Support method for extra-thick broken coal seam employing nest anchored ropes

A bird's nest and anchor cable technology, which is applied in the direction of earthwork drilling, temporary shielding, bolt installation, etc., can solve the problems of lack of support and reinforcement methods, and achieve good support effects, reduced deformation, and good safety

Inactive Publication Date: 2012-10-17
DATONG COAL MINE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of the lack of support and reinforcement methods for roadways in extra-thick broken coal seams, the present invention provides a support method using "bird's nest" anchor cables for extra-thick broken coal seams

Method used

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  • Support method for extra-thick broken coal seam employing nest anchored ropes
  • Support method for extra-thick broken coal seam employing nest anchored ropes
  • Support method for extra-thick broken coal seam employing nest anchored ropes

Examples

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Embodiment Construction

[0012] The supporting method using "bird's nest" anchor cables for extra-thick broken coal seams includes the following steps: fixing several rows of anchor rods 2 on the roof, and each row of roof anchor rods includes four vertically arranged anchor rods in the middle and four anchor rods on both sides. Two inclined bolts are arranged inclined outward. The angle b between the inclined bolt of the roof and the vertical plane is 20°. The diameter of the roof bolt is 18mm and the length is 2200mm. The anchor rod spacing is 820mm, the row spacing of the roof anchor rods is 1000mm, W steel strips 4 are fixed at the lower end of each row of roof anchor rods, and a metal mesh 3 is fixed between every two adjacent W steel strips 4 and the top plate; Corresponding to the two gangs of the roof anchor rods, a row of anchor rods 2 is fixed respectively, and each row of anchor rods includes two anchor rods 2 arranged horizontally and an upwardly inclined anchor rod arranged on the upper si...

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Abstract

The invention relates to a support method for an extra-thick broken coal seam employing nest anchored ropes. The invention assists in solving a problem of lack of the support reinforcing method for an extra-thick broken coal seam tunnel. According to the invention, integrated combined support of anchor poles, nest anchored ropes, W steel bands and metal meshes is realized by utilizing preferable support parameters and adopting nest anchored ropes which are specially designed; a deformation degree of the super high breaking coal seam tunnel is substantially reduced; requirements for super high breaking coal seam roadway support are satisfied; safety of the super high breaking coal seam roadway is ensured; and production is guaranteed.

Description

technical field [0001] The invention relates to a supporting method for underground coal mines, in particular to a supporting method using "bird's nest" anchor cables for extra-thick broken coal seams. Background technique [0002] Bolt support can significantly improve the stability of surrounding rock, and has obvious technical and economic advantages compared with traditional shed support, so it has attracted much attention from the geotechnical engineering circles all over the world, and has been rapidly developed and widely used. . At present, bolt support has become a main development direction of roadway support. Due to the influence of magmatic rock intrusion, the mines of Carboniferous coal seams have large thickness and complex structure, showing the characteristics of soft coal seam and relatively broken coal body. Although the bolt support technology has been relatively mature, the problem of support and reinforcement for the roadway of extra-thick broken coal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D19/00E21D20/02E21D21/00
Inventor 吴永平刘锦荣王玉锦翟茂斌郭尚平牛福龙刘文康福钧朱兴基雷忠青
Owner DATONG COAL MINE GRP
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