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Rock Straight System

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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.

Conveyor System

Units:
Conveyor Capacity - Approximate 176.0 tonnes/hr 160.0 tonnes/hr Less
Note 100 m (328 ft) conveyor length/varies with rock density. 100 m (328 ft) conveyor length/varies with rock density. Less

Dimensions (Approximate) - HRC30 Hard Rock Conveyor

Apron Plate Chain Diameter 30 mm × 108 mm (1.18 in × 4.25 in) 30 mm × 108 mm (1.18 in × 4.25 in) Less
Apron Plate Spacing 4 × 108 mm (4 × 4.25 in) 4 × 108 mm (4 × 4.25 in) Less
Capacity per Hour 176.0 t 160.0 t Less
Chain Length - Up To 328.0 ft 100.0 m Less
Chain Speed 2.3 ft/min 0.7 m/s Less
Line Pan Height 11.02 in 280.0 mm Less
Line Pan Length 102.95 in 2615.0 mm Less
Line Pan Width 69.13 in 1756.0 mm Less

Dimensions (Approximate) - HRM220 Hard Rock Miner

Body Height 47.2 in 1200.0 mm Less
Cutting Depth - Up To 3.9 in 100.0 mm Less
Cutting Drum Speed 60.0 r/min 60.0 r/min Less
Cutting Head Diameter 50.0 in 1270.0 mm Less
Cutting Units 2 2 Less
Installed Power Electrical System 427.6 mm H2O 319.0 kg/mm Less
Installed Power Hydraulic System 73.7 mm H2O 55.0 kg/mm Less
Installed Power per Cutting Unit 177.0 mm H2O 132.0 kg/mm Less
Machine Weight - Approximate 45.2 t 41.0 t Less
Operating Voltage 1,000 V; 50 Hz; 3 AC 1,000 V; 50 Hz; 3 AC Less
Seam Range 1.3-2.0 m (4.2-6.6 ft) 1.3-2.0 m (4.2-6.6 ft) Less
Typical Machine Length 22.3 ft 6.8 m Less

Dimensions (Approximate) - HRS1220 Hard Rock Roof Support

Base Width 51.18 in 1300.0 mm Less
Bearing Surface Base 38.061 ft² 35360.0 cm² Less
Canopy Extension Length 59.05 in 1500.0 mm Less
Canopy Width 62.99 in 1600.0 mm Less
DA (Double Acting) Ram Stroke 24.6 in 625.0 mm Less
Distance Roof Support Centers 69.29 in 1760.0 mm Less
Height - Closed 41.73 in 1060.0 mm Less
Height - Extended 84.64 in 2150.0 mm Less
Leg Centers Distance - Vertical to Face 1440/1660 mm (56.69 in/65.35 in) 1440/1660 mm (56.69 in/65.35 in) Less
Main Canopy Length 166.93 in 4240.0 mm Less
Support Resistance (at Height 1600 mm/62.99 in) - Load at the End of Swivel Canopy 14.5 psi 100.0 kN Less
Support Resistance (at Height 1600 mm/62.99 in) - Setting Load at 320 bar (4,641 psi) 320.38 psi 2209.0 kN Less
Support Resistance (at Height 1600 mm/62.99 in) - Yield Load at 415 bar (6,019 psi) 376.95 psi 2599.0 kN Less
Swivel Canopy Length 59.05 in 1500.0 mm Less
Weight 10.25 t 9.3 t Less

Hard Rock Conveyor HRC30

Conveyor System Length - Approximate 328.0 ft 100.0 m Less

Hard Rock Miner HRM220

Miner - Typical Machine Length 22.3 ft 6.8 m Less

Hard Rock Roof Support HRS1220

Roof Support - Height Extended 84.64 in 2150.0 mm Less

Miner Machine Weight

Weight - Total 45.2 t 41.0 t Less

Power

Miner Haulage Speed 0-6 m/min (0-19.7 ft/min) 0-6 m/min (0-19.7 ft/min) Less
Total Installed Power - Approximate 938.0 mm H2O 700.0 kg/mm Less

Roof Support System

Note At height of 1600 mm (62.99 in) and setting load at 320 bar (4,641 psi). At height of 1600 mm (62.99 in) and setting load at 320 bar (4,641 psi). Less
Support Resistance 320.38 psi 2209.0 kN Less

Seam Height

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

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

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