Removal / Transportation Of Spoil By Conveyor: The size and location of the conveyor are critical to production and should be sized according to the most critical peaks in excavation.
- There are the following parameters to select...
| Max excavation per hour | 185 m3/hr |
| Assume belt size | 600 mm |
| Assume conveyor trough angle | 20 degrees |
- From the above you read off specific parameters from the suppliers table...
| Recommended belt speed | 150 m/min |
| Angle of repose for dry sand | 35 degrees |
| Angle of surcharge | 20 degrees |
- You must then read off, from the manufacturers tables the conveyor capacity...
| Cross-sectional area of load | 0.02979 m2 |
| At a speed of 150 m/min gives | 268 m3/hr |
- Assume a bulking factor for excavated sane = 15%, and assume 50 minutes work per hour to allow for blockages and maintenance etc...
- 268 x 85% x 50/60 = 190 so therefore capacity of conveyor = 190 m3 per hour = OK.
Hong Kong Airport Express Station conveyor was capable of 11,500 m3/week.