Mine roof support

Details Mine roof support Mine roof support

E - Fixed Constructions

21

D

61/67

E21D 17/05 (2006.01) E21D 23/00 (2006.01) E21D 23/08 (2006.01)

Patent

CA 1139118

ABSTRACT OF THE DISCLOSURE Coal in the roof of a seam being mined by the long wall method is recovered by supporting an elongated area of the seam roof using a plurality of three cradle supports, the front two cradles being moved forward stepwise parallel to the long wall to form a passage with canti- levered roof supporting arms of the third cradle. When the third cradle at one end of the passage is moved forward into engagement with the first two cradles, the coal in the roof is left unsupported, and is removed via a conveyor and a loader in the passage.

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