A project report submitted to the Faculty of Engineering, University, of the Witwatersrand, Johannesburg, in partial fulfilment of the requirements for the degree of Master of Science in Engineering Johannesburg, 1991 / As mining proceeds deeper on Elandsrand Gold Mine scattered mining will no longer be viable due to the excessive stress levels which would occur during mining of the final remnants between raises. Longwall mining with strike stabilizing pillars would eliminate this need for remnant mining. However, since the Ventersdorp contact Reef on Elandsrand has a relatively large number of faults and dykes and highly variable grade, longwall mining would result in a excessive amount of off-reef mining and mining of unpayable reef. / GR 2017

The core question of this thesis is why working time in South African gold mining has been so stable and addresses the significance of this fact. The working or labour time of miners and mineworkers is shown to have been remarkably stable for a century since 1911. By construing the length of the migrant labour contract as a measure of labour time, which systematically lengthens over the same period until it aligns with the annual rhythm of industrial working time, the evidence is provided for the argument that labour time constitutes the hitherto unrecognised foundation for the exploitation of mine labour in the South African gold mines. The phenomena - and importance for value-creation - of both relatively long, stable industrial working hours and the ever-longer migrant labour contracts over a century, are explained in terms of the value labour power creates in the mining labour process, as well as how the sheer expenditure of extended periods of labour time create the necessary skills mining requires. The fortunes of the platinum mining sector largely follow suit. Whereas the revisionist literature focused on the acquisition of a mine labour supply, this thesis argues that the retention of mine labour, by way of extending, intensifying and sustaining labour time in mining production, completes our understanding of its exploitation. It does so by employing a value-theoretic analysis which reveals the genesis of value creation in productive social class-based relationships. It shows how a series of qualitative, socially constructive effects, intra-working class occupational differentiation for example, emanate from the very expenditure of labour time underground when measured as a quantitative amount of labour time. It is argued that the substantive study of labour time has been surprisingly ignored in Marxist theory within which it plays a central role in the labour theory of value. A range of research methodologies have been employed to make this case. An ethnographic participant observation research method was aimed at articulating an agent-sensitive approach. The candidate lived in the hostel compounds and worked underground with mining personnel and has been both subject to the working time regimes on the mines as well as having actively participated, via various forms of research, in dealing with restructuring and changing working time schedules. The thesis goes on to show in close empirical detail, informed by actual experience and adopting a triangulated research methodology, how working time arrangements within which labour time is expended, remains immured in complexity. Why capital and labour, for instance, adopt competing stances regarding the restructuring of working time arrangements is explained. I conclude that workers’ production demands need to be taken seriously when working time is restructured in mining.

Ph. D., Faculty of Arts, University of the Witwatersrand, 1985

No description available.

Thesis (B.S.)--University of Alaska, 1940. / Alaska "Territorial Department of Mines reports" or "TDM reports" are a collection of reports, notes and maps written by Dept. employees working out of several field offices throughout the territory. Series titles and numbers within the collection were retrospectively assigned with the exception of the few written after statehood (1959). Report contains information on the Yukon River Mining Region, Circle Quadrangle. Includes bibliographical references (leaf 80). Also available in electronic format via Internet.

Thesis (M.A.)--University of Alberta, 1963. / Includes bibliographical references (p. [135]-149).

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Hardpans, or cemented layers, form from precipitation and subsequent cementation of secondary minerals in mine tailings and can act as both physical and chemical barriers. During precipitation, metals in the tailings are sequestered, making hardpan a potentially viable method of natural attenuation. At Montague Gold Mines, Nova Scotia, tailings are partially cemented by the iron (Fe) arsenate mineral scorodite (FeAsO4•2H2O). Scorodite is known as a phase that can effectively limit aqueous arsenic (As) concentrations due to its relatively low solubility (<1 ppm, pH 5) and high As content (~30 wt.%). However, scorodite will not lower As concentrations from waters to below the Canadian drinking water guideline (0.010 ppm). To identify current field conditions influencing scorodite precipitation and dissolution and to better understand the mineralogical and chemical relationship between hardpan and tailings, coexisting waters and solids were sampled to provide information on tailings-water interactions. Hardpan cement compositions were found to include Fe arsenate and Fe oxyhydroxide in addition to scorodite. End-member pore water chemistry was identified based on pH and dissolved concentration extremes (e.g. pH 3.78, As(aq) 35.8 ppm) compared to most other samples (avg. pH 6.41, As(aq) 2.07 ppm). These end-member characteristics coincide with the most extensive and dispersed areas of hardpan. Nearly all hardpan is associated with historical arsenopyrite-bearing concentrate which provides a source of acidity and dissolved As+5 and Fe+3 for scorodite precipitation. A proposed model of progressive arsenopyrite oxidation suggests localized As cycling involving scorodite is occurring but is dependent on sulfide persistence. Therefore, permanent As sequestration is not expected. Remediation efforts would have to consider the possibility of scorodite dissolution after complete sulfide consumption or as a consequence of applying certain technologies, such as a cover. Conversely, if scorodite stability were maintained, the hardpan could be considered as a component in remediating the tailings at Montague. / Thesis (Master, Geological Sciences & Geological Engineering) -- Queen's University, 2008-12-22 09:36:08.157

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