[en] Five decades of mining and processing of uranium ore until the beginning of the nineties left abandoned mines, radioactive mining waste and mill tailings in Tajikistan. These remains are a radiological threat to humans and the environment which can hardly be quantified at present. First exploratory measurements indicate that the focus of a regular monitoring should be on the former mining sites Taboshar and Adrasman and the mill tailing in Degmay. An intended cooperation of Forschungszentrum Juelich and Tajik partners should produce the necessary radioecological data and further enhance the scientific capacity in Tajikistan. (orig.)

[en] This paper analyses San Juan Province - Argentina prevailing environmental legislation for mining activity and gravel mines. The study focuses the subject from a mining engineering point of view. (author)

[en] Mine layouts, new machines and techniques, research into problem areas of ground control and so on, are highlighted in this report on extending mine life. The main resources taken into account are coal mining, uranium mining, molybdenum and gold mining

[en] The French Society Miniere et Metallurgique de Panarroya mining railway, 241 km long, was the second largest private narrow gauge railway in Spain. Located in the inland. linked the coal and galena mines with foundries and also with the national railroads grid, to transport the minerals to national and foreign markets. (Author)

No abstract available

[en] The influence of two principally different complexes of uranium mining technologies - traditional mining (underground and open-pit) and underground leaching (from permeable and hard rocks) - on the environment was investigated. The degree of contamination of the ecosystems and its influence on human health were estimated in specific examples. (author)

[en] The working life of an uranium mine is long, usually a few tens years: exploration is the first stage, at the end of it, profitability and the environmental impact are assessed. The second stage is mining operations, there are 3 types of mines: open pit mines, underground mines and in-situ recovery mines. The in-situ recovery technology is used for low-grade deposits. A lixiviation solution (diluted sulfuric acid) is injected and made circulating through drills in the deposit. Uranium is dissolved by the sulfuric acid and sucked out with the lixiviation solution. The lixiviation solution is then processed on resin and the uranium is recovered. There are several advantages from the in-situ technology: less perturbation on the mine surface, far less mine wastes and less investment. At the end of their working lives, mining sites have to be dismantled and remedial actions have to be undertaken according to environmental legislations in force in the country. (A.C.)

[en] The requirements of the law which must be met in order to create title to an unpatented mining claim and the procedures which should be followed when an attempt is made to determine the title to the claim is acceptable are reviewed

[en] This paper provides an analysis of financial viability, planning and design for the new coal open pit exploitation for La Margarita mine, with coal-resources estimated on 440.139,7 ton. Dimension, design and economic evaluation were possible by three exploitation methods: (multiple bench, open cast contour, and terraces). Net present values (NVP) were calculated: $c 817,5; $c 518,5 and $c 645,2 respectively for each method (given in million current Colombian pesos $. $c 2380 are equivalent to $us 1) and rate of return (ROR) 78,33%; 34,0% and 38,62% respectively for each method. These indicators served as a parameter to choose the multiple bench method, which should be recalculated because it was necessary to work jointly with two pits and making feasible the project. in addition a general environmental evaluation was done, which is vital for the exploitation. Important impacts on the flower, animals, air, water were found, and measures of control, prevention and mitigation were stated. it is expected that this paper can be useful as a technical-economical support for the development of the open pit exploitation in the margarita mine

[en] In Estonia oil shale is produced by underground and surface mining. The technologies used exert a substantially different effect on the topography and water regime. The cavities generated by subsurface mining may lead to a series of deformations that travel to the land surface and hamper further use of mined-out areas. Based on mathematical calculations, prognostication of ground subsidence in dependence of pillar sizes is attempted (author)