Gewerkschaft Eisenhutte Westfalia, Gmbh

Klaus Seeberger

Harry Rosenberg

Egon Wojaczek

Helmut Poklekowski

Wolfgang Stradtmann

Gunther Harmsma

To increase the height of operation of a shield type roof support an attachment is fitted to the floor sill or to each of a pair of spaced-apart floor skids. The attachment has side walls with bores for receiving pivot pins used to link the attachment to the floor sill or skid and to guide levers connected to the goaf shield. A transverse body extends between the side walls and defines a socket for forming part of a ball-and-socket joint connecting the attachment to a hydraulic prop. The side walls of the attachment have under surfaces which rest on a support surface of the skid or sill near the working face.

Roof supports

A roof support unit for a walking frame roof support assembly is provided with a two part goaf shield. One the goaf shield parts is connected, by means of a link, to the roof cap of the unit; the other goaf shield part being connected, by means of a link, to the floor sill of the unit; and the two parts being hinged to one another. At least one of the links is such as to permit the roof cap to be retracted by an amount sufficient to permit the advance of the unit while preventing the hinged connection between the two goaf shield parts moving towards the goaf side of the mine working.

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Werne, Germany

Klaus Seeberger