Method for grouting and fast passing of advanced dense roof protection layer in loose slippage area

A roof protection and loose technology, applied in earthwork drilling, wellbore lining, tunnel lining, etc., can solve problems such as grouting slurry penetration, advance support in pre-excavation areas, etc., to increase stability and bearing capacity, and improve rock mass The effect of mechanical properties

Pending Publication Date: 2022-04-08
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0004] In order to solve the problem that the grouting slurry permeates into the pre-excavation area when the traditional advance grouting method is used for loose and slippery rock strata during the construction of tunne

Method used

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  • Method for grouting and fast passing of advanced dense roof protection layer in loose slippage area
  • Method for grouting and fast passing of advanced dense roof protection layer in loose slippage area
  • Method for grouting and fast passing of advanced dense roof protection layer in loose slippage area

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[0030] Next, the technical solutions in the embodiments of the present invention will be described in connection with the drawings of the embodiments of the present invention, and it is understood that the described embodiments are merely the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art are in the range of the present invention without making creative labor premise.

[0031] Method for rapid passing of a loose slip region super-intensive roof-proof roof layer, including the following steps:

[0032] S1: Utilizing geological exploration, underground pothography, drilling method, combined with the actual data analysis of the underground engineering, determined the scope and form of the pine sliding area of ​​the excavation work, the urging work surface is loose slipping area figure 1 Indicated;

[0033] S2: Along the direction of the relevance,...

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Abstract

The invention discloses a method for grouting and fast passing of an advanced dense roof protection layer in a loose slippage area. The method comprises the steps that S1, the construction range and form of the loose slippage area in front of entry driving are ascertained; s2, determining the construction position of a first-round advanced dense roof protection layer; s3, advanced dense roof protection drill holes are constructed in the roadway driving roof, and I-shaped steel is installed; s4, grouting drill holes are constructed, and grouting is conducted; s5, tunneling to a roof protection position of the next cycle; and S6, the steps of roof protection and grouting are repeated till the roadway driving working face completely passes through the loose slippage area. Advanced roof protection supporting of the roadway in the loose slippage area is achieved, the problem that grout seeps into the tunneling range of the working face when the top plate of the pre-tunneled roadway of the tunneling working face is pre-grouted is solved, advanced grouting grout is controlled to be above a dense roof protection layer, and the purpose that roadway driving rapidly passes through the loose slippage area is achieved.

Description

technical field [0001] The invention relates to the technical field of construction in tunnels and coal mine structure areas, in particular to a method for rapid passage of grouting in advance dense top protection layers in loose slip areas. Background technique [0002] Coal mining is generally divided into underground mining and open pit mining. When the coal seam is buried below the surface, the coal seam is usually excavated by digging a roadway underground. When tunneling tunnels during underground coal mining, special geological structural fracture zones such as faults, folds, and loose rock strata will inevitably be encountered. help, and even lead to safety accidents during excavation. [0003] When encountering a special geological structural fracture zone such as loose and slippery rock formations, the traditional treatment process includes passive treatment methods such as lowering the mining height, laying metal support nets, installing temporary supports, and ...

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Application Information

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IPC IPC(8): E21D11/10E21D11/15E21D9/04
Inventor 张晓悟张皓文徐金海曹悦王琪孙垒黄宁
Owner CHINA UNIV OF MINING & TECH
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