Retractable constant force yielding anchor bolt for dynamical pressure soft rock lane

A technology for giving way to rock bolts and soft rocks. It is applied in the installation of bolts, mining equipment, earthwork drilling and mining, etc. It can solve the problem of increased support and achieve the effects of cost saving, ingenious design and large moving stroke.

Active Publication Date: 2012-07-04
NANTONG ZHONGYI BOILER EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the bolt system needs to be configured with a pressure sensor and a monitoring system, which makes the support increase too high

Method used

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  • Retractable constant force yielding anchor bolt for dynamical pressure soft rock lane
  • Retractable constant force yielding anchor bolt for dynamical pressure soft rock lane
  • Retractable constant force yielding anchor bolt for dynamical pressure soft rock lane

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Embodiment Construction

[0013] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further elaborated below in conjunction with specific embodiments and illustrations.

[0014] Such as figure 1 As shown in the figure, a retractable and constant pressure anchor rod for dynamic pressure soft rock roadway is composed of anchor rod body 1, tray 2, pull rod 3, pre-tightening adjustment bolt 4, main spring 5, pin shaft 6, knife-shaped cam 7 , Auxiliary spring 8, anchor head frame 9, roller 10, roller frame 11 and nut 12 are formed. Wherein, the tail of the anchor body 1 is provided with external threads, and the head of the pull rod 3 is provided with internal threads, and the anchor body 1 and the pull rod 3 are connected through threads; the tray 2 is set on the pull rod 3, and the The adjusting bolt 4 and the nut 12 are connected with the anchor head frame 9; the roller frame 11 is fixed on the ta...

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PUM

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Abstract

The invention relates to a retractable constant force yielding anchor bolt for a dynamical pressure soft rock lane. The retractable constant force yielding anchor bolt consists of an anchor bolt body, a tray, a pull rod, a pre-tightening adjusting bolt, a main spring, a pin roll, a knife-shaped cam, an auxiliary spring, an anchor head framework, a roller, a roller rack and a nut, wherein the anchor bolt body is in threaded connection with the pull rod; the tray can move along the pull rod under the action of an external force; and in the moving process, a synthetic pre-tightening force to the tray caused by the main spring and the auxiliary spring is basically kept unchanged, namely the constant force is kept. When surrounding rocks of the dynamical pressure soft rock lane are deformed, the tray moves through belt load and yield so as to release the stress. After the surrounding rocks relive the pressure, the tray moves back for strengthening and realizes secondary reinforcing for the surrounding rocks. When the surrounding rocks are repeatedly deformed due to stress disturbance, the anchor bolt can form 'yielding-supporting-yielding circular support and flexible support for the surrounding rocks, and thus the damage on the lane is avoided. The retractable constant force yielding anchor bolt disclosed by the invention is ingenious in design and compact in structure; the tray has long moving stroke; and except an anchor bolt body, other parts of the retractable constant force yielding anchor bolt can be detached for recycling, so that the cost is saved.

Description

Technical field: [0001] The invention relates to the field of support devices for underground engineering, in particular to a retractable and constant-force yielding bolt for a dynamic pressure soft rock roadway. Background technique: [0002] With the increase of coal mine mining depth, the problem of soft rock is becoming more and more serious, and the support problem of dynamic pressure soft rock roadway is becoming more and more prominent. The dynamic pressure soft rock roadway has three characteristics: first, the rock mass environment where the surrounding rock is located is complex, the rock mass is weak, broken, loose, and frequently affected by disturbance; second, the physical and mechanical properties of the surrounding rock are special, the rock strength is low, The weathering is serious and the rheology is large; the third is that the pressure of the roadway is strong and unstable. The pressure of the surrounding rock is fast at the beginning, and the deformatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D21/00
Inventor 王成军沈豫浙
Owner NANTONG ZHONGYI BOILER EQUIP
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