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

FIELD: mining.

SUBSTANCE: claimed device relates to mining, namely the construction of horizontal mine workings of circular cross section under high rock pressure. Reinforced concrete tubing for fastening horizontal mine workings of circular cross 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, a non-linear rod working along the arc of a non-linear section in the form of a segment circle reinforcement and reinforced transverse brackets with a step corresponding to the calculated reinforcement step. Linear longitudinal rod working, non-linear rod working along an arc of a non-linear section in the form of a segment of a circle, steel reinforcement and reinforced transverse brackets are made with an ellipsoidal cross-section, with the possibility of combining the long axis of the reinforcement ellipse with 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 circumference of the tubing cylinder 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 radius of the tubing cylinder segment.

EFFECT: increasing the bearing capacity of reinforced concrete tubing with the bearing surface of the segment of the cylinder circumference in the conditions of horizontal mine workings of a circular cross section.

1 cl, 6 dwg