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Water reducing agent composition for coal mine paste filling as well as preparation method and application of water reducing agent composition

A technology of paste filling and composition, which is applied in the field of paste filling, can solve the problems of poor collapse protection effect of gangue paste filling materials, failure to meet construction design requirements, and inability to effectively reduce water consumption, etc., so as to improve the wrapping performance and Flow performance, improvement of wrapping performance and flow performance, and rapid increase in strength

Active Publication Date: 2021-03-09
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 as well as preparation method and application of water reducing agent composition
  • Water reducing agent composition for coal mine paste filling as well as preparation method and application of water reducing agent composition
  • Water reducing agent composition for coal mine paste filling as well as preparation method and application of water reducing agent composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This example provides a water reducer composition for coal mine paste filling, and the ratio of each component by mass fraction is as follows: aliphatic high-efficiency water reducer 45%, reinforcing agent 5%, dispersant 0.2%, water retention agent 0.01% , and the balance is water.

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

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

[0039] Mix the components of the enhancer evenly,

[0040] Provide the formula amount of water, add aliphatic high-efficiency water reducer, reinforcing agent, dispersant, and water retaining agent in sequence, and mix evenly to obtain the water reducer composition.

Embodiment 2

[0042] This example provides a water reducer composition for coal mine paste filling, and the proportion of each component according to mass fraction is as follows: aliphatic high-efficiency water reducer 55%, reinforcing agent 9%, dispersant 0.4%, water retention agent 0.02% , and the balance is water.

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

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

[0045] Mix the components of the enhancer evenly,

[0046] Provide the formula amount of water, add aliphatic high-efficiency water reducer, reinforcing agent, dispersant, and water retaining agent in sequence, and mix evenly to obtain the water reducer composition.

Embodiment 3

[0048] This example provides a water reducer composition for coal mine paste filling, and the ratio of each component by mass fraction is as follows: aliphatic high-efficiency water reducer 53%, reinforcing agent 6%, dispersant 0.3%, water retention agent 0.015% , and the balance is water.

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

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

[0051] Mix the components of the enhancer evenly,

[0052] Provide the formula amount of water, add aliphatic high-efficiency water reducer, reinforcing agent, dispersant, and water retaining agent in sequence, and mix evenly to obtain the water reducer composition.

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Abstract

The invention discloses a water reducing agent composition for coal mine paste filling as well as a preparation method and application of the water reducing agent composition. The water reducing agentcomposition comprises the following components in percentage by mass: 45%-55% of an aliphatic superplasticizer, 2%-10% of a reinforcing agent, 0.2%-0.7% of a dispersing agent, 0.005%-0.02% of a waterretaining agent and the balance of water. The aliphatic superplasticizer and the reinforcing agent in the water reducing agent composition have a synergistic effect, so that the early strength of thehigh-gangue-content paste filling material can be improved; the dispersing agent can play a role in stabilizing particle dispersion and suspension and promote the water reducing effect of the aliphatic superplasticizer; the water retaining agent can improve the wrapping performance of the filling material slurry; the combined action of the components can be used for improving the flowing performance of the gangue paste filling material, improving the wrapping performance of the gangue paste filling material, improving the strength of the gangue paste filling material, reducing the cost of thefilling material, effectively controlling the slump of the paste filling material and meeting the pumping performance of underground long-distance transportation of a coal mine.

Description

technical field [0001] The invention relates to the technical field of paste filling, in particular to a water reducer composition for coal mine paste filling, a preparation method and application thereof. Background technique [0002] Paste filling refers to the method of making materials (fly ash, cement, river sand and water) into a paste-like slurry, which is transported underground through pipelines through pump pressure or gravity, and fills the goaf in a timely manner. At present, the paste used for coal mine filling is generally made of ordinary cement as the cementitious material, and crushed gangue as the aggregate, which is stirred and formed by adding water. When preparing the filling paste, the fluidity of the gangue paste filling material can be adjusted by adding a water reducer, reducing the amount of cement per unit and reducing the cost. However, due to the large amount of gangue fine powder after crushing, the application effect of existing water reducing...

Claims

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Application Information

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Patent Type & Authority Applications(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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