336 Excavator

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.

Image Model Top Plate Thickness Bottom Plate Thickness Dogbone Breaking Force
Face Conveyor - PF3 30 mm (1.18 in) 0.78 in 449618 lb Details
 
Face Conveyor - PF4 40 mm (1.57 in) 0.98 in 809312 lb Details
 
Face Conveyor - PF5 50 mm (1.96 in) 1.18 in 1011640 lb Details
 
Face Conveyor - PF6 30 plus 25 mm (1.18 plus 0.98 in) 1.18 in 1011640 lb Details
 
PF7 Face Conveyor 30 + 25 mm (1.18 + 0.98 in) 1.18 in 1011640 lb Details
 

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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.

Image Model Maximum Output Torque for a Short Duration (3 sec.) Maximum Input Speed (motor speed) Weight (without oil) – In-line Drive System
CST115 Gearbox 848196 ft-lb 1,782 rpm 36165 lb Details
 
CST30 Gearbox 221269 ft-lb 1,500 rpm @ 50 Hz (1,800 rpm @ 60 Hz) 8600 lb Details
 
CST45 Gearbox 331858 ft-lb 1,782 rpm 13007 lb Details
 
CST45 M Gearbox 331858 ft-lb 1,782 rpm 15873 lb Details
 
CST45 V Gearbox 331858 ft-lb 1,782 rpm 13000 lb Details
 
CST65 Gearbox 479415 ft-lb 1,500 rpm @ 50 Hz (1,800 rpm @ 60 Hz) 16094 lb Details
 

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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.

Image Model Operating System Processor RAM Memory
MCU2 Main Control Unit Windows 7 Intel Core i7, 2.1 GHz 4 GB Details
 
PMC-D/PMC-D20 Drive Control Unit µITRON RTOS 32Bit RISC Microcontroller TX1940CYAF, 32MHz, internal RAM 10Kbytes, ROM 256Kbytes 4Mbytes CMOS Static RAM, 4Mbytes Flash Details
 
PMC-R Roof Support Control µITRON RTOS 16Bit Microcontroller TMP91CW12AF, 27MHz, internal RAM 4Kbytes, ROM 125Kbytes 2Mbytes CMOS Static RAM, 4Mbytes Flash Details
 
PMC-V Human Machine Interface for PMC-D Drive Control Systems µITRON RTOS 32Bit RISC Microcontroller TX1940CYAF, 32MHz, internal RAM 10Kbytes, ROM 256Kbytes 4Mbytes CMOS Static RAM, 4Mbytes Flash Details
 

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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.

Image Model Coal Hardness Maximum Installed Power Mining Height
GH1600 Automated Plow System Medium to extremely hard coal 2 × 800 kW (2 × 1,080 hp) 1.1 m-2.3 m (43 in-90 in) Details
 
GH800 - Plow System Soft - hard coal 2 × 400 kW (2 × 540 hp) Details
 
GH800B Automated Plow System Soft-hard Coal 2 × 400 kW (2 × 536 hp) 0.8 m-2.0 m (31.5 in-79 in) Details
 
RHH800 - Plow System Soft - hard coal 2 × 400 kW (2 × 536 hp) Details
 

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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.

Image Model Height (Extended) Shield Centers Shield Density
Customized Roof Support Systems 1100-6100 mm (43.3-240.2 in) 1500-2050 mm (59-80.7 in) up to 111 tonne/m2 (12.5 ton/ft2) Details
 

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Shearers

At the forefront of every high-performance longwall is a mining machine that works reliably and meets production requirements. Cat® Shearers are built to meet those requirements.

Image Model Typical Machine Length Installed Power Haulage System
EL1000 Longwall Shearer 44.7 ft 1916 hp AC inverter drive Details
 
EL2000 Longwall Shearer 45.1 ft 2548 hp AC Details
 
EL3000 Longwall Shearer 49.9 ft 3078 hp AC Details
 

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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.

Image Model Rated Power Input Voltage Maximum Operational Torque
VFD-A1200/W1200 Variable Frequency Drive for Face Conveyor Systems 1609 hp 3300V ± 10% 210 % Details
 
VFD-A800/W800 Variable Frequency Drive for Face Conveyor Systems 1072 hp 3300V ± 10% 210 % Details
 

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