Spin anchoring pipe

Abstract

The invention relates to a spin anchoring pipe comprises an anchor pipe body and an inner injection tensioning sleeve. The anchor pipe body includes a steel pipe, one end of the steel pipe is providedwith a longitudinal crack, and the other end is provided with a variable diameter sleeve head. A tray, a check ring, a rubber slurry-stopping plug and an anchoring spinning wire are sequentially arranged between the variable diameter sleeve head and the longitudinal crack, the check ring is welded to the steel pipe and has a distance of 200-400 mm from the variable diameter sleeve head, the rubber slurry-stopping plug is close to the check ring, the anchoring spinning wire is welded to a pipe body of the steel pipe, the inner injection tensioning sleeve includes an inner injection tensioningpipe passing through the steel pipe, a cone body is welded to one end of the inner injection tensioning pipe close to the longitudinal crack, and the other end is provided with an initial anchoring nut on the outer side of the variable diameter sleeve head. The spin anchoring pipe performs high-pressure grouting and can improve the diffusion radius, the anchor pipe supporting performance is improved, the grouting is reliable, and the construction is convenient.

Description

technical field [0001] The invention relates to a spin anchor injection tube. Background technique [0002] In recent years, with the increasing scale of mining, the mining depth has increased year by year, the mining depth of coal mines has increased at a rate of 8-12m / year, and the eastern mines are developing at a rate of 10-25m / year. The pressure is also increasing, especially the deep roadway is located in the unstable rock mass affected by mining, weak rock formation and broken zone, and the weak surface of the surrounding rock is developed, which makes the stability of the surrounding rock of the roadway poor. Great difficulty came. Under these complex and difficult conditions, the use of conventional anchor rods / cables or sheds for support cannot meet the requirements for roadway surrounding rock control, the roadway is seriously deformed and damaged, and the maintenance cost is high. [0003] High-strength anchor-grouting support technology is a new roadway suppor...

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the increasing scale of mining, the mining depth has increased year by year, the mining depth of coal mines has increased at a rate of 8-12m / year, and the eastern mines are developing at a rate of 10-25m / year. The pressure is also increasing, especially the deep roadway is located in the unstable rock mass affected by mining, weak rock formation and broken zone, and the weak surface of the surrounding rock is developed, which makes the stability of the surrounding rock of the roadway poor. great difficulty

Under these complex and difficult conditions, the use of conventional anchors / cables or sheds for support cannot meet the requirements for roadway surrounding rock control, resulting in serious roadway deformation and damage and high maintenance costs

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