In this paper, a method of mathematical modeling for solving the problem of reusing man-made waste from mining and the processing of ores is proposed. The use of intermediate products (man-made waste: tailings of processing plants, rocks from sinking operations and the technical water of mine drainage) in cyclic production presupposes their use as fill material components and placement in the mined-out voids of underground mines. The influence of mining factors on the fill material composition and the parameters of the created fill mass is justified. The results of a practical implementation of the proposed mathematical model are presented, and an algorithm is compiled. Deformation changes and stress concentration are key criteria in the proposed mathematical model. The proposed algorithm allows for the determination of the preferred system of deposit development, and the selection of its parameters and the fill material composition.

The article substantiates the expediency of applying the foundations of resource saving in the development of innovative technologies for producing of machine billets hot die forging from worn machine components for the subsequent manufacture of them of new parts in the industrial conditions. Particular emphasis is placed on technologies that provide minimal impact to the environment based on the developed methods of metal processing. The optimal combinations of basic parameters of the process of introducing resource-saving technologies in the repair and maintenance operations are proposed. As an example, the article substantiates possibility of carrying out the process of shaping long tubular forgings from extremely worn thick-walled bushings.

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