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Mucus type sealing agent doped with graded particles and preparation and using method thereof

A technology of particulate matter and sealing agent, which is applied in chemical instruments and methods, earthwork drilling, sealing/isolation, etc. It can solve problems such as failure to seal, new cracks that cannot be effectively sealed, cost of plugging technology, poor effect, etc. , to achieve the effect of improving sealing performance, increasing effective sealing time and reducing labor intensity

Active Publication Date: 2019-02-22
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a viscous sealing agent mixed with graded particles, which solves the problem that existing sealing materials cannot be used for multi-scale drilling on the basis of taking into account the sealing quality, sealing effect and simplicity of process operation. The characteristics of the surrounding rock fissures are sealed, and the new cracks cannot be effectively sealed after mining and pressure relief, or the plugging technology is costly and the effect is not good, etc.

Method used

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  • Mucus type sealing agent doped with graded particles and preparation and using method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A mucus type pore sealing agent mixed with graded particles, which is composed of the following components by weight: 5 parts of sodium carboxymethyl cellulose, 1 part of sodium polyacrylate, 2 parts of gelatin, 8 parts of graded granular talc, 0.05 parts of coconut oil fatty acid diethanolamide, 160 parts of water;

[0025] Among them, the mass ratio of the particle size of the graded particles is 5 to 3 mm: 3 to 1 mm: 1 to 0.4 mm: less than 0.4 mm=3:5:6:6.

[0026] First, weigh the warm water, sodium carboxymethyl cellulose, sodium polyacrylate, graded granular talcum powder, coconut oil fatty acid diethanolamide at about 50℃ according to the amount of material; then pour the warm water into the grouting tank, and then add the weighing The rest of the material is good, then stir with a stirrer for 1.5 minutes so that there is no large block of sodium carboxymethyl cellulose powder in the grouting barrel, and finally grouting under pressure, the slurry penetrates in the fis...

Embodiment 2

[0031] A mucus type pore sealing agent mixed with graded particles, composed of the following components by weight: 4 parts of hydroxyethyl cellulose, 1.5 parts of sodium polyacrylate, 2 parts of gelatin, 7 parts of graded granular calcium carbonate powder, 0.05 parts of coconut oil fatty acid diethanolamide, 140 parts of water;

[0032] Among them, the mass ratio of the particle size of the graded particles is 5 to 3 mm: 3 to 1 mm: 1 to 0.4 mm: less than 0.4 mm=2.4:5:6.3:6.3.

[0033] The preparation and use method is the same as in Example 1.

[0034] The plugging agent of this embodiment is suitable for the situation where the cracks in the surrounding rock of the borehole are poorly developed and the borehole diameter is small.

Embodiment 3

[0036] A mucus type pore sealing agent mixed with graded particles, which is composed of the following components by weight: 6 parts of hydroxyethyl methylcellulose, 2 parts of sodium polyacrylate, 2 parts of gelatin, and 9 parts of graded rock powder , 0.04 parts of non-ionic polyacrylamide, 180 parts of water;

[0037] Among them, the mass ratio of the particle size of the graded particles is 5 to 3 mm: 3 to 1 mm: 1 to 0.4 mm: less than 0.4 mm=3.3:5.3:6:5.4.

[0038] The preparation and use method is the same as in Example 1.

[0039] The plugging agent of this embodiment is suitable for situations where the surrounding rock fractures of the borehole are well developed and the borehole diameter is relatively large.

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Abstract

The invention discloses a mucus type sealing agent doped with graded particles and a preparation and using method thereof. The sealing agent is prepared from the following components in parts by weight: 4-7 parts of cellulose thickening agents, 1-2 parts of sodium polyacrylate, 2-3 parts of gelatin, 7-9 parts of graded particles, 0.04-0.05 part of nonionic surfactant and 140-180 parts of water, wherein the grain mass ratio of the graded particles is (5-3)mm:(3-1)mm:(1-0.4)mm:less than 0.4mm is (2.4-3.3):(5-5.3):(6-6.3):(5.4-6.3). The sealing agent is wide in raw material source, non-toxic, harmless and low in price, and can be used for effectively blocking off multi-dimensional developing fissures of drilled surrounding rocks and new fissures under the influence of mining decompression. Compared with cement base and other solid sealing material, the mucus type sealing agent has the advantages that the drill hole sealing performance and extraction cycle stability can be improved, the sealing quality of extraction drill holes can be improved, secondary slurry filling can be carried out if fissures are well developed after 40 days, the gas extraction effect can be remarkably improved,and the extraction period of drill hole gas can be prolonged.

Description

Technical field [0001] The invention relates to a hole sealing agent for coal mine gas drainage, in particular to a slime type hole sealing agent mixed with graded particles and a preparation and use method thereof. Background technique [0002] Gas drainage is a fundamental measure to prevent coal mine gas disasters. The sealing strength of gas drainage boreholes restricts the effect of coal mine gas control in our country. The gas drainage volume of most mines is not up to the standard. The key reason is that the sealing effect of gas drainage boreholes cannot meet engineering requirements. [0003] At present, cement-based materials are the most common sealing materials in wells, but their slurry permeability is insufficient and will shrink after curing, and their expansion requires proper curing conditions. Mucus can seal gas transport channels stronger than cement-based materials. Research on mucus has already begun. In recent years, it has been mainly used for sealing and p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/10E21B33/13
CPCC09K3/1015E21B33/13
Inventor 李庆钊林柏泉陶青林郑苑楠袁创创
Owner CHINA UNIV OF MINING & TECH
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