Title: Mineral mining installation

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.

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Inventors: Plester, Karl-Heinz (Lunen, DE, US)
Eggenstein, Friedrich (Bergkamen-Oberaden, DE, US)

Application Number: 001652
Filing Date: 1979-01-08
Publication_date: 1980-10-14
Assignee: Gewerkschaft Eisenhutte Westfalia (Lunen, DE)
Primary Class(es): 405/299 405/291
Other Classes:
US Patent Ref:

3949562	Apr, 1976	Blumenthal et al.	405/296.
4028898	Jun, 1977	Blumenthal et al.	405/299.
4045089	Aug, 1977	Hauschopp et al.	405/291.
4073151	Feb, 1978	Harsma	405/301.

Other Refs:
Primary Examiner: Corbin, David H.
Assistant Examiner:
Attorney: Sughrue, Rothwell, Mion, Zinn and Macpeak