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US 4,217,067 AGranted
Mine roof support assembly
AssigneeGewerkschaft Eisenhutte Westfalia
InventorsGunter Lagodka, Harry Rosenberg, Kunibert Becker, Gerd Dunkel
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AssigneeGewerkschaft Eisenhutte Westfalia
InventorsGunter Lagodka, Harry Rosenberg, Kunibert Becker, Gerd Dunkel
Estimating the term…
The invention relates to a mine roof support assembly for use in winning mineral material from a mineral mining working having a mineral face. The assembly comprises three roof support units positioned side-by-side along the face, and a goaf shield common to the three units. Each of the roof support units has a roof shield supported on a floor sill. The goaf shield is adjustable in height so as to extend from the floor to the roof of the working. Advance means are provided for advancing the roof support units towards the face, and further advance means are provided for advancing the goaf shield to follow up the advance of the roof support units. The further advance means acts between the goaf shield and the roof support units, and is such as to advance the goaf shield by a distance greater than the distance through which the advance means advances the roof support units.
A mine roof support assembly for use in winning mineral material from a mineral mining working having a mineral face, the assembly comprising three roof support units positioned side-by-side along the face, and a goaf shield common to the three roof support units, each of the roof support units having a roof shield supported on a floor sill, the goaf shield being adjustable in height so as to extend from the floor to the roof of the working, advance means being provided for advancing the roof support units towards the face, and further advance means being provided for advancing the goaf shield to follow up the advance of the roof support units, the further advance means acting between the goaf shield and the roof support units and being such as to advance the goaf shield by a distance greater than the distance through which the advance means advances the roof support units.
Dependencies are inferred from the claim text.