1. Gradient: if the longwall is on an incline across the face, then gravity will pull the AFC downhill; 2. Snaking of the AFC: the simple action of advancing the AFC from one end to the other induces a "snaking motion". In the area along the "snake" the relay bars are imposing a sideways force on the AFC panline in the direction of the ...
The HBT CST drive is a very cost-effective solution, engineered specifically to deliver total control of the most difficult high inertia loads such as long face conveyor systems (400 m and more), and conveyors with multiple synchronized drives. The CST drive provides efficient transmission of motor power and torque with consistent smooth ...
US coal operators turn to technology to improve productivity by steve fiscor, editor-in-chief Overall U.S. longwall production shrunk in 2019. Collectively, this group of 34 underground coal operations produced more than 162.7 million tons, which was about 5.9 million (3.5%) less than last year. In a year where the U.S. saw total coal production drop …
(Langfang) Mining Equipment Co. has announced the completion of its first full armored face conveyor (AFC) system for longwall mining. The achievement is a "milestone in the facility's evolution as a key mining equipment manufacturing plant for and the region", which had previously only manufactured line pans for AFC ...
Longwall mining is a commonly used mining method in underground coal mines [1], [2].The equipment working on a longwall face (Fig. 1) usually includes a shearer, an armored face conveyor (AFC), and hydraulic supports.Horizon control, in which the cutting horizons of the roof and floor are maintained entirely within the coal seam by …
Our AFC pans are operating successfully over a broad range of low and thick seam applications, carrying shearers up to 120-tonne with 2 x 900 kW cutter motors. The standard NEPEAN Longwall AFC drive arrangement uses our Class 45 size drive-frames designed to accept 855 kW powertrains and 42 mm Solid Profile (forged vertical link) AFC chain.
longwall panel, the shearer, AFC, and roof support system are installed across the longwall face. As shown in Figures 4b and 5, the shearer moves along a rail associated with the AFC, cu 4 ing a 0.8 m-wide slice of coal from the co al seam. The extracted coal is deposited onto the AFC and subsequently transported far away the …
applied sciences. Review. Longwall Mining Automation—The Shearer Positioning Methods between the Longwall Automation Steering Committee and China …
The new AFC system is designed for longwall top coal caving (LTCC) to mine a coal seam as thick as 8 m. Face length will be 260 m. The LTCC mining method enables recovering thick seams ...
The Benefit-Cost Ratio (BCR) of CSIRO's longwall automation technology is estimated to be 60.1. CSIRO's technology has also contributed to improving the working conditions and safety of coal mine employees. The improved accuracy of longwall mining operations reduces the amount of waste rock mined along with the coal, leading to less ...
The longwall will consist of a Joy shearer, Famur shields with controls and an armored face conveyor (AFC) from Longwall Associates with CSTs. "We have been planning for our longwall since breaking ground on the project," Hainer said. "With the departure of Joy and from the roof support market, we then looked at other ...
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. ... The shearer (or plow) rides on the AFC and cuts the coal. The cut coal falls into the AFC, and is transported to the headgate ...
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 …
Longwall Chain Australia is dedicated and committed in supporting the Longwall Coal Industry with: Longwall Conveyor Chain, AFC & BSL Sprockets, Australian agents for JDT. Phone. Head Office +61 2 9618 7664 . Address. NSW | Queensland. Home; About Us; Our Vision; Our Profile; Our Products & Services; News; covid-19;
Joy complete longwall systems represent the ultimate solution for high-production longwall mining. Joy incorporates best-in-breed shearers, roof supports, face conveyors, stageloaders, crushers, and mobile belt tail pieces to deliver a complete longwall system that is in a class of its own. Output productivity of this integrated system simply ...
| April 28, 2015 | 11:51 am. Stageloader and Drives. (Langfang) Mining Equipment Co. recently manufactured its first full armored face conveyor (AFC) …
The Longwall 3D Visualizer is a high-fidelity 3D graphics system which will allow the user to virtually navigate the complete longwall face while the system is in production. ... Each of the longwall shearer, PRS, and AFC control system utilizes the Faceboss control system to manage critical machine functions and interface with various control ...
Longwall mining is a primary method for extracting coal from underground mines. As shown in Figure 1, three kinds of mining equipment used in the longwall face …
On average, Longwall Associates rebuilds 12 AFCs per year. Next year, they are making the second AFC for the Longview mine and two new AFCs for the expansion at Coronado Global's Buchanan mine. "All of mines have a spare AFC, that's standard operating procedure," Heninger said. "Some have more than one spare."
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. There is a high capital cost for ...
Longwall Chain Australia supply AFC and BSL sprockets manufactured by Longwall Associates. Their sprockets are manufactured in the USA and have a proven track record use in Australian mines under harsh conditions. For more information of Longwall Associates sprockets and other equipment contact us, 02 9618 7664.
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 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 …
More U.S. longwall operators embrace automation technology to improve horizon control By Steve Fiscor, Editor-in-Chief America's longwall mines produced 133.1 million tons in 2023, which was down 3.1% from 137.3 million tons in 2022. Much of the decrease can be attributed to the loss of production from two mines that are no longer …
JOY complete Longwall Systems represent the ultimate solution for high production longwall mining. Joy incorporates the best-of-breed shearers, roof supports, face conveyors, ... fitting of the shearer within the AFC and roof support envelope. A wide selection of Joy designed and manufactured down-drives can be fitted to the shearer to …
A new model is being designed (Longwall Associates MCLE 1700) and will be available next year, according to Longwall Associates managing director, Peter van Iersel. This will be the first time a longwall shearer has been fully manufactured in Australia and gives the company the opportunity of offering a total shearer/AFC package.
that's what any AFC manufacturer would like to promise. But we can. Our engineers invented the AFC in the early 1940s. Of the ten most productive mines in the world, ... (3 x 1,341 hp) on a single longwall face conveyor. The latest development is the PowerChain. It is available in sizes 34, 42 and 52. Size 52 is designed to be used with
By Syd S. Peng, Huamin Li, Ying Zhou and Jingyi Cheng More Chinese mines are cutting coal from ultra-thick seams in one conventional pass as an alternative to top-coal caving techniques China is by far the largest coal producer and consumer in the world, producing 3.7 billion metric tons (mt) and consuming 3.99 billion mt in 2012, …
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. Armored face conveyors (1) Longwall ...
