MINE BARRIER Russian patent published in 2013 - IPC E21D11/00 E21D21/00 

FIELD: mining.

SUBSTANCE: mine barrier comprises a net fixed on a massif with anchors, each threaded rod end protruding from the well of which crosses the net within its cell and is equipped with a washer with a central hole and a nut, pressing the net to the massif surface. The net is made of tapes by means of their welding in nodes of crossing along the entire area of tapes application above each other. Each tape is made from plastic and comprises steel wires extended along the tape. A gasket is arranged between the washer and the net with a central hole, which is made from an elastic material, and its dimensions provide for prevention of net contact with a washer along its perimetre. In the place of net pressing the surface of the massif is polished, and between the net and the surface of the massif there may be an additional gasket arranged from an elastic material and with a central hole for an anchor rod.

EFFECT: increased efficiency of barrier operation and its durability.

5 cl, 6 dwg