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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 tunnels and coal mine structures, and the pre-excavation area is not supported in advance, the present invention Provide a method for rapid passage of grouting in the advanced dense top protection layer in the loose slip area

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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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Embodiment Construction

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0031] A method for rapid passage of grouting in an advanced dense roof protection layer in a loose slip area, comprising the following steps:

[0032] S1: Utilize geological exploration, underground pit penetration, and drilling methods, combined with the actual data of underground engineering to analyze and determine the structural scope and shape of the loose slip zone on the roadway working face. The structural state of the loose slip zone on the roadway wo...

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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
CPCY02E10/20
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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