Longwall mining is a complex undertaking and to get the most from it, you need equipment tailored for your conditions and priorities. Joy armored face conveyors (AFC) are designed and built for your operation and to work seamlessly with your other longwall equipment. Custom-designed for your operation Designed for challenging environments
The 34mm AFC chain used to be the norm in longwall mines, but now 42mm chain or larger is common. As mines extend their faces and install wider AFC conveyors to increase production, they are running 48mm or 50mm chain, with 52mm and larger mining chains on the horizon. Running chain in these sizes can give you extended life – in ideal ...
Ellton Longwall has completed 100's of AFC and BSL chain Assemblies and Rebuilds over its 18 year history. Completing work for all major coal mining companies in Australia including Glencore, Peabody Energy, Anglo-American, BHP Billiton, and Centennial Coal.
Meticulously designed for efficiency, Longwall Associates stageloaders are built to conserve horsepower consumption while conveying maximum tonnage. Stage Loader features: Fold-down spill plates between crusher and cross frame drive Wraparound races minimize stack-up and reduce noise Complete compatibility set-up Rated in excess of 4,500 TPH
Aug 22, 2013· Table 2—AFC Design Calculation Note: H = headgate, T = tailgate; volume capacity of the AFC is approx. 2,500 tph. The productivity of the longwall with wider faces improves because a higher percentage of time is spent mining, and a reduced amount of time is spent in the wedge cuts at each gate end of the face.
Longwall mining of coal originated in the 1800s as a so-called 'hand-got' mining method (pick and shovel) ... shearer and AFC for the longwall face reported by Cloete to have set a world record of a monthly production of 162,557 tonnes at Sigma Colliery, South Africa, …
Longwall mining systems are capable of producing significant outputs from a single longwall face – 8 million tones per annum or more. When operating correctly the coal is mined in a systematic, relatively continuous and repetitive process which is ideal for strata control and for associated mining operations
Ampcontrol produced the world's first 11kV Armoured Face Conveyor (AFC) longwall mining system for installation in Zone 1 hazardous areas. We supplied a full turnkey electrical solution for the project including engineering, manufacture, installation, testing and underground commissioning support. During the project scoping phase it was ...
The new AFC system marks the 39th delivered to Chinese mines by and its predecessors in the longwall equipment line. The system is designed for longwall top coal caving (LTCC) to mine a coal seam as thick as 8m, and the face length will be 260m.
8.4.2c Longwall Mining. Longwall mining applies to thin, bedded deposits, with uniform thickness and large horizontal extension. Typical deposits are coal seams, potash layers or conglomerates, trona, and gold reefs. …
Other articles where armoured face conveyor is discussed: coal mining: Haulage: …mechanized longwall systems is an armoured face conveyor (AFC). In addition to carrying coal from the face, the AFC serves as the guide for the longwall shearer, which rides on it (see above, Mining methods: Longwall mining).
Longwall Associates head and tail drives are unmatched in engineering prowess. Guaranteed to effectively and efficiently deliver coal to your stageloader while maximizing cutting speed and minimizing horsepower consumption, Longwall Associates head drives incorporate exclusive designs with the reliability you have come to expect from our company.
Developing an 11kV Longwall Electrical System - Ampcontrol. Jun 02, 2015· Since 1992 the standard supply used on longwall faces and AFC's in Australian mines has been 3300 Volts (3.3kV), with 1,100 Volts (1.1kV) only occasionally used up until 2002.
In high-performance longwall mining, the conveyor system must adjust quickly to carry huge loads and respond to load changes. CST drive systems provide intelligent features like no-load motor startup, AFC soft start and synchronized …
LONGWALL MINING Overview. In the method of secondary extraction known as longwall mining a relatively long mining face (typically in the range 100 to 300m but may be longer) is created by driving a roadway at right angles between two roadways that form the sides of the longwall block, with one rib of this new roadway forming the longwall face.
The longwall panel is 1000 ft wide and 10,000 ft long. 2. The coal seam has an average thickness of 6 ft. 3. The coal block to be degassed is 1300 ft by 10,000 ft, assuming that the width of chain pillars is 300 ft. 4. The cost of contract drilling for …
We develop and produce state-of-the-art Armoured Face Conveyors (AFC) for longwall installations of all sizes. Tensionable drive frames allow for the chain tension to be adapted to the prevailing conditions. Chain tension may be …
10. AFC Creep. Definition: The migration of the AFC towards the maingate or tailgate. Causes: Direction of push, gradient, misalignment, poor face management. Frequency: Quite common. Risks to machinery: Mainly operational problems: binding of supports, broken equipment, loss of roof control, inability to cut out at ends. Risks to people: Small.
Download scientific diagram | Longwall shearer, roof supports, and AFC. from publication: Optimising wireless LAN for longwall coal mine automation | A significant development in underground ...
The transmissions offered by NEPEAN Longwall are compiled from world-class manufacturers of transmission components for the underground mining industry. These components combined with NEPEAN Longwall's Slow Run Drives (SRD) for the BSL and AFC make the transmissions comparable to any other leading supplier of longwall equipment in the world.
We provide designing for Australian underground coal services equipped with complete AFC system. We also provide longwall overhaul and spares. Longwall Temporary Support. RUS supplies longwall temporary support props, …
The new tensioner is designed to clamp over the chain – rather than the traditional hook-the-link method – making this bespoke system suitable for both types of AFC chain. "This new testing equipment meets all the criteria," Davey said. In practice, two unique high-tensile steel blocks fit over the chain and are hydraulically driven ...
March 16, 2011 Ampcontrol produced the world's first 11kV Armoured Face Conveyor (AFC) longwall mining system for installation in Zone 1 hazardous areas. We supplied a full turnkey electrical solution for the project including engineering, manufacture, installation, testing and underground commissioning support.
Kotinskaya's current longwall is equipped with two-leg shields, each with a width of 1.75m and support capacity of 725t. With an operating range of 2.2-4.8m, the supports are used in a seam that is typically slightly more than 4m thick. The mine currently produces about 3Mt/y of coal.
The new AFC system marks the 39th delivered to Chinese mines by and its predecessors in the longwall equipment line. The system is designed for longwall top coal caving (LTCC) to mine a coal seam as thick as 8m, and the face length will be 260m. The LTCC mining method enables thick seams to be recovered economically by cutting the ...
How you manage your mining chain can make or break your longwall operation. The 34mm AFC chain used to be the norm in longwall mines, but now 42mm chain or larger is common. As mines extend their faces and install wider AFC conveyors to increase production, they are running 48mm or 50mm chain, with 52mm and larger mining chains on the horizon.
OVERVIEW. Ventilation of a longwall mine and the longwall face is one of the most important aspects of longwall mining.The main functions of ventilation in longwall mining is: Supply of fresh air at tolerable heat and humidity levels for the mine workers to breathe Removal of noxious gasses from the mine […]
The major development, apart from self-advancing supports, allowing high production longwalls to evolve was the "Armoured Face Conveyor or AFC" which was originally developed in Germany and was frequently (less so nowadays) referred to as a "Panzer" conveyor.
In most modern longwall AFC's, only twin in-board configuration is used. ... From the 1998-1999 Joint Coal Board Survey of Australian Longwall Mines, the following information about AFC's has been calculated. Average: Median: …
Longwall mining is an efficient mining method and using the right equipment can make it even more profitable. Joy longwall systems incorporate shearers, roof supports, face conveyors and more into one system that can be tightly orchestrated by advanced electronics — including cutting-edge automation.
