M.Phil. (Mechanical Engineering) / The coal mining industry plays a major role in the global economy. Coal is required for the provision of primary energy needs, generation of electricity and production of steel. Hence, there is a high demand of coal worldwide. For the continuous supply of coal, mining equipment should be in good working conditions and the maintenance teams should be highly equipped and motivated to perform their maintenance activities ...

M.Phil. (Engineering Management) / Please refer to full text to view abstract

Ph.D. / This study evaluates the environmental impacts of platinum mining in the Rustenburg region and the development of the region into a sustainable society, post the Johannesburg World Summit on Sustainable Development (WSSD) held in 2002. The region has been the location of intensive mining and metallurgical processing of platinum group minerals and chromium for more than three decades. Many studies have focused on the impacts of individual mines on their immediate environment and the sustainability of their operations. This study takes an holistic approach, looking at environmental changes across a larger area and the evaluation of the implementation of sustainable development principles in the region in the decade following the Johannesburg WSSD summit, using a multi-disciplinary approach. The debate concerning a suitable definition for sustainability within the mining context was followed through a literature review. In a strict sense, there is a paradox - mining is inherently unsustainable because of the finite, non-renewable nature of mineral resources. To resolve this paradox, two concepts of sustainability emerged: weak sustainability, in which economic capital replaces natural capital; and strong sustainability, prevention and minimising any environmental damage. These two concepts of sustainability were examined within the mining context, and the conclusion reached in this study is that the weak sustainability concept is more realistic and useful in the mining industry, since diverse environmental impacts cannot be avoided during mineral extraction. However, this does not mean that the environmental impacts should be neglected; instead they should be minimised. Sustainability is then achieved when the total amount of capital (i.e. both natural and economic) is constant or increases. Medium-resolution satellite data (Landsat and ASTER images) were used to map land cover/use to quantify the changes between 1973 and 2007, over 205 209 hectares of the Rustenburg region. The most important land cover/use change was the conversion of grassland to agricultural lands and mining areas. Changes in mine tailings storage facilities in terms of size and vegetation status were analysed. Landscape metrics (fragmentation index) were used to interpret the statistics derived from the land cover/use change to give an indication of the functioning of the ecosystem. Tailings samples were collected from two tailings storage facilities. Grain size analysis of the tailings samples was conducted to determine the percentage of particles with diameter ≤2.5 μm and ≤10 μm. Chemical analyses of samples were performed to determine elements of major concern because of their enrichment in the tailings and their potential toxicity. An analysis of the weather data acquired from the weather station located within the area was presented in the form of wind roses. Information on particle-size distributions obtained from the tailings samples and local meteorological data were used to carry out a detailed dispersion model of fugitive dust from mine tailings storage facilities.

A microcomputer risk analysis model is developed and used in an exploration - delineation simulation to analyse in particular the effects of geological factors on exploration mining investment alternatives. Analysis of results indicate that geological parameters can have profound effects on such investment alternatives and that the role of the geologist in determining and evaluating the significance of the various geological factors is critical. Simulation examples highlight some of the key geological parameters and show how changes in these parameters influence both the expected mean results and the standard deviations of such means. The risk analysis model provides an ideal means of conveying the importance of the different geoiogical factors on exploration - delineation - mining investment alternatives and may be used as a geological education aid

As managers with direct contact with workers on the floor, line managers are responsible for implementation of the performance appraisal system at Kansanshi Mining plc. Commonly, implementation of performance appraisal is affected by how line managers interact with their subordinates before, during and after an appraisal interview. Notably, no study has been conducted at Kansanshi mine to understand how line managers conduct performance appraisals since their introduction. This qualitative study aims to build an understanding of how line managers at Kansanshi conduct performance appraisal interviews and what enablers and barriers they face in this process. In pursuit of the research aim, line managers from all the ten departments of the mine were considered as eligible for the study. Using stratified random sampling, ten of the 30 line managers from all ten departments across the mine site were selected. A total of fifteen semi-structured, in-depth, face-to-face interviews were conducted with ten line managers to gather data. These individual interviews were conducted on the mine site in the interviewees' offices as well as other convenient places such as the Kansanshi main boardroom. On average, each interview took between 45 to 60 minutes. All these interviews were audio recorded, transcribed and thereafter analyzed using open coding and constant comparison technique to induce themes. Findings of the study show a variety of barriers and enablers of line managers in their conduct of performance appraisal interviews at Kansanshi mine in Zambia. All ten line managers unanimously highlighted that (a) lack of clear job descriptions and set of individual targets as well as (b) lack of adequate refresher training on how to conduct performance appraisals affected how they conducted performance appraisals. Eight of the ten line managers highlighted that (c) perceived subjectivity of the system while seven of the ten highlighted that (d) predominant production focus and priority were barriers to them in how they conducted performance appraisals. On the other hand, ten line managers highlighted that (a) top management commitment to the implementation of a performance appraisal system, seven highlighted that (b) employees' hope for rewards and five line managers highlighted that (c) spring for career development and progression were perceived as enablers in their implementation of performance appraisals. This research is of value as it highlights how the conduct of performance is not only impacted by organizational support and other complementary organizational systems but also how the barriers to the conduct of performance appraisals affect both the appraisee and the appraiser.

All mine dumps are a point source of either physical, chemical or both forms of pollution. Physical pollution includes the physical site coverage of the dump, slumping of parts of the dams and dust that may originate from it (air pollution). Chemical pollution from, or related to the mine dumps include the dominant acid drainage (which contains heavy metals), radioactivity, electromagnetic radiation, noise and chemicals released from the mineral processing stage. In one way or the other, exposure to these pollution forms is detrimental to the human health and his environment. It is this fact that urges the public, government and the responsible mining companies to find ways of monitoring the pollution and stopping it, preferably at the source. Where it can not be stopped, techniques of reducing it, or containing it have been, and are still being developed. Personal protection is the priority. Pollution exposure to the general public is minimised as much as possible. Pollution control techniques that employ less expensive, natural, self-sustaining elements suitable for the environment such as wetlands and vegetation are recommended. The artificial short term and often expensive alternatives are of secondary priority. However, choice of which technique to use is based on the merit of each problem, knowing that chemicals act faster but are effective for a short period as compared to the natural systems. Pollution management is the critical part of the whole process. This involves decision making on courses of action and financial allocation on the part of both the polluter and the monitoring department/agent. The ability to effectively manage pollution programmes is achieved these days with the aid of computers. It is emphasised that pollution control should be handled in an integrated, multi-disciplinary approach manner. This is because pollution is a question of life and death, hence every individual remains accountable to it. Keeping the public and the concerned parties educated, informed and welcoming their concerns on the environmental issues related to the mine dumps generated in a mining venture is essential in the modern days of environmental public awareness, or otherwise face the public lath.

The African continent is endowed with vast natural resources of minerals, such as cobalt, diamonds, gold, bauxite, iron, platinum, silver, uranium and mineral oil. Oil is unequally distributed in the continent, with some countries, such as Cameroon, Chad, Congo Brazzaville, Equatorial Guinea, Gabon and South Africa, being particularly well endowed. These natural resources can help accelerate development on the continent, especially in Gabon and South Africa if used strategically. This dissertation gives an overview of the international instruments, which play a key role in petroleum legislation and development. At the global level, the international legal instruments related to the permanent sovereignty over natural resources (PSNR), such as the 1962 Resolution 1803 (XVII) on Permanent Sovereignty over Natural Resources indicates that States have the rights to exploit freely national resources and wealth, use and dispose their natural resources for the realisation of their economic development in accordance with their national interest. The PSNR must be exercised in line with indigenous peoples’ rights and the respect of rules concerning the expropriation. At the African level, with regard to the right to the State to exploit freely natural resources, the African (Banjul) Charter on Human and Peoples’ Rights of 1981 has similar provisions as the Resolution 1803. The African (Banjul) Charter specifies that no peoples can be deprived of the right to dispose their natural resources. The African Commission on Human and Peoples’ Rights is tasked to interpret the African (Banjul) Charter. The Resolution on Human Rights-Based Approach to Natural Resources and Governance has also indicated principles in relation to the governance of natural resources. At the regional level, the Constitutive Treaty of the Central African Economic and Monetary Community (CAEMC) of 1994 and the Southern African Development Community (SADC) Treaty of 1992 do not provide explicit provisions relative to the PSNR and the management of natural resources. Therefore, it is important to examine if at the national level, the domestic instruments of both States deal with the PSNR.

Mine reclamation is a long-term process but few long-term (> 15 years) assessment studies are carried out. Considerable effort has gone into test-plot experiments to design revegetation programs prior to termination of mine production but little is known from the results of this work of the long-term effect of competitive interactions between seeded species themselves and between seeded and immigrating native species during the progression to a natural vegetation for that site. The present study revisited and repeated benchmark scientific studies carried out at five mine-sites during the period 1973-1978. The mine-sites were Bull River mine, Coal Creek mine, Cumberland No. 4 mine, Pinchi Lake mine and Texada Iron mines. They were in different biogeoclimatic locations and at each mine, sample sites were located on different waste materials. On-site studies carried out during the 1993 field season included substrate observation and sampling, and visual observation of plant species and percent cover. Substrate samples were later analysed in the laboratory for soil nutrients. The graphical presentation of data honours the original data and is an effective way of assessing the development of substrate health and plant succession. Results show that if sufficient attention is paid to improving land-form then over a long period natural regenerative processes can accomplish remarkable results. Moisture deficiency will restrict growth to deep rooting, drought tolerant species and result in slow encroachment. This may require intensive management if erosion is likely. This type of study performed by staff with interdisciplinary training or experience can be used to make economical long-term assessments of site rehabilitation. They would not in any way replace the detailed quantitative monitoring conducted at critical phases early in the decommissioning process. However, as a complement, such studies could provide data for predicting long-term development on newer sites. In addition, they are an ecologically acceptable alternative to assessments of "productivity" on sites where rehabilitation is slow. / Graduate and Postdoctoral Studies / Graduate

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La elaboración del presente plan de investigación tiene como objetivo principal el identificar y el analizar las obligaciones formales y las obligaciones sustanciales a las que se encuentra inmerso un contribuyente minero, además de representar mediante infogramas una orientación al pequeño contribuyente específicamente el pequeño minero y el minero artesanal, respecto a los tributos del Impuesto a la Renta y el Impuesto General a las Ventas por los procesos que debe seguir. / Trabajo de investigación