Opencast fields mining leads to land disturbance when conducting mining operations and storing of overburden rocks. The timely reclaiming of the disturbed lands according to the legislation requirements is an immediate duty of the subsoil user. The reclamation of the previously mined-out space of quarries refers to an extremely important tasks of the mining enterprise. The use of water management direction in reclamation assumes the use of previously mined-out space of a quarry to create the water reservoir through various methods of rehabilitation. There are presented various ways of designing the coastal zone of the created artificial water reservoirs in the previously mined-out space of the quarries located worldwide, which are used for the recreational purposes. The various profiles of slopes of artificial water reservoirs in a quarry with more low gradients, suitable for swimming and recreation are shown. Designing of a coastal area on the site of a quarry, intended for water reservoirs, depends on the water level position in the created body of water. The water reservoir, as the lake of artificial origin, created on the former quarry site, is shown. The purpose of the article is to substantiate the methodological approaches and engineering solutions concerning reclamation of the mined-out space after the opencast mining for the recreational purposes.

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This article deals with production planning in the context of providing technology at each mining stage with developed and ready-tostoping reserves. In order to address the problem, the ore body is represented by a geological block model. Numerical data is used to represent the attributes of each block, such as mass, density, ore grade, rock type. The mining plan provision with reserve standards on the degree of reconnaissance for production is reduced to the optimization task solution. The main condition for ensuring the planned production productivity of the mine is to provide the minimum necessary developed reserves. In the proposed mathematical model, it is taken into account by one of the objective function’s terminators for solving the set task. As the results of the calculations have shown, such a scheduling ensures approach that there is developed ore’s sufficient amount for at least 6 months at the beginning of each period, which is a clear advantage of the proposed model.

Paper demonstrates the importance of substantiating the reserves volumes ready for mining in extraction units, in accordance with the mine output capacity, averaging mode and reducing the variation in the mined product quality. Rational methods of planning mining operations based on innovative technological solutions to achieve high-quality ore mass uniformity in terms of mineralogical composition are presented. Optimization of mineral extraction scheduling is possible with a comprehensive analysis of the existing situation and determining a well-founded method for mining operations. Averaging the mined ores content by two components requires a change in their volume planned for separate panels. Based on critical analysis and personal analytical research, a new method has been developed for averaging the mineral raw materials content. The method of ore content bottom-hole averaging in underground mining is substantiated, taking into account the output distribution over extraction units and obtaining a uniform quality of the extracted raw materials. The proposed method of averaging the minerals quality differs from the existing ones by the optimal ore volumes distribution in accordance with their content directly in the mined-out faces of the panels during the period of the field exploitation by underground method.

An analysis of the preparedness of reserves in the Kazakhstan quarries has shown that in a real production process, periods of stable mining unit operation alternate with failures when the ore mass is not fully or partially supplied over the estimated time in the targeted amount and quality. To eliminate the production process breakdown and ensure continuity and consistency of the individual mining cycle stages, redundant mining units with developed reserves should be provided. A technique for justifying the prepared ore reserves is proposed considering the variability of the active mining face parameters based on a statistical analysis of data of operating mining enterprises. To determine the dependence of the produced raw material qualitative composition homogeneity on the number of open pitiable mining faces, the actual weekly-daily schedules of the mining operations of several quarries (test pit 1) and (test pit 2) have been used. It is assumed that under the conditions of an operating mining enterprise, some averaging process parameters independent of the number of mining units may be considered constant and determined based on the operation data. Therefore, the solution to the problem of determining the effect of the number of mining units on the ore flow averaging level can be simplified. The dependence of the useful component content on the number of operating mining units has been studied. A regression analysis of statistical data has been performed. Based on empirical dependencies, formulas for simplified calculating the amount of redundant developed reserves considering the required quality of the extracted ore have been obtained.