Mineral mining installation
AssigneeGewerkschaft Eisenhutte Westfalia
InventorsKarl-Heinz Plester, Friedrich Eggenstein
Life of this patent
Estimating the term…
Abstract
A mineral mining installation comprises a longwall structure, such as a conveyor or a winning installation, and a roof support assembly constituted by a plurality of roof support units positioned side-by-side. At least some of the roof support units are provided with hydraulic bracing rams for bracing the longwall structure longitudinally. Each bracing ram is pivotally connected between the longwall structure and the floor sill of a respective roof support unit. Each ram is connected to its floor sill by connection means constituted by a bracket slidably mounted on that floor sill for movement towards, and away from, the longwall structure. Means are provided for securing each of the brackets to its floor sill in any one of a plurality of positions.
Claims12
In a mineral mining installation including a longwall structure and a roof support unit, the roof support unit being provided with a substantially horizontal, hydraulic bracing ram disposed at an acute angle to the longwall structure and acting on said structure to brace said structure longitudinally, the bracing ram being pivotally attached to a floor sill of the roof support unit by connection means, the improvement characterized by:
- the connection means comprising a bracket slidably mounted on an end of the floor sill adjacent to said longwall structure for movement towards and away from said structure, and means for securing the bracket to the floor sill in any one of a plurality of positions to enable the angular position of the bracing ram to be maintained substantially constant when the distance between the roof support unit and the longwall structure is changed.
A longwall mineral mining installation comprising a conveyor extending along the longwall face and a roof support assembly positioned on the goaf side of the conveyor, the roof support assembly comprising a plurality of roof support units positioned side-by-side, at least some of the roof support units being provided with substantially horizontal, hydraulic bracing rams disposed at an acute angle to the conveyor and each of which acts between a floor sill of one of said at least some of the roof support units and the conveyor thereby to brace the conveyor longitudinally, wherein each hydraulic bracing ram is pivotally attached to the floor sill of its associated roof support unit by connection means comprising a bracket slidably mounted on the end of said floor sill adjacent to the conveyor for movement towards and away from the conveyor, and wherein means are provided for securing each bracket to its associated floor sill in any one of a plurality of positions to enable the angular position of each bracing ram to be maintained substantially constant when the distance between the roof support units and the conveyor is changed.
Dependencies are inferred from the claim text.