The Ellisras Basin, with huge coal resources, is fault-bounded along its southern and northern margins and is a graben-type deposit. The study area is situated in the south-western part of the Limpopo Province of the Republic of South Africa and is geologically located in the Ellisras Basin. In this area the basin is influenced by three major fault zones, the Eenzaamheid Fault delineating its southern limit, the Zoetfontein Fault near its northern limit and the Daarby Fault, with a down-throw of approximately 350 m towards the north-east. Sedimentological facies changes also influence the continuity of the coal zones, with deterioration in coal development. The exploration project was a collaboration between two of the large role players in the South African coal mining industry Sasol and Exxaro, for the purpose of identifying whether the coal in the Ellisras Basin could be used for gasification purposes in the Sasol process, and that enough resources exist on the farms on which the two companies have the exploration rights.. The prospecting method used at the Project area, situated 50 kilometer west of the town of Lephalale in the Limpopo Province of South Africa, comprises the drilling of cored exploration boreholes on a random spacing of ± 1 000 m x 1 000 m, together with infill percussion drilling. The use of slimline geophysical methods to log lithologies is a technique which has been used extensively in the mining industry over a number of years. At the Project area the correlation between the measured densities derived from the traditional method of air and water measurement and those derived from Vectar processed derived densities from geophysical logging is better than 95%. As a method of “fingerprinting” the various coal zones and samples it was decided to calculate the distribution of relative densities in the chosen geological intersection. The data was then used to portray geophysically derived relative density cumulative distribution line diagrams (GDCDD) of the various lithotypes on either a sample-by-sample or zone-by-zone basis. Using the classification method proposed, the various coal seams and zones can be correlated to a high degree and discrepancies easily identified. The lateral correlation between lithologies can be accurately described and substantiated, and this would convince a Competent Person that the method proposed is invaluable in classifying coal resources in the coal basins. / Thesis (PhD)--University of Pretoria, 2014. / lk2014 / Geology / PhD / Unrestricted

The purpose of the work is to develop recommendations for the improvement of methods and organization of enterprise logistics support system. The theoretical bases of the procurement activities of industrial enterprises were surveyed in this work; the practice of procurement management on the example of OJSC Sinara Pipe Plant was investigated; shortcomings and weak points in the theoretical, methodological and organizational framework of the logistics support were revealed; recommendations to improve the efficiency of supply by necessary materials and resources for enterprise were developed. Organizational and methodical ways to improve the enterprise logistics support system were proposed:  a way of improving the system of classification of resources on the most significant economic and technical characteristics and classification system for their storage were offered;  the changing of the supply department organizational structure was offered to improve its efficiency: the introduction of a new post of specialist in the nomenclature of used material resources to ensure uniqueness in the naming and classification of resources;  a method of suppliers rating was developed;  the technique of identifying illiquid stocks, reducing their level and to prevent further accumulation was developed. / Цель работы заключается в разработке рекомендаций по совершенствованию методов и организации обеспечения материально-технического снабжения предприятия. В работе раскрыты теоретические основы закупочной деятельности промышленного предприятия; исследована практика организации закупочной деятельности на примере ОАО СинТЗ; выявлены недостатки и проблемные места в теоретических, методических и организационных основах материально-технического обеспечения предприятия; разработаны рекомендации, направленные на повышение эффективности процесса снабжения предприятия необходимыми материалами и ресурсами. Предложены организационные и методические пути совершенствования системы снабжения предприятия:  предложен путь усовершенствования системы классификации ресурсов по наиболее значимым экономическим и техническим классификационным признакам и системы их складирования;  предложено изменение организационной структуры отдела снабжения для повышения эффективности его работы: введение новой должности специалиста по номенклатуре используемых материальных ресурсов с целью обеспечения однозначности в наименовании и классифицировании ресурсов;  разработана методика рейтинговой оценки поставщиков;  предложена методика выявления неликвидных запасов, снижения их уровня и предотвращения их дальнейшего накопления