High performance longwall extraction in large depth

Stagnation of coal prices to a low level on the international coal trading markets reduces profits and pressured the German hardcoal companies to reduce the mining costs by increasing of the face output and at the same time by reducing the numbers of working points. This concentration could be achieved by the insertion of high performance longwall operations. The success of longwall operations is.dependent upon key points like Geology, equipment and the mine layout. This paper discusses the definition of high performance longwall extraction in large depths and introduces the standard parameters of the equipment and the typical coefficients of these longwall operations as well.