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Cement-based spraying material and preparation method and application thereof

A spraying material, cement-based technology, applied in the direction of cement coatings, etc., can solve the problems of sprayed coatings such as easy cracking under pressure, poor bearing capacity, and long setting time

Inactive Publication Date: 2021-01-22
SHAANXI COAL & CHEM TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, although the existing underground cement-based spraying materials for coal mines have a certain supporting effect, they have the disadvantages of long solidification time and poor flexibility, and the early bearing capacity of the materials is poor. Great hidden dangers to production safety

Method used

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  • Cement-based spraying material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Pour 70 parts of cement, 2 parts of potassium persulfate / sodium sulfite with a mass ratio of 1:1, 1 part of naphthalene-based water reducer and 2 parts of sodium carbonate / calcium chloride with a mass ratio of 1:1 into the mixer Stir and mix for 30 minutes to obtain component A. Stir and mix 30 parts of acrylamide, 2 parts of N,N-dimethylbisacrylamide and 60 parts of water for 40 minutes to completely dissolve to obtain component B. Pour component A into the mixing chamber of the spraying equipment, start stirring at a slow speed, add component B at the same time, stir while adding, stirring for 2 minutes, and then spray the material, the spraying distance is 1.5m, and the spraying thickness is 3mm.

Embodiment 2

[0036] Pour 60 parts of cement, 3 parts of ammonium persulfate, 1 part of naphthalene-based water reducer and 1 part of calcium fluoroaluminate into a mixer and mix for 30 minutes to obtain component A. Stir and mix 40 parts of acrylic acid, 4 parts of aziridine cross-linking agent and 70 parts of water for 30 minutes, completely dissolve to obtain component B. Pour component A into the mixing chamber of the spraying equipment, start stirring at a slow speed, and add component B at the same time, stirring while adding, stirring for 2 minutes, and then spraying and beating, the spraying distance is 2m, and the spraying thickness is 2mm.

Embodiment 3

[0038] Pour 70 parts of cement, 4 parts of potassium persulfate / sodium sulfite with a mass ratio of 1:1, 2 parts of naphthalene-based water reducer and 3 parts of sodium carbonate into the mixer and stir for 20 minutes to obtain component A. Stir and mix 40 parts of acrylic acid / acrylamide with a mass ratio of 1:1, 3 parts of N,N-dimethylbisacrylamide and 70 parts of water for 30 minutes, and completely dissolve to obtain component B. Pour component A into the mixing bin of the spraying equipment, start stirring at a slow speed, and add component B at the same time, stirring while adding, stirring for 2 minutes, and then spraying and beating, the spraying distance is 3m, and the spraying thickness is 4mm.

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Abstract

The invention discloses a cement-based spraying material and a preparation method and application thereof. The cement-based spraying material comprises the following components in parts by weight: 60-80 parts of cement, 20-50 parts of an organic monomer, 1-5 parts of a cross-linking agent, 1-5 parts of an initiator, 1-5 parts of a coagulation accelerator, 1-3 parts of a water reducing agent and 60-100 parts of water, the organic monomer is one or more of acrylamide, acrylic acid, butyl acrylate and ethylene glycol; and the cross-linking agent is one or more of N, N-dimethyl diacrylamide, triethylene diammonium, ethylene glycol dimethacrylate, carbodiimide and an aziridine cross-linking agent. During preparation, the cement, the water reducing agent, the initiator and the coagulant are uniformly mixed to obtain powder, the organic monomer, the cross-linking agent and the water are uniformly mixed to obtain a liquid, and during use, the powder and the liquid are uniformly mixed to obtainthe cement-based spraying material so that the hardening time is short, and the deformation resistance is high.

Description

technical field [0001] The invention relates to the technical field of spraying materials, in particular to a cement-based spraying material and its preparation method and application. Background technique [0002] Coal spontaneous combustion is one of the main natural disasters in mines in my country. With the gradual increase of coal mining depth, the risk of gas management in mines is getting higher and higher, and efficient governance is becoming more and more difficult. Underground air leakage control is one of the most important means to prevent harmful gas from pouring into the production area and coal seam spontaneous combustion fire. The spraying treatment on the surface of coal mine roadway effectively solves the cracking of the roadway surface and the leakage of flammable gas, which is conducive to improving the safety of underground production. [0003] At present, although the existing underground cement-based spraying materials for coal mines have a certain su...

Claims

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Application Information

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IPC IPC(8): C09D1/08
CPCC09D1/08
Inventor 胡国和徐文全虎晓东安秀煜耿耀强王小军
Owner SHAANXI COAL & CHEM TECH INST
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