A self-healing plugging material for regenerative roof and its preparation method

A technology of plugging materials and regenerated roofs, which is applied in shaft equipment, mining equipment, earthwork drilling and mining, etc., to achieve the effects of enhancing water retention capacity, preventing expansion and deformation, and increasing strength and flexibility

Active Publication Date: 2022-05-03
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing prevention and control materials all reinforce the roof at one time, without considering that the stress field of the coal rock continues to change when the roof continues to advance in the coal mining face. When the strength of the prevention and control materials cannot withstand the stress field, it will be Broken again with the top plate

Method used

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  • A self-healing plugging material for regenerative roof and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: concrete preparation process is:

[0026] A. Add 1 part of graphene to 110 parts of distilled water and stir evenly according to the number of parts by mass, add 21 parts of polyvinyl alcohol resin to the mixed solution and stir for 30 minutes at 90°C, then add 3 parts of water glass and 10 parts of bicarbonate Stir the sodium evenly. At this time, the water glass and sodium bicarbonate react to form a gel. Finally, add 0.7 parts of epoxy resin and stir until particles appear. Add 0.1 part of diethylenetriamine and stir evenly. Oxygen resin wraps the surface of the gel, and through the curing effect of diethylenetriamine on the epoxy resin, thereby forming micron-sized microcapsule particles, which are filtered for 1 hour to prepare material A; the capsule of each micron-sized microcapsule particle The wall thickness is 1-3 μm, and the diameter is 10-40 μm;

[0027] B. Prepare B material by uniformly mixing 100 parts of epoxy resin and 12 parts of diethyl...

Embodiment 2

[0030] Embodiment 2: concrete preparation process is:

[0031] A. Add 3 parts of graphene to 120 parts of distilled water and stir evenly according to the number of parts by mass, add 23 parts of polyvinyl alcohol resin to the mixture and stir for 30 minutes at 90°C, then add 4 parts of water glass and 10 parts of bicarbonate Stir the sodium evenly. At this time, the water glass and sodium bicarbonate react to form a gel. Finally, add 1 part of epoxy resin and stir until particles appear. Add 0.2 parts of diethylenetriamine and stir evenly. Oxygen resin wraps the surface of the gel, and through the curing effect of diethylenetriamine on the epoxy resin, thereby forming micron-sized microcapsule particles, which are filtered for 1 hour to prepare material A; the capsule of each micron-sized microcapsule particle The wall thickness is 1-3 μm, and the diameter is 10-40 μm;

[0032] B. According to the mass parts, 110 parts of epoxy resin and 13 parts of diethylenetriamine are ev...

Embodiment 3

[0035] Embodiment 3: concrete preparation process is:

[0036] A. Add 7 parts of graphene to 110 parts of distilled water and stir evenly according to the number of parts by mass, add 28 parts of polyvinyl alcohol resin to the mixed solution and stir for 30 minutes at 90°C, then add 10 parts of water glass and 30 parts of bicarbonate Stir the sodium evenly. At this time, the water glass and sodium bicarbonate react to form a gel. Finally, add 1.5 parts of epoxy resin and stir until particles appear. Add 0.2 parts of diethylenetriamine and stir evenly. Oxygen resin wraps the surface of the gel, and through the curing effect of diethylenetriamine on the epoxy resin, thereby forming micron-sized microcapsule particles, which are filtered for 1 hour to prepare material A; the capsule of each micron-sized microcapsule particle The wall thickness is 1-3 μm, and the diameter is 10-40 μm;

[0037] B. According to the mass parts, 120 parts of epoxy resin and 14 parts of diethylenetria...

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Abstract

The invention discloses a self-healing plugging material for regeneration roof and a preparation method thereof. The plugging material includes a plugging material for grouting and a plugging material for spraying; the plugging material is prepared by the following steps: Add graphene into distilled water and stir evenly, add polyvinyl alcohol resin to the mixed liquid and stir, add water glass and sodium bicarbonate and stir evenly, finally drop epoxy resin and stir to prepare A material; Ethylene triamine is uniformly mixed to prepare material B; material A and material B are mixed in a certain proportion to form a plugging material for grouting; epoxy resin, ethylene glycol, nano-silicon, diethylenetriamine and water are mixed to prepare Plugging material for spraying. The regenerated roof after plugging by grouting of the present invention can withstand the change of the stress field of the roof coal and rock during the coal mining process, effectively seal the cracks of the roof for a long time, and can self-heal and repair the newly generated secondary cracks after reinforcement, and finally Effectively guarantee the stability of the regenerated roof.

Description

technical field [0001] The invention relates to a plugging material and a preparation method thereof, in particular to a self-healing plugging material used for regenerating roof plates and a preparation method thereof. Background technique [0002] The regenerated roof is a roof with low strength that is cemented by gangue, mudstone, and broken coal left over from incomplete mining under the joint action of underground pressure and rock formation stress. In the initial stage of the regenerated roof, there are a large number of primary cracks inside the roof, and the roof coal-rock stress field is in a balanced state. However, the subsequent mining of coal will lead to the redistribution of the coal-rock stress field of the regenerated roof. The change of stress not only leads to the expansion or closure of the original cracks in the regenerated roof, but also causes a large number of secondary cracks in the roof to form a large number of cracks on the basis of the original ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08L29/04C08K3/04C08K9/10C08K3/34C09D163/00C09D7/61C09D7/63E21D11/10
CPCC08L63/00C09D163/00C09D7/61C09D7/63E21D11/10C08K2201/011C08K2003/023C08L29/04C08K3/042C08K9/10C08K3/34C08K5/053C08K3/02
Inventor 鲁义晏志宏李敏李贺牛会永田兆君路洁心
Owner HUNAN UNIV OF SCI & TECH
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