Mine roof supports
AssigneeGewerkschaft Eisenhutte Westfalia
InventorsKunibert Becker, Rudiger Kirchbrucher, Klaus D. Pohlmann
Life of this patent
Estimating the term…
Abstract
A mine roof support has a goaf shield with a lemniscate guide system linking the shield to floor-engaging skids. A walking-mechanism is disposed in a channel between the floor skids. In order to prevent rubble or goaf material from penetrating into the channel the guides of the lemniscate system have connections which are spaced one above the other and to which one or several screen plates can be removably and replaceably attached with the aid of push-in locking-bars. The screen plates also advantageously serve to keep the floor skids apart by a minimum distance to prevent jamming of the walking mechanism.
Claims12
A mine roof support comprising a floor-engaging structure, a roof-engaging structure, hydraulic props mounted between the floor and roof-engaging structures and a goaf shield connected to the floor-engaging structure with lemniscate guides spaced apart laterally of the support;
- wherein the floor engaging structure takes the form of spaced-apart skids with a walking mechanism therebetween, the skids being relatively displaceable, at least to a limited extent, in both a direction transverse thereto and vertically, and, the guides are provided with connection means for releasably attaching at least one screen plate to screen off the lower region of the goaf zone from the interior of the support, said at least one screen plate also forming a distance piece defining the minimum spacing between the skids.
In a mine roof support comprising a pair of laterally-spaced floor-engaging skids, which are independently relatively displaceable, at least to a limited extent, a roof-engageable structure, a plurality of hydraulic props disposed between the skids and the roof-engageable structure, a goaf shield pivotably connected to the roof-engageable structure and the skids with means including a lemniscate guide system with guide levers connected between the skids and the shield and a walking mechanism located between the skids;
- the improvement comprising screening means composed of overlapping releasable screen plates displaceably suspended from bars which detachably engage as push-in connections with laterally-spaced guide levers of the guide system, said screen plates serving additionally as means for defining the minimum spacing between the skids to prevent jamming.
Dependencies are inferred from the claim text.