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US 4,192,632 AGranted
Support systems for mineral mining installations
AssigneeGewerkschaft Eisenhutte Westfalia
InventorsHans E. Von Viebahn, Julius Tengler
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AssigneeGewerkschaft Eisenhutte Westfalia
InventorsHans E. Von Viebahn, Julius Tengler
Estimating the term…
A mineral mining installation has a longwall scraper-chain conveyor with a machine, such as a plough, guided for movement back and forth alongside the conveyor to win mineral from a longwall face. A roof support system which may be arranged at the ends of the longwall working, i.e., at the so-called stable zones, is composed of several units each with hydraulic props protected within cylindrical telescopic casings. Each support unit may be displaceable as a whole to follow the working progress or else each support unit may be constructed with front and rear frame assemblies which are relatively displaceable. Each support unit has at least five narrow elongate roof bars disposed closely side-by-side in parallelism. The roof bars are guided for longitudinal advancement and hydraulic rams serve to advance the roof bars individually or in groups. A similar arrangement may also be employed as the floor structure of each support unit.
A support unit for use in mineral mining, said unit comprising a generally rectangular floor frame structure, hydraulic props carried by the floor frame structure, a generally rectangular roof frame structure supported by the props, a plurality of elongate narrow roof-engaging bars mounted on the roof frame structure, the roof bars being arranged in closely-adjacent side-by-side relationship with each roof bar having a width small in relation to the overall width of the unit, guide means for guiding the roof bars for mutual relative longitudinal displacement in relation to the roof frame structure and hydraulic rams connected between the roof frame structure and the roof bars for selectively displacing the roof bars.
A support unit for use in mineral mining, said unit comprising a forward upstanding generally rectangular frame assembly, a rear upstanding generally rectangular frame assembly, each frame assembly including hydraulic props, a plurality of elongate narrow, roof-engaging bars mounted on both the forward and rear frame assemblies, the roof bars being arranged in closely-adjacent side-by-side relationship with each roof bar having a width small in relation to the overall width of the unit, means for fixing the roof bars to one of the frame assemblies, guide means for guiding the roof bars for displacement in relation to the other of the frame assemblies and hydraulic rams connected between the frame assemblies for selectively displacing the frame assemblies relative to one another.
A support unit for use in mineral mining, said unit comprising a forward upstanding generally rectangular frame assembly, a rear upstanding generally rectangular frame assembly, each frame assembly including hydraulic props, a plurality of elongate narrow roof-engaging bars mounted on both the forward and rear assemblies, the roof bars being arranged in closely-adjacent side-by-side relationship with each roof bar having a width small in relation to the overall width of the unit, means guiding the roof bars for longitudinal displacement in relation to the forward and rear frame assemblies, hydraulic rams for selectively displacing the roof bars, and further hydraulic rams for selectively displacing the frame assemblies relative to one another.
Dependencies are inferred from the claim text.