Fractured surrounding rock roadway three-region coordinated and coupled supporting system and construction method thereof

Abstract

A fractured surrounding rock roadway three-region coordinated and coupled supporting system comprises a deep supporting structure and a peripheral surface supporting structure. The deep supporting structure comprises a plurality of three-region coordinated supporting combined anchor rods. The three-region coordinated supporting combined anchor rods are uniformly and peripherally arranged along a top plate, two sides and a bottom plate of a roadway and penetrate an anchorage fracturing region, a plastic region a and an elastic region. The peripheral surface supporting structure comprises a steel beam, a metal net and a hardened concrete layer, the steel beam and the metal net are matched for supporting along the top plate and two sides of the roadway, and the hardened concrete layer is laidon the bottom plate of the roadway. The invention further discloses a construction method of the fractured surrounding rock roadway three-region coordinated and coupled supporting system. By combination of the fracturing region, the plastic region a and the elastic region into a whole, the integral bearing capacity and deformation resistance of roadway surrounding rock are effectively improved, collapse in the fracturing region or the plastic region can be effectively avoided, giving full play to the bearing capacity of the elastic region is realized, and roadway surrounding rock stability isguaranteed.

Description

technical field [0001] The invention belongs to the technical field of anchor cable support for mine support engineering, and in particular relates to a three-area coordinated coupling support system and a construction method for broken surrounding rock roadways. Background technique [0002] In coal mine roadway support engineering, anchor cable support is a common form of roof support. The anchor cables commonly used in coal mines are 7-strand or 19-strand steel strand structures, and the diameters of commonly used anchor cables are 15.2mm, 17.8mm, 20mm, and 22mm. Compared with the bolt support, the anchor cable has the advantages of high strength and long length, and the anchor cable can be anchored into the deep stable rock formation of the roof, so the anchor cable support has a significant effect on the stability control of the roof. However, with the gradual exploitation of coal resources, the stress environment of the roadway surrounding rock is gradually deteriorat...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems existing in the prior art, the present invention provides a three-area cooperative coupling support system and construction method for the roadway surrounding rock, aiming at the three-area "fracture zone, plastic zone and elastic zone" of the roadway surrounding rock. The collaborative coupling support technology effectively solves the technical problems existing in the existing technology such as "poor correlation between the three areas, poor correlation between the two sides of the roof and the bottom plate, short length of grouting bolts, and easy collapse in the fracture zone and plastic zone"

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