When developing deposits by open pit method, the parameters of the panels are usually determined by the productivity of the quarry, the conditions of occurrence, the equipment used, the technology of excavation and transportation works, the qualitative composition of the mineral, the water content of the deposit and the method of draining it, the depth of frost and other factors ...

The Kingisepp phosphate rock deposit is a horizontal stratum-shaped deposit with an average thickness of 2.5 meters and is characterized by significant water cut (in 1964, the average water inflow was 150 m3/h). Due to the pit's high ore output, the strip of uncovered reserves exceeds 200 meters. During the winter months, the phosphorite bed freezes and its mining is associated with drilling and blasting operations. It is well known that the depth of freezing of rocks depends largely on their moisture content. To reduce the level of groundwater can be carried out by a number of measures using the available at the quarry excavator ...

At development of any deposit numerous variants of development systems are possible according to the order of development of the front of works in the open pit. The final evaluation of variants with the choice of the most economical of them is carried out according to the usual methodology.

The development of calculation methods for rock transfer beyond the contour of the open pit is associated with the design of the development of a group of bauxite deposits and further work on the definition and implementation of rational parameters of mining operations for rock transfer by walking draglines. Usual design calculations are carried out on many cross-sections with drawing of each drift. The labor intensity of this method is high, and the accuracy, depending on the distance between adjacent cross sections, is low, because the number of sections to speed up calculations is limited to.