longwall system

longwall system

[′lȯŋ‚wȯl ‚sis·təm]
(mining engineering)
A method of mining in which the faces are advanced from the shaft toward the boundary, and the roof is allowed to cave in behind the miners as work progresses.
References in periodicals archive ?
In related news, Famur will supply a longwall system to ArcelorMittal's Tentekskaya mine in Kazakhstan.
Contract notice: Financial leasing with the delivery of new devices within the longwall system to the low walls for polish mining group sp.
The Cat Rock Straight System, a fully mechanized longwall system comprised of cutting machine HRM220, conveyor HRC30, and roof support HRS1220, enables continuous mining of flat and tabular deposits and reefs of hard rock minerals, the company reported.
for shafts) full pneumatic fill was used for gently inclined coal layers, whereas steeply inclined ones were mined with longwall system, full dry fill and wooden roof support(Piatek and Piatek, 2002).
In the stalls, I was told, coal is hewn away from the sides of the tunnels by a method known as the retracting longwall system.
10) Considered to be more efficient than the room and pillar system, the longwall system increases mine safety by eliminating the need for explosives.
SUEK), recently set a world record for monthly coal production from a single longwall system.
Contract notice: Delivery of a brand-new high-performance longwall system with equipment for the new brzeszcze tauron group sp.
Among the Joy exhibits at MINExpo in October were components of a complete longwall system, consisting of a J750 ranging arm, line pans 1.
The Harvey mine, which officially began production in March 2014, is the third coal mine and contains the fifth longwall system at the Bailey Complex--the largest underground coal complex in North America.
Full production is due to commence in the third quarter of 2001 when installation of its longwall system has been completed.