REINFORCED CONCRETE TUBING FOR FIXING HORIZONTAL MINE WORKINGS OF ELLIPTICAL SECTION Russian patent published in 2022 - IPC E02D29/00 

FIELD: mining.

SUBSTANCE: claimed device relates to mining, namely to the construction of horizontal mine workings of ellipsoidal section under conditions of high rock pressure. Reinforced concrete tubing for fixing horizontal mine workings with an ellipsoidal section is made in the form of a non-linear segment of a concrete body with a thin-walled shell with a reinforcing mesh and flange stiffeners with a reinforcing cage, including a linear longitudinal rod working reinforcement, a non-linear rod working reinforcement and reinforced transverse brackets with a step corresponding to the calculated reinforcement step. Linear longitudinal rod working, non-linear rod working, along the arc of a non-linear section in the form of an ellipse segment, steel reinforcement and reinforced transverse brackets are made with an elliptical cross-section, with the possibility of combining the long axis of the reinforcement ellipse with the maximum loads on reinforced concrete tubing. For linear reinforcement, the maximum moment of resistance along the long axis of the ellipse is aligned with the perpendicular to the flange stiffeners along the radius of the tubing ellipse segment. For reinforced transverse brackets, the maximum moment of resistance along the long axis of the ellipse is set perpendicular to the planes of the flange stiffeners. For non-linear reinforcement, the maximum modulus along the long axis of the ellipse is aligned with the radii of the tubing ellipse segment.

EFFECT: increasing the bearing capacity of reinforced concrete tubing with the bearing surface of an ellipse segment.

1 cl, 6 dwg