DOI: 10.18503/1995-2732-2022-20-2-23-35
Abstract
The relevance of the research. Since the transition from open-pit to underground mining is usually characterized by a significant decrease of mining enterprise efficiency, a very urgent scientific and technical task is to find and justify an underground geotechnology for mining under-pit reserves, which allows minimizing economic damage in the transition period. Objectives. Substantiation of the parameters of underground geotechnology, taking into account geological and mining factors that affect the efficiency of the mining during the transition from open-pit mining in difficult economic conditions and the tightening of environmental safety requirements. Methods. An economic and mathematical modeling tool was used to simulate the process of mining the transitional zone of an ore deposit, to investigate the functioning of individual technological processes and to predict the technical and economic indicators of underground geotechnology. Results.The influence of the level height on the ore extraction indicators was studied for various options for mining systems. In order to improve ore extraction and preserve the surface, a variant of a sub-level open stoping with dry stowing and an ascending order of extraction of under-pit reserves has been developed. The dependences of the influence of the level height in the transition zone, which varies in the range from 40 to 100 m, and the production capacity of the enterprise in the transition period, which varies from 0.8 to 2.4 million tons per year on the main technical and economic indicators of the mining of under-pit reserves are established. Conclusions.It has been determined that the proposed technology, in comparison with the traditional one, is much more efficient in terms of losses, dilution and the cost of ore extraction, despite the worse labor productivity in the main processes of mining. The best technical and economic indicators are achieved with a level height of 40 m and a mine production capacity of 1.6 million tons per year.
Keywords
under-pit reserves, mining system, technical and economic indicators, level height, production capacity, cost of ore mining.
For citation
Antipin Yu.G., Baranovsky K.V., Rozhkov A.A., Nikitin I.V., Solomein Yu.M. Optimization of Underground Geotechnology Parameters for the Mining of Under-Pit Reserves of ore Deposits by the Method of Economic and Mathematical Modeling.Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2022, vol. 20, no. 2, pp. 23–35. https://doi.org/10.18503/1995-2732-2022-20-2-23-35
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