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A gob paste filling slurry and preparation method thereof

A technology of paste filling and goaf, which is applied in the field of paste filling slurry and its preparation in mining areas, which can solve the problems of failure to meet the requirements of working conditions, limited ability of slurry to support the goaf, and slow drying of sand and gravel. , to achieve the effect of accelerating the drying speed, facilitating recovery and good compatibility

Active Publication Date: 2021-07-20
利奥生态科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the water-sand filling method, filling materials such as sand, gravel, or slag are mainly transported underground by hydraulic power to support the goaf, but a large amount of water will remain in the goaf. Moreover, the drying of the sand and gravel is very slow, resulting in a very limited support capacity of the slurry to the goaf, and even fails to meet the requirements of the working conditions

Method used

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  • A gob paste filling slurry and preparation method thereof
  • A gob paste filling slurry and preparation method thereof
  • A gob paste filling slurry and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example

[0058] The water-absorbent resin in this preparation example was purchased from the super absorbent resin SAP of Shenyang Keystone Ssangyong Chemical Co., Ltd.

[0059] The hot-melt adhesive can choose XT-610 low-temperature hot-melt adhesive from Dongguan Yimeiduo Thermal Transfer Material Co., Ltd.

preparation example 1

[0061] Select a water-absorbing resin with a particle size of 9mm and a maximum water-absorbing weight of 3900% of its own weight.

[0062] The fly ash with a particle size of 250 μm and a maximum water absorption weight of 90% of its own weight is selected.

[0063] In parts by weight, 12 parts of fly ash are wrapped on the surface of 30 parts of water-absorbing resin.

[0064] Specific operations include:

[0065] Step 1, coating of fly ash, weighing 24 parts by weight of fly ash and heating to 120°C, then pouring 30 parts of water-absorbing resin into the hot fly ash at room temperature, stirring at room temperature and letting it cool naturally Cooling, the stirring speed is 20r / min, and stirring for 15min, so that the fly ash is coated on the surface of the water-absorbing resin to form primary water-absorbing agent particles;

[0066] Step 2, the treatment of the thickened layer of fly ash, heating the primary water-absorbing agent particles to 85°C, spraying hot-melt ...

preparation example 2

[0069] Select a water-absorbing resin with a particle size of 14mm and a maximum water-absorbing weight of 3900% of its own weight.

[0070] The fly ash with a particle size of 250 μm and a maximum water absorption weight of 90% of its own weight is selected.

[0071] Wrap 15 parts of fly ash on the surface of 30 parts of water-absorbent resin.

[0072] Specific operations include:

[0073] Step 1, coating of fly ash, weighing 30 parts by weight of fly ash and heating to 120°C, then pouring 30 parts of water-absorbing resin into the hot fly ash at room temperature, stirring at room temperature and letting it cool naturally Cooling, the stirring speed is 25r / min, and stirring for 20min, so that the fly ash is coated on the surface of the water-absorbing resin to form primary water-absorbing agent particles;

[0074] Step 2, the treatment of the thickened layer of fly ash, heating the primary water-absorbing agent particles to 85°C, spraying hot-melt adhesive on the surface, p...

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Abstract

The application relates to the field of mine goaf filling, and specifically discloses a goaf filling slurry and a preparation method thereof. A mined-out area paste filling slurry composition / product includes dry aggregate, 1800-2300 parts; water, 270-330 parts; thickener, 40-60 parts; clay, 150-180 parts; water-absorbing agent 42 ‑88 parts, the water-absorbing agent is made of water-absorbing resin and fly ash; its preparation method is: add dry aggregate, clay, and thickener in proportion and stir evenly, add water and continue stirring, and then add the water-absorbing agent for a second stirring. The composition / product of the present application The composition can be used for filling goafs in mines, and has the advantages of affecting the soil system and facilitating the restoration of soil ecology.

Description

technical field [0001] The application relates to the field of mine goaf filling, more specifically, it relates to a mining area paste filling slurry and a preparation method thereof. Background technique [0002] my country is a country with a large amount of coal resources, and it is also a country with a large production and consumption of coal. The mines after the completion of mining form a large area of ​​goaf, and the ground of the goaf is often collapsed and damaged in a large area. In order to protect the overall structure of the mine, it is necessary to backfill the goaf after mining the coal mine. [0003] Common backfilling methods include dry filling, water-sand filling and cemented filling, etc. Taking cemented filling as an example, the staff first mixes cement, sand, gravel, waste, etc., and then mixes the mixed material by grouting or self-weight flow. The final filling paste is injected into the goaf to fill the goaf. [0004] However, the inventors of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B30/00
CPCC04B30/00C04B2111/00724C04B2201/50C04B24/383C04B24/38C04B18/08C04B24/24C04B14/02C04B14/06C04B18/12C04B14/10
Inventor 常晓娜王晓东王曦明窦云龙
Owner 利奥生态科技集团有限公司
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