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High-strength pretightening force compressible glass fibre reinforced plastic anchor rod

A technology of glass fiber reinforced plastics and pre-tightening force, which is applied in the installation of bolts, mining equipment, earthwork drilling and mining, etc. It can solve the problems of poor anchoring effect and low tensile strength of bolts, and achieve the effect of avoiding damage and improving torsional strength

Inactive Publication Date: 2009-08-05
张延策
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  • Summary
  • Abstract
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Problems solved by technology

[0003] The invention provides a high-strength pre-tightening force pressure fiberglass anchor rod, which effectively solves the problems of low tensile force and poor anchoring effect of the previous anchor rods

Method used

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  • High-strength pretightening force compressible glass fibre reinforced plastic anchor rod

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Embodiment Construction

[0009] When in use, first use the anchor drill to drill holes, then put the resin anchoring agent into the hole, and then install the glass fiber reinforced plastic anchor rod, etc. After the resin is cured, install the tray 2, the pressure ring 3, the nut 4, and tighten the nut 4. When the anchor rod is stressed during the support process, let the pressure ring 3 bear the pressure from both ends. When the pressure reaches a certain level, let the pressure ring 3 begin to deform, and the tray 2 moves backward, which also causes a part of the roadway wall to ground. compressive stress, effectively protecting the FRP anchor from breaking due to excessive pressure, the anchor can only slide back and forth in the tray 2, and cannot rotate; Let the pressure ring 3 pass into the tray 2, and then pass through the tray 2 and to the coal wall, thereby avoiding damage to the tail of the rod body due to excessive pre-tightening force applied to the nut 4, and improving the torsional stren...

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Abstract

The invention provides a high-strength pretightening-force yield anchor rod of glass fiber reinforced plastic, which effectively solves the problems of small tensioning force resistance and poor anchoring effect of the original anchor rod. A metal yield ring is arranged between a nut and a tray on an anchor rod assembly. The front end of the anchor rod of glass fiber reinforced plastic is a flat-annular body, and the diameter of the flat-annular body on the front end of the anchor rod is bigger than that of the tail part of the anchor rod. The anchor rod of glass fiber reinforced plastic is effectively prevented from being broken by over-high stress, and the tail part of the rod body is prevented from being broken by applying pretightening force, thereby the torsional resistance of the anchor rod of glass fiber reinforced plastic is improved.

Description

Technical field: [0001] The invention belongs to the technical field of new material application, in particular to a novel mine support material. Background technique: [0002] At present, the anchor bolts used in underground coal mines mainly include threaded resin anchors, grouting anchors, hydraulic anchors, and seam anchors, etc., but there are many shortcomings in varying degrees, and most of them are used Made of metal material. In large-scale fully mechanized coal mining operations, metal materials are difficult to cut, easy to generate sparks, cause gas explosions, and damage fully mechanized cutting knives. The use of FRP anchors can effectively solve the above problems. However, the recently developed fiberglass anchors have also exposed the defects of low elongation. When the roadway is pressed, it acts on the FRP anchor rod, which is extremely easy to break due to the large tensile force. The ordinary structure FRP anchor rod does not dare to use force when it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D21/00
Inventor 张延策司兴菊张加冕郭秋镭石学新
Owner 张延策
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