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 ?
"We have to look at the entire longwall system as a numeric machine," Becker said.
Contract notice: Financial leasing with the delivery of new devices within the longwall system to the low walls for polish mining group sp.
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).
As it mines across the face, the coal drops onto a face conveyor at the base of the longwall system. The mine roof above the machine is temporarily supported by hydraulically-operated self-advancing roof supports.
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.
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 1.50 and 1.75 metre and a medium seam two-leg roof support.
Full production is due to commence in the third quarter of 2001 when installation of its longwall system has been completed.
Transportation of powered roof support which is part of a longwall system provides the contractor, other equipment will be transported Purchaser.
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.
In related news, Famur will supply a longwall system to ArcelorMittal's Tentekskaya mine in Kazakhstan.
(SUEK), recently set a world record for monthly coal production from a single longwall system. The mine produced 1.57 million metric tons (mt) or 1.72 million tons of raw coal during July.