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Large-aperture pretension base plate hollow grouting device

A grouting device and pre-tensioning technology, applied in shaft equipment, shaft lining, tunnel lining, etc., can solve problems such as inability to achieve better anchoring effects, achieve easy mechanical or manual installation, simple method, improve work efficiency and reliability effect

Inactive Publication Date: 2012-04-18
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problem that the existing grouting technology cannot achieve a better anchoring effect, the present invention provides a hollow grouting device for large-aperture pre-tensioned floor. The large-aperture pre-tensioned bottom plate hollow grouting device adopts the method of mechanical anchoring, and uses the structural characteristics that the inverted gun thorn can be opened and closed according to the diameter of the anchor hole and can only advance and not retreat, so as to realize the effective anchoring of the anchor cable. Apply pre-tension before grouting

Method used

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  • Large-aperture pretension base plate hollow grouting device

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Embodiment Construction

[0021] In the figure, the grouting device includes a fastening section A, a grouting section B and an anchoring section C. The anchoring section C includes a barbed nail 7, a limit block 8, a pin 9, an inner anchor section lock 10 and a clip Sheet 11, the anchor section C has a section of tubular inner anchor section lock 10 set on the cable body 5, the upper end of the inner anchor section lock 10 is provided with an inverted lance nail groove, and the groove is hinged with the inverted lance thorn 7 through a pin. The outer welding limit block 8 of the inverted gun spike groove limits the final opening angle of the inverted gun spike 7 to 60 degrees. The lower part of the inner anchor section lock 10 is provided with an inner taper hole, and the taper hole is fitted with the cable body 5. There are three conical clamping pieces 11, the clamping piece 11 clamps the cable body 5 inside, and the outside of the clamping piece 11 is close to the inner cone hole surface of the in...

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Abstract

The invention relates to a large-aperture pretension base plate hollow grouting device, which comprises a fastening section A, a grouting section B and an anchoring section C. In the large-aperture pretension base plate hollow grouting device, a mechanical anchoring mode is adopted; by using a structural characteristic of a pouring bayonet nail that the pouring bayonet nail can be opened or closed and can only move forward instead of moving backward according to a diameter of an anchoring rod hole, an anchoring rope can be effectively anchored; meanwhile, pretension can be applied before grouting. The device has a simple structure and lower cost, is accepted by the market easily, is easy to install mechanically or manually. By adoption of the device, the fastening efficiency and the reliability of rock bodies can be effectively improved; and an important technical insurance is provided to support and protect deep soft rock alleys easily and to realize safety production in mines; furthermore, the method is simple and is easy to implement; time and labor are saved; the efficiency is high; and the large-aperture pretension base plate hollow grouting device has a wide practicability.

Description

technical field [0001] The invention relates to a grouting device, in particular to a large-aperture hollow grouting device for a pre-tensioned floor suitable for the fields of mining engineering, tunnels, underground engineering and water conservancy engineering. Background technique [0002] Soft rock support in deep wells with high ground pressure has always been a major technical problem in coal mining, and it has also been the key research object of domestic and foreign underground mining professionals for decades. The subsidence problem of soft rock roadway is a key technical problem affecting the success or failure of high ground stress soft rock roadway support. As a channel for safe production in coal mines, the importance of roadway floor management is self-evident. Practice has proved that the use of anchoring and grouting support is an effective way to strengthen the soft and broken surrounding rock, that is, using grouting anchor rods (cables) to reinforce t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10
Inventor 张农陈亮李桂臣阚甲广韩昌良姚亚虎
Owner CHINA UNIV OF MINING & TECH
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