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https://www.cdc.gov/niosh/mining/UserFiles/works/pdfs/lsrum.pdf
Longwall Shield Recovery Using Mobile Roof Supports Frank Chase, Research Engineer NIOSH, Pittsburgh Research Laboratory, Pittsburgh, PA . Phyllip Worley, Senior Manager of Engineering Peabody Energy, Wharton, WV. Allen McComas, President Mobile Mining Support, Inc., Peach Creek, WV. ABSTRACT . Longwall mining has gained the reputation as being ...
https://mining.komatsu/underground-mining/longwall-systems
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.
https://www.cdc.gov/niosh/mining/UserFiles/works/pdfs/lsasg.pdf
caving shield-lemniscate assembly has no vertical stiffness and does not contribute significantly to the rated shield capacity. The stiffness of the shield is a function of the stage extensions (all current shields are two-stage designs). In general, the stiffness of the shield reduces as the mining height increases due to the cylinder extension.
https://www.cat.com/en_US/products/new/equipment/underground-longwall.html
Cat® customized systems for longwall mining range from hydraulic roof supports and automated plow systems to shearers, face conveyors and roof support carriers. This site uses and sets "cookies" on your computer to help make this website better by keeping the site reliable and secure, personalizing content and ads, providing social media ...
https://mining.komatsu/product-details/powered-roof-supports
The mine is able to set the halt and warning zone parameters that best suit their operators and cutting sequences. If an operator is detected within the halt headway of an advancing shield, the shield is stopped and set to the roof. Learn more about proximity detection for …
https://www.britannica.com/technology/longwall-shield
Other articles where Longwall shield is discussed: coal mining: Longwall mining: …by mechanized, self-advancing supports called longwall shields, which form a protective steel canopy under which the face conveyor, workers, and shearer operate. In combination with shields and conveyors, longwall shearers or plows create a truly continuous mining system with a huge production capacity. Record ...
https://en.wikipedia.org/wiki/Longwall_mining
Longwall mining is a form of underground coal mining where a long wall of coal is mined in a single slice (typically 0.6–1.0 m (2 ft 0 in–3 ft 3 in) thick). The longwall panel (the block of coal that is being mined) is typically 3–4 km (1.9–2.5 mi) long and 250–400 m (820–1,310 ft) wide.
https://www.cat.com/en_US/products/new/equipment/underground-longwall/roof-supports/18346354.html
The Longwall Top Coal Caving (LTCC) roof support allows mining to a total seam height of more than 10 m (33 ft) by using a longwall shearer to cut the bottom 2.8-3.0 m (9.2-9.8 ft) and then caving the top coal behind the roof supports onto a rear AFC. This type of longwall is in service for example at a mine in the Hunter Valley, Australia.
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