High-pressure water-rich goaf grouting reinforcement method

A technology of grouting reinforcement and goaf, which is applied in construction, infrastructure engineering, soil protection, etc., to achieve the effect of low engineering investment, simple operation, and favorable deposition and consolidation

Active Publication Date: 2016-11-23
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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Problems solved by technology

[0003] The purpose of the present invention is to provide a high-pressure water-rich goaf grouting reinforcement method to solve the multiple deficiencies in the existing goaf grouting reinforcement construction technology, so that the high-pressure water-rich goaf grouting reinforcement construction is feasible, Fast and cost-effective construction

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] refer to figure 1 and figure 2 , the high-pressure water-rich goaf grouting reinforcement method of the present invention comprises the following steps:

[0019] 1) Divide an annular zone 10-20m outside the goaf reinforcement area, and use geological drilling rigs to drill 5-10 rows within the annular zone. The drilling depth reaches the top of the high-pressure water-rich goaf 4. The flexible grouting pipe 1, the explosive bundle 2, and the high-strength flexible grouting pipe 1 extend to the bottom of the high-pressure water-rich goaf 4;

[0020] 2) Within the scope of the goaf reinforcement area, use a geological drilling rig to drill holes to the top of the high-pressure water goaf 4 according to the design requirements, and extend the ordinary grouting pipe 3 into the high-pressure water-rich water goaf 4;

[0021] 3) Segmentally detonat...

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Abstract

Disclosed is a high-pressure water-rich goaf grouting reinforcement method. Through the high-pressure water-rich goaf grouting reinforcement method, many defects of existing goaf grouting reinforcement methods are overcome, so that high-pressure water-rich goaf grouting reinforcement construction is feasible and fast, and the construction cost is saved. According to the high-pressure water-rich goaf grouting reinforcement method, artificial explosion is used for forming goaf top plate caving zones, high-pressure grouting is adopted in the caving zones under the action of high-pressure water on the two sides for forming curtain reinforcement bodies, and the problem that curtains are difficult to be formed by grouting liquid in a high-pressure water-rich goaf is solved. Grouting reinforcement is started from the periphery to the inside of a goaf reinforcement area, the pressure influence of high-pressure water on the periphery of the goaf reinforcement area and non-section supplement of a water source can be reduced gradually, grouting holes are used for water pumping and drainage so that the pressure of the high-pressure water in the goaf can be reduced, thus the condition that each grouting hole adopts high pressure grouting can be avoided, meanwhile, deposition and solidification of the grouting liquid are facilitated, accordingly, the construction time is saved, and the construction cost is reduced.

Description

technical field [0001] The invention relates to geotechnical engineering, in particular to a grouting reinforcement method for high-pressure water-rich goafs. Background technique [0002] Coal mine goafs exist widely in my country. When the goaf is buried deep, it will usually form goaf water accumulation. When there is a source water level difference, there will even be a phenomenon of high pressure water, thus forming a high-pressure water-rich goaf. . When constructing engineering projects on the upper part of these goafs, when the deformation requirements are strict, effective measures must be taken to ensure the safety of the superstructure. At this time, the most effective and common method is to strengthen the gobs by grouting. However, due to the characteristics of high pressure and rich water in the goaf, the traditional grouting reinforcement construction technology is difficult to implement: high pressure water makes it difficult for the grouting liquid to enter,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/12
Inventor 姚裕春傅毅静李安洪魏永幸刘洋谭汉义袁碧玉
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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