In mining, pusher cars (also known as shuttle cars) are specialized vehicles used primarily in underground coal mining to transport mined material (coal or ore) from the continuous miner to the conveyor belt or other haulage systems. Here’s a breakdown of their role and key features:
Functions of Pusher/Shuttle Cars in Mining:
1. Material Transport:
– They carry loose coal/ore from the mining face (where the continuous miner operates) to a transfer point (e.g., a conveyor belt or feeder breaker).
– Designed for short-distance hauling in confined spaces.
2. Flexibility:
– Unlike fixed conveyors, shuttle cars can maneuver around the mine, adapting to changing mining faces.
– Often operate in tandem with continuous miners in room-and-pillar mining.
3. Loading/Unloading:
– Loaded via a continuous miner’s loading head or scoop.
– Unloaded by dumping material onto a conveyor or into a crusher (often using a rear-dump or rotary mechanism).
4. Battery/Electric-Powered:
– Most modern shuttle cars are electric (battery-powered or trolley-wire systems) to reduce emissions underground.
.jpg)
Key Features:
– Compact Design: Fits low-ceiling mines (e.g., coal seams).
– High Capacity: Typically 5–20 tons per load, depending on the model.
– Durability: Reinforced frames to withstand rough mining conditions.
– Automation: Some newer models include automated guidance systems.
.jpg)
Alternatives:
– In larger mines, shuttle cars may be replaced by continuous haulage systems (e.g., flexible conveyors) or battery-powered haul trucks for efficiency.
Safety Considerations:
– Equipped with dust suppression systems to mitigate coal dust explosions.
– Regular maintenance is critical due to harsh operating conditions.
Would you like details on specific brands (e.g., Joy Global, Caterpillar) or comparisons with other haulage methods?