Novel composite type groutable anchor rod

A grouting bolt and composite technology, which is used in the installation of bolts, mining equipment, earth-moving drilling, etc., can solve the problems of different hole sizes, small end of grouting range and tail grouting time difference, etc.

Inactive Publication Date: 2017-04-19
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the problems that most grouting bolts can only be grouted at the tail, the grouting range is small, and the grouting time difference between the end and the tai

Method used

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  • Novel composite type groutable anchor rod
  • Novel composite type groutable anchor rod
  • Novel composite type groutable anchor rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] (The grouting retaining ring is threadedly connected with the inner rod body and the outer casing through the inner and outer threads respectively to ensure its integrity. The inner rod body and the tail of the outer casing have no gap to prevent the grout from flowing into the return chamber 7 through the gap between the two, causing Backflow illusion) When installing, first install according to the ordinary anchor rod installation process, drill holes, place anchoring agent in the drill holes, and then place the anchor rod in the drill hole (the depth of the drill hole should be longer than the length of the anchor rod, so that the anchor rod The rod is completely submerged in the drill hole to ensure the anchoring effect when the nut is tightened on the backing plate). When grouting, the grout can be injected into the grouting cavity 3 between the outer casing 1 and the inner rod body 2 through the grouting hole 6 on the retaining ring. The grout is injected into the ...

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Abstract

The invention discloses a novel composite type groutable anchor rod and belongs to the technical field of mineral engineering anchorage supporting. The anchor rod comprises an outer sleeve, an inner rod body of which the middle is provided with a backflow cavity, a base plate, a nut and a check ring, and grouting holes are formed in the check ring. Grout is poured into a grouting cavity between the outer sleeve and the inner rod body through the grouting holes in the check ring and then is poured into a rock stratum through holes formed in the outer sleeve, after drilling holes are filled with the grout fully, the grout flows back through the backflow cavity, and accordingly grouting is completed. By adopting the anchor rod to conduct supporting, the problems that traditional grouting anchor rods are not high in supporting force and limited in grouting range, and whether drilling holes are filled with grout completely cannot be effectively judged can be solved; grouting is conducted on the deep soft rock stratum, a plastic zone can be decreased, the anchorage force of the anchor rod is increased, and accidents are decreased.

Description

technical field [0001] The invention relates to the field of mining engineering anchoring support technology, in particular to a novel composite groutable anchor rod. Background technique [0002] (1) At present, there are some groutable bolt supports in the high-stress soft rock roadway support, but they are basically hollow bolts, and the cavity inside the bolt is used for grouting. Although the purpose of grouting can be achieved, the Without the support function of the anchor itself, the support effect is not ideal, and it is difficult to promote. (2) At present, most of the grouting anchors only open holes at the end of the anchor for grouting, the grouting range is limited, and the effect is not ideal. (3) At present, most of the grouting bolts basically use holes of equal size for grouting, without considering the time difference between the end and the tail of the grouting. When injecting fast-curing materials, the grout cannot completely fill the drilled hole. Cur...

Claims

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Application Information

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IPC IPC(8): E21D21/00E21D20/02
Inventor 张培森李凯阚忠辉赵仕钧苗旺武守鑫赵亚鹏王嘉伟
Owner SHANDONG UNIV OF SCI & TECH
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