Curtain grouting construction method for treating mined-out areas

A goaf treatment and curtain grouting technology, which is applied to mining equipment, earthwork drilling, filling, etc., can solve high safety requirements and achieve the effect of reducing raw material costs

Active Publication Date: 2014-02-26
GEZHOUBA GROUP FOUND ENG
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  • Claims
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AI Technical Summary

Problems solved by technology

The Middle Route Project of South-to-North Water Diversion Project is a large-scale water conservancy project with high safety requirements

Method used

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  • Curtain grouting construction method for treating mined-out areas

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Embodiment Construction

[0042] A construction method for treating curtain grouting in gobs, the method is composed of the following steps:

[0043] 1) Construction preparation before drilling, the preparation work is as follows:

[0044] 1-1) Construction platform: Channel steel or I-steel welding is used to form a construction platform with a large support surface, and it is connected with the overall bolt of the drilling rig frame to ensure the construction stability requirements during high mast operations.

[0045] 1-2) Drilling equipment configuration: The burial depth of coal mine goaf is generally large and the stratum is complex, so the rotary drilling rig or down-the-hole drilling rig with a power of more than 11KW and a torque of not less than 1110N.m is generally used for drilling.

[0046] 1-3) Drilling equipment: according to the different lithological characteristics of the overburden (loam layer, pebble layer, bedrock section, etc.) The drill pipes are selected according to the actual...

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Abstract

The invention discloses a curtain grouting construction method for treating mined-out areas. The curtain grouting construction method includes steps of 1), preparing for construction before drilling; 2), forming curtain grouting holes at boundaries of treatment ranges of the mined-out areas; 3), drilling covering layers and bedrock sections of the mined-out areas; 4), washing drilled holes in the mined-out areas; 5), performing curtain grouting treatment on the mined-out areas by the aid of the drilled holes and performing curtain grouting by the aid of different types of slurry according to conditions of leaking quantities of the drilled holes; 6), inspecting the grouting quality. The curtain grouting construction method for treating the mined-out areas has the advantages that a ground drilling grouting mode is adopted for the boundaries of the treatment ranges of the mined-out areas, so that closed grout stopping curtains with certain strength can be formed, the curtain grouting quantities and curtain grouting diffusion ranges can be effectively controlled, the curtain pack densification and the gravel strength can be greatly improved, problems in the aspect of closing and grout stopping for boundaries of mined-out areas can be solved, and engineering investment can be saved.

Description

technical field [0001] The invention relates to a construction method for treating curtain grouting in goafs, and belongs to the field of foundation treatment and geological disaster control of water conservancy projects and corresponding projects. Background technique [0002] With the vigorous development of the country's infrastructure, the site selection and geological conditions of the project are becoming more and more complex, and a large number of mineral mining has made the area of ​​the underground goaf larger and larger. However, a series of environmental geotechnical engineering geological problems caused by the collapse of the goaf, such as ground subsidence, road cracks, and reduction of cultivated land, often seriously affect the normal life of the people and cause major economic losses. [0003] At home and abroad, there is very little experience in building projects on gobs, especially water conservancy projects. There is no mature construction experience, a...

Claims

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Application Information

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IPC IPC(8): E21F15/08
Inventor 朱品安周兵石艳军童耀张栋
Owner GEZHOUBA GROUP FOUND ENG
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