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Grouting anchor and using method thereof

A technology of grouting bolts and bolts, which is applied to the installation of bolts, earthwork drilling, mining equipment, etc., can solve the problems of affecting the construction speed of tunneling and supporting, increasing the amount of roadway tunneling and supporting engineering, and increasing project costs. Achieve the effect of simplifying the grouting reinforcement and support process of broken surrounding rock, solving multiple construction problems, and improving the construction speed

Active Publication Date: 2016-02-24
TIANDI SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when self-drilling grouting drill pipe is used for grouting, the bottom end of the grouting drill pipe lacks an anchoring structure, and the axial preload cannot be applied after the drill pipe is driven into the surrounding rock, which has little supporting effect on the surrounding rock
Therefore, in the past, after the grouting reinforcement of the broken surrounding rock, it was necessary to re-drill the hole again and carry out bolt support, which greatly increased the amount of roadway excavation and support, which seriously affected the construction speed of the excavation support. Protective effect, resulting in a large waste of materials, increasing the cost of the project

Method used

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  • Grouting anchor and using method thereof
  • Grouting anchor and using method thereof
  • Grouting anchor and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Such as image 3 As shown, a grouting anchor provided in this embodiment includes a coaxial anchor body, a wedge 10 and a drill bit 30, one end of the wedge 10 is connected to the anchor body, and the other end is connected to the drill bit 30, wherein the drill bit 30 Installed on the front end of the wedge body 10 through a right-handed thread, the front end and the rear end in this embodiment are the right end and the left end in the drawings respectively; there are grouting passages running through the anchor body, the wedge body 10 and the drill bit 30. The grout channel is set on the axis of the bolt body, the wedge body 10 and the drill bit 30, so that it has the function of grouting;

[0050] When the bolt body rotates in the same direction as the drill bit 30 cuts, the relative positions of the bolt body and the wedge body 10 and the drill bit 30 are fixed, and the bolt body drives the wedge body 10 and the drill bit 30 to rotate synchronously, and the drill bi...

Embodiment 2

[0072] A method for using a grouting anchor provided in this embodiment includes the following steps:

[0073] S1. Drilling: insert the rod tail nut 17 into the rocker drill sleeve, so that the rocker drill rotates forward (outlet shaft rotates to the right), even if the rocker drill rotates in the same direction as the drill bit 30 cuts, the sleeve passes through the rod tail Nut 17 and shear pin 18 drive rod body 14 to rotate clockwise, and the overrunning clutch transmission structure is locked, and wedge body 10 and rod body 14 rotate clockwise synchronously. The wedge body 10 drives the drill bit 30 to cut and break the surrounding rock 9 . As the drilling rig advances, the grouting bolt gradually penetrates into the broken surrounding rock 9 .

[0074] During the drilling process of the grouting bolt, the grouting bolt as a whole remains in the initial assembly state, that is, there is no relative rotation between the wedge body 10 and the rod body 14, the expansion she...

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Abstract

The present invention relates to the technical field of mine support projects, and concretely relates to a grouting anchor and a using method thereof. The grouting anchor comprises an anchor body, a wedge obdy and a drill, wherein one end of the wedge body is inserted into the anchor body while the other end is connected with the drill; a grouting passage penetrates through the anchor body, the wedge body and the drill; when the anchor body rotates in the same direction as a cutting direction of the drill, the position of the anchor body in relative to the wedge body and the drill is fixed, and the anchor body drives the wedge body and the drill to rotate synchronously; and the using method of the grouting anchor comprises five steps of hole drilling, anchoring, pre-tightening, hole sealing and grouting. According to the grouting anchor and the using method thereof, drilling, anchoring and grouting can be completed continuously in one-time construction, broken surrounding rock grouting reinforcement and supporting techniques are simplified, and construction speed of broken surrounding rock tunnelling support is raised.

Description

technical field [0001] The invention relates to the technical field of mine support engineering, in particular to a grouting anchor rod and its use method, and more particularly to a drill-and-bolt integrated grouting anchor for grouting reinforcement and support of broken coal and rock mass Rods and methods of use. Background technique [0002] Bolt support is to anchor one end of the bolt in the coal rock body, and apply an axial pre-tightening force to the bolt outside the coal rock mass, and restrain the deformation, separation, cracking and expansion of the surrounding rock of the roadway through supporting components such as pallets. Slip and miss. Bolt support, as a safe and efficient main support method for coal mine roadways, has been widely promoted and applied in coal mine roadway support in my country. [0003] The conventional bolt support construction method is to use anchoring agent to anchor the bolt 3 in the surrounding rock mass 1 of the roadway. The inst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D21/00E21D20/02
Inventor 康红普杨景贺林健吴拥政王正胜高富强娄金福张振峰吴建星吕华文邵培森
Owner TIANDI SCI & TECH CO LTD
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