Institut za rudarstvo i metalurgiju Bor

Figure 3. Operation diagram of pumps at the open pit “Potrlica”
Table 2. Operation point of pumps at the open pit “Potrlica
Pump Water sump H, m Qunit, l/s Pcs. Qmax, l/s
BP-300-1 PVS 15 420 2 840
(BP-300-1 + VPN 251-3)/r GVS 160 180 4 720
Total maximum inflow into the open
pit of surface and ground water is:
Qv = 57 200 m 3 . Total capacity of pumping
plants is shown in Table 2. For pumping
the maximum inflows, the simultaneous
operation of both pumps is needed at
auxiliary water sump and both pump sections
on the main water sump.
The required pumping time of water from
maximum inflow from the auxiliary water
sump at level +634 K into the main water
sump at level K-level +649 m, and from the
main water sump into the settling tank at level
+754 K m, is 19 and 22 hours successively.
Pumping plants are sized for maximum
water inflows. Electricity consumption
per year is determined by the average
annual amount of water that is pumped -
10 680 000 m 3 .
Number of moto – operation hours of
pump BP-300-1 at the auxiliary water
sump is 7063 h/year. Number of moto -
hours of section operation at the main water
sump is vodosabirniku 16 481 h / year.
Total average consumption of electricity
for water pumping from the open pit
“Potrlica” 10 936 283 kWh / year.
No 1,2010. 101
MINING ENGINEERING