What this equipment does
Longwall shearers cut coal from the face by traveling along the armored face conveyor. A shearer is specified by installed power, cutting drum diameter, haulage speed, ranging-arm geometry, cutting pick system, and automation package. The machine must match seam height, coal hardness, roof conditions, AFC size, and powered supports. In high-output mines, shearer reliability directly determines face utilization and monthly production.
At a Glance
- Equipment Type
- Longwall coal cutting machine
- Material Handled
- In-situ coal seam
- Capacity Range
- 300–5,000 tph face production
Common Applications
Technical Specifications
| Specification | Value | Unit |
|---|---|---|
| Installed Power | 300–2,500 | kW |
| Cutting Height | 1.2–6.0 | m |
| Haulage Speed | 0–30 | m/min |
| Drum Diameter | 1.0–3.5 | m |
| Control | Manual, remote, or automated horizon control |
Selection Factors
- Seam height and seam undulation
- Coal hardness and pick consumption
- AFC and roof support interface
- Installed power and cooling capacity
- Automation and horizon control level
- Maintenance access at the face
Maintenance and Wear Notes
Shearer maintenance centers on cutting drums, picks, gearboxes, haulage drives, cooling systems, cables, and electronic controls. Pick consumption should be tracked against coal hardness and contamination because abnormal pick wear often indicates incorrect drum setup or unexpected stone bands.