A flexible anchor

Abstract

The invention relates to the field of anchor rods, in particular to a flexible anchor rod. The flexible anchor rod comprises a storing structure, a sleeve, a sealing and blocking structure, an anchorrod body, a grouting structure and a limit structure. The use of the limit structure at the bottom end of the sleeve increases the contact area between the limit structure and a rock mass, and meanwhile, the limit structure is effectively prevented from pulling out the rock mass. The use of the limit structure being matched with the sealing and blocking structure enables the sealing and blocking structure to close to the limit structure, the sealing between the sealing and blocking structure and the rock mass is greatly improved; meanwhile, the sealing and blocking structure abuts against therock mass and then acts on the limit structure, the limit structure drives the sleeve to expand and move to the interior of the rock mass, and the stability of the sleeve is greatly improved. The useof the sealing and blocking structure is convenient for the discharge of water flow and methane in holes, the influence of gas and rain water is avoided on the stability of the anchor rod, the water flow is avoided to affect the sealing between the sealing and blocking structure and the rock mass, and meanwhile, the limit structure is connected with the sealing and blocking structure so as to sealthe sealing and blocking structure after the limit structure is completely expanded.

Description

technical field [0001] The invention relates to the field of anchor rods, in particular to a flexible anchor rod. Background technique [0002] Anchor is the most basic part of roadway support in contemporary coal mines. It reinforces the surrounding rock of the roadway so that the surrounding rock can support itself. Now the bolt is not only used in mines, but also in engineering technology. Slopes, tunnels, and dams are mainly reinforced; the anchor rod is a tension member that goes deep into the ground. One end of it is connected to the engineering structure, and the other end goes deep into the ground. The whole bolt is divided into a free section and an anchoring section. The free section refers to The area where the tensile force at the head of the anchor is transmitted to the anchor, its function is to prestress the anchor. [0003] However, the traditional flexible anchor rod is used in coal mines. There is water flow and methane gas discharged from the grouting hol...

AI Technical Summary

Problems solved by technology

[0003] However, the traditional flexible anchor rod is used in coal mines. There is water flow and methane gas discharged from the grouting hole inside the coal mine tunnel. When the grouting hole is directly sealed through the gasket, the sealing is not enough. The construction requirements of the grouting hole are strict. When the hole is large, the tightness between the anchor rod and the rock mass is poor, and the tightness between the anchor rod and the gasket is poor.

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