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Water reducing agent composition for coal mine paste filling and its preparation method and application

A paste filling and composition technology, which is applied in the field of paste filling, can solve the problems of poor slump-preserving effect of gangue gypsum filling materials, unsatisfactory application effect of water-reducing agent, unable to meet construction design requirements, etc., so as to improve the wrapping performance. and flow properties, rapid strength increase, and the effect of promoting water reduction

Active Publication Date: 2022-07-15
XUZHOU CUMT BACKFILL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large amount of gangue fine powder after crushing, the application effect of existing water reducing agents in gangue paste filling materials is not ideal, mainly due to the reduction of water reducing agents on the market in gangue paste filling materials. The water effect is poor, and the water consumption cannot be effectively reduced. The cement consumption is still high, and it is difficult to significantly reduce the cost
In addition, the gangue paste filling material made by conventional water reducing agent has poor collapse protection effect and cannot meet the construction design requirements

Method used

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  • Water reducing agent composition for coal mine paste filling and its preparation method and application
  • Water reducing agent composition for coal mine paste filling and its preparation method and application
  • Water reducing agent composition for coal mine paste filling and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment provides a water-reducing agent composition for coal mine paste filling. The proportions of the components are as follows: aliphatic high-efficiency water-reducing agent 45%, reinforcing agent 5%, dispersant 0.2%, water-retaining agent 0.01% , the balance is water.

[0037] Specifically, the above-mentioned reinforcing agent is compounded by ethylene glycol and sodium thiosulfate decahydrate in a mass ratio of 1:9, the above-mentioned dispersing agent is CPE1500, and the above-mentioned water-retaining agent is HPC.

[0038] The preparation method of this water reducing agent composition comprises the following steps:

[0039] Mix the components of the enhancer evenly,

[0040] The water in the prescribed amount is provided, and an aliphatic superplasticizer, a reinforcing agent, a dispersant, and a water-retaining agent are added in sequence, and the mixture is uniformly mixed to obtain the water-reducing agent composition.

Embodiment 2

[0042] This embodiment provides a water-reducing agent composition for coal mine paste filling. The proportions of the components are as follows: aliphatic superplasticizer 55%, reinforcing agent 9%, dispersant 0.4%, water-retaining agent 0.02% , the balance is water.

[0043] Specifically, the above-mentioned reinforcing agent is compounded by ethylene glycol and sodium thiosulfate decahydrate in a mass ratio of 1:9, the above-mentioned dispersing agent is CPE1500, and the above-mentioned water-retaining agent is HPC.

[0044] The preparation method of this water reducing agent composition comprises the following steps:

[0045] Mix the components of the enhancer evenly,

[0046] The water in the prescribed amount is provided, and an aliphatic superplasticizer, a reinforcing agent, a dispersant, and a water-retaining agent are added in sequence, and the mixture is uniformly mixed to obtain the water-reducing agent composition.

Embodiment 3

[0048] This embodiment provides a water-reducing agent composition for coal mine paste filling. The proportions of the components are as follows: aliphatic superplasticizer 53%, reinforcing agent 6%, dispersant 0.3%, water-retaining agent 0.015% , the remainder is water.

[0049] Specifically, the above-mentioned reinforcing agent is compounded by ethylene glycol and sodium thiosulfate decahydrate in a mass ratio of 1:9, the above-mentioned dispersing agent is CPE1500, and the above-mentioned water-retaining agent is HPC.

[0050] The preparation method of this water reducing agent composition comprises the following steps:

[0051] Mix the components of the enhancer evenly,

[0052] The water in the prescribed amount is provided, and an aliphatic superplasticizer, a reinforcing agent, a dispersant, and a water-retaining agent are added in sequence, and the mixture is uniformly mixed to obtain the water-reducing agent composition.

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Abstract

The invention discloses a water-reducing agent composition for coal mine paste filling, a preparation method and application thereof. The components of the water-reducing agent composition are proportioned by mass fraction as follows: aliphatic high-efficiency water-reducing agent 45%~ 55%, reinforcing agent 2%-10%, dispersant 0.2%-0.7%, water-retaining agent 0.005%-0.02%, and the balance is water. The aliphatic high-efficiency water-reducing agent in the water-reducing agent composition has a synergistic effect with the reinforcing agent, which can improve the early strength of the gangue body filling material, and the dispersing agent can stabilize the dispersion and suspension of particles, and promote the aliphatic high-efficiency water-reducing agent. The water-retaining agent can improve the packing performance of the filling material slurry, and the combined action of each component can be used to improve the flow performance of the gangue gypsum filling material, improve the packing performance of the gangue gypsum filling material, and at the same time improve the gangue gypsum filling material. The strength of the filling material can reduce the cost of the filling material, and can effectively control the slump of the paste filling material, so as to meet the pumping performance of long-distance transportation in coal mines.

Description

technical field [0001] The invention relates to the technical field of paste filling, in particular to a water reducing agent composition for coal mine paste filling and a preparation method and application thereof. Background technique [0002] Paste filling refers to the method of making materials (fly ash, cementitious material, river sand and water) into paste-like slurry, transporting them downhole through pipelines through pump pressure or gravity, and filling the goaf in time. At present, the paste used for coal mine filling generally uses ordinary cement as the cementing material, and the crushed gangue is used as the aggregate, and water is added for stirring and forming. When preparing the filling paste, the fluidity of the gangue gypsum filling material can be adjusted by adding a water reducing agent, thereby reducing the unit cement dosage and cost. However, due to the large amount of gangue fine powder after crushing, the application effect of the existing wat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/38C04B28/04
CPCC04B40/0039C04B28/04C04B2111/00663C04B2201/50C04B24/08C04B24/026C04B22/14C04B24/32C04B24/383C04B18/12
Inventor 李梦马英刘长安谢鸿赞刘刚
Owner XUZHOU CUMT BACKFILL TECH
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