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A method of using a large-deformation pressure-relief and anti-shock bolt

An impact-resistant, large-deformation technology, applied in the installation of bolts, earth-moving drilling, mining equipment, etc., can solve the problems of limited shock wave weakening, inability to play a lasting stable support role, complex structure, etc. Adjustment, good long-lasting stable support effect, simple structure effect

Active Publication Date: 2020-06-19
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The structure is complex, and when the surrounding rock is deformed, the vibration wave of the ground pressure, that is, the shock wave is absorbed by the energy-absorbing device. It is a passive energy absorption, and its weakening effect on the shock wave is quite limited. During use, it cannot play a good long-lasting and stable support role

Method used

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  • A method of using a large-deformation pressure-relief and anti-shock bolt
  • A method of using a large-deformation pressure-relief and anti-shock bolt
  • A method of using a large-deformation pressure-relief and anti-shock bolt

Examples

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Effect test

Embodiment 1

[0042] A method for using a large-deformation pressure-relief impact-resistant anchor rod, comprising the following steps:

[0043] a. Determine its tensile strength σm according to the material and diameter of the large-deformation pressure-relieving and anti-shock anchor, and select the relief piece 6 that produces fluid deformation when the force of the large-deformation pressure-relieving and anti-shock anchor reaches 80% σm;

[0044] b. According to the coal seam deformation characteristics and support requirements, determine the height of the relief cylinder 5, which is the allowable deformation of the coal seam;

[0045] c. Construction drilling, inserting anchoring agent in the drilling;

[0046] d. Wrap the anti-vibration sleeve 3 on the anchor head 2 of the large-deformation pressure-relieving and impact-resistant anchor rod, insert the large-deformation pressure-relieving and impact-resistant anchor rod with the anti-vibration sleeve 3 into the borehole and stir;

...

Embodiment 2

[0050] A method for using a large-deformation pressure-relief impact-resistant anchor rod, comprising the following steps:

[0051] a. Determine its tensile strength σm according to the material and diameter of the large-deformation pressure-relieving and anti-shock anchor, and select the relief piece 6 that produces fluid deformation when the force of the large-deformation pressure-relieving and anti-shock anchor reaches 80% σm;

[0052] b. According to the coal seam deformation characteristics and support requirements, determine the height of the relief cylinder 5, which is the allowable deformation of the coal seam;

[0053] c. Construction drilling, inserting anchoring agent in the drilling;

[0054] d. Wrap the anti-vibration sleeve 3 on the anchor head 2 of the large-deformation pressure-relieving and impact-resistant anchor rod, insert the large-deformation pressure-relieving and impact-resistant anchor rod with the anti-vibration sleeve 3 into the borehole and stir;

...

Embodiment 3

[0059] A method for using a large-deformation pressure-relief impact-resistant anchor rod, comprising the following steps:

[0060] a. Determine its tensile strength σm according to the material and diameter of the large-deformation pressure-relieving and anti-shock anchor, and select the relief piece 6 that produces fluid deformation when the force of the large-deformation pressure-relieving and anti-shock anchor reaches 80% σm;

[0061] b. According to the coal seam deformation characteristics and support requirements, determine the height of the relief cylinder 5, which is the allowable deformation of the coal seam;

[0062] c. Construction drilling, inserting anchoring agent in the drilling;

[0063] d. Wrap the anti-vibration sleeve 3 on the anchor head 2 of the large-deformation pressure-relieving and impact-resistant anchor rod, insert the large-deformation pressure-relieving and impact-resistant anchor rod with the anti-vibration sleeve 3 into the borehole and stir;

...

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Abstract

The invention discloses a using method of a large-deformation pressure relief impact-resistance anchor rod, and belongs to the technical field of roadway or tunnel support. The using method is characterized by comprising the following steps that a, a yielding piece is selected; b, the height of a yielding cylinder is determined; c, drilling construction is conducted, and an anchoring agent is plugged into a drilled hole; d, the large-deformation pressure relief impact-resistance anchor rod with a vibration-resistance sleeve is plugged into the drilled hole to be stirred; and e, a supporting disc, the yielding cylinder, the yielding piece, a yielding cylinder cover, a gasket and a nut sleeve the tail end of a rod body of the anchor rod at a time, the nut is tightened, and pretightening force is applied to the rod body of the anchor rod. According to the using method, overall operation is smooth and easy, a ground pressure vibration wave can be effectively reduced; and by matching with the flowing deformation yielding piece, the yielding piece is subjected to flexible deformation after reaching certain stress and is extruded from the space between the yielding cylinder and the yielding cylinder cover, a pressure relief space is reserved for surrounding rock deformation, thus the anchor rod can be prevented from being pulled apart and losing efficacy, and the using method is suitable for roadway or tunnel support, and the support effect is good.

Description

technical field [0001] The invention relates to the technical field of roadway or tunnel support, in particular to a method for using a large-deformation pressure-relieving and impact-resistant bolt. Background technique [0002] As an effective support equipment, the bolt has been widely used in the support field. With the depletion of shallow resources, more and more mines have entered deep mining. [0003] First of all, with the continuous deepening of the mining depth, the deep surrounding rock often shows the characteristics of deformation. The existing ordinary bolts are not suitable for supporting the deformed surrounding rock. When the surrounding rock deforms, due to the large amount of deformation, the bolt pulls Most of the existing deformed bolts have high requirements on materials and complex structures, so it is difficult to popularize and use them. Secondly, during the mining process, due to the periodic collapse of the roof and other reasons, severe shock w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D21/00E21D20/02
CPCE21D20/02E21D21/00E21D21/0033
Inventor 裴向军孙小岩
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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