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A kind of pre-empty soft rock roadway support structure and construction method thereof

A technology for roadway support and roadway is applied in the support structure of pre-empty soft rock roadway and its construction field. The effect of protecting the strength and reducing the difficulty of laying

Active Publication Date: 2022-08-05
HUATING COAL GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The two bottom corners of the U-shaped support frame widely used in traditional support structures are the intersection point of stress transmission, the sensitive area for sharp corner effect and the foothold of the roadway support surrounding rock vector, which is prone to stress concentration and helps The deformation of the bottom corner of the wall will accelerate the destruction of the roadway and fail to achieve the ideal support effect

Method used

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  • A kind of pre-empty soft rock roadway support structure and construction method thereof
  • A kind of pre-empty soft rock roadway support structure and construction method thereof
  • A kind of pre-empty soft rock roadway support structure and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0035] The steel arch (2) is the rail steel structure; compared with the steel structure of the type, the rail steel support has higher intensity.

[0036] The number of V -shaped frames (4) is the same as the number of steel arch (2). The V -type frame (4) consists of two cross -vertical steels that cross each other. For the middle end of the V -type frame (4); the V -rack (4) can be subject to the steel arch of the steel arch (2) caused by the pressure below and the undergoing gang of the roadway. The bottom angle moves outward.

Embodiment 3

[0038] The bottom angle of the V -rack (4) is welded in both ends of the steel arch (2), which is welded in two steel welding in the V -rack (4).

Embodiment 4

[0040] The two ends of the V -rack (4) are fixed to the bottom angle of the steel arch (2) through the bolt. The connection intensity of the arched (2) and V -rack (4), thereby enhancing the support strength of the roadway (1).

[0041] The W -shaped steel belt installed by multiple sections of the upper and lower intervals of the wall of the lane roads (13) is installed. The side fixation is set with a convex block structure installed in the connection board (13) groove; connecting board (13) composed of multiple W -shaped steel bands can increase the support of the support wall, and the other is the other, and the other is another Aspects can also connect the multi -prestressed anchor (9) to further improve the strength of the support.

[0042] The side side of the steel arch (2) of the connection board (13) is the outer side of the steel arch (2). Effectively use the bottom angle space of steel arch (2), and reduce the difficulty of laying the pipeline system and power cable sy...

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Abstract

The invention belongs to the technical field of soft rock roadway support, and in particular relates to a pre-empty soft rock roadway support structure and a construction method thereof. The bottom corner is provided with a bottom corner pressure relief groove, the bottom end of the steel arch frame and the two ends of the V-shaped frame are set in the bottom corner pressure relief groove, the middle end of the V-shaped frame is set in the reinforcement groove, and the grouting is provided on the surrounding rock surface of the roadway. The prestressed anchor rod and the anchor cable are fixedly installed in the layer. The inner side of the wire rope net attached to the prestressed anchor rod and the anchor cable is sprayed with a concrete seal layer. The gas-water pipeline system and power cable system are installed between the cover plate and the connecting plate. The approximately triangular support surface composed of steel arches and V-frames has good force balance and strong support for surrounding rocks. The connecting plate and cover plate opened by the tool can safely and effectively utilize the bottom corner space of the steel arch, reducing the difficulty of laying pipelines and power cables.

Description

Technical field [0001] The present invention belongs to the field of soft rock lane support technology, which involves a premium soft rock lane support structure and its construction method. Background technique [0002] With the expansion of coal mine mining, the depth of mining has continued to increase, and the mining conditions are becoming more and more difficult, especially the stacking pressure brought by the inflation of weak rock coal body under the stress of complex structures, and patching stress. It is a problem that plagues the support of coal mine lanes. Because of the difference in time and slow time, the difference between the size and direction of the force, there is a combination of stacking pressure that is uneven and uneven. Under this uneven superposition pressure, the lane lane support will be repeatedly destroyed, and the conventional support technology is difficult to ensure the stability of the lane lane. The unstable protection of the lane roads affects ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/00E21D11/10E21D11/20E21D20/00E21F17/02H02G9/08
CPCE21D11/006E21D11/10E21D11/107E21D11/20E21D20/00E21F17/02H02G9/08
Inventor 许强李明远吴军马进生田斌李鹏赵凤李小刚赵辉强莫正虎胡长岭
Owner HUATING COAL GRP
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