A kind of support method of semi-closed reinforced concrete segment in deep coal mine

A reinforced concrete pipe and semi-closed technology, which is applied in the direction of earth drilling, mining equipment, shaft lining, etc., can solve the problems of high repair rate and difficult roadway support, and achieve long-term stability, avoid repeated repairs, and reduce costs Effect

Active Publication Date: 2018-05-25
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of difficult support and high repair rate in the roadway of the soft broken bottom drum, and design a closed-loop support structure of the semi-closed reinforced concrete segment of the roadway

Method used

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  • A kind of support method of semi-closed reinforced concrete segment in deep coal mine
  • A kind of support method of semi-closed reinforced concrete segment in deep coal mine
  • A kind of support method of semi-closed reinforced concrete segment in deep coal mine

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] (1) Excavating coal lanes. Excavation is formed according to the design gross cross-section size, and the shape of the wellbore cross-section is horseshoe-shaped. Try to make the surface of the roadway as flat and smooth as possible, and avoid unevenness, so as to create good conditions for the installation of semi-closed prefabricated reinforced concrete segment support components.

[0026] (2) Splicing of reinforced concrete segments. After the roadway is excavated, the anti-arch (1) and column (5) are first laid, the beam (2) and the axial beam (7) are erected, and then the prefabricated reinforced concrete cover plate (8) is laid, and after the cover plate is laid, erect Two gangs of prefabricated reinforced concrete segments (4) and a roof prefabricated concrete segment (3).

[0027] (3) Lag grouting reinforcement. After the prefabricate...

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Abstract

The patent of the invention belongs to the field of mine disaster prevention and control, and specifically relates to a method for controlling severe deformation of soft and broken floor drum roadways through closed-loop grouting support of prefabricated reinforced concrete segments. The support structure can form a closed-loop structure, and convert the extrusion force generated by the deformation of surrounding rock into the hoop stress of the support structure. Delayed grouting can fill the pores between the concrete segment and the surrounding rock while strengthening the shallow surrounding rock, so as to avoid local stress concentration and damage. This support technology can realize the support mechanism of the new Austrian method in the tunnel construction on the basis of ensuring the timely support of the roof in the coal mine regulations, that is, the surrounding rock is allowed to have a certain deformation in the initial stage, and when the deformation reaches a certain level, the prefabricated steel bars The concrete segments play a supporting role, and the supporting force increases as the deformation increases until the surrounding rock reaches a new equilibrium state. The bottom plate adopts a semi-closed anti-arch design, which is conducive to the release of energy in the bottom drum roadway, avoids repeated repairs, and greatly reduces costs.

Description

technical field [0001] The patent of the invention belongs to the field of mine disaster prevention, and specifically relates to a method for controlling the long-term continuous serious deformation of the soft broken bottom drum roadway of coal mines through closed-loop grouting support of prefabricated reinforced concrete segments. Background technique [0002] At present, with the development of coal mining to the deep, the in-situ stress environment of the roadway is becoming more and more complex, especially in the area near the geological structure, the surrounding rock is soft and broken, and the conventional support form is difficult to control the deformation and failure of the surrounding rock of the roadway in this area. Mining has brought great difficulties. If it is not handled properly, it will cause accidents such as underground roof fall and collapse, and may cause casualties, which greatly increases the construction cost. Therefore, active and passive combin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/08E21D20/02
Inventor 左建平孙运江吴迪
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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