An underground conveyor is inherently more expensive than one designed for overland or surface use. This stems from the need for fire-resistant materials and dust protection. However, the structure can be less complex than that used outside as the passageway floor or roof can provide mounting points.
Here’s a look at these points and others that affect system cost:
- Capacity required: expressed in tons per hour (tph), when combined with a knowledge of material density this determines the width, speed, and strength of the conveyor belt. It’s also the major determinant of motor power requirements.
- Vertical rise: the higher the material needs raising to bring it out of the mine, the greater the load on the motor.
- Material characteristics: density and tph determine the volume of material to be moved, but properties like abrasiveness, sharp edges, and whether wet or dry influence conveyor belt and component selection.
- Structure installation: in mine passageways, structure can be mounted to the floor or roof. Roof mounting frees up space for workers, vehicles, and equipment.
- Belt speed: determines reducer ratio and torque requirement at the drive unit.
- Belt width: a wider belt is always more expensive.
- Distance: this determines belt length and quantity of structure needed.
- Discharge system: When the belt reaches the surface it usually discharges material onto another conveyor. This might be via a rock box or transfer chute.
Credits to West River Conveyors
