From 1980th years of the last century in the world milling combines are widely used to development of fields of solid minerals. Combines gained the greatest distribution on open-cast minings of coal, iron ore, nickel, bauxites, phosphorites, limestone, plaster, kimberlites, salts. Technology of development of fields milling combines in Russia call «layer-by-layer-band», meaning that the combine moves on the career field strips (for example, at the Wirtgen SM 4200 combine width of a strip constitutes 4,2 m), fulfilling the massif layers of the set capacity (capacity or depth of milling of breeds durability on monoaxial compression of 50 MPas the Wirtgen SM 4200 combine makes up to 0,83 m). This technology has many advantages over traditional technology of production as operation of the combine combines in itself the basis production cycle of mining: destruction of the massif, an otboyka, crushing of the beaten-off piece to the necessary size and loading of mineral in the vehicle though the scope of this technology can be limited.

Keywords

Apatite, cold milling machines, complicated structure deposits, open pit mine, quality, losses, dilution, open pit mining, x-ray radiometric sorting.