Device and method for rapidly increasing initial anchoring force of expanding-shell anchor head

An anchoring device and anchoring force technology, which is applied in earth-moving drilling, bolt installation, mining equipment, etc., can solve the problems of failure of the expanding shell anchor head, weakening of the frictional force effect, and impact disturbance of surrounding rock, etc. Initial anchoring force, solving anchoring instability, good moisture resistance

Inactive Publication Date: 2016-11-16
中国葛洲坝集团第三工程有限公司
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  • Claims
  • Application Information

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Problems solved by technology

However, when part of the rock mass blasting construction (rock burst occurs), the surrounding rock is impacted and disturbed, which causes the frictional force effect between the anchor head of the bolt and the surrounding rock to weaken, which leads to the force failure of the anchor head of the expansion shell. , support failure

Method used

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  • Device and method for rapidly increasing initial anchoring force of expanding-shell anchor head
  • Device and method for rapidly increasing initial anchoring force of expanding-shell anchor head
  • Device and method for rapidly increasing initial anchoring force of expanding-shell anchor head

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Embodiment approach

[0035] Such as figure 1 with figure 2 As shown, the anchoring improvement device for the shell expansion anchor head includes a connecting sleeve 3, a slurry blocking plug 2, a shell expansion anchor head 1 and a polymer adhesive 11; the two-component polymer adhesive is packed in a sealing bag 5; The shell anchor head 1 is on the back of the bag with a two-component polymer adhesive sealing bag 5; the shell expansion anchor head 1 and the anchor rod 4 are connected by a threaded connection sleeve; the connection sleeve 3 is connected to the shell expansion anchor head 1. A slurry blocking plug 2 is installed in the middle; the connecting sleeve 3 and the anchor rod 4 are connected by threads, and the upper pipe wall of the connecting sleeve 3 is provided with a slurry hole. The implementation method of the present invention is as follows:

[0036] a. Put the shell expansion anchor 1 and the sealed bag 5 into the bottom of the drill hole;

[0037] b. Install a connecting sleeve 3...

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Abstract

The invention discloses a device and a method for rapidly increasing an initial anchoring force of an expanding-shell anchor head. The device mainly comprises a connecting sleeve, a slurry separation stopper, the expanding-shell anchor head and a bagged two-component high polymer binder. In an engineering support, the device is mounted at the top of an anchor rod for use; through the use of a flexible bonding anchoring device formed by mutual fitting of developed bagged slurry and the expanding-shell anchor head, the problem that the rockburst impact resistance of an energy-absorbing anchor rod is poor due to the fact that an anchored end loses stability because wall rock is damaged by impact disturbance is solved, and the shock resistance and the rockburst resistance are improved substantially. Through a cohesive force generated after chemical reaction of the bagged two-component high polymer binder, the device can anchor the expanding-shell anchor head and a hole wall together tightly, and the initial anchoring force of the anchor rod is improved.

Description

Technical field [0001] The invention relates to the field of rock mass support for deep-buried hydraulic tunnels, in particular to a device and method for improving the initial anchoring force of the expansion shell anchor head of a hollow grouting anchor rod quickly. Background technique [0002] When using TBM for tunneling construction in deep-buried hydraulic tunnels, in order to meet the purpose of rapid tunneling, no grouting is required for 50-100m behind the tunnel face, and grouting is delayed. In this section, the bolt support is mainly carried by the expansion shell anchor head, and this force is mainly caused by the mechanical friction between the expansion shell anchor head and the rock formation of the hole wall. During rock blasting construction (rockburst), impact disturbance is generated on the surrounding rock, which causes the effect of friction between the anchoring head of the bolt and the surrounding rock to weaken, which leads to the failure of the anchor h...

Claims

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Application Information

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IPC IPC(8): E21D21/00E21D20/00
CPCE21D20/003E21D21/008
Inventor 柳同祥廖光荣朱则浩陈恩瑜陈松白现军黎方李林辉杨超卢晶徐建波陈琼
Owner 中国葛洲坝集团第三工程有限公司
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