Purpose. Substantiation of effective ways of mining titanium-zirconium ores deposits with high levels of flooding at the exploration Motronivskyi site of Malyshevskyi Deposit. Methodology. The correct definition of hydrogeological parameters on Motronivskyi site by constructing wells in the relief depressions for the establishment of an average filtration coefficient in Miocene aquifer complex with the graphic-analytical method. The digital model of the area of Motronivskyi placers is based on the publicly available software package "VISUAL MODFLOW" considering laboratory and field studies. Substantiation of effective technology of overburden operations and underwater ore extraction, based on the received digital model of the area was carried out using a technical and economic analysis. Findings. The technological scheme of underwater mining of mineral deposits at Motronivskyi deposit allows refusing from the use of wells for pit dewatering. The capital cost of the facility amounts to 10,5 million Euros, according to the bankable feasibility study by "Vattenfall" company. There is also a reduction in the cost of mining Sarmatian sands and spreading it in the basis of internal dump. Instead of loading into trucks and transporting around the quarry at a distance of about 2 km, Sarmatian sand, in the proposed scheme, is pumped to a distance 300 m in the slurry form. Originality. The results of studies to establish the dependency of the average filtration coefficient of the Miocene aquifer on the parameters of the field are promising for the use in underwater mining operations, especially in case when the level of groundwater in the Neogene-Paleogene aquifer remains unchanged. Practical value. Determination of hydrogeological parameters on Motronivskyi deposit and creation of the area digital model allows substantiating the choice of the efficient technology of overburden and mining minerals from previously used schemes with shovel and road trucks and new schemes for mining titanium-zirconium ores with the use of dredgers and hydraulic transport.

Purpose. The economic efficiency definition of cut-off walls in rocks at the flooded Motronivskyi mining site of Malyshevskyi deposit taking into account the environmental aspects of the problem. Methodology. For determination of possible technological solutions to reduce the inflow of groundwater into the pit used, methods of analysis and systematization were used. While selecting the indexes of evaluation to establish the effectiveness of cut-off walls in rocks analytical method was used. Determination of the mining and preparatory work volume for construction of tranches for placing waterproof materials was performed by graphic method. Substantiation of rational application of cut-off walls in rocks at Motronivskyi mining site of Malyshevskyi deposit was made using techno-economic analysis. Findings. Analysis of modern technological solutions aimed at reducing the volume of inflow of groundwater into the pit was conducted. Method for determining an application field for cut-off walls at a flooded mining pit which takes into account the cost of draining the pit and decrease in the environmental damage to the environment is developed. Technical and economic performance of buildings cut-off wall at Motronivskyi pit mining that allows evaluating the technology effectiveness was set. Originality. Dependence of the required economic effect at the construction of cut-off walls in rocks on the inflow of groundwater into the pit for the geological and hydrogeological conditions at mining Motronivskyi pit is determined. Practical value. Methods for determining an application area of cut-off walls at mining flooded pits allows estimating the cost efficiency of using cut-of walls in rocks at mining flooded fields, taking into account mining-geological and hydrogeological conditions of occurrence.

Purpose. Development of the process scheme of mining-hauling operations at the mining flooded deposits. Methodology. The choice of rational haulage equipment performed by using the analytical method of research. The graphic-analytical method of research was used in developing the recommended technological schemes of mining-hauling operations using conveyor haulage. For substantiation of technological schemes parameters of overburden transportation, the method of technical and analytical analysis was used. Findings. The world experience in the mining titanium deposits is summarized and the main benefits of underwater mining at Motronivskyi placer deposit are highlighted. The analysis of traditional methods and equipment for overburden rocks transportation to this pit condition was carried out and a new design of a belt conveyor with a rope and mining technology is proposed. The basic indexes of economic efficiency of the developed technology are defined: decreasing operating costs while reducing transportation distance, the net present value and internal rate of return were estimated. Originality. The obtained research results of determining the impact of changing parameters and equipment in technological mining scheme of Motronivskyi watered alluvial placer deposit using the proposed systems of continuous mining for the overburden remove on the net present value of the project allowed determining the Internal rate of return and payback period. Practical value. Technological solutions for the introduction the connecting conveyor with a rope in the pit field centre in the technological scheme of transporting overburden rocks are justified. The use of floating support on the pontoon allows stabilizing the conveyor belt in a surface part of the deposit. Maintenance of the conveyor elements is significantly simplified and facilitated improving, as a result, work safety and its efficiency.

Зроблено розрахунки термодинаміки системи еніонів з магнітними зарядами в електромагнітному полі. Показано, як внесок у поправку до енергетичного спектра, пов'язаний з магнітними зарядами, впливає на другий віріальний коефіцієнт та магнітну сприйнятливість. Наведено залежності відповідних поправок як функції температури й еніонного параметра.

Зроблено розрахунки термодинаміки системи еніонів з магнітними зарядами в електромагнітному полі. Показано, як внесок у поправку до енергетичного спектра, пов'язаний з магнітними зарядами, впливає на другий віріальний коефіцієнт та магнітну сприйнятливість. Наведено залежності відповідних поправок як функції температури й еніонного параметра.

Індекс рубрикатора НБУВ: И22-4

Рубрики:

Відкрита розробка родовищ твердих корисних копалин

Шифр НБУВ: Ж16377 Пошук видання у каталогах НБУВ 

Шифр НБУВ: Ж16377 Пошук видання у каталогах НБУВ