Progressive shielding booster-type grouting and reinforcing technology for baseboard

A technology of grouting reinforcement and floor plate, applied in wellbore lining, tunnel lining, underground chamber, etc., can solve the problems of collapsed hole, poor hole quality of floor drilling, sludge, etc., to improve integrity and facilitate maintenance. , the effect of reducing erosion

Inactive Publication Date: 2011-11-02
CHINA UNIV OF MINING & TECH
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Problems solved by technology

However, when the content of clay minerals such as kaolinite, montmorillonite, illite, and illite in the surrounding rock of the roadway is relatively high, and the mudstone on the floor is severely muddy after contact with water, or the roadway is in a geological anomaly zone, weak and broken, The bottom plate is broken, and the quality of drilling holes in the bottom plate is poor. After the drill pipe is withdrawn, only the shallow part of the roadway bottom plate is drilled with g

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  • Progressive shielding booster-type grouting and reinforcing technology for baseboard
  • Progressive shielding booster-type grouting and reinforcing technology for baseboard

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Embodiment Construction

[0016] In the accompanying drawings, the operation steps of this kind of base plate progressive cover pressurized grouting reinforcement technology are as follows:

[0017] ①Construction floor: construct a 0.2m thick concrete floor (2) on the floor of the roadway (1) to provide a grout-stop layer for the bottom plate of the roadway (1);

[0018] ②Shallow hole grouting: After the concrete floor (2) is solidified, shallow grouting holes (4) in the bottom plate of the roadway (1) with a depth of 1.5-2.5m are constructed, and the spacing between the holes is 1.5m-3.0m. Then install a shallow hole grouting pipe (3) in the hole, and seal the hole with rapid hardening cement, a hole sealer, etc. After the hole sealing is completed, it is grouted. When the grouting pressure reaches 1.0-2.0Mpa, the pressure is stabilized Stop grouting after 3 to 5 minutes;

[0019] ③Medium and deep hole grouting: After the shallow hole grouting is completed, the middle and deep grouting holes (7) with...

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Abstract

The invention relates to a progressive shielding booster-type grouting and reinforcing technology for a baseboard, aiming at the problems of weak and muddy roadway baseboard drilling construction and bottom heave control. The baseboard grouting depth is successively increased from a shallow part, a middle deep part and a deep part; shallow part grouting forms a shielding grout stopping layer to protect middle deep part grouting; the middle deep part grouting forms a shielding grout stopping layer to protect deep part grouting; after grouting, the integrity of a country rock within the grouting range is improved; and the problem of hole collapse for drilling in the subsequent grouting can be solved so as to realize the purposes of continuously increasing the grouting depth and the groutingpressure of a roadway baseboard. With the method, the geologic anomaly zone and the weak and muddy roadway baseboard can be effectively reinforced, the bottom heave speed is lowered, and the roadway bottom heave is controlled.

Description

technical field [0001] The invention relates to the treatment and reinforcement technology of the bottom plate of coal mine roadway, in particular to a progressively shielding pressurized grouting reinforcement technology for the bottom plate. Background technique [0002] The roadway floor heave problem is common in coal mine roadways. At present, domestic and foreign methods and technologies to control the floor heave or reduce the volume of the floor heave include pressure relief to improve the stress state of the surrounding rock of the floor and reinforcement to improve the strength of the surrounding rock of the floor. Protection method, full-section support method such as concrete slabs and arc slabs, construction floor anchor method, floor grouting method, bottom slab vertical groove prevention method, bottom slab excavation roadway pressure relief method on both sides of the floor, loosening the two bottom corners of the floor roadway The blasting method and the me...

Claims

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Application Information

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IPC IPC(8): E21D11/10
Inventor 阚甲广张农陈威郑西贵钱德雨
Owner CHINA UNIV OF MINING & TECH
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