Multi-point inverted-oblique-type self-locking anchor bolt

Abstract

The invention relates to the technical field of coal mine tunnel support equipment, in particular to a multi-point inverted-oblique-type self-locking anchor bolt. The multi-point inverted-oblique-typeself-locking anchor bolt comprises a multi-point inverted-oblique-type self-locking device, an anchor bolt body, a supporting plate and a nut, wherein the multi-point inverted-oblique-type self-locking device comprises a cylinder; oblique sliding grooves with the dimension of 18 mm * 18 mm * 80 mm are separately formed at two sides of the cylinder; oblique sliding arrows matching the oblique sliding grooves are arranged in the oblique sliding grooves; the outer surfaces of the oblique sliding grooves are inverted serrated; a thread groove with an opening facing downward is formed at the lowerpart of the cylinder; two ends of the anchor bolt body are both provided with threads; the upper end of the anchor bolt body is in threaded connection with the thread groove; and the lower end of theanchor bolt body is in threaded connection with the nut. The multi-point inverted-oblique-type self-locking anchor bolt has the advantages of simplifying the operation, greatly accelerating the speedof bolt support, recycling the anchor bolt body, the supporting plate and the nut for use, and greatly saving the cost. The multi-point inverted-oblique-type self-locking anchor bolt meets the environmental protection requirements with no pollution in the production and using process, and can provide guarantee for the safety of tunnels.

Description

technical field [0001] The invention relates to the technical field of coal mine roadway support equipment, in particular to a multi-point inclined self-locking bolt. Background technique [0002] In the coal mine roadway support, the bolt is the most widely used and used supporting equipment. It strengthens 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 In engineering technology, the main reinforcement of slopes, tunnels and dams. As a tensile member that goes deep into the ground, the anchor rod is connected to the tray at one end, and the other end goes deep into the ground. The whole bolt is divided into a free section and an anchor section. The free section refers to the section that transmits the tension at the head of the anchor to the anchor area, its function is to apply prestress to the anchor rod; the anchor section refers to the area where the anchor rod and the coal sample...

AI Technical Summary

Problems solved by technology

[0003] The anchoring section of the existing anchor rod is mainly anchored by resin anchoring agent. First, the anchoring takes a relatively long time and the speed is limited; second, the anchoring agent causes environmental pollution; third, the anchor rod is not recyclable, causing waste

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