement of; horizontal strata movement about gateroads during longwall extraction, and the load/deformation characteristics of standing supports. 3D numerical modelling was used to simulate tailgate deformation, and interaction of various support types and design strategies. The sensitivity of strata and support behaviour to; variations in roof geology, strength of sliding interfaces, depth of cover, pre-mining horizontal stress magnitude and orientation, and strength and stiffness characteristics of standing supports was modelled. Laboratory investigations of a standing support product, the ???Can???, at reduced scale (one third) were conducted. The tests determined the loading mechanics of the product and provided a basis for optimisation of the engineering properties (strength and stiffness). Horizontal strata movement about longwall extraction was found to have a significant impact on strata behaviour at two of the three mines investigated. The term ???skew roof??? was coined to describe the deformation process. Essentially the roof strata was found to ???skew??? towards the approaching goaf. The key geotechnical factors found to control the skew roof mechanism were; magnitude and orientation of the pre-mining horizontal stress, presence of weak interfaces along which sliding could occur, and shear strength of the interfaces. Measurement of the nature and extent of skew roof deformation specific to each mine provided a sound engineering basis for support design. These included; the relative roles of long tendons versus standing support, optimal pattern (position across and along the roadway) of standing supports, and appropriate strength and stiffness characteristics. The findings were successfully implemented at Metropolitan Colliery in particular, where adequate tailgate serviceability has been achieved within a high deformation environment, and whilst maintaining a relatively small chain pillar width. The research has achieved an alternative to empirical and trial and error tailgate support design methods.

Style APA, Harvard, Vancouver, ISO itp.

21

Kuhn, Eloise M. R. "Microbiology of fly ash-acid mine drainage co-disposal processes". Thesis, University of the Western Cape, 2005. http://etd.uwc.ac.za/index.php?module=etd&amp.

Pełny tekst źródła

Streszczenie:

The waste products acid mine drainage formed during coal mining and fly ash from coal burning power generation, pose substantial environmental and economic problems for South Africa. Eskom has developed a remediation system employing alkaline fly ash to neutralize and precipitate heavy metals from toxic acidic acid mine drainage streams. The aim of this study was to assess the microbial diversity in and microbial impact on this remediation system.

Style APA, Harvard, Vancouver, ISO itp.

22

Ray, Anil Kumar. "Influence of cutting sequence and time effects on cutters and roof falls in underground coal mine numerical approach /". Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10026.

Pełny tekst źródła

Streszczenie:

Thesis (Ph. D.)--West Virginia University, 2009.
Title from document title page. Document formatted into pages; contains xvi, 285 p. : ill. (some col.), col maps. Includes abstract. Includes bibliographical references (p. 278-285).

Style APA, Harvard, Vancouver, ISO itp.

23

Mack, Ben M. "Water quality changes over time in Upper Freeport and Pittsburgh coal mines in West Virginia". Morgantown, W. Va. : [West Virginia University Libraries], 2008. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5623.

Pełny tekst źródła

Streszczenie:

Thesis (M.S.)--West Virginia University, 2008.
Title from document title page. Document formatted into pages; contains x, 81 p. : ill. (some col.), col. map. Includes abstract. Includes bibliographical references.

Style APA, Harvard, Vancouver, ISO itp.

24

Zahiri, 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.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

25

Kleski, Kurt W. "GIS Uses for Modeling Subsurface Conditions in Ohio Coal Mines". Ohio University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1511877505215923.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

26

Tusing, Donald S. "Modular track panels for improved safety in the mining transportation industry". Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=2853.

Pełny tekst źródła

Streszczenie:

Thesis (M.S.)--West Virginia University, 2003.
Title from document title page. Document formatted into pages; contains xiv, 158 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 141).

Style APA, Harvard, Vancouver, ISO itp.

27

Salyer, Melanie. "An evaluation of the economic and environmental impacts of coal mining Flat Gap, Pound, Wise County, Virginia, as case study : a thesis presented to the Department of Geology and Geography in candidacy for the degree of Master of Science /". Diss., Maryville, Mo. : Northwest Missouri State University, 2006. http://www.nwmissouri.edu/library/theses/SalyerMelanie/index.htm.

Pełny tekst źródła

Streszczenie:

Thesis (M.S.)--Northwest Missouri State University, 2006.
The full text of the thesis is included in the pdf file. Title from title screen of full text.pdf file (viewed on January 25, 2008) Includes bibliographical references.

Style APA, Harvard, Vancouver, ISO itp.

28

Eades, Robert. "MODERN ROCK DUST DEVELOPMENT AND EVALUATION FOR USE IN UNDERGROUND COAL MINES". UKnowledge, 2016. http://uknowledge.uky.edu/mng_etds/27.

Pełny tekst źródła

Streszczenie:

Following the promulgation of new permissible respirable dust standards by MSHA in 2014, new alternative rock dusts were created that combined the advantages of current industry applications while potentially reducing miner exposure to respirable dust. Research was performed to compare the explosion suppressing and ejection characteristics of three new types of rock dust to existing rock dust types. Explosion suppression tests were conducted in a 38-L chamber where pressures were recorded. Angle of ejection tests were conducted using a high explosive shock tube and high speed photography to determine angle of ejection and lift velocity. A comprehensive comparison of the results of these tests shows that these newly developed dusts have improved results for flame suppression and ejection when compared to typical wet dust applications.

Style APA, Harvard, Vancouver, ISO itp.

29

Moses, Lucian Benedict. "Flotation as a separation technique in the coal gold agglomeration process". Thesis, Cape Technikon, 2000. http://hdl.handle.net/20.500.11838/2155.

Pełny tekst źródła

Streszczenie:

Thesis (MTech (Chemical Engineering))--Cape Technikon, 2000.
Internationally, there is an increase in the need for safer environmental processes that can be applied to mining operations, especially on a small scale, where mercury amalgamation is the main process used for the recovery of free gold. An alternative, more environmentally acceptable, process called the Coal Gold Agglomeration (CGA) process has been investigated at the Cape Technikon. This paper explains the application of flotation as a means of separation for the CGA process. The CGA process is based on the recovery of hydrophobic gold particles from ore slurries into agglomerates formed from coal and oil. The agglomerates are separated from the slurry through scraping, screening, flotation or a combination of the aforementioned. They are then ashed to release the gold particles, after which it is smelted to form gold bullion. All components were contacted for fifty minutes after which a frother was added and after three minutes of conditioning, air, at a rate of one I/min per cell volume was introduced into the system. The addition of a collector (Potassium Amyl Xanthate) at the start of each run significantly improved gold recoveries. Preliminary experiments indicated that the use of baffles decreased the gold recoveries, which was concluded to be due to agglomerate breakage. The system was also found to be frother-selective and hence only DOW-200 was used in subsequent experiments. A significant increase or decrease in the air addition rate both had a negative effect on the recoveries; therefore, the air addition rate was not altered during further tests. The use of tap water as opposed to distilled water decreased the attainable recoveries by less than five per cent. This was a very encouraging result, in terms of the practical implementation of the CGA process.

Style APA, Harvard, Vancouver, ISO itp.

30

Kolli, Shiva Prasad B. "Analyses of coal extraction and spoil handling techniques in mountainous areas". Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=1971.

Pełny tekst źródła

Streszczenie:

Thesis (M.S.)--West Virginia University, 2001.
Title from document title page. Document formatted into pages; contains x, 64 p. : ill. (some col.), maps. Includes abstract. Includes bibliographical references (p. 63-64).

Style APA, Harvard, Vancouver, ISO itp.

31

Puri, Ritu. "Model development, testing and computer implementation for a coal blending and distribution problem". Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-10222009-125132/.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

32

Veldman, Kirmar Adriaan. "A focussed approach towards safety in support of coal mining operations in the South African coal mining industry". Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/978.

Pełny tekst źródła

Streszczenie:

Thesis (MBA (Business Management))--University of Stellenbosch, 2009.
ENGLISH ABSTRACT: The South African Mining industry has had a poor safety performance over the past couple of years, which led to a lot of questions being asked about how effective mining operations are managed. Numerous concerns and opinions have been raised on the reasons why no improvement is seen in organisations’ safety trends. The general concern in the mining industry is that safety and operations are managed as separate entities and not as an integrated unit. Besides the perception of operational issues that are managed more diligently than safety issues, the associated competency levels of line personnel are also questioned. Safety management systems in mining organisations are also under the spotlight in respect of quality, effective application and a positive contribution in preventing accidents and incidents. A more intensified focus on safety is required by the respective mining houses. The main contributing factors that lead to accidents and incidents need to be determined. The possible reasons for the unsatisfactory safety results can be divided into controllable and uncontrollable elements when seen from a safety perspective. The controllable elements are all possible reasons for why a safety management system is not working. There might also be different contributors to poor safety performance but these are definitely underlying to the main reasons identified. The influence of human behaviour on accidents as well as the considered organisation safety system is essential in safety management. Human behaviour is a function of the characteristics of both the person and the environment. Individuals bring elements to the organisational setting, including abilities, personal beliefs, expectations and past experiences. The environment provided by an organisation has a number of features: jobs, relationships between people, work that needs to be done, rewards available to individuals, and so on. Behaviour results from the interaction of individual and organisational characteristics. The behaviour of humans and the understanding thereof will be a science in its own right. To prevent incidents, one should know their causes. As Louis Pasteur put it, over 100 years ago: “All things are hidden obscure and debatable if the cause of the phenomena be unknown, but everything is clear if the cause be known.”
AFRIKAANSE OPSOMMING: Die Suid-Afrikaanse mynboubedryf presteer die afgelope aantal jaar swak wat betref veiligheidsbestuur en ŉ hele aantal vrae word gevra oor hoe effektief mynbouoperasies bestuur word. Verskeie besorgdhede en opinies is gelug oor die moontlike redes waarom daar geen verbetering in ondernemings se veiligheidsindekse ervaar word nie. Die algemene bekommernis in die mynboubedryf is dat veiligheid en operasionele verantwoordelikhede afsonderlik bestuur word en nie as ŉ geïntegreerde eenheid nie. Afgesien van die persepsie dat operasionele uitdagings meer doelgerig bestuur word as veiligheid, word die gepaardgaande bevoegdheidsvlakke van lynpersoneel ook bevraagteken. Veiligheidsbestuurstelsels in mynbouondernemings is ook onder verdenking wat betref gehalte, effektiewe toepassing en ’n positiewe bydrae ten opsigte van ondersteuning en voorkoming van insidente en ongelukke. ŉ Meer intense fokus op veiligheid word benodig by die onderskeie mynhuise. Die belangrikste bydraende faktore wat tot ongelukke en insidente lei, moet bepaal word. Die moontlike redes vir onbevredigende veiligheidsresultate kan verdeel word in beheerbare en onbeheerbare elemente wanneer gesien vanuit ŉ veiligheidsperspektief. Die beheerbare elemente is moontlike redes waarom ŉ veiligheidbestuurstelsel nie werk nie. Daar kan moontlik ook ander bydraende faktore wees tot ŉ swak veiligheidsprestasie maar dit is definitief onderliggend tot die hoofredes soos geïdentifiseer. Die invloed van menslike gedrag op ongelukke sowel as die inaggenome veiligheidstelsel van die organisasie is essensieel by veiligheidsbestuur. Menslike gedrag is ŉ funksie van die eienskappe van beide die persoon en die omgewing. Individue bring sekere elemente na die organisatoriese opset wat vermoëns, persoonlike oortuigings, verwagtings en ondervinding insluit. Die omgewing geskep deur organisasies behels ŉ aantal elemente: werksomskrywing, verhoudings tussen mense, werk wat gedoen moet word, vergoeding van individue, ens. Gedrag is die resultaat van die interaksie tussen individue en die kenmerke van die organisasie. Die gedrag van mense en begrip daarvan sal ŉ wetenskap in eie reg bly. Om insidente te verhoed, moet die oorsake bekend wees. Soos Louis Pasteur dit meer as 100 jaar gelede gestel het: “All things are hidden obscure and debatable if the cause of the phenomena be unknown, but everything is clear if the cause be known.”

Style APA, Harvard, Vancouver, ISO itp.

33

Sun, Zhouming. "Reliability-based method for stability of mine entry design and evaluation". Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1575.

Pełny tekst źródła

Streszczenie:

Thesis (Ph. D.)--West Virginia University, 2000.
Title from document title page. Document formatted into pages; contains xi, 162 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 156-161).

Style APA, Harvard, Vancouver, ISO itp.

34

Shultz, James Edward. "Programmable logic controllers and supervisory control and data acquisition a system design for increased availability". Ohio : Ohio University, 1991. http://www.ohiolink.edu/etd/view.cgi?ohiou1239733126.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

35

Demchak, Jennifer L. "Water quality changes of underground mines in northern West Virginia". Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4384.

Pełny tekst źródła

Streszczenie:

Thesis (Ph. D.)--West Virginia University, 2005.
Title from document title page. Document formatted into pages; contains x, 77 p. : ill. (some col.), col. maps. Includes abstract. Includes bibliographical references.

Style APA, Harvard, Vancouver, ISO itp.

36

Gurgenli, Hakan. "Geomechanical and weathering properties of weak roof shales in coal mines". Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4717.

Pełny tekst źródła

Streszczenie:

Thesis (M.S.)--West Virginia University, 2006.
Title from document title page. Document formatted into pages; contains ix, 99 p. : ill. (some col.), maps (part col.). Includes abstract. Includes bibliographical references (p. 77-81).

Style APA, Harvard, Vancouver, ISO itp.

37

Maneya, George Jameson. "An integrated study of coal geology and potential environmental impact assessment at Mchenga Coal Mine in Livingstonia Coalfield in Malawi". Thesis, University of Fort Hare, 2012. http://hdl.handle.net/10353/480.

Pełny tekst źródła

Streszczenie:

This study was carried out on the main coal-producing and the extensively block-faulted area of Mchenga Coal Mine, southeast of the 90 km2 intracratonic Livingstonia Coalfield in the north of Malawi. It was initiated against the background of indistinct information on coal geology, shortage of energy and potential environmental threats due to mine activities. The study aimed at integrating investigations of characterization of the lithostratigraphy, coal seam correlation, coal quality determination, examination of the mineralogy and geochemistry of coal and hosts rocks, assessment of water quality and providing information for mining and potential environmental and water quality impact assessment in the study area. The methodologies used in this study include literature review, field visits, mapping, sites selection and characterization, borehole logging, geochemical analyses, data processing and interpretation. The geochemical analyses include proximity analysis of coal quality, microscopy and X-ray Diffraction for mineralogy and petrology, X-ray Fluorescence (XRF) for rock geochemistry and Atomic Absorption Spectrometry for determination water geochemistry. The results have shown that a) The Coal Measures comprises of four to six coal seams in different localities, and the occurrence is flat and gently dipping southeast and are correlated. Thicknesses of the coal seams vary from 0.10m to 3.0m with some notable lateral and horizontal variations. Thick and workable seams occupy the lower portion of the Coal Measures and are exposed along the North Rumphi River bank; b) Coal quality belongs to sub-bituminous ‘A’ to ‘C’ on ASTM classification (1991), being characterised by low moisture content (0.8 to 1.3 wt percent) and sulphur content (0.49 to 0.85 wt percent), high ash content (9.0 to 17 wt percent) and volatile matter (24 to 32.9 wt percent), fixed carbon (53.6 to 62.6 wt percent), calorific value (7,015 to 7,670 kcal/kg); c) Mineral matters constitute approximately 9.55 to 38.34 wt percent of the coal samples, predominantly clays (interstratified illite/smectite and kaolinite) with varying proportions of quartz, mica and feldspars, as well as minor calcite and pyrite and their geochemistry, being characterised by enrichment of SiO2 from 5.37 to 20.56 wt percent, Al2O3 (2.63 to 11.21 wt percent) and K2O (0.32 to 3.65 wt percent) with trace concentrations of CaO (0.04 to 0.41 wt. percent), MgO (0.08 to 0.65 wt percent) and P2O5 (0.018 to 0.037 wt percent) and Na2O concentration notably below 0.01 wt percent; d) Calcite and pyrite constitute minor concentration in both sandstones and shales; e) Water quality in the area is characterised as two groups of acidic (pH 3.3-6.4) and near-neutral to slightly alkaline (pH 6.9-7.3) and low pH, high TDS, SO42- and EC are noted at the coal crusher plant which points out to high leaching of trace elements such as Pb and Fe. Na++K+ are dominant in upper sections of North Rumphi and Mhlepa Rivers. Ca2+ cations are dominant at crusher plant, underground mine and lower section of Mhlepa; f) Based on the geochemistry analysis, Na and trace elements such as Ti, V, Mn, Fe, Zn, Rb, Sr and Zr from coal and host rocks have the ability to contribute significantly to deterioration in the ground and surface water quality in the study area. It can be concluded that the coals of the Livingstonia Coalfield belong to Gondwana group deposited in sub-basin with multiple seams embedded in sandstone and shale host rocks.

Style APA, Harvard, Vancouver, ISO itp.

38

Saifee, Quaid J. "Strategic and tactical models and algorithms for the coal industry under the 1990 Clean Air Act". Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-09292009-020130/.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

39

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/.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

40

Mutambanengwe, Cecil Clifford Zvandada. "The biotechnology of hard coal utilization as a bioprocess substrate". Thesis, Rhodes University, 2010. http://hdl.handle.net/10962/d1003993.

Pełny tekst źródła

Streszczenie:

The development of coal biotechnology, using hard coal as a substrate, has been impeded by its low reactivity in biological processes. As a result, the more successful application studies have focused on lignitic soft coals. However, new studies have reported using biologically or geologically oxidized hard coal as a functional substrate option for bioprocess applications on a large scale. This study undertook a preliminary investigation into the feasibility of environmental applications of coal biotechnology using oxidized hard coal substrates in both anaerobic and aerobic processes with carbon dioxide, sulfate and oxygen as terminal electron acceptors. A preliminary characterization of the oxidized hard coal substrates was undertaken to determine and predict their viability and behavior as electron donors and carbon sources for environmental bioprocess applications of direct interest to the coal mining industry. Both biologically and geologically oxidized coal substrates showed loss of up to 17% and 52% carbon respectively and incorporation of oxygen ranging from 0.9 – 24%. The latter substrate showed greater loss of carbon and increased oxygenation. The biologically and geologically oxidized hard coal substrates were shown to partition readily into 23% and 32% organic humic acid, a 0.1% fulvic acid fraction and 65% and 59% inorganic and humin fractions respectively. These organic components were shown to be potentially available for biological consumption. In the unmodified hard coal substrate, partitioning was not observed and it did not perform as a functional substrate for any of the bioprocesses investigated. Where carbon dioxide was used as a terminal electron acceptor, methane production ranging from 9 – 26 mg CH4.g substrate-1 was demonstrated from both oxidized coal substrates. Geologically oxidized coal produced 30% more methane than biologically oxidized coal. Methane yields from the geologically oxidized coal in the presence and absence of a co-substrate were 5 – 13-fold higher than previous studies that used hard coal for methanogenesis. Based on these results, and that the development and optimization of the biological oxidation process is currently ongoing, further applications investigated in this study were undertaken using geologically oxidized coal. It was shown using pyrolysis gas chromatography mass spectrometry that the methanogenic system was dependent on the presence of an effective co-substrate supporting the breakdown of the complex organic structures within the oxidized hard coal substrate. Also that the accumulation of aromatic intermediate breakdown compounds predominantly including toluene, furfural, styrene and 2-methoxy vinyl phenol appeared to become inhibitory to both methanogenic and sulfidogenic reactions. This was shown to be a more likely cause of reactor failure rather than substrate exhaustion over time. Evidence of a reductive degradation pathway of the complex organic structures within the oxidized hard coal substrates was shown through the production, accumulation and utilization of volatile fatty acids including acetic, formic, propionic, butyric and valeric acids. Comparative analysis of the volatile fatty acids produced in this system showed that geologically oxidized coal produced 20% more of the volatile fatty acids profiled and double the total concentration compared to the biologically oxidized coal. The use of geologically oxidized hard coal as a functional substrate for biological sulfate reduction was demonstrated in the neutralization of a simulated acid mine drainage wastewater in both batch and continuous process operations. Results showed an increase in pH from pH 4.0 to ~ pH 8.0 with sulfide production rates of ~ 86 mgL-1.day-1 in the batch reactions, while the pH increased to pH 9.0 and sulfide production rates of up to 450 mgL-1.day-1 were measured in the continuous process studies using sand and coal up-flow packed bed reactors. Again, the requirement for an effective co-substrate was demonstrated with lactate shown to function as a true co-substrate in this system. However, a low cost alternative to lactate would need to emerge if the process was to function in large-scale commercial environmental treatment applications. In this regard, the aerobic growth and production of Neosartorya fischeri biomass (0.64 g.biomass.g SOC-1) was demonstrated using oxidized hard coal and glutamate as a co-substrate. Both can be produced from wastes generated on coal mines, with the fungal biomass generated in potentially large volumes. Preliminary demonstration of the use of the fungal biomass as a carbon and electron donor source for biological sulfate reduction was shown and thus that this could serve as an effective substrate for anaerobic environmental treatment processes. Based on these findings, an Integrated Coal Bioprocess model was proposed using oxidized hard coal as a substrate for environmental remediation applications on coal mines. In this approach, potential applications included methane recovery from waste coal, use of waste coal in the treatment of acid mine drainage waste waters and the recovery and use of humic acids in the rehabilitation of open cast mining soils. This study provided a first report demonstrating the use of biologically and geologically oxidized hard coals as bioprocess substrates in environmental bioremediation applications. It also provided an indication that follow-up bioengineering studies to investigate scaled-up applications of these findings would be warranted.

Style APA, Harvard, Vancouver, ISO itp.

41

DeFreez, Richard K. "A diode laser source for DIAL methane measurements in coal mines /". Full text open access at:, 1985. http://content.ohsu.edu/u?/etd,82.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

42

Dillon, Helena Joy. "Rogernomics and Rupture: Huntly's Response to the Corporatisation of State Coal Mines in 1987". Thesis, University of Canterbury. Humanities, 2010. http://hdl.handle.net/10092/4873.

Pełny tekst źródła

Streszczenie:

This thesis captures the memories of the 1987 Huntly mineworkers who were severely impacted by the corporatisation of State Coal Mines. There were just 19 days between the announcement of job-loss numbers and employment notices being sent out. Over half of the workforce was made redundant. For some of the miners, there were opportunities and new challenges, for others it was the end of their working lives. This thesis considers how the redundancies affected the miners, their families, and the wider community. As a coal town, Huntly is steeped in mining tradition. There was an unwritten social contract between State Coal Mines and the community, which was replaced with a clause advocating social responsibility in the State-Owned Enterprises Act. Miners share a deep sense of camaraderie, reinforced by their dangerous working conditions. Social employment policies meant that generations of a wider family network could be working together in one location. Huntly was placed under enormous strain as a result of the widespread redundancies. A level of social dysfunction, including illiteracy and domestic violence, became apparent in Huntly during this time. Despite the shock, the community rallied around to support the miners, and to explore options for future business and employment in Huntly. This thesis is based on oral history and examines the response of those who were affected in 1987. Their recollection of the corporatisation process and the effects it had on their community are revealing. Furthermore, this thesis explores the reaction of the community to the redundancies and highlights initiatives that were implemented to mitigate the effects. The miners’ perspective of how corporatisation affected their community, and the challenges Huntly faces to the present day, are also considered.

Style APA, Harvard, Vancouver, ISO itp.

43

Samson, Daniel Joseph. "Industry and improvement, state and class formations in Nova Scotia's coal-mining countryside, 1790-1864". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq20585.pdf.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

44

Wade, Scott A. "Stream flow characterization over longwall coal mines in Pennsylvania, Ohio, and West Virginia". Morgantown, W. Va. : [West Virginia University Libraries], 2008. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5655.

Pełny tekst źródła

Streszczenie:

Thesis (M.S.)--West Virginia University, 2008.
Title from document title page. Document formatted into pages; contains xi, 322 p. : ill. (some col.), maps (some col.). Includes abstract. Includes bibliographical references (p. 212-217).

Style APA, Harvard, Vancouver, ISO itp.

45

Krco, Zeljko. "Interaction between mine and plant in coal processing /". [St. Lucia, Qld.], 2005. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18633.pdf.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

46

Permana, Herry. "Development strategy to prevent mine accidents in surface coal mines in Indonesia". Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2014. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-144548.

Pełny tekst źródła

Streszczenie:

Most of mining operations in Indonesia use open pit mine methods, with truck and shovel system and a large amount of manpower. The mining industry plays an important role contributed to the national economy and development in Indonesia, otherwise the mine accidents become as sensitive issue or problem. The main cause of mine accidents is still dominant of the low safety awarenesses and accountabilities, and also improperly cost spent on the occupational health and safety (OSH) programs. This thesis describes the concept behind the return on prevention and workers‟ perception descriptive analyses of the occupational health and safety in relation to improve safety performances. The proactive action plan related to accidents prevention is as an essential step of the risk management processes. Participation and intervention for all employees are important and urgent, especially for the frontline workers, which are crucial in achieving good safety performances with financial support properly. The main objective of this study evaluates of the workers‟ perception and cost spent on the occupational health and safety program at the companies in relation to accident prevention efforts. In general, the several objectives are described to evaluate of the mine accident rates, the validity and reliability tests of the questionnaires, workers relationships and suggestions, interviews, observations, and the OSH cost effectiveness. The methods of this study are assessed by the descriptive statistical analysis approaches of the return on prevention with the microeconomic model of the net present value, internal rate of return, and cost benefit analysis to justify the benefits return and the break even point and interventions directly according to the workers‟ perception through questionnaire, interview, and observation. The methodology is assessed by the gathering data obtained from the companies through the surveys of the questionnaire, interview, observation, and the money expenses in the occupational health and safety for the workers. The valuation methods are used by the degree of significance of 95%, margin of error 5%, with total number of respondents are 1,600 persons as sampling which representation of the four surface coal mine companies in Indonesia. The seven elements are a basic assessment approached of the training and education, personal protective equipment, preventive medical check up, employment injury insurance, improvement existing technology, signalization, and organization. The result shows the advantages using these analyses which described the importance of the money invested on OSH and effectiveness of interventions by worker‟s perception in order to prevent accidents at workplace. The effectiveness of interventions to the environment working conditions and workers mindsets directly. The OSH cost invested for workers, in general, will triggers the work performances to be better, and then the occupational health and safety in a strong position to achieve the goals of the company. Improvement safety awareness and accountability of workers shall reduce or prevent accidents at work, and the company should be invested money in the OSH program with the minimum amount is US $ 207.17 per employee or US $ 0.12 per ton of coal produced. The investment of the people and money properly shall give significant impacts in preventing accidents to achieve zero accident vision in order to protect people, property, process and profit of the company for short or long term benefits, and will also give a good images for sustainable in mining business.

Style APA, Harvard, Vancouver, ISO itp.

47

Xu, Qiang. "Analytical determination of strain energy for the studies of coal mine bumps". Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10115.

Pełny tekst źródła

Streszczenie:

Thesis (M.S.)--West Virginia University, 2009.
Title from document title page. Document formatted into pages; contains iv, 62 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 59-62).

Style APA, Harvard, Vancouver, ISO itp.

48

Tshivhandekano, Aubrey Ndinannyi. "Documenting reclamation and closure of Ermelo coal mines : implications for developing a national strategy for mine reclamation in South Africa". Diss., Pretoria : [s.n.], 2004. http://upetd.up.ac.za/thesis/available/etd-12082005-152604.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

49

Alden, Matthew G. "Remote sensing techniques for monitoring coal surface mining and reclamation in the Power River Basin". Ohio : Ohio University, 2009. http://www.ohiolink.edu/etd/view.cgi?ohiou1257279388.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

50

Jones, Tristan H. "Development of a high-resolution target movement monitoring system for convergence monitoring in mines". Diss., Rolla, Mo. : Missouri University of Science and Technology, 2008. http://scholarsmine.mst.edu/thesis/pdf/Jones_09007dcc804d4863.pdf.

Pełny tekst źródła

Streszczenie:

Thesis (Ph. D.)--Missouri University of Science and Technology, 2008.
Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed May 6, 2008) Includes bibliographical references (p. 229-235).

Style APA, Harvard, Vancouver, ISO itp.

Rozprawy doktorskie na temat „Coal mines and mining”

Utwórz poprawne odniesienie w stylach APA, MLA, Chicago, Harvard i wielu innych