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 

Індекс рубрикатора НБУВ: И332.302

Рубрики:

Відкрита розробка родовищ залізних руд

Шифр НБУВ: Ж16377 Пошук видання у каталогах НБУВ 

Purpose. To develop a methodology for determining the economically feasible distance of construction sand haulage, which is a secondary raw material of ore pits, to highway construction sites in comparison with the delivery of sand from mining enterprises of building materials, taking into account land conservation indicators. Methodology. The research used a set of methods: analytical method - to establish the main technical and economic indicators that affect the cost of delivering sand from the mining enterprises to the road construction site; technical and economic analysis - to determine the influence of the building materials haulage distance on the cost of construction works. Findings. The economically permissible haulage distance for sands form titanium-zirconium mining enterprises to highway construction objects was established in comparison with the involving of sands from deposits of building materials. It has been proven that under the conditions of using the sands of the Motronivskyi MPP, where the main raw material is titanium-zirconium ores, in addition to the economic effect of the mining waste disposal, there is an ecological effect of reducing the dumps and tailings areas. At the same time, the cost of sand rocks during the construction of the road surface will be reduced by 3 to 60 %, depending on the distance to the construction road site. All together, the area of lands saved from being disturbed by new mining operations will reach 3,3 hectares during the construction of a 2,5 km long category I-b road section. Originality. Dependence was established of the sand cost and its delivery to the object of new highway construction on the materials haulage distance when purchasing sand at the enterprise of the main raw material and from the titanium-zirconium deposit, where it is developed as an associated raw material. The dependence of the economic efficiency indicator of the road construction on the increasing distance of sand rocks delivery from the titanium-zirconium deposit was determined, which allows justifying the rational haulage distance according to technical and economic indicators. Practical value. The developed method for determining the effective haulage distance for sand rocks to the construction site allows one to calculate the expediency of involving associated minerals of ore pits during the reconstruction and construction of new highways, as well as to establish the effect of resource conservation due to the reduction in the area of mining facilities during the extraction of ore and building raw materials.

Розглянуто 2 приклади реальних фізичних систем, наближено описаних за допомогою дробової неадитивної статистики Поліхронакоса. Значення двох параметрів статистики пов'язано з властивостями модельованих систем за допомогою віріального розвинення. Для двовимірного фермі-газу з контактними взаємодіями досягнуто точності до третього віріального коефіцієнта. Проаналізовано підхід до моделювання другого віріального коефіцієнта неабелевих еніонів із м'якою серцевиною

Purpose. To determine the efficiency of the cyclic flow technology at the development of non-ore deposits depending on the location of haulage level, mobile crushing and sorting plants with variable productivity of the enterprise. Methodology. The research implemented the following methods: analytical method - to establish the dependence of the required number of dump trucks at the enterprise on the depth of non-ore quarry development at a given annual productivity; simulation modelling - to determine the influence of the mining depth of a non-ore quarry on the haulage distance of mining mass to the surface of the quarry. Findings. The performance indicators of the haulage system for the development of a non-ore quarry using dump trucks and conveyor transport in combination with a mobile crushing complex, as well as a mobile crushing and sorting plant on the haulage level, were determined. It was established that the use of cyclic flow technology with a mobile crushing complex on the haulage level allows reducing the haulage distance by 1,9 times at a quarry depth of 150 m. Originality. The dependence of the dump trucks productivity and their required number on the depth and production capacity of a non-ore quarry when using the haulage mining system was established. It was determined that an increase in the quarry depth from 50 to 150 m will lead to an increase in the number of dump trucks by 2,6 to 3,6 times, depending on the quarry productivity. At the same time, the use of cyclic flow technology with a mobile crushing complex in the quarry allows increasing the productivity of dump trucks by 2,1 times from 94,1 to 197,6 thousand tons/year due to the reduction of the haulage distance of dump trucks from 2525 to 575 m. Practical value. A methodology for determining the impact of the quarry depth on the parameters of the mining haulage complex has been developed when using the technique of cyclic and current action on non-ore raw material quarries, which takes into account the location of the mobile crushing and sorting plant, changes in the depth and annual productivity of the quarry, its area and parameters of the trenches. The indicators of the cyclical-flow mining technology, necessary for the further technical and economic assessment of the proposed solutions, have been established.