An anchoring and grouting support method based on the principle of cracking inhibition

An anchoring and principle technology, which is applied in earthwork drilling, bolt installation, mining equipment, etc., can solve the problems of secondary cracking repair operation, unsatisfactory effect, time-consuming and laborious, etc., so as to avoid rock mass cracking into blocks, The effect of inhibiting the development of rock mass cracking and tensile failure and increasing strength

Active Publication Date: 2018-06-26
NORTHEASTERN UNIV LIAONING
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Problems solved by technology

[0004] The invention provides an anchoring and grouting support method based on the principle of cracking inhibition, which solves the technical problems in the prior art that the surrounding rock and the anchoring body are prone to secondary cracking and the repair operation is time-consuming and laborious, and the effect is not ideal

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  • An anchoring and grouting support method based on the principle of cracking inhibition

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Embodiment Construction

[0026] The embodiment of the present application provides a grouting support method based on the principle of cracking inhibition to solve the technical problems in the prior art that the surrounding rock and the anchoring body are prone to secondary cracking and the repair operation is time-consuming and laborious, and the effect is not ideal; Inhibit cracking, achieve self-repair, prevent rockburst, and improve the technical effect of repair efficiency.

[0027] In order to solve the above-mentioned technical problems, the general idea of ​​the technical solution provided by the embodiment of the present application is as follows: a method of anchoring and grouting support based on the principle of cracking suppression, comprising the following steps:

[0028] Install hollow support bolts in the support borehole;

[0029] Injecting the rock mass capsule anchoring agent into the borehole through the hollow supporting bolt through the grouting process;

[0030] Wherein, the r...

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Abstract

The invention belongs to the technical field of tunnel support and discloses an anchor injection support method based on the cracking suppression principle, which includes the following steps: placing a hollow support anchor in a borehole; and passing the hollow support anchor through a grouting process. The rod injects rock mass capsule anchoring agent into the borehole; wherein, the rock mass capsule anchoring agent includes: grouting material, repair capsule, water and necessary additives; the proportion of the grouting material, repair capsule and water It is 0.5:(0.01~0.15):1; the rock mass anchoring agent is filled between the hollow supporting anchor rod and the borehole and in the inner cavity of the hollow supporting anchor rod. The invention realizes secondary repair through capsule anchoring agent, which is efficient and convenient; it avoids the problems of secondary damage and rock mass cracking, and prevents the occurrence of rock burst disasters.

Description

technical field [0001] The invention relates to the technical field of geological roadway support, in particular to an anchoring and grouting support method based on the principle of cracking inhibition. Background technique [0002] After the surrounding rock is excavated, rock mass instability and damage are often induced, and even rock bursts are induced under certain conditions. Grouting and bolt support is a common form of surrounding rock support, which can significantly enhance the strength of surrounding rock. [0003] There are many kinds of grouting materials, which are mainly used to bond rock mass or as a bonding medium between anchor rod and rock mass during construction. During and after tunnel construction, due to the self-stress of the rock mass structure, the rod body is often stretched and deformed, and the surrounding rock and anchor body often undergo secondary cracking to varying degrees, and the anchor rod will yield in severe cases. Secondary repairs...

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): E21D20/02E21D21/00
CPCE21D20/021E21D20/025E21D21/0026
Inventor冯夏庭赵曰茂王兆丰刘继光
OwnerNORTHEASTERN UNIV LIAONING