EAR-Project: EuropeAid/116986/D/SV/KOS Part II Main Mining Plan for New Sibovc Mine – Technical Planning
First column: The load factor – Expression of the hourly capacity Basis of the calculation is the theoretical capacity level of the single machines which is determined by the construction/mechanical engineering.. This theoretical digging capacity (Vth in lcm/h) is determined from the bucket size (Vbu) and the bucket discharges (nd). In most cases, the manufacturer specifies it as round value and it includes a volume portion of the cell space of the bucket wheel. The theoretical digging capacity (Vth in lcm/h and Vtheo in bcm/h or t/h)
Vth = Vbu x nd x 60 Tab. 6.4-1 Typ
Theoretical Digging Capacity in lcm/h Volume Number Rotation of of Bucket buckets buckets wheel
Vbu lcm
nbu -
Ubu 1 / min
Number of bucket discharges nd 1 / min
Calculated theoretical digging Capacity Vth(calc) lcm/h
Theoretical Capacity according documentation Vth lcm/h
SchRs 650 (E 9M, E10M) SRs 1300.24 (E8B, E9B and E10B) original currently SRs 1300.26 original currently New BWE
0.65
21
5.15
108
4212
4212
0.52
18
128.6
4011
4000
0.52 0.52 0.52 1.3
21 23 23 18 - 21
7.14 /5.857 7.5 5.857 7.5 ca. 4.28
157.5 134.7 172.5 ca. 77
4914 4203 5382 6000
Comparison: SRs 1300.24 Germany
0.63
14
6.5
91
3440
4200 6000
3500
The mineable solid and compact masses are of special practical interest. In order to take this into account the loosening of the excavated material (overburden or coal) inside the digging tool has to be considered. This value mainly depends from the excavated material itself and to a certain extent from the form of the cut (kind of excavation) and the bucket form. For the conditions in Sibovc the following can be applied: Tab. 6.4-2 Type
SchRs 650 (E9M,E10M)
SRs 1300.24
Theoretical Capacity of Excavators in bcm/h resp. t/h Material Theoretical loosening loosening (transport digging in bucket /dumping) Capacity Vth fd fbu lcm/h lcm/bcm lcm/bcm (1.4) Overburden 4212 1.55 (Clay) (1.52-1.55) Coal 1.7 (1.4) Overburden 4000 1.55 Page 97 of 257
Theoretical Capacity Vtheo bcm/h 2700
t/h 2800
2580