Kozponti Banyaszati Fejlesztesi Intezet

Banyaszati Kutato Intezet

Oroszlanyi Szenbanyak

Varpalotai Szenbanyak

Varpalotai Szenbenyak

Zoltan Ilyes

Janos Nemeth

Karoly Bole

Jozsef Bohnert

Kalman Simon

Andras Elekes

Jozsef Korbuly

Jozef Bohnert

Laszlo Branyi

Gyorgy Ignatko

Kalman Nagy

Ferenc Nemeth

Albert Varga

Matyas Martinko

Jeno Varro

Matyas Racz

Istvan Aufsatz

Matvas Martinko

A mine excavator especially for heavy coal beds comprises a base on which the power loader and conveyor are provided and on which the roof support or shield is pivotally mounted. According to the invention, a back member connected to the roof plate and spaced above the base has a downwardly and forwardly swingable door which deposits caved material onto the conveyor at a forward portion of the main base.

Mining equipment, mainly for extraction of heavy beds

A mechanized longwall system for mines is provided which includes face roof supporting units disposed along the longwall and connected to a face support track by hydraulic advancing cylinders, each unit including a floor and roof element, a drift transport track mounted perpendicularly to one end of the face transport track, including two drift supporting units coupled with hydraulic linkages to the face supporting units, a guide system arranged on one of the floor elements of the drift supporting units and guiding a transfer unit in the longitudinal direction of the drift transport track, the arrangement being such that shifting of a drift supporting unit is accompanied by a simultaneous shifting of the face conveyor apparatus.

Mechanized longwall system for mining

The invention concerns an advanceable shield support assembly for longwall mining. The assembly has a pivotable main roof cap housing a retractable and extensible auxiliary roof cap. Normally the main roof cap supports the roof and the auxiliary one is retracted. However, before the assembly is advanced, the auxiliary roof cap is extended to support the roof section between the working face and the front edge of the main roof cap. The movement of the auxiliary roof cap, and the force with which it engages the roof section, are controlled by cooperating guide tracks and track-engaging elements capable of exerting a wedging action.

Mining shield support apparatus

Growing community of inventors

Budapest, Hungary

Zoltan Ilyes