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Rock Straight System: Hard Rock Longwall Mining System for Low Seam Deposits
Rock Straight System: Hard Rock Longwall Mining System for Low Seam Deposits
Continue BrowsingThe Cat® Rock Straight System is a fully mechanized longwall system adopted to hard rock conditions for continuous mining of low seam hard rock deposits. The Rock Straight System combines the use of a hard rock shearer (Hard Rock Miner HRM220), a hard rock chain conveyor (Hard Rock Conveyor HRC30) and hydraulic roof support (Hard Rock Roof Support HRS1220). It features the unique adaptation of Caterpillar “Activated Undercutting Technology†and has been specifically designed for the extraction of bedded hard rock deposits (e.g. platinum, copper, gold). The Rock Straight System provides economical cutting in the mining of thin seams and narrow veins, especially when selective mining of ore is required.
- Technical Specs
- Miner – Typical Machine Length
- 22.3 ft
- Conveyor System Length (approximate)
- 328 ft
- Roof Support – Height Extended
- 84.64 in
- Total Installed Power (approximate)
- 938 hp
- Miner Haulage Speed
- 0-6 m/min (0-19.7 ft/min)
- Support Resistance
- 320.38 psi
- Note
- At height of 1600 mm (62.99 in) and setting load at 320 bar (4,641 psi).
- Weight (total)
- 45.2 tons
- Minimum to Maximum Cut
- 1.3 to 2.0 m (4.2 to 6.6 ft)
- Conveyor capacity (approximate)
- 176 tons/hr
- Note
- 100 m (328 ft) conveyor length/varies with rock density.
- Seam Range
- 1.3-2.0 m (4.2-6.6 ft)
- Typical Machine Length
- 22.3 ft
- Cutting Head Diameter
- 50 in
- Installed Power Hydraulic System
- 73.7 hp
- Cutting Units
- 2
- Installed Power per Cutting Unit
- 177 hp
- Installed Power Electrical System
- 427.6 hp
- Cutting Depth (up to)
- 3.9 in
- Cutting Drum Speed
- 60 rpm
- Body Height
- 47.2 in
- Machine Weight (approximate)
- 45.2 tons
- Operating Voltage
- 1,000 V; 50 Hz; 3 AC
- Height Closed
- 41.73 in
- Height Extended
- 84.64 in
- Canopy Width
- 62.99 in
- Main Canopy Length
- 166.93 in
- Swivel Canopy Length
- 59.05 in
- Base Width
- 51.18 in
- DA (double-acting) Ram Stroke
- 24.60 in
- Leg Centers Distance (vertical to face)
- 1440/1660 mm (56.69 in/65.35 in)
- Bearing Surface Base
- 38.061 ft2
- Distance Roof Support Centers
- 69.29 in
- Support Resistance (at height 1600 mm/62.99 in) – Setting Load at 320 bar (4,641 psi)
- 320.38 psi
- Support Resistance (at height 1600 mm/62.99 in) – Yield load at 415 bar (6,019 psi)
- 376.95 psi
- Support Resistance (at height 1600 mm/62.99 in) – Load at the end of swivel canopy
- 14.50 psi
- Weight
- 10.25 tons
- Canopy Extension Length
- 59.05 in
- Line Pan Length
- 102.95 in
- Line Pan Height
- 11.02 in
- Chain Length (up to)
- 328 ft
- Line Pan Width
- 69.13 in
- Apron Plate Spacing
- 4 × 108 mm (4 × 4.25 in)
- Apron Plate Chain Diameter
- 30 mm × 108 mm (1.18 in × 4.25 in)
- Chain Speed
- 2.3 ft/min
- Capacity per Hour
- 176 tons