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Tray and anchor system for underground coal mine anchor rod supporting

A bolt support and pallet technology, which is applied in the installation of bolts, mining equipment, earthwork drilling, etc., can solve the problems of damage to the bolt body, affecting the strength of the bolt support, and insufficient pre-tightening force. The effect of stress concentration

Inactive Publication Date: 2017-01-18
CCTEG CHINA COAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the actual support effect is not ideal. When the pre-tightening force is large, it is easy to cause damage to the pallet, or damage to the threaded part of the anchor rod body; The applied force is not enough, which seriously affects the supporting strength of the bolt
[0003] At present, there is no support equipment and method in the prior art that can apply sufficient preload force to the anchor rod and avoid the easy damage of the threaded part of the tray and the anchor rod body

Method used

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  • Tray and anchor system for underground coal mine anchor rod supporting
  • Tray and anchor system for underground coal mine anchor rod supporting
  • Tray and anchor system for underground coal mine anchor rod supporting

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The pallet used for bolt support in coal mines includes a pallet back layer 1 and a pallet belly layer 2; the pallet back layer 1 includes a pallet back bulge 101, a pallet back flattened portion 102 and a pallet back anchor Through hole 103; the tray web 2 includes a tray web bulge 201, a tray web cylinder 202 and a tray web anchor rod through hole 203; the manufacturing material of the tray back layer 1 is steel, and the tray Abdominal layer 2 manufacture material is rubber.

[0030] In this embodiment, the raised portion 101 of the back layer of the tray is arc-shaped, and the tray cavity 3 is formed between the upper end surface of the raised portion 201 of the belly layer of the tray and the lower end surface of the raised portion 101 of the back layer of the tray; When carrying out support, the lower end surface of the flat part 102 of the back layer of the tray is in full contact with the end surface of the anchoring rock mass 5, and the lower end surface of the ...

Embodiment 2

[0037] Compared with Embodiment 1, this embodiment has the same technical characteristics except the following technical characteristics:

[0038] The pallet back bulge 101 is arc-shaped, and the upper end surface of the tray belly bulge 201 is in full contact with the lower end surface of the tray back bulge 101; when supporting, the pallet back is flat The lower end surface of the portion 102 is in full contact with the end surface of the anchoring rock mass 6, and the lower end surface of the raised portion 201 of the belly layer of the tray is also in full contact with the end surface of the anchoring rock mass 6.

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Abstract

A tray for underground coal mine anchor rod supporting comprises a tray back layer and a tray belly layer; the tray back layer comprises a tray back layer swell part, a tray back layer flat part and a tray back layer anchor rod through hole; the tray belly layer comprises a tray belly layer bulge part, a tray belly layer barrel part and a tray belly layer anchor rod through hole; the elasticity modulus of a tray back layer manufacturing material is greater than that of a tray belly layer manufacturing material; the tensile strength of the tray back layer manufacturing material is greater than that of the tray belly layer manufacturing material. The tray can provide greater pretightening force, and meanwhile, can prevent the tray and a rod body thread part of an anchor rod from being damaged due to stress concentration.

Description

technical field [0001] The invention relates to a tray and an anchoring system used for bolt support in coal mines. Background technique [0002] Ordinary bolt support system is composed of bolt body, anchoring agent, tray and nut. The specific support method is to insert the anchor rod body into the anchor rod hole where the anchoring agent has been placed and rotate and stir. After the anchoring agent, the anchor rod body and the rock wall are solidified, tighten the nut, and use the blocking effect of the anchor rod tray and the rock wall Stretch the bolt body to realize the application of the pre-tightening force of the bolt support system and achieve the purpose of support. However, the actual support effect is not ideal. When the pre-tightening force is large, it is easy to cause damage to the pallet, or damage to the threaded part of the anchor rod body; The applied force is not enough, which seriously affects the supporting strength of the bolt. [0003] At presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D21/00
CPCE21D21/008
Inventor 吴宝杨邓志刚程志恒赵善坤季成任天飞王寅刘波刘博文张宁博冯宇峰李少刚
Owner CCTEG CHINA COAL RES INST
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