Известия Томского политехнического университета: Инжиниринг георесурсов (Oct 2020)
EVALUATION OF THE EFFECTIVENESS OF THE CYCLIC-FLOW TECHNOLOGY IN THE MODERN QUARRIES
Abstract
The relevance of the research lies in the fact that the use of cyclic flow technology in rational conditions for it allows you to significantly reduce the cost of transporting rock mass, but it has features and limitations, in particular, a large amount of capital expenditures. Therefore, it is necessary to use methods that ensure reliable calculation of the project's payback and optimization of its technical and economic parameters. Objective: based on the analysis of net present value to determine the areas of economical application of cycle-flow technology complexes in comparison with excavator-automobile complexes. Objects: mining factors of complexes of cyclical-flow technology and excavator-automobile complexes (annual productivity, height of lifting of rock mass, type of transported rock mass, technological features of placement of crushing and conveyor complex in the quarry space). Methods: scientific and techno-economic analysis, graphic. Results. The article provides an overview of the use of modern cyclic-flow technology complexes in Russian quarries; shows the results of calculating the economic effect of the complexes compared with the excavator-automobile complexes by the method developed in mining Institute Ural branch Russian Academy of Sciences. The study determined the payback period of additional investment for Stripping complex of cyclic-flow technology with the spacing side of the pit, taking into account the discounting of costs at different process parameters (lift height of rock mass from 180 to 680 m, the annual capacity of the complexes range from 5 to 30 million MT/year). It shows the change in the difference in net present value for the variants of the cyclic-flow technology-excavator-automobile complexes depending on the mining parameters of the complexes. The area of the most economical application of the cyclic-flow technology with belt conveyors of a standard slope (up to 16°) when the side of the quarry is spread under the crushing and conveyor complex at the cost of transport was established.
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