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Bag type grouting anchoring device and anchoring method

An anchoring device and grouting technology, which is applied to earth-moving drilling, bolt installation, mining equipment, etc., can solve the problems of inability to fix the bolt, and achieve the effects of improving the anchoring effect, rational utilization of materials, and simple and fast operation.

Inactive Publication Date: 2014-02-26
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a fast and reliable bolt fixing device and anchoring method for the problem and deficiency that the soft coal seam cannot be firmly fixed to the bolt in the existing coal mine field.

Method used

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  • Bag type grouting anchoring device and anchoring method
  • Bag type grouting anchoring device and anchoring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: see figure 1 , the first bag-type grouting anchoring device and anchoring method is that the front and rear ends of the anchor rod 1 are respectively sleeved with a front annular expansion bag 3 and a rear annular expansion bag 2, and there is an end between the front and rear annular expansion bags. Grouting gap 8. The front and rear annular expansion bags communicate with the first grouting pipe 4 respectively, and the grouting gap 8 communicates with the second grouting pipe 6 .

[0012] The grouting opening 9 of the first grouting pipe 4 is located at the end of the anchor rod 1, and the first grouting pipe 4 is connected to the inner cavity of the front and rear annular expansion bags respectively. In this embodiment, a one-way valve 5 is arranged on the first grouting pipe 4, and the one-way valve 5 is arranged at the grout outlet in the front and rear annular expansion bags.

Embodiment 2

[0013] Example 2: see figure 2 , the second bag-type grouting anchoring device and anchoring method are basically the same as in Embodiment 1, except that the one-way valve 5 is set at the position of the grouting port 9 of the first grouting pipe 4 .

Embodiment 3

[0014] Embodiment 3: The drawings are not drawn, the content is basically the same as that of Embodiment 1, the difference is: no one-way valve is set on the first grouting pipe, when in use, only need to keep the first grouting pipe with sufficient pressure In order to stretch the front and rear annular expansion bags. After the second grouting pipe injects grout into the grouting gap and solidifies, the first grouting pipe can no longer be tested for pressure.

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Abstract

The invention discloses a bag type grouting anchoring device and an anchoring method. The front end and the rear end of an anchor rod are respectively and fixedly sleeved with an annular expanding bag. An area between the front annular expanding bag and the rear annular expanding bag is a grouting gap. A first grouting pipe is respectively communicated with an inner cavity of the front annular expanding bag and an inner cavity of the rear annular expanding bag. A second grouting pipe is communicated with the grouting gap. According to the bag type grouting anchoring device and the anchoring method, the anchor rod is fixed through grouting which is conducted twice, the two ends of the anchor rod are effectively sealed after grouting is conducted for the first time, so that pressurization of grout is facilitated when grouting is conducted for the second time, the high-pressure grout goes deep into a soft coal seam, and therefore a firm structure is formed. By the adoption of the bag type grouting anchoring device and the anchoring method, the anchoring effect is improved and operation is simple and convenient. The bag type grouting anchoring device and the anchoring method are suitable for popularization and application.

Description

technical field [0001] The invention relates to a bolt fixing technology in the field of coal mines, in particular to a bag-type grouting type bolt fixing device and an anchoring method. Background technique [0002] In the technical field of coal mines, bolts are widely used. The existing fixing method of bolts is to put the bolt body into the drilled hole after drilling in the coal seam, and then inject cement slurry or cement mortar through the grouting pipe. Anchor in the gap between the rod body and the drilled hole. The existing bolt technology cannot guarantee the fullness and integrity of the grouting body for loose coal seams; the holes drilled in soft coal seams are large, the anchoring agent fails, and cannot be anchored firmly. The compressive effect will weaken the bond friction strength between the anchor body and the coal seam. In a word, in the above-mentioned complex formations, the use of the current anchor bolt structure will seriously reduce the anchor ...

Claims

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Application Information

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IPC IPC(8): E21D20/02
Inventor 李辉闫海丰陈晓祥李超王新伟岳志奇
Owner HENAN POLYTECHNIC UNIV
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