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AssigneeGewerschaft Eisenhutte Westfalia
InventorsKunibert Becker, Willy Heyer, Lubomir Plevak, Jurgen Dodt
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The invention relates to an advance mechanism for a roof support assembly constituted by a plurality of roof support units positioned side-by-side along, for example, a longwall face of a mineral mining working. The advance mechanism comprises a pair of hydraulic advance rams and a pair of resilient, generally parallel guide rods. The guide rods are interconnected at one end by means of a head-piece which is attachable to a conveyor extending along the longwall face. The other end of each guide rod is attached to a respective slide piece which is slidably guided on a respective guide rail which is attached to a floor girder of a roof support unit. The hydraulic advance rams are each pivotally attached to one of the slide pieces and to one of said floor girders. The guide rods are provided, adjacent said one end, with outwardly projecting alignment members each of which co-operates with one of said floor girders to align an associated roof support unit during its advance.
An advance mechanism for a roof support assembly constituted by a plurality of roof support units positioned side-by-side along, for example, a longwall face of a mineral mining working, the advance mechanism comprising hydraulic advance ram means and a pair of resilient, generally parallel guide rods, the guide rods being interconnected at one end by means of a head-piece which is attachable to a conveyor extending along the longwall face, the other end of each guide rod being attached to a respective slide piece which is slidably guided on a respective guide rail which is attached to a floor girder of a roof support unit, the hydraulic advance ram means being pivotally attached to the guide rods and to said floor girders, wherein the guide rods are provided, adjacent said one end, with outwardly projecting alignment members each of which co-operates with one of said floor girders to align an associated roof support unit during its advance.
A roof support assembly for use in a longwall face of a mineral mining working, the roof support assembly being constituted by a plurality of roof support units positioned side-by-side and means for advancing the roof support units towards the longwall face, each of the roof support units having at least one floor girder, the advance means being constituted by a plurality of advance mechanisms each of which comprises hydraulic advance ram means and a pair of resilient, generally parallel guide rods, the guide rods being interconnected at one end by means of a head-piece which is attachable to a conveyor extending along the longwall face, the other end of each guide rod being attached to a respective slide piece which is slidably guided on a respective guide rail which is attached to a respective floor girder, the hydraulic advance ram means being pivotally attached to the guide rods and to said floor girders, wherein the guide rods of each advance mechanism are provided, adjacent said one end, with outwardly projecting alignment members each of which co-operates with one of the floor girders associated with that advance mechanism to align the respective roof support unit during its advance.
A roof support assembly for use in a longwall face of a mineral mining working, the roof support assembly being constituted by a plurality of roof support units positioned side-by-side, and means for advancing the roof support units towards the longwall face, each of the roof support units having at least one floor girder, the advance means being constituted by a plurality of external advance mechanisms, each advance mechanism comprising a pair of hydraulic advance rams and a pair of resilient, generally parallel guide rods, the guide rods being interconnected at one end by means of a head-piece which is attachable to a conveyor extending along the longwall face, the other end of each guide rod being attached to a respective slide piece which is slidably guided on a respective guide rail which is attached to a floor girder of a roof support unit, each hydraulic advance ram being pivotally attached to a respective one of the slide pieces and being pivotally attached to the floor girder associated with that slide piece, wherein each advance mechanism is positioned between an adjacent pair of roof support units, the guide rails of that advance mechanism being fastened to the adjacent floor girders of that pair of roof support units.
Dependencies are inferred from the claim text.