Purpose. To substantiate a rational schedule for the combined dragline-truck operation taking into consideration a coefficient of mining in the context of the pit. Methodology. Mathematical and graphical modeling was involved while determining a coefficient of mining concentration in the pit as well as feasibility analysis to select a rational procedure scheme for dragline operation. Findings. Recommendations for the selection of rational dragline operation, while truck loading in the context of Motronivsko-Annivskyi pit, have been developed taking into consideration mining concentration degree in the pit. It has been determined that bottom dragline unloading into a truck, located in the central part of bench mining width, as well as the dragline position at 0.5 A distance from the bench crest, is the most efficient plan of action for the conditions. Technological scheme to develop Motronivsko-Annivskyi pit has been proposed. Originality. Dependence of the mining concentration in the pit upon the parameters of development system elements according to different technological schemes has been derived. The dependence helps estimate development cost for overburden rocks using draglines with direct unloading into trucks. Practical value. Technological schemes for the combined dragline dump truck operation have been developed. Their use makes it possible to cut the prime cost of overburden activities. Implementation of the proposed solutions helps cut stripping cost by UAH 79.65 million a year if annual overburden volume is Qrozkryvu - Qstripping = 13.5 million m3/year.
Purpose. The present paper aims to develop methodological principles for the selection of effective parameters of resource-saving technologies while developing water-bearing titanium-zirconium deposits basing on the complex of analytical studies. Methods. The paper applies a complex of research methods: analytical – to analyze and generalize the main differences of the development technology for water-bearing placer deposits and problem statement; technical-economic analysis for identifying the effect of a resource-saving technology on the indices of land use of the open-pit mining and involvement of associate raw materials in the economic activity; forecasting – to determine the influence on complex development of a titanium-zirconium deposit on the operating parameters of the regional nonmetallic raw material open pits. Findings. Effective trends in using the associate raw materials located in the enclosing and overburden rocks of a titanium-zirconium deposit are identified. Key differences between the technologies of associate raw material mining from the overburden rocks and their recovery from the enclosing rocks while mineral mining are defined. Predictive influence of a resource-saving technology of the development of titanium-zirconium deposits on the extraction of building materials from the regional nonmetallic open pits is specified. Volumes of possible associate raw material mining while developing the Motronivskyi GZK open pit during its operation are determined. Originality. New dependences of a land capacity coefficient while mining nonmetallic raw material in the region, prime cost of ore development as well as number of open pits for sand and clay production in the region on the volumes of involved associate raw material of the titanium-zirconium open pits are identified. Practical implications. A structural-logical scheme is elaborated for the selection of a resource-saving technology while operating open pits for the development of titanium-zirconium deposits.
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