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Road tunnel crossing inclined coal seam goaf ground pre-treatment method

A technology for road tunnels and goafs, applied in the field of ground pretreatment of goafs where road tunnels cross inclined coal seams, can solve the problems of narrow construction space, low drilling and grouting efficiency, etc., to ensure construction safety and eliminate potential safety hazards , The effect of facilitating grouting

Pending Publication Date: 2022-02-08
BEIJING CHINA COAL MINE ENG CO LTD
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AI Technical Summary

Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is to provide a ground pre-treatment method for road tunnels crossing inclined coal seam goafs, to solve the conventional method when tunnels pass through goafs: grouting and tunnel excavation intersecting operations cause both Mutual influence, as well as problems such as narrow construction space, low drilling and grouting efficiency during underground operations

Method used

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  • Road tunnel crossing inclined coal seam goaf ground pre-treatment method
  • Road tunnel crossing inclined coal seam goaf ground pre-treatment method
  • Road tunnel crossing inclined coal seam goaf ground pre-treatment method

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Embodiment Construction

[0040] In this embodiment, the tunnel section is a two-way road tunnel (such as figure 1 As shown in the engineering test point, according to the construction planning design, the highway tunnel cohables 10 layers of inclined coal seam taking space, and the method of inclined coal seams crossing the highway tunnel is taken as a surface prevention.

[0041] In this embodiment, the road tunnel transversely cuts the surface prevention method of tilt coal seam, including the following steps:

[0042] Step A: Exploring the vacuum area, determine the governance of the tilt area of ​​the tilt coal seam of 10; when determining the governance of the vacuum area 13, those skilled in the art can also combine the feature of override migration And engineering experience, comprehensively determine the scope of governance of the vacuum area; the scope of the governance area 13 includes a road tunnel under the road tunnel 9 and the upper vacuum area of ​​the highway tunnel 10;

[0043] The determ...

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Abstract

The invention discloses a road tunnel crossing inclined coal seam goaf ground pre-treatment method. The road tunnel crossing inclined coal seam goaf ground pre-treatment method comprises the following steps that A, a goaf is explored, and an inclined coal seam goaf treatment range is determined according to an exploration result; C, before tunnel excavation, directional branch grouting holes are formed according to a highway tunnel excavation route and the treatment range of the inclined coal seam goaf; C, drilling operation is conducted on the distributed directional branch grouting holes; and D, ground grouting is conducted through the drilled directional branch grouting holes so that the inclined coal seam goaf can be filled. The method is advantaged in that advantages of directional drilling and filling grouting technologies are combined, goaf residual cavities can be safely and rapidly filled, goaf underground water and harmful gas can be discharged, goaf residual deformation is eliminated, and tunnel construction safety is guaranteed.

Description

Technical field [0001] The present invention relates to a surface pre-treatment Field goaf. In particular to a highway tunnel across the pre-treatment method ground Coal Seam tilt. Background technique [0002] In recent years, the western region to speed up the traffic network construction, many are under construction or to be built across the mountain highway tunnel to be inclined Coal Seam. Because the mountains of southwest tilting Coal Seam distribution complex, the old empty area of ​​harmful gases, goaf water and other factors lead to a greater security threat to the mountain highway tunnel construction, and therefore to carry out highway tunnel across the mountain inclined Coal Seam pre-treatment, for Quick guide the construction of the western mountain tunnel safety is important. [0003] Currently, conventional tunnel through working out area treatment method mainly for advance pipe - shed Injecting Technique. This technique requires a hole in the tunnel work, construct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/14E21D9/00E21D11/10E21F15/00E21F17/00
CPCE21D9/14E21D9/001E21D11/10E21D9/002E21F15/005E21F17/00
Inventor 李生生梁敏陈振国李为琦周禹良贺文冯旭海吴莹刘星帅许慧斌安许良贺宏伟邵晨霞常若曦张宏发籍晓龙
Owner BEIJING CHINA COAL MINE ENG CO LTD
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