The Polish coal mining company, Lubelski Wegiel Bogdanka, has purchased its fourth complete Cat plough longwall system. The new system is expected to mine an average of 10,000 tpd in the thin seam, which has maximum thickness of 1.7 m. The mine production target for 2015, when the new longwall is fully operational, is 11.5 million tpa.
The company commissioned its first Cat longwall system at the mine near Lublin in eastern Poland in March 2010. All four longwalls centre on the Cat GH1600 plough system, the same model that Bogdanka used to set plough-equipped longwall production records of 25,000 tpd in 2012.
“Coal ploughs are simple, durable machines that achieve high production through a combination of precise control and high installed power, making them the machine of choice in seams lower than 1.8 m,” said Michael Myszkowski, product support manager for Cat plough systems.
The GH1600 plough system with 2 x 800 kW installed power is designed for high productivity even in very hard coal seams. The Bogdanka longwalls work automatically, which means that fewer people are needed on the face to control the plough and to advance the shields during operation.
The new longwall system also includes 180 Cat roof supports for the 318 m face and Cat PMC-R roof support control. Other components are the Cat AFCPF4 face conveyor with PF4 pans and Cat CST drives for the conveyor and plow.
A key to Bogdanka’s success in mining thin seams is incremental ploughing. The new system can cut to a precisely defined depth, set as a function of coal hardness, regardless of seam structure or faults. The cutting depth is electronically preset using accurate stroke sensors and an advanced software algorithm. Horizon control provides precise control of the plow angle, ensuring that the plow does not dig or climb unless required to do so by the seam geology. This allows the system to follow the seam-floor boundary accurately, as well as enabling it to follow undulating seams.
Adapted from press release by Jonathan Rowland
Read the article online at: https://www.worldcoal.com/mining/03042014/cat_receives_longwall_plough_order_for_bogdanka_coal_mine/