Ground pre-grouting strengthening technology for deep long-distance roadway surrounding rock

Abstract

The invention discloses a ground pre-grouting construction technology suitable for strengthening deep long-distance roadway surrounding rock, and particularly relates to a ground pre-grouting strengthening technology for deep long-distance roadway surrounding rock. The ground pre-grouting strengthening technology for the deep long-distance roadway surrounding rock includes the following steps that firstly, a ground grouting drill hole is formed in the ground through a drilling machine, the ground grouting drill hole comprises a casing pipe segment, a deflecting segment and a horizontal strengthening segment, a casing pipe segment drill hole is internally provided with a casing pipe, the deflecting segment and the horizontal strengthening segment are provided with rock open holes, and ground inlets of the ground grouting drill hole are formed in the walking direction of a roadway; secondly, grout is injected into a stratum rock body where the horizontal strengthening segment exists through a grouting pump located on the ground, and beforehand strengthening government of the roadway surrounding rock is achieved. According to the ground pre-grouting construction technology for strengthening the deep long-distance roadway surrounding rock, strengthening and grouting of the whole roadway surrounding rock can be achieved, and the ground pre-grouting construction technology is suitable for active strengthening of the coal mine large-range roadway surrounding rock and is high in safety and adaptability.

Description

technical field [0001] The invention relates to the field of roadway surrounding rock reinforcement in coal mine construction, in particular to a roadway surrounding rock reinforcement construction technology suitable for formations with long roadway distance, deep burial and poor surrounding rock stability. Background technique [0002] With the depletion of shallow coal resources, the mining of deep coal resources is becoming more and more common. However, the deep coal-measure strata are greatly affected by unpredictable factors such as complex geological conditions and high ground pressure. During the excavation process of underground roadways, they face construction risks such as sidewalls, falling blocks, and development of fissure water-conducting channels. Moreover, After the roadway is completed, damages such as excessive ground deformation of the surrounding rock, failure of support methods, and late water gushing will also occur. Therefore, the research on reinfo...

AI Technical Summary

Problems solved by technology

Disadvantages: ①During grouting construction, the excavation process of the working face is completely stopped. If the cracks are very developed, it is necessary to construct a grout stop pad or a grout stop wall, resulting in a very low roadway excavation efficiency; ②The depth of the grouting drilling is shallow and the reinforcement range It is very small, and at the same time, the space of the working face is limited, and large-scale equipment cannot be used, the grouting pressure is small, and the grout diffusion distance is limited; ③Reinforcement grout is mainly chemical grout, which is costly and is not conducive to environmental protection

④The working environment at the construction site is poor and there are many unsafe hidden dangers

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