MINE HYDRAULIC INSULATION BRIDGE Russian patent published in 2003 - IPC

FIELD: underground water development works, water proofing of flooded sections and mine workings, for instance, in coal mines. SUBSTANCE: bridge includes concrete wall contacting enclosing rocks, metal tube with limiting ribs, steel space reinforcement and ring seal. The latter comes in the form of heat-insulation elastic material in the form of U- shaped sections and lateral stiffening ribs. Limiting rib of metal tube with ring seal is positioned in face of bridge on side of attack by aggressive mine water. Area of surface of limiting rib of metal tube with ring seal is equal to area of face surface of bridge. Due to this direct contact of concrete with aggressive mine water is avoided. EFFECT: raised water-proofness of body of bridge thanks to prevention of direct contact between face surface of bridge and aggressive mine water. 5 dwg