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A kind of expansive soft rock roadway grouting material

A grouting material and expansive technology are applied in the field of grouting material for expansive soft rock roadway, and the field of grouting and water blocking reinforcement of expansive soft rock roadway, which can solve the problem of lack of grouting material and poor reinforcement effect in expansive soft rock roadway. , roadway damage and other problems, to achieve the effect of improving the water blocking performance of reinforcement, good impermeability and durability, and high strength in the early and late stages

Inactive Publication Date: 2020-07-31
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many types of grouting materials at present, there is no suitable grouting material for expansive soft rock roadways
[0004] Because the surrounding rock of expansive soft rock roadway has the characteristics of easy expansion and disintegration when exposed to water, the reinforcement effect of ordinary cement slurry on this kind of roadway is poor, and it will even aggravate the damage of the roadway

Method used

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  • A kind of expansive soft rock roadway grouting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] An expansive soft rock roadway grouting material, which consists of a matrix component and an external component, the matrix component includes ultra-fine cement, fly ash, silica fume, and the external component includes a high-efficiency water reducer and a clay stabilizer , the matrix components are proportioned by mass percentage: superfine cement 75%, fly ash 15%, silica fume 10%, the external components are proportioned by mass percentage: high-efficiency water reducer is 1.0% of the total mass of matrix components , The clay stabilizer is 1.0% of the total mass of the matrix components.

[0019] The average particle size of ultrafine cement is 2 μm, and the maximum particle size is less than 20 μm.

[0020] Fly ash is ultra-fine fly ash with an average particle size of 3 μm and a maximum particle size of less than 5 μm.

[0021] The average particle size of silicon powder is 0.5 μm, and the maximum particle size is less than 1 μm.

[0022] The high-efficiency wa...

Embodiment 2

[0026] An expansive soft rock roadway grouting material, which consists of a matrix component and an external component, the matrix component includes ultra-fine cement, fly ash, silica fume, and the external component includes a high-efficiency water reducer and a clay stabilizer , the matrix components are proportioned by mass percentage: superfine cement 70%, fly ash 20%, silica fume 10%, the external components are proportioned by mass percentage: high-efficiency water reducer is 1.2% of the total mass of matrix components , The clay stabilizer is 2.0% of the total mass of the matrix components.

[0027] The average particle size of ultrafine cement is 2 μm, and the maximum particle size is less than 20 μm.

[0028] Fly ash is ultra-fine fly ash with an average particle size of 3 μm and a maximum particle size of less than 5 μm.

[0029] The average particle size of silicon powder is 0.5 μm, and the maximum particle size is less than 1 μm.

[0030] The high-efficiency wa...

Embodiment 3

[0034] An expansive soft rock roadway grouting material, which consists of a matrix component and an external component, the matrix component includes ultra-fine cement, fly ash, silica fume, and the external component includes a high-efficiency water reducer and a clay stabilizer , the matrix components are proportioned by mass percentage: ultra-fine cement 80%, fly ash 15%, silica fume 5%, and the external components are proportioned by mass percentage: high-efficiency water reducer is 1.5% of the total mass of matrix components , The clay stabilizer is 3.0% of the total mass of the matrix components.

[0035] The average particle size of ultrafine cement is 2 μm, and the maximum particle size is less than 20 μm.

[0036] Fly ash is ultra-fine fly ash with an average particle size of 3 μm and a maximum particle size of less than 5 μm.

[0037] The average particle size of silicon powder is 0.5 μm, and the maximum particle size is less than 1 μm.

[0038] The high-efficienc...

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Abstract

The invention discloses an expansive soft rock roadway grouting material. The grouting material is composed of a matrix component and an external component, the matrix component includes ultrafine cement, fly ash, and silicon powder, and the external component includes High-efficiency water reducer, clay stabilizer, matrix components proportioned by mass percentage: superfine cement 70-80%, fly ash 15-20%, silica fume 5-10%, external components proportioned by mass percentage : The high-efficiency water reducer is 1.0-1.5% of the total mass of the matrix components, and the clay stabilizer is 1.0-3.0% of the total mass of the matrix components. The grout made of this grouting material has good fluidity and stability, high early and late strength, good impermeability and durability, and can inhibit the deformation caused by the expansion of surrounding rock during the grouting process of expansive soft rock roadway, avoiding the deformation caused by grout injection. The closure of surrounding rock cracks can significantly improve the injectability and water blocking and reinforcement performance of expansive soft rock roadway surrounding rock cracks after application.

Description

technical field [0001] The invention relates to the technical field of underground engineering safety, in particular, to an expansive soft rock roadway grouting material, which is mainly used for grouting and water blocking reinforcement in soft rock roadways and other underground engineering fields, and is especially suitable for expansion Grouting and water blocking reinforcement of soft rock roadway. Background technique [0002] With the increase of coal mining depth, the number of soft rock roadways is also increasing. Many coal mines in my country have encountered soft rock disasters to varying degrees, and the support problem of expansive soft rock roadways is particularly prominent. This kind of soft rock roadway surrounding rock contains a large amount of expansive clay minerals. When the clay minerals come into contact with water, the water can enter between the mineral crystal layers, and the cations on the surface of the crystal layers dissociate and diffuse in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B20/00E21D11/10
CPCC04B20/008C04B28/00C04B2201/50E21D9/002E21D11/10C04B18/08C04B18/146C04B24/24C04B22/124C04B2103/0068
Inventor 乔卫国张帅宋伟杰
Owner SHANDONG UNIV OF SCI & TECH
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