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Self-drilling rockbolt

A self-drilling, bolting technology, applied in drill bits, drilling equipment, earth-moving drilling, etc., can solve the problems of reduced construction efficiency, affecting the smooth progress of grouting, blockage, etc., and achieve a reasonable fixation effect

Inactive Publication Date: 2005-01-19
广州极思意环境技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the aforementioned drill bit is to leave an air ejection hole in an oblique direction from the axis center to the end, and the drill powder generated during the drilling process will block the air hole, which not only reduces the construction efficiency, but also Various problems affecting the smooth progress of grouting

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0020] The following is attached Figure 1-11 The structural details of the embodiments of the present invention are described in further detail:

[0021] The self-drilling anchor consists of a drill bit and an anchor connected with the drill bit. 1 is the main body of the drill, 2 is the body of the drill, and 3 is the head of the drill, which is slightly larger than the body 2 of the drill. 4 is the cross-shaped blade body formed at the top of the head 3 of the drill bit, 5 is the internal thread hole connected to the drill rod reserved on the drill bit body, 6 is connected with the internal thread hole, and is larger than the drill bit The hole diameter of the internally threaded hole 5 reserved at the part is slightly less than the hollow part, and 7 is a concave groove left around the drill bit head 3 between adjacent blade bodies in the cross-shaped blade body 4, and 8 is from The above-mentioned small-diameter hollow part 6 starts from the air ejection hole in the obl...

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PUM

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Abstract

The invention provides a self-drilling anchor pile for fixing construction in easily collapsed area with low independency. In the said anchor pile, an internal screwed hole connected to anchor pile body is preserved in drill bit main body, while a hollow part which is less than the diameter of internal screwed hole is preserved in drill bit head which is more than external diameter of drill body, on the end-face of drill bit, a number of blade bodys are mounted in a certain intervals, a concave groove is arranged from head to body top of the drill bit between adjacent blade body, and air blowing holes having inclination characterize are arranged from small diameter hollow part of said drill bit head to concave groove lower part. Said structure can keep drilling ability and prevent air blowing hole from being blocked when blowing out rock dust from drill hole using compressed air.

Description

technical field [0001] The invention relates to a self-drilling anchor rod which uses an anchoring method to carry out stable and fixed construction on a ground with low self-supporting property and prone to collapse. Background technique [0002] Use the self-drilling anchor bit to anchor the ground with low self-support and prone to collapse. When the drill bit is drilling, in order to maintain its drilling ability and prevent clogging, the air blowing pipe is usually used to blow the rock powder during construction. Blow out from the hole to ensure the smooth progress of the application. At present, most of the inventions and designs of drill bits related to self-drilling anchor rods using this technology have been disclosed, and the structural features of most of the drill bits are: the hollow part of the drill bit installed at the end of the self-drilling anchor rod From the end, an inclined air ejection hole is opened toward the drill bit body, and the drill dust (bro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/80E21B10/60
Inventor 深井正良
Owner 广州极思意环境技术有限公司
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