Method of segmenting grouting by using grouting anchor cable

A technology of grouting anchor cables and segmental grouting, which is applied in the direction of earth drilling, installation of anchor rods, mining equipment, etc., can solve the problems such as inability to segmental grouting, and achieve the effect of improving adaptability

Pending Publication Date: 2019-06-14
付建辉 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the existing hollow grouting anchor cable cannot be grouted in sections, the present invention provides a method for segmental grouting using the grouting anchor cable

Method used

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  • Method of segmenting grouting by using grouting anchor cable
  • Method of segmenting grouting by using grouting anchor cable
  • Method of segmenting grouting by using grouting anchor cable

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Embodiment Construction

[0013] Such as figure 1 As shown, a method of segmented grouting using grouting anchor cables is as follows:

[0014] First arrange the grouting equipment in the roadway, drill the grouting anchor hole 10 in the roadway surrounding rock 11 according to the design, then put the hollow grouting anchor cable into the grouting anchor hole 10, and then connect the hollow grouting anchor cable The grouting equipment performs grouting in the hole to reinforce the cracks in the surrounding rock; wherein, the hollow grouting anchor cable is composed of a plurality of steel strands 12 spirally wound on the grouting core pipe 8 to form a cable body, and the top of the cable body is provided with The anchor head 13 is used to anchor the cable body at the bottom of the grouting anchor hole 10 with an anchoring agent through the anchor head 13; the grouting core tube 8 of the hollow grouting anchor cable is a soft plastic grouting tube, and the rear end of the cable body is welded with a hi...

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Abstract

The invention provides a method of segmenting grouting by using a grouting anchor cable to solve the problem that an existing hollow grouting anchor cable cannot be segmented grouting. The method of segmenting grouting by using the grouting anchor cable is characterized in that a grouting core tube of the hollow grouting anchor cable is a soft plastic grouting tube, a plurality of grout outlets are processed on corresponding sections of the soft plastic grouting tube, a supporting sleeve is installed, grout out gaps are formed between steel strands, thus self-sealing grout stopping plugs sleeve a part of the grout out gaps, and the rest of the grout out gaps are exposed; and firstly hollow cavities of the self-sealing grout stopping plugs are filled with grouts one by one, thus the hollowcavities quickly expand under the effect of grouting pressure to seal hole wall gaps at the two ends of each grouting section, the multiple grouting sections are naturally formed, and the grouts are uniformly diffused and injected into surrounding rock cracks.

Description

technical field [0001] The invention relates to geotechnical engineering support technology, in particular to mine grouting anchor cables. Background technique [0002] At present, with the increase of coal mine mining depth, the difficulty of roadway support and repair in the coal mine production process is also increasing, and grouting has become an effective means and method to solve the current support problems. The grouting method is divided into ordinary grouting and segmented grouting. Ordinary grouting is to install a grouting pipe from the orifice to grout inwards. The process is simple, but the grout spreads unevenly, especially for heterogeneous formations; segmental grouting can achieve a grouting effect with a uniform spread range. The advantages over ordinary grouting are more significant. The current segmental grouting methods mainly include two kinds of grouting methods: the drill pipe retreating type and the sleeve valve pipe retreating type. The drill pi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D20/02E21D21/00
Inventor 付建辉时耀坤
Owner 付建辉
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