Underground - Longwall

Caterpillar is the global market leader and supplier of complete longwall systems. All over the world, our equipment and systems are meeting the demands of underground mining under the most stringent conditions. Adapted to the mining challenges faced by our customers today, Cat customized systems range from hydraulic roof supports, automated plow systems, shearers, face conveyors and drive systems to automation and roof support carriers.Caterpillar delivers your system of choice, from low to high seam heights, for the longest longwalls and highest production demands.

Armored Face Conveyors

Maximum productivity in the longwall is possible only if the conveyor technology can keep pace with the output of the mining machines. Cat® Armored Face Conveyors (AFCs) keep your production moving – delivering maximum capacity, high drive power, high availability and reliability.We take available space and desired production capacity into account when designing a complete, customized Cat conveyor system for your operation. Whether you want to build a 500-meter (1,640-foot) longwall, or mine different seam heights, Caterpillar supplies a perfect-fit solution – from AFC, to main and tail drives, to chain and entry conveyor systems.

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PF HD

Bottom Plate Thickness
40 mm1.57 in

Profile Height
358 mm14.09 in

Deck Plate Thickness
70 mm2.76 in

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PF3

Bottom Plate Thickness
20 mm0.78 in

Dogbone Breaking Force
2000 kN449618 lb

Top Plate Thickness
30 mm (1.18 in)

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PF4

Bottom Plate Thickness
25 mm0.98 in

Dogbone Breaking Force
3600 kN809312 lb

Top Plate Thickness
40 mm (1.57 in)

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PF5

Bottom Plate Thickness
30 mm1.18 in

Dogbone Breaking Force
4500 kN1011640 lb

Top Plate Thickness
50 mm (1.96 in)

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PF6

Bottom Plate Thickness
30 mm1.18 in

Dogbone Breaking Force
4500 kN1011640 lb

Top Plate Thickness
30 plus 25 mm (1.18 plus 0.98 in)

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PF7

Bottom Plate Thickness
30 mm1.18 in

Dogbone Breaking Force
4500 kN1011640 lb

Top Plate Thickness
30 + 25 mm (1.18 + 0.98 in)

CST Drive Systems

The Drive for Productivity – With constant pressure for greater productivity, improving the performance of longwall systems remains a key goal for mine operators. At Caterpillar, all aspects of longwall operation and machinery are continuously reviewed to find ways to improve productivity and reduce the overall cost of mining. The performance of the face conveyor system is continually improving.

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CST115

Maximum Output Torque for a Short Duration (3 sec.)
1150000 N·m848196 ft-lb

Maximum Input Speed - Motor Speed
1,782 rpm

Weight - Without Oil - In-line Drive System
16400 kg36165 lb

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CST30

Maximum Input Speed - Motor Speed
1,500 rpm @ 50 Hz (1,800 rpm @ 60 Hz)

Weight - Without Oil - In-line Drive System
3900 kg8600 lb

Maximum Output Torque for a Short Duration (3 sec.)
300000 N·m221269 ft-lb

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CST45

Maximum Input Speed - Motor Speed
1,782 rpm

Weight - Without Oil - In-line Drive System
5900 kg13007 lb

Application
Chain type longwall machinery like face conveyors

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CST45 M

Maximum Input Speed - Motor Speed
1,782 rpm

Weight - Without Oil - In-line Drive System
7200 kg15873 lb

Maximum Output Torque for a Short Duration (3 sec.)
450000 N·m331858 ft-lb

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CST45 V

Maximum Input Speed - Motor Speed
1,782 rpm

Weight - Without Oil - In-line Drive System
5900 kg13000 lb

Maximum Output Torque for a Short Duration (3 sec.)
450000 N·m331858 ft-lb

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CST65

Maximum Input Speed - Motor Speed
1,500 rpm @ 50 Hz (1,800 rpm @ 60 Hz)

Weight - Without Oil - In-line Drive System
7300 kg16094 lb

Maximum Output Torque for a Short Duration (3 sec.)
650000 N·m479415 ft-lb

Mining Controls

The Cat family of Programmable Mining Controls (PMC) offers state-of-the-art microcontroller technology and increased computing power allowing a completely new dimension of longwall automation.Cat Mining Controls provide all the functionality needed for enhanced control of drives, roof supports, plow or shearer ―future-oriented automation for maximum longwall productivity.

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MCU2

Interface
Non-intrinsically safe USB interface

Power Supply of the Explosion-Proof Part
110-240V AC

Power Supply of the Intrinsically Safe Part
12V DC, maximum 2A

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PMC-D/PMC-D20

Operating System
µITRON RTOS

Processor
32Bit RISC Microcontroller TX1940CYAF, 32MHz, internal RAM 10Kbytes, ROM 256Kbytes

RAM Memory
4Mbytes CMOS Static RAM, 4Mbytes Flash

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PMC-R

Operating System
µITRON RTOS

Processor
16Bit Microcontroller TMP91CW12AF, 27MHz, internal RAM 4Kbytes, ROM 125Kbytes

RAM Memory
2Mbytes CMOS Static RAM, 4Mbytes Flash

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PMC-V

Operating System
µITRON RTOS

Processor
32Bit RISC Microcontroller TX1940CYAF, 32MHz, internal RAM 10Kbytes, ROM 256Kbytes

RAM Memory
4Mbytes CMOS Static RAM, 4Mbytes Flash

Plows

Plow systems from Caterpillar make the plow the mining system of choice for low and medium seams under 1.8 m (5.9 ft). With features offered only by Caterpillar, our plow systems exceed the production performance of shearers and offer future-oriented solutions for hard-coal mining.

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GH1600

Coal Hardness
Medium to extremely hard coal

Maximum Installed Power
2 × 800 kW (2 × 1,080 hp)

Maximum Cutting Depth
210 mm8.27 in

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GH800

Coal Hardness
Soft - hard coal

Maximum Installed Power
2 × 400 kW (2 × 540 hp)

Maximum Cutting Depth
180 mm7 in

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GH800B

Seam Range
0.8 m-2.0 m (31.5 in-79 in)

Type of Coal
Soft-hard Coal

Coal Hardness
Soft-hard Coal

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RHH800

Coal Hardness
Soft - hard coal

Maximum Installed Power
2 × 400 kW (2 × 536 hp)

Maximum Cutting Depth
190 mm7.48 in

Roof Supports

Steep grades, very thick and very thin seams, unstable roofs and massive sandstone plates, soft ground and geological faults. These varying conditions require a high level of adaptation to specific requirements. Cat® Roof Supports are world-renowned for their reliability under the most extreme conditions. With superior availability and unparalleled quality in design and production, our roof supports set the standard in longwall mining.

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Customized Roof Support Systems

Height - Extended
1100-6100 mm (43.3-240.2 in)

Shield Centers
1500-2050 mm (59-80.7 in)

Shield Density
up to 111 tonne/m2 (12.5 ton/ft2)

Shearers

Highly productive longwalls place the highest demands on quality and reliability of modern shearers. Cat® Shearers are built to meet these requirements.

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EL1000

Typical Machine Length
14 m46.16 ft

Installed Power
1200 kW1897 HP

Haulage System
2 × 85 kW (2 × 115 hp)

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EL2000

Typical Machine Length
13.75 m45.1 ft

Installed Power
1900 kW2548 HP

Haulage System
AC

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EL3000

Typical Machine Length
15.2 m49.9 ft

Installed Power
2295 kW3078 HP

Haulage System
AC

Variable Frequency Drives

The Cat® variable frequency drives for armored face conveyors are designed to deliver variable speed of the armored face conveyor, very accurate load sharing between gearboxes, and better efficiency when operating in weak power networks.

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VFD-A1200/W1200

Rated Power
1200 kW1609 HP

Input Voltage
3300V ± 10%

Maximum Operational Torque
210 %210 %

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VFD-A800/W800

Rated Power
800 kW1072 HP

Input Voltage
3300V ± 10%

Maximum Operational Torque
210 %210 %

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