/object/walzenschraemlader-edw-150-2l

Disk shearer, EDW 150-2L

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Bild
 © Technisches Museum Wien, Photo: Peter Sedlaczek
Collection Area
Energy & Mining
Collection
Mining
Epoch
1970 - 1979
More than 1,000 tonnes of coal in one shift. Full mechanisation was achieved in Austrian coal mining in the 1970s through the use of the disk shearer.

The EDW 150-2L shearer loader exhibited in the exhibition mine of the Technisches Museum Wien (Vienna Technical Museum) was manufactured by the company Gebrüder Eickhoff Maschinenfabrik und Eisengießerei in Bochum, Germany. It was used by the company SAKO (Salzachkohlebergbau) in Upper Austria from 1976 until the start of the 1990s.

The two large cutting rollers are mounted to the top left and lower right of the transmission case with its electrical drive. Using its bits arranged in a screw shape, they loosen the coal from the so-called longwall (coalface) and pull it onto a conveyor belt. Together, the two cutting rollers cover the whole profile of the coalface. This is why such machines are also called full-thickness cutting machines. The roller loader can be controlled either directly at the machine or remotely.

During operation, the roller loader travels back and forth along the longwall, which can be up to several hundred metres in length, and cuts approx. 80 cm of coal using the cutting rollers. The props are hydraulically added behind the roller loader using the powered support assembly. The rock is crushed behind this. This is why this type of coal mining is called longwall mining.

In the Upper Austrian and Styrian mines, several hundred to over one thousand tonnes of coal could be mined each day using the disk shearer and 3 - 4 people. But the prices that can be made on the global brown-coal market mean that profitable mining has not been possible for some time. The last underground mines in Austria were closed during the 1990s.


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