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Rock Straight System: Hard Rock Longwall Mining System for Low Seam Deposits Specifications
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 mm H2O

Hard Rock Miner HRM220

Miner - Typical Machine Length
22.3 ft

Hard Rock Conveyor HRC30

Conveyor System Length - Approximate
328 ft

Hard Rock Roof Support HRS1220

Roof Support - Height Extended
84.64 in

Power

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

Roof Support System

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

Miner Machine Weight

Weight - Total
45.2 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 tonnes/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
22.3 ft
Cutting Head Diameter
50 in
Installed Power Hydraulic System
73.7 mm H2O
Cutting Units
2
Installed Power per Cutting Unit
177 mm H2O
Installed Power Electrical System
427.6 mm H2O
Cutting Depth - Up To
3.9 in
Cutting Drum Speed
60 r/min
Body Height
47.2 in
Machine Weight - Approximate
45.2 t
Operating Voltage
1,000 V; 50 Hz; 3 AC

Dimensions (Approximate) - HRS1220 Hard Rock Roof Support

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
24.6 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
14.5 psi
Weight
10.25 t
Canopy Extension Length
59.05 in

Dimensions (Approximate) - HRC30 Hard Rock Conveyor

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 t