EXPANSION ANCHOR 2 ШК Russian patent published in 2009 - IPC E21D21/00 

FIELD: mining engineering.

SUBSTANCE: invention relates to mineral resource industry, to facilities for fixation of top and wall of mine working at it passing. Anchor consists in rod, on which there are two or more expansion units, fixed in different layers of geological material. Particular kind of unit corresponds laminate part of anchor bar, on which from two sides are put on metallic block components (dowels). Dowels are connected to each other by wire, of diametre 2 mm. After fixation of anchors in borehole, on its free end, up to touch with mine roof is put on damping component, which is compactly tightened by nut by thread.

EFFECT: increasing of excavation fastening durability and load-carrying ability of anchor.

3 dwg