If we compare that to the cost of another 12,000 ft of development, it seems like a small bridge to gap for a significant improvement." Mathematically, they could easily justify another 500 ft of development and an additional 500 ft of longwall mining equipment, shields, armored face conveyor
(AFC) and panline.
As the shearer passes by, the roof supports (or shields) are automatically reset and the armored face conveyor
(AFC) is advanced.
It is being equipped with an Eickhoff SL500 electric shearer, 167 Joy two-leg 850 t IFS roof supports and a 1,000 mm 1,400 kW Joy face conveyor
capable of clearing 2,000 t/h of rock.
Machinery such as shearers, continuous miners and face conveyor
belts are also shown, as well as footage of coal blasting.
Daliuta's complete Joy system features a 6LS5 shearer, two-leg 860 t shields and an armoured face conveyor
. It is one of three complete longwall systems purchased from Joy as part of the project for the mines at Daliuta, Huojitu and Bulianta by Shenhua International Trading, Shendong Coal Corp.
The equipment, commissioned in October 2001, is the only high-voltage longwall operating in Russia, and consists of a 6LS shearer, an 870-ton shield, and an armored face conveyor
. Voltage at the face is 3,300 volts, giving added power for the shearer and armored face conveyor
The face conveyor
, stage loader and coal breaker packages are dominated by DBT with six of the above mines using its systems, while Moranbah North, Kenmare and Ulan opted for Joy packages.
American Electric Power Co.'s (AEP) Windsor mine has been successfully soft starting its face conveyor
for over six months, using water drain-type couplings - the first of its kind in the United States.
Initial face conveyor
drives were 200 hp, but were increased through two successive upgrades, ultimately two 300 hp motors were installed.
To match the face conveyor
to the different roof support types, Cat manufactured custom clevis mountings to connect panline to the roof support base.
The display comprises eight two-leg shields and PM 4 electrohydraulic shield control system, the PF 4 face conveyor
panline with an Eickhoff SL 300 shearer, head gate cross frame with AFC drive system CST 45 and the SK 1114 impact roll crusher.
The face conveyor
can usually carry the fallen rock to the feeder-breaker where it is crushed.