Roadway grouting reinforcement method under dynamic load impact

Abstract

The invention provides a roadway grouting reinforcement method under dynamic load impact. The roadway grouting reinforcement method comprises the steps that roadway near-field surrounding rock is divided into an anchoring area and an anchoring outer area according to the breaking degree; and the anchoring area is grouted by adopting an elastic grouting material and / or an elastic and tough groutingmaterial through a partition independent grouting method or a same-hole step-by-step grouting method, and the anchoring outer area is grouted by adopting a foaming grouting material. According to theroadway grouting reinforcement method, grouting materials capable of reducing impact, absorbing energy and coordinating deformation with surrounding rock are adopted, grouting reinforcement is carried out according to the characteristics of the surrounding rock in different areas, the integrity of the surrounding rock can be kept, the self-bearing capacity of the surrounding rock is improved, deformation and energy absorption can be generated under the action of impact loads, coordinating deformation with the surrounding rock is achieved, bonding with a discontinuous surface is kept, continuous damage of impact to the integrity of the surrounding rock is reduced, the impact reduction and energy absorption characteristics of the surrounding rock are improved, the damage degree of the surrounding rock of the rock burst roadway is greatly reduced, and the catastrophe resistance under high-energy impact is improved.

Description

Technical field [0001] The present invention relates to the field of roadway construction technology, and more particularly to a method of grouting a driven load impact roadway. Background technique [0002] At present, some roadway surrounding rocks under the influence of impact ground pressure, strong dynamic pressure, are seriously damaged, especially if the helper coal body is shaped under the vibration of the dynamic load, the joint is opened, and the crack development is expanded. Surrounding rock integrity and carrying capacity have declined; and in general, the impact affects the degree of failure of the roadway and the range is greater than the static load without impact lane. If reinforcement measures are not taken, it will lead to exacerbation of roadway, and severe deformation may occur under continuous impact and even large-scale columns. [0003] In response to such lane, it should be taken in a timely reinforcement, restore the integrity and partial carrying capaci...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a roadway grouting reinforcement method impacted by dynamic load, which is used to solve the problem of poor deformation resistance and toughness of the reinforcement method in the prior art. Defects

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