DOWNHOLE CONDITIONS INFLUENCE THE PERFORMANCE OF THE HYDRAULIC UNIT IN THE EXTRACTION OF IRON ORE
The article discusses the impact of the changing layer depth on productivity of the hydromining plant (HMP), working with the drilling pump of average power of NBT-600. Working body of the hydromining plant is the drilling bit of cutting type with hydraulic monitor drive, working in the flooded area with the changing hydrostatic pressure, depending on a depth of a mining layer. It is shown that with change of depth of a from 560 m to 750 m productivity of HMP decreases by 12 %, and the volume of the ore extracted for a full cycle of operation of the unit lower more than by 2,5 times. The material presented in article allows to set the task of further improvement of HMP.