Scraper tare (empty) |
65000 kg |
|
Average load carried |
32 m3 |
|
Density of material, in bank |
1550 kg/ m3 |
|
Load factor I |
0.6 |
|
Distribution of load to driving wheels (% of gross weight) |
59 % |
|
Uphill grade on haul road, loaded |
4 % |
|
Traction coefficient, haul road |
0.55 |
|
Rolling Resistance Factor, loaded |
0.39 kN/t |
|
Average speed, haul |
18 km/hr |
|
Haul distance |
1020 m |
|
Average speed, return empty |
44 km/hr |
|
Return distance (by different route) |
1130 m |
|
Efficiency factor (operator and scraper together) |
41 min/hr |
|
Fixed time is made up of: |
Spot time |
0.6 min |
Load time |
2.7 min |
|
Dump time |
1.4 min |
Using the information above calculate the following:
a) Calculate the gross vehicle weight (GVW) (kg).
b) Calculate maximum tractive force (kN) on road at driving wheels when loaded.
c) Calculate the effective grade % on the haul road.
d) Calculate total resistance (kg or kN) while hauling.
e) Calculate the total cycle time (minutes).
f) Calculate production rate, in Bank m3/hr.
Scraper tare (empty) 65000 kg Average load carried 32 m3 Density of material, in bank...
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