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Grouting reinforcing method for deep surrounding rock crushing water erosion roadway

A grouting reinforcement and surrounding rock technology, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve problems such as low safety, support failure, and increased repair costs, and achieve enhanced support effects and internal Friction, the effect of inhibiting the loosening and slipping of surrounding rock

Inactive Publication Date: 2020-08-28
GUIZHOU PANJIANG REFINED COAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One problem with these supports is that the support will fail for water-drenched roadways or roadways with high mine pressure, resulting in the need to repair the roadway repeatedly, resulting in increased repair costs, and at the same time, the safety is not very high.

Method used

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  • Grouting reinforcing method for deep surrounding rock crushing water erosion roadway
  • Grouting reinforcing method for deep surrounding rock crushing water erosion roadway
  • Grouting reinforcing method for deep surrounding rock crushing water erosion roadway

Examples

Experimental program
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Embodiment 1

[0030] Embodiment 1: as attached Figure 1-7 As shown, a grouting reinforcement method for deep surrounding rock broken and water-eroded roadway, the method includes the following steps: 1. Filling and sealing the roof caving area of ​​the existing head-on roof; 3. Advance grouting and water blocking reinforcement to the broken roof in the pre-excavation area.

[0031] In step 1, in the roof-caving area, use 4-point seamless steel pipes to insert evenly into the roof-caving area according to the site conditions, and the slurry outlet of the intubation pipe is located at the top of the roof-caving area. Intubation instructions are attached figure 1 As shown, the filling effect is shown in the attached figure 2 shown.

[0032] In step 2, for the broken surrounding rock close to the head-on roof, arrange a row of fan-shaped grouting holes with matching lengths, wherein the long hole is 3 meters, the short hole is 1.5 meters, and the hole angle is perpendicular to the roadway ...

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Abstract

The invention discloses a grouting reinforcing method for a deep surrounding rock crushing water erosion roadway. The method comprises the following steps: I, filling and plugging an existing head-ontop plate roof zone; II, and performing grouting, water-plugging and reinforcing on existing head-on top plate crushed surrounding rocks; and III, performing advanced grouting, water-plugging and reinforcing on a pre-headed area crushing top plate. A high-molecular chemical material is injected for coagulating an original crushed rock body, and cracks are closed by hydrophobicity and expansibilityof the high-molecular material, so that the surrounding rocks of a roadway top plate are restrained from loosening and sliding, and therefore, internal friction force of the surrounding rocks is strengthened; and cohesive force effect of the high-molecular material is added, so that the supporting effect of the roadway is strengthened, and therefore, heading speed of the roadway is increased while use safety of the roadway is improved.

Description

technical field [0001] The invention relates to a roadway support and reinforcement method, in particular to a grouting reinforcement method for broken and water-eroded roadways in deep surrounding rocks, and belongs to the technical field of coal mine support. Background technique [0002] Aiming at the technical requirements for pre-penetrating the goaf of the working face during the excavation of the return air inclined roadway in the coal mine, the surrounding rock of the roadway is broken during the penetration period, which may easily cause the roof of the roadway to leak, form the roof fall area and the water gushing channel, and bring more difficult technical requirements to the roadway support For the above situation, in the past, gold U sheds were often used to reinforce and support the water-drenched roadways, and the anchor cable density and anchor cable penetration depth were often used to strengthen the support for the non-sprayed position of the fork. One prob...

Claims

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Application Information

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IPC IPC(8): E21D11/10E21D11/38E21D9/10E21F15/06
CPCE21D9/10E21D11/105E21D11/38E21F15/06
Inventor 秦振东余富佳李宏伟曾勇李伟尚松芳党兴国
Owner GUIZHOU PANJIANG REFINED COAL
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