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Mud rock grouting material

A grouting material, mudstone technology, applied in the field of mudstone grouting materials, can solve the problems of low mechanical strength, polluting the environment, foaming when encountering water, etc., and achieve the effect of high strength, low viscosity and strong permeability of solidified body

Active Publication Date: 2018-11-23
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although polyurethane grouting materials have the advantages of strong permeability and high mechanical properties, they have problems such as foaming when exposed to water, flammability, high price, polluting the environment, and easy aging.
Although water glass grouting materials have the advantages of good permeability and low cost, their low mechanical strength limits their use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A mudstone grouting material, which is made of water glass as the main ingredient, with a curing agent and a modifier as auxiliary agents, and is prepared in the following proportions by weight:

[0025] Water glass 85 parts

[0026] Modifier 7 parts

[0027] Curing agent 8 parts

[0028] The modulus of above-mentioned water glass is 3.0, and curing agent is ethyl acetate.

[0029] Modifiers are made by the following methods:

[0030] (1) Using anthracite as a carbon source, the arc discharge method is used to prepare coal-based carbon nanotubes, and other embodiments are the same as this step;

[0031] Crush the anthracite to a particle size below 140 mesh, dry it at 110°C for 1 hour, mix it with coal tar at a mass ratio of 10:3, mold it under a pressure of 10MPa to make a coal rod with a diameter of 10mm, put it into a tube furnace and use it Nitrogen protection, carbonization at 900°C for 2h with a temperature program of 3°C / min, and natural cooling to room tempe...

Embodiment 2

[0038] A mudstone grouting material, which is made of water glass as the main ingredient, with a curing agent and a modifier as auxiliary agents, and is prepared in the following proportions by weight:

[0039] Water glass 70 parts

[0040] Modifier 15 parts

[0041] Curing agent 15 parts

[0042] The modulus of the above-mentioned water glass is 3.2, and the curing agent is glyceryl triacetate.

[0043] Modifiers are made by the following methods:

[0044] (1) Using anthracite as carbon source, coal-based carbon nanotubes were prepared by arc discharge method;

[0045] (2) Using concentrated HNO 3 / Concentrated H 2 SO 4 Coal-based carbon nanotubes are oxidized with a mixed acid with a volume ratio of 1:1 to obtain hydroxylated coal-based carbon nanotubes;

[0046] (3) Add 3 parts of catalyst and 20 parts of hydroxylated coal-based carbon nanotubes prepared in step (2) to 55 parts of toluene diisocyanate, and react for 1 hour to obtain isocyanate-treated coal-based car...

Embodiment 3

[0051] A mudstone grouting material, which is made of water glass as the main ingredient, with a curing agent and a modifier as auxiliary agents, and is prepared in the following proportions by weight:

[0052] Water glass 80 parts

[0053] Modifier 10 parts

[0054] Curing agent 10 parts

[0055] The modulus of above-mentioned water glass is 2.9, and curing agent is ethyl acetate.

[0056] Modifiers are made by the following methods:

[0057] (1) Using anthracite as carbon source, coal-based carbon nanotubes were prepared by arc discharge method;

[0058] (2) Using concentrated HNO 3 / Concentrated H 2 SO 4 Coal-based carbon nanotubes are oxidized with a mixed acid with a volume ratio of 1:1 to obtain hydroxylated coal-based carbon nanotubes;

[0059] (3) Add 2 parts of catalyst and 20 parts of hydroxylated coal-based carbon nanotubes prepared in step (2) to 55 parts of toluene diisocyanate, and react for 1 hour to obtain isocyanate-treated coal-based carbon nanotubes;...

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Abstract

The invention relates to the field of grouting materials for mining, in particular to a mud rock grouting material. The mud rock grouting material adopts sodium silicate as a main material and a curing agent and a modifying agent as assistants, and is prepared from the following raw materials in parts by weight: 70 to 90 parts of the sodium silicate, 5 to 20 parts of the modifying agent and 5 to 15 parts of the curing agent. A sodium silicate grouting material disclosed by the invention has the advantages of good permeability, high curing strength, no toxicity, low cost and the like; a uniformand stable mixed solution can be formed by the self-made modifying agent of a linear molecular structure and the sodium silicate, so that not only a fiber reinforcement function can be achieved, butalso the mixed solution can be organically combined with the sodium silicate to form a cross-linked net structure, and the mechanical performance of the sodium silicate grouting material can be further increased.

Description

technical field [0001] The invention belongs to the technical field of mine grouting materials, in particular to a mudstone grouting material. Background technique [0002] With the continuous increase of the mining depth of the mine, problems such as strong mine pressure and difficult maintenance gradually appear in the mine. Especially in underground wells with a depth of 1,000 meters, under the superimposed action of high ground stress and strong mining, rock mass breakage and crack closure will occur in mudstone. Granular grouting materials such as cement slurry and clay cement slurry are difficult to penetrate into the tiny cracks in mudstone. The ideal grouting reinforcement effect cannot be achieved. Chemical grouting materials have attracted widespread attention due to their good permeability. At present, the chemical grouting materials commonly used in coal mines are mainly polyurethane and water glass grouting materials. Although polyurethane grouting materials ...

Claims

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Application Information

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IPC IPC(8): C04B28/26C04B111/70
CPCC04B28/26C04B2111/00025C04B2111/00724C04B2111/70C04B2201/50C04B24/045C04B22/02C04B22/085C04B22/141C04B24/12C04B24/121
Inventor 杨政鹏帅波陈小砖张雪峰张春静张海波管学茂
Owner HENAN POLYTECHNIC UNIV
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