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

US
Metric

Overview

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.

Hard Rock Miner HRM220

Miner - Typical Machine Length
22.30 ft
6.80 m

Hard Rock Conveyor HRC30

Conveyor System Length - Approximate
328.00 ft
100.00 m

Hard Rock Roof Support HRS1220

Roof Support - Height Extended
84.64 in
2150.00 mm

Power

Total Installed Power - Approximate
938.00 mm H2O
700.00 kg/mm
Miner Haulage Speed
0-6 m/min (0-19.7 ft/min)

Roof Support System

Support Resistance
320.38 psi
2209.00 kN

Miner Machine Weight

Weight - Total
45.20 t
41.00 t

Seam Height

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

Conveyor System

Conveyor Capacity - Approximate
176.00 tonnes/hr
160.00 tonnes/hr

Dimensions (Approximate) - HRM220 Hard Rock Miner

Seam Range
1.3-2.0 m (4.2-6.6 ft)
Typical Machine Length
22.30 ft
6.80 m
Cutting Head Diameter
50.00 in
1270.00 mm
Installed Power Hydraulic System
73.70 mm H2O
55.00 kg/mm
Cutting Units
2
Installed Power per Cutting Unit
177.00 mm H2O
132.00 kg/mm
Installed Power Electrical System
427.60 mm H2O
319.00 kg/mm
Cutting Depth - Up To
3.90 in
100.00 mm
Cutting Drum Speed
60.00 r/min
60.00 r/min
Body Height
47.20 in
1200.00 mm
Machine Weight - Approximate
45.20 t
41.00 t
Operating Voltage
1,000 V; 50 Hz; 3 AC

Dimensions (Approximate) - HRS1220 Hard Rock Roof Support

Height - Closed
41.73 in
1060.00 mm
Height - Extended
84.64 in
2150.00 mm
Canopy Width
62.99 in
1600.00 mm
Main Canopy Length
166.93 in
4240.00 mm
Swivel Canopy Length
59.05 in
1500.00 mm
Base Width
51.18 in
1300.00 mm
DA (Double Acting) Ram Stroke
24.60 in
625.00 mm
Leg Centers Distance - Vertical to Face
1440/1660 mm (56.69 in/65.35 in)
Bearing Surface Base
38.06 ft²
35360.00 cm²
Distance Roof Support Centers
69.29 in
1760.00 mm
Support Resistance (at Height 1600 mm/62.99 in) - Setting Load at 320 bar (4,641 psi)
320.38 psi
2209.00 kN
Support Resistance (at Height 1600 mm/62.99 in) - Yield Load at 415 bar (6,019 psi)
376.95 psi
2599.00 kN
Support Resistance (at Height 1600 mm/62.99 in) - Load at the End of Swivel Canopy
14.50 psi
100.00 kN
Weight
10.25 t
9.30 t

Dimensions (Approximate) - HRC30 Hard Rock Conveyor

Line Pan Length
102.95 in
2615.00 mm
Line Pan Height
11.02 in
280.00 mm
Chain Length - Up To
328.00 ft
100.00 m
Line Pan Width
69.13 in
1756.00 mm
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
2.30 ft/min
0.70 m/s
Capacity per Hour
176.00 t
160.00 t

Roof Support System

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

Conveyor System

Note
100 m (328 ft) conveyor length/varies with rock density.

Dimensions (Approximate) - HRS1220 Hard Rock Roof Support

Canopy Extension Length
59.05 in
1500.00 mm
Features

Rock Straight System

Rock Straight System

Rock Straight System

Rock Straight System

Rock Straight System

Hard Rock Miner HRM220

Hard Rock Miner HRM220

Hard Rock Miner HRM220

Hard Rock Miner HRM220

Hard Rock Miner HRM220

Hard Rock Miner HRM220

Hard Rock Miner HRM220

Hard Rock Roof Support HRS1220

Hard Rock Roof Support HRS1220

Hard Rock Roof Support HRS1220

Hard Rock Roof Support HRS1220

Hard Rock Roof Support HRS1220

Hard Rock Roof Support HRS1220

Hard Rock Roof Support HRS1220

Hard Rock Conveyor HRC30

Hard Rock Conveyor HRC30

Hard Rock Conveyor HRC30

Hard Rock Conveyor HRC30

Hard Rock Conveyor HRC30

Hard Rock Conveyor HRC30

Hard Rock Conveyor HRC30

Cutting Principle and Cutter Head

Cutting Principle and Cutter Head

Cutting Principle and Cutter Head

Cutting Principle and Cutter Head

Cutting Principle and Cutter Head

Cutting Principle and Cutter Head

Health and Safety

Health and Safety

Health and Safety

Health and Safety

Health and Safety

Sales Features

Rock Straight System

Continuous cutting, loading and hauling in hard rock mining

Hard Rock Miner HRM220

Continuous cutting operation in low seam heights

Hard Rock Roof Support HRS1220

Protection against roof falls

Hard Rock Conveyor HRC30

Flat and sturdy to suit low seam heights

Cutting Principle and Cutter Head

Activated undercutting maximizes productivity

Health and Safety

Designed for increased safety and performance