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Rapid composite roof roadway support method for high-stress water guiding karst cave group

A composite roof, high stress technology, applied in mine roof supports, tunnels, earthwork drilling and other directions, can solve problems such as the failure of the support capacity to achieve the expected support effect, the normal construction of the roadway, and the excessive pressure of the surrounding rock. The installation process is convenient and quick, the maintenance works are reduced, and the supporting cost is saved.

Inactive Publication Date: 2015-05-06
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The support capacity of the existing support system cannot achieve the expected support effect under such complex geological conditions, and the phenomenon of excessive surrounding rock pressure and serious water gushing on the roof of the roadway makes the normal construction of the roadway impossible

Method used

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  • Rapid composite roof roadway support method for high-stress water guiding karst cave group
  • Rapid composite roof roadway support method for high-stress water guiding karst cave group

Examples

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Effect test

Embodiment 1

[0027] Implement a kind of fast supporting method for composite roof roadway of high-stress water-conducting karst cave group, and its described method is to carry out as follows:

[0028] Step 1. After the excavation of the roadway is formed, the side anchor rod 1 is driven into the two sides of the roadway for support, and the coal side is controlled first, and then the self-drilling arch foot grouting anchor is implanted in the roadway arch foot and vault 5 and self-drilling vault grouting bolts 6, with a row spacing of 1.0-1.5m.

[0029] This support method is due to the excavation of the roadway. The two arches and the top of the arch will produce stress concentration phenomena. The maximum stress at the two arches can reach 2 to 5 times the stress of the original rock. On the one hand, the pole can improve the bearing capacity of the rock mass at the vault and arch foot of the roadway, effectively control the slipping, instability and deformation of the rock mass at the ...

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Abstract

The invention provides a rapid composite roof roadway support method for a high-stress water guiding karst cave group. The rapid composite roof roadway support method comprises the steps that anchor rods are driven into the two sides of a roadway for support, self-drilling type grouted anchor rods are implanted into the arch springings and the vault of the roadway, rapid-hardening grouting materials are injected, and then a rapid roof reinforcing area is formed; secondly, profile steel is adopted, a roadway cross-section reinforcing support structure corresponding to the roadway roof anchor rod support is formed, and after jacking support is achieved through single hydraulic props, an arch supporting composite roof structure is formed through welding. By the adoption of the rapid composite roof roadway support method for the high-stress water guiding karst cave group, the composite roof of the high-stress karst cave group is effectively controlled, the maintenance work amount of roadways of the same type is greatly reduced, and coal mine production benefits and economic benefits are effectively improved.

Description

technical field [0001] The invention relates to a method for supporting a composite roof of a mine roadway, in particular to a method for supporting a composite roof of a roadway in a coal mine roadway in a high-stress area, and the roof of the roadway contains many karst cave groups. Background technique [0002] In recent years, with the continuous increase of mine mining depth, roadway mining activities are increasingly affected by high ground stress and various high-complex structural stresses, and the deformation and damage of mine roadway surrounding rocks are becoming more and more serious. Not only that, coal mines Due to the erosion of groundwater and magmatic rocks on the roof of the roadway, there are rock formation karst caves of different sizes, disorderly arrangement, and mutual conduction distributed in the roof rock layer, which are covered with a large amount of soft yellow mud and bowl-shaped rock hard cores, and above the roof of this type of roadway There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D20/00E21D23/04
CPCE21D20/021E21D11/18E21D11/183
Inventor 苏学贵李彦斌李本奎苏蕾原鸿鹄杜献杰杨宗一张锁
Owner TAIYUAN UNIV OF TECH
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