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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

The expected value of catastrophes in underground coal mines 1987-2001

Alexander, Danrick W. January 1900 (has links)
Thesis (Ph. D.)--West Virginia University, 2006. / Title from document title page. Document formatted into pages; contains xii, 226 p. : ill. (some col.), maps (some col.). Vita. Includes abstract. Includes bibliographical references (p. 214-225).
2

A study of the relationship between coal mine fatalities and the length of time a mine has been opened

Dorset, Nancy L., January 1900 (has links)
Thesis (M.S.)--West Virginia University, 2002. / Title from document title page. Document formatted into pages; contains xi, 106 p. : ill. Vita. Includes abstract. Includes bibliographical references (p. 103-105).
3

Coal mine flood risk assessment in Wuda coal mining area: using GIS and remote sensing data and hydrological model. / CUHK electronic theses & dissertations collection

January 2013 (has links)
在中国,绝大多数煤矿事故主要是由煤矿瓦斯和煤矿突水造成。统计数据显示,目前煤矿水灾引起的直接经济损失已经排在了所有煤矿灾害之前,煤矿水灾已经日益成为最危险的一种煤矿灾害。现阶段在煤矿完全方面主要目标就是尽量减少发生煤矿瓦斯爆炸和水灾的隐患。因此,对于预防和处理煤矿水灾来说,设计一种快速且准确的煤矿水灾的风险评价方法是非常急需的。传统的风险评价方法需要进行大量的广泛的地质调查来寻找地表裂隙等引起煤矿水灾的分险源。这些裂隙主要是因为地面形变造成,这种地面形变在煤矿区一般是由于地下采矿活动或者煤火造成塌陷引起的,或者两者共同作用引起的。一般情况下,煤矿区地处偏远,高海拔,不宜居住的地方,尤其是有煤火的地方,更加不易进行全面地调查。因此,我们认为使用卫星遥感数据对煤矿区大范围周期性的监测,并及时提取与煤矿水灾相关的信息进行风险分析的方法相对与传统方式来说更为便捷,更为及时。经过对乌达煤矿区的野外调查,我们确定了一些会引起乌达煤矿水灾的致灾因素,例如煤火,剥挖坑,渣堆等特有的因素。 / 本论文提出一个利用遥感,地理信息技术以及水文模型相结合的煤矿区水灾分险评估模型。在这个模型中,首先根据地质和水文数据确定了14个引起该地区水灾灾害的主要影响因素。通过野外调查,专家组一致认为降雨,特别是大暴雨,剥挖坑和地表裂隙是乌达煤矿区最重要的几个因素。分析野外调查成果,可以发现煤火和沉降与试验区地表裂隙有着正相关性。因此在这个模型中,引入煤火和沉降信息来代替实际地表裂隙情况。煤火和沉降信息可以通过多种遥感数据获得。在获得所有致灾因素的信息后,结合专家组的意见,通过层次分析法(AHP)来建立致灾因素的层次并通过成对比较矩阵计算各个致灾因素的权重。最后,通过模型计算得到最终的煤矿区风险评估图。本文得到的结果与神华(北京)遥感勘查有限责任公司实地调查后形成的风险评估图进行对比,结果显示风险分布基本相同。本文也探讨了可能造成两者差异的原因。最后,针对某一高风险区进行实地的钻孔和地震探测验证,结果显示该地区的致灾因素特征明显,具备高风险特性。 / 验证结果表明,本文提出的方法是具有可操作性的且准确高效,具有一定的煤矿水灾预测作用。我们希望该方法通过进一步的改进,能够应用到实际的煤矿水灾风险评价预测中去。 / In China, coal mine accidents were mainly caused by gas and water inrush. Recently, the direct economic loss caused by coal mine flood has been ranked the first among all kinds of coal mine disasters. Reducing water inrush accidents become the main direction and aiming of coal mine security control. From the statistics of coal mine disasters, we learned that the coal mine flood disasters have become the most dangerous mine disaster. There is, therefore, an urgent need to design and provide a coal mine flood risk assessment timely and accurately for mine companies to prevent and deal with the coal mine flood. Traditional approaches investigate the geological condition and find out the exactly numbers and width of fissures caused by coal mining or coal fires burnt. However, the shortcomings of these methods are time consuming, difficult to repeat, and costly to apply over large areas, especially, for many coal mine area located in isolated region, high up in the mountains, in dense forests, and other inhospitable terrains. Hence the use of GIS technology and remote sensing data, particularly satellite remote sensing with a capability of repeated observation of the earth surface, was considered as a very effective approach to detect, analyze and monitor information of mine flood in coal mine area over a large areas. / In this research a risk assessment model was proposed to assess the mine flood risk in Wuda coal mine area using RS, GIS techniques and basic hydrological model. First of all, we analyzed the major factors causing coal mine flood in Wuda coal field, based on the geological and hydrological data. According to the investigated material and the experiences from geologists and coal mining experts, four main criteria including water sources, surface condition, water conductors and water containers as well as fourteen factors were selected to participate the assessment, among which, rainfall, stripping digging pits and fissures were considered as the three main factors to cause mine flood in Wuda coal mine area. The rainfall and sinks information were easily to derive. However, the fissures information was difficult to obtain. Based on the analysis of investigation, the positive correlation between fissures and coal fires or subsidence was obtained. Therefore, the coal fire factor and ground subsidence factor were imported to indicate the fissures information. Then, a method for deriving these impact factors was proposed for coal mine flood risk assessment model. After obtaining the all factors related information, the weights of these factors were calculated by pair-wise comparison method, which depend on the specialists’ opinions. A risk assessment analysis approach based on AHP was created for combining these factors and calculating the results. / Finally, based on the result from risk assessment model, a risk assessment indication map was generated using GIS software. By comparing our assessment result with the Wuda coal flood risk map from Shenhua Group, we noticed that the distribution and levels of coal mine flood risk are similar. Some other auxiliary techniques, for instance, the geological drilling and geological radar detection, were used to validate the result of our study. These techniques also proved the final result is reasonable and acceptable. After the investigation and evaluation, some conclusions and suggestions, were proposed for coal mine companies to avoid or reduce the risk from coal mine flood. / The results indicate that the methodology is effective and practical; thus, it has the potential to forecast the ood risk for coal mine ood risk management. Therefore, it can be used as a final risk assessment model for mine flooding in coal fire area. In the future, we will conduct such risk analysis to mitigate the impact from coal mine flood disasters. / Detailed summary in vernacular field only. / Detailed summary in vernacular field only. / Detailed summary in vernacular field only. / Wang, Shengxiao. / Thesis (Ph.D.)--Chinese University of Hong Kong, 2013. / Includes bibliographical references (leaves 162-174). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstracts also in Chinese. / Abstract --- p.i / TABLE OF CONTENT --- p.vi / LIST OF TABLES --- p.ix / LIST OF FIGURES --- p.x / Acknowledgements --- p.xiii / Chapter 1. --- Introduction --- p.1 / Chapter 1.1 --- Coal mine disasters in China --- p.1 / Chapter 1.2 --- Coal mine flood in China --- p.4 / Chapter 1.3 --- Background of Wuda coal mine area --- p.6 / Chapter 1.4 --- Research objectives --- p.9 / Chapter 1.5 --- Structure of the thesis --- p.11 / Chapter 2. --- Background --- p.12 / Chapter 2.1 --- Coal mine flood --- p.12 / Chapter 2.1.1 --- Classification of coal mine flood --- p.12 / Chapter 2.1.2 --- Current rescuing situation of coal mine flood --- p.13 / Chapter 2.2 --- The Longwall coal mining --- p.14 / Chapter 2.3 --- Coal mining Subsidence --- p.19 / Chapter 2.3.1 --- Subsidence Mechanisms --- p.19 / Chapter 2.3.2 --- Subsidence and Fissures --- p.20 / Chapter 2.3.3 --- Previous investigations --- p.22 / Chapter 2.4 --- Coal fire and fissures --- p.24 / Chapter 2.4.1 --- Definition and Classification --- p.24 / Chapter 2.4.2 --- Combustionmechanism --- p.27 / Chapter 2.4.3 --- Production of coal fire - Minerals and Burnt rock --- p.29 / Chapter 2.4.4 --- Ground temperature related to the coal fire --- p.31 / Chapter 2.4.5 --- Fissures caused by Coal fire --- p.32 / Chapter 2.4.6 --- Detecting Coal Fires Using Remote Sensing --- p.34 / Chapter 2.5 --- Assessment methods review --- p.37 / Chapter 3. --- Description of the study areas & data sets --- p.39 / Chapter 3.1 --- Study area --- p.39 / Chapter 3.2 --- Geography --- p.40 / Chapter 3.2.1 --- Geographical position --- p.40 / Chapter 3.2.2 --- Climate --- p.41 / Chapter 3.3 --- Geology --- p.42 / Chapter 3.3.1 --- Geology structure --- p.42 / Chapter 3.3.2 --- The stratigraphy of coal --- p.43 / Chapter 3.4 --- Hydrology --- p.46 / Chapter 3.4.1 --- Hydrogeological characteristics --- p.46 / Chapter 3.4.2 --- Surface hydrological characteristics --- p.46 / Chapter 3.5 --- Three major coal mine overviews of the assessment area --- p.48 / Chapter 3.5.1 --- Suhaitu coal mine --- p.48 / Chapter 3.5.2 --- Huangbaici coal --- p.51 / Chapter 3.5.3 --- Wuhushan coal --- p.53 / Chapter 3.6 --- Data available --- p.55 / Chapter 3.6.1 --- Data available for this research --- p.55 / Chapter 3.6.2 --- Collection materials and data for reference --- p.55 / Chapter 4. --- Investigation and Analysis of Risk Factors --- p.57 / Chapter 4.1 --- Currentstatus of Wuda Coalfield --- p.57 / Chapter 4.2 --- Water source --- p.58 / Chapter 4.2.1 --- Rain fall --- p.58 / Chapter 4.3 --- Surface Condition --- p.59 / Chapter 4.3.1 --- Flood ditches and surfacerunoff --- p.59 / Chapter 4.3.2 --- Stripping digging pits --- p.61 / Chapter 4.3.3 --- Slag heap --- p.67 / Chapter 4.3.4 --- Water yield of three main coal mine --- p.71 / Chapter 4.4 --- Water conductors investigation --- p.72 / Chapter 4.4.1 --- Faults --- p.73 / Chapter 4.4.2 --- Fissures investigation --- p.75 / Chapter 4.4.3 --- Investigation and analysis of fissures --- p.81 / Chapter 4.4.4 --- Abandoned tunnel and (illegal) private coal mine --- p.83 / Chapter 4.4.5 --- Subsurface Detection- Geological radar --- p.84 / Chapter 5. --- Methodology and Information acquisition --- p.87 / Chapter 5.1 --- Evaluation Index System --- p.87 / Chapter 5.1.1 --- Methodologies in Establishing the Evaluation Index System --- p.87 / Chapter 5.1.2 --- Principles for Establishing Evaluation Index System --- p.88 / Chapter 5.1.3 --- Method in Establishing Evaluation Index System --- p.89 / Chapter 5.1.4 --- Flow chart --- p.90 / Chapter 5.2 --- Storm Rainfall Design --- p.91 / Chapter 5.3 --- Drainage network and fill sinks extraction --- p.94 / Chapter 5.3.1 --- Surfacerunoff model --- p.94 / Chapter 5.3.2 --- Fill Sinks (peaks) --- p.96 / Chapter 5.3.3 --- Flow Direction --- p.97 / Chapter 5.3.4 --- Flow accumulation --- p.98 / Chapter 5.4 --- Traditional methods of derived Fissures area and depth --- p.101 / Chapter 5.5 --- The method of obtaining coal fire information --- p.103 / Chapter 5.5.1 --- Remote sensing data --- p.105 / Chapter 5.5.2 --- Land use classification --- p.105 / Chapter 5.5.3 --- Temperatureretrieval based on TM/ETM+ --- p.107 / Chapter 5.5.4 --- Results of coal fire retrieval --- p.110 / Chapter 5.6 --- The method of obtaining coal mine subsidence area --- p.113 / Chapter 5.7 --- Illegal private coal mine detecting --- p.115 / Chapter 5.8 --- The Analytic Hierarchy Process (AHP) --- p.118 / Chapter 5.8.1 --- Introduction of AHP --- p.118 / Chapter 5.8.2 --- The procedure of AHP --- p.120 / Chapter 6. --- Evaluation and validation --- p.122 / Chapter 6.1 --- Workflow --- p.122 / Chapter 6.2 --- Develop a decision hierarchy structure --- p.122 / Chapter 6.2.1 --- Choosing evaluation indicator --- p.123 / Chapter 6.3 --- Weights distribution --- p.124 / Chapter 6.3.1 --- Establishment of comparison matrix --- p.125 / Chapter 6.3.2 --- Weight Calculation and Consistency Check --- p.127 / Chapter 6.3.3 --- Global weight calculation and global consistency check --- p.131 / Chapter 6.4 --- Data Preparation and Classification --- p.133 / Chapter 6.4.1 --- Rainfall classification --- p.134 / Chapter 6.4.2 --- Classification of surface condition --- p.135 / Chapter 6.4.3 --- Classification of conductor --- p.138 / Chapter 6.5 --- Result of Factor weight overlay --- p.140 / Chapter 6.4.1. --- Results --- p.140 / Chapter 6.4.2 --- Compare with Risk Map from Shenhua Group --- p.143 / Chapter 6.4.3 --- Fieldwork Validation --- p.145 / Chapter 7. --- Conclusions and suggestions --- p.150 / Chapter 7.1 --- Results and conclusions --- p.150 / Chapter 7.2 --- Eliminate potentialdangerous source --- p.152 / Chapter 7.3 --- Flood prevention measures recommended --- p.153 / Chapter 7.3.1 --- Mainly measures for flood prevention --- p.154 / Chapter 7.3.2 --- General prevention and control of surface water --- p.155 / Chapter 7.3.3 --- Establish mechanisms and systems to prevent coal mine flood --- p.156 / Chapter 7.3.4 --- Strengthen the basic work to prevent coal mine accidents --- p.158 / Chapter 7.3.5 --- Investigation and remediation work to prevent coal mine accidents --- p.159 / Chapter 7.4 --- Future work --- p.160 / References --- p.162
4

Implementing energy release rate calculations into the LaModel program

Sears, Morgan M. January 2009 (has links)
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).
5

Analysis of underground coal mine refuge shelters

Mitchell, Mickey D. January 2008 (has links)
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).
6

Parametric design of a coal mine refuge chamber

Fasouletos, Michael A. January 1900 (has links)
Thesis (M.S.)--West Virginia University, 2007. / Title from document title page. Document formatted into pages; contains vii, 63 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 52-53).
7

Mining Interruption: Life, labor and coal after the Soma mine disaster

Az, Elif Irem January 2023 (has links)
“Mining Interruption” tackles the question of how to make sense of disaster by exploring the Soma mine disaster. On May 13, 2014, an explosion in the Eynez underground lignite coal mine caused a fire that blocked the exit, sealing in 301 mineworkers who died of carbon monoxide poisoning in the town of Soma, in the city of Manisa, in Aegean Turkey. While the European Union was becoming relatively greener next door, coal extraction had begun to increase in Turkey after the Justice and Development Party [Adalet ve Kalkınma Partisi] came to power in early 2000s. The relative decline of coal in the Global North paved the way for increased amounts of internal coal extraction and consumption in the energy geographies of the Global South and other non-Western countries as well as of Indigenous lands. The shift created biopolitically, socially, and technologically renewed forms of exploitation of labor, bodies, and nature, which contextualize the Soma mine disaster. Based on 18 months of ethnographic fieldwork and 68 open-ended interviews conducted in the Soma Coal Basin, this dissertation presents one constellation of the disaster by exploring four figures—The Accidented, the Bride, the Deserving, and the Striker—both as effects and as ongoing temporalities of the disaster. It contributes to critical disaster studies by defining and studying disaster not as a category of event, but as a concept through which multiple temporalities, lived experiences, and knowledges hang together. This loose definition of disaster is complemented by a reinterpretation of Walter Benjamin’s take on one of Bertolt Brecht’s most important dramaturgical techniques: interruption. In the dissertation, interruption is re-conceptualized as an experiential (hence temporal) concept that captures out-of-the-ordinary moments or flashes that interrupt everyday life in a way that permits a reevaluation of historical-material conditions. Interruptions are openings through which people may or may not follow an accidental course of action in order to overcome, better deal with, or politically respond to their conditions. The multiplicity of interruptions that are integral to the ongoing Soma mine disaster intersect with labor, fossil fuel production and its toxic effects, disability/debility, gendered oppression, disaster management, and social assistance. Some of these interruptions are experienced as rupturing events while others are perceived below the threshold of the event as such—as noneventful or not-so-eventful sensibilities, intensities and material changes. Each figure in question is a constellation in itself, a web of interdependencies, ruptures and materialities formed among human beings, state actors, coal, land, tobacco and other plants, limbs, organs, and names. In “The Accidented,” by examining mineworkers’ experiences and the terminology of becoming accidented (a direct translation of the term kazalanmak [in infinitive form]) through work accidents, the dissertation presents a critique both of existing disability assessment techniques and processes, and of understandings of disability as identity, which peripheralize labor-related and other experiences of (dis)ability and debility. In “The Bride,” by surveying the pervasive rumors about the widows of the 301 mineworkers, and their naming by the townspeople as “the brides,” the dissertation studies the differential treatment of the families of the 301 and the rest of the mining community through the state’s twofold disaster management strategy, and the ways in which people deal with this treatment through gossip, resentment, and kinship ties. In so doing, the dissertation also explores how affinal kinship relations have been transformed in the region due to the rise of coal mining, which coincides with the heightened neoliberalization of agriculture. In “The Deserving,” by investigating the materiality and movement of the lignite coal that is known as “Soma coal,” the dissertation articulates the ways in which the lives and desires of working-class and peasant communities have been reshaped through coercion, patronage, ideological interpellation, and the subjectivizing effects of Soma coal. It presents Soma coal as a pedagogical infrastructure that has emerged through the materiality of coal, and the regimes and networks of labor and welfare provision in contemporary Turkey. Finally, through the figure of “The Striker,” the dissertation examines the three-year long compensation struggle and protests of Soma and Ermenek mineworkers (2019–2021) as a set of emergency strikes that interrupted various processes, technologies, social networks, and modes of life that are formally and/or really subsumed within capital. The concept of “emergency strike” is used in order to encapsulate a form of strike that emerges with whatever means available in a given context, and as a collective act of seizing perceived last chances. This discussion builds on a recent wave of theorization concerning forms of unconventional strike that aim to disarticulate mechanisms and processes of real subsumption and/or state sovereignty. The dissertation shows how mineworkers organized against the backdrop of the Soma mine disaster. In doing so, it demonstrates how mineworkers re-exceptionalized their living and working conditions under a state of exception that has become the rule in Turkey since the 2016 coup attempt while it had already become the rule in the Soma Basin after May 13, 2014.
8

Analytical determination of strain energy for the studies of coal mine bumps

Xu, Qiang, January 2009 (has links)
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).
9

Remembering a Workplace Disaster: Different Landscapes—Different Narratives?

Stubbs, Glenn E. 06 April 2015 (has links)
No description available.

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