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Uhelná trasa

Družba and Jiří open pits

Modern economic development in the Northwest Bohemia is based on the extraction and processing of brown coal (lignite). In the mid-20th century, dozens of subsurface and open pit mines were operating in the region of Sokolov. The underground mines were systematically closed down and operations were focusing on the surface mining, which peaked in 1983 with the production of 23 million tonnes of coal. The mining operations in the district encompass approximately 50 km2.

The coal pit Jiří from the opposite side

The pits Družba (“Friedshift”) and Jiří (“George”) Pits lies in the Sokolov Basin, which is vertically confined to the north and south by tectonic lines. The basin is filled with Tertiary sediments of fluvial, volcanic and limnic origins. The brown coal was formed in a swamp environment while the basin‘s depth decreased. It has formed in the two layers – the older seam of Josef with origin approximately 25 million years ago and the younger brown coal formations with the seams of Anton and Agnes with age of 22 million years. The seam of Anton, with an average thickness of 24 m, is mined in the open pits and lies approximately 200 m deep and rises towards the basin‘s edge. The seams are covered by grey claystone, which has origin in the deposits at the bottom of a Tertiary lake. The base of the seams, at the mine’s perimeter, contains exposed, coloured volcanic extrusions from Tertiary volcanoes. The unused overburden is deposited on an inner spoil heap in the open pit and on the outer Smolnice spoil heap.

Mobile spreader PVZ 2500: capacity 2,500 m3/h, transport distance from the conveyor belt 72 m

Bucket-wheel excavators UNEX KU 300: Weight 1,240 t, wheel diameter 7.6 m, capacity 1200 m3/h

GPS position

N 50° 12.096', E 12° 42.622'