Development of complex deposits of valuable multigrade ores is associated with the difficulty of not only selecting a system of development, but also to establish a relationship between the main parameters of systems and technical and economic indicators in different mining and geological conditions...

Complexity of mining and geological conditions of occurrence and multigrade industrial grades of ores are characteristic features of many ore deposits. Development of such deposits often presents significant difficulties and requires a comprehensive technical and economic analysis to select not only the development system, but also the site or grade of ores of the first stage of mining. The optimum variant of development of deposits and the choice of the site of the first stage is determined by technical and economic calculation taking into account the planned indicators of production of a particular type of mineral raw materials, the peculiarities of mining and geological conditions, the number of ore reserves of each grade, the remoteness of deposits from the main industrial centers and the degree of economic development of the area of the deposit.

The correct choice of the underground development system and its main structural elements is especially important for enterprises developing complex vein forms. At such enterprises, the production process usually ends with the production of concentrates, so an efficient development system should ensure the minimum cost of the final product. In this regard, the choice of development system includes the following stages: selection of effective development systems on mining and technical and technical-economic factors; comparative economic evaluation of selected development systems; industrial research selected development systems and clarification of their basic design elements; technical and economic analysis of systems and recommendation of the most effective options.