Rock Straight System: Hard Rock Longwall Mining System for Low Seam Deposits

Rock Straight System: Hard Rock Longwall Mining System for Low Seam Deposits

The 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.

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

Hard Rock Miner HRM220

Miner - Typical Machine Length
22.3ft

Hard Rock Conveyor HRC30

Conveyor System Length - Approximate
328ft

Hard Rock Roof Support HRS1220

Roof Support - Height Extended
84.64in

Power

Total Installed Power - Approximate
938HP
Miner Haulage Speed
0-6 m/min (0-19.7 ft/min)

Roof Support System

Support Resistance
320.38psi
Note
At height of 1600 mm (62.99 in) and setting load at 320 bar (4,641 psi).

Miner Machine Weight

Weight - Total
45.2t

Seam Height

Minimum to Maximum Cut
1.3 to 2.0 m (4.2 to 6.6 ft)

Conveyor System

Conveyor Capacity - Approximate
176tonnes/hr
Note
100 m (328 ft) conveyor length/varies with rock density.

Dimensions (Approximate) - HRM220 Hard Rock Miner

Seam Range
1.3-2.0 m (4.2-6.6 ft)
Typical Machine Length
22.3ft
Cutting Head Diameter
50in
Installed Power Hydraulic System
73.7HP
Cutting Units
2
Installed Power per Cutting Unit
177HP
Installed Power Electrical System
427.6HP
Cutting Depth - Up To
3.9in
Cutting Drum Speed
60r/min
Body Height
47.2in
Machine Weight - Approximate
45.2t
Operating Voltage
1,000 V; 50 Hz; 3 AC

Dimensions (Approximate) - HRS1220 Hard Rock Roof Support

Height - Closed
41.73in
Height - Extended
84.64in
Canopy Width
62.99in
Main Canopy Length
166.93in
Swivel Canopy Length
59.05in
Base Width
51.18in
DA (Double Acting) Ram Stroke
24.6in
Leg Centers Distance - Vertical to Face
1440/1660 mm (56.69 in/65.35 in)
Bearing Surface Base
38.061ft²
Distance Roof Support Centers
69.29in
Support Resistance (at Height 1600 mm/62.99 in) - Setting Load at 320 bar (4,641 psi)
320.38psi
Support Resistance (at Height 1600 mm/62.99 in) - Yield Load at 415 bar (6,019 psi)
376.95psi
Support Resistance (at Height 1600 mm/62.99 in) - Load at the End of Swivel Canopy
14.5psi
Weight
10.25t
Canopy Extension Length
59.05in

Dimensions (Approximate) - HRC30 Hard Rock Conveyor

Line Pan Length
102.95in
Line Pan Height
11.02in
Chain Length - Up To
328ft
Line Pan Width
69.13in
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
2.3ft/min
Capacity per Hour
176t

Standard Equipment:

Optional Equipment: