Novel mine filling quick-setting enhanced additive

A mine filling and enhanced technology, applied in the field of new mine filling quick-setting enhanced admixture, can solve the problems of poor rheological properties, long setting time, large shrinkage, etc., achieve good water retention performance, high setting time, and prevent aggregation Effect

Pending Publication Date: 2019-07-09
HEBEI JINTAICHENG BUILDING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a new type of quick-setting enhanced admixture for mine filling, which solves the problems of poor rheological properties, low strength, long setting time, and large shrinkage of mine filling materials in the prior art under the filling conditions of different slurry concentrations.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] According to the composition and ratio of the raw materials, the slurry concentration rheological agent 20wt%, the alkaline activator 30wt%, the quick-setting agent 25wt%, and the early strength agent 25wt% are mixed evenly to configure a new mine filling quick-setting enhanced admixture.

[0030] First, the new mine filling quick-setting enhanced admixture is mixed with the cementitious material to prepare the mixed material, and then the aforementioned mixed material with different lime-sand ratio (1:5) is mixed with the iron tailing sand evenly to prepare the low-shrinkage and early-strength mine filling Slurry. Among them: the gradation of iron tailings is 10.75% +60 mesh, 19.09% +100 mesh, 42.82% -100+200 mesh, 9.68% -200+300 mesh, 7.13% -300+400 mesh, and -400 mesh at 10.53%.

[0031] The low-shrinkage early-strength mine filling slurry prepared above is pumped into the goaf for filling, wherein:

[0032] In the mixed material, the amount of additives accounts f...

Embodiment 2

[0038] According to the composition and ratio of the raw materials, the slurry concentration rheology agent is 35wt%, the alkaline activator is 25wt%, the quick-setting agent is 20wt%, and the early strength agent is 20wt%, and the new mine filling quick-setting enhanced admixture is prepared.

[0039] First, the new mine filling quick-setting enhanced admixture is mixed with the cementitious material to prepare the mixed material, and then the aforementioned mixed material with different lime-sand ratio (1:5) is mixed with the iron tailing sand evenly to prepare the low-shrinkage and early-strength mine filling Slurry. Among them: the gradation of iron tailings is 23.30% +100 mesh, 22.09% -100+200 mesh, 5.82% -200+300 mesh, 14.54% -300+400 mesh, and 34.25% -400 mesh .

[0040] The low-shrinkage early-strength mine filling slurry prepared above is pumped into the goaf for filling, wherein:

[0041] In the mixed material, the additive content accounts for 0% of the mass perce...

Embodiment 3

[0049] According to the composition and ratio of the raw materials, the slurry concentration rheology agent is 15wt%, the alkaline activator is 32wt%, the setting accelerator is 28wt%, and the early strength agent is 25wt%, and the new mine filling quick-setting enhanced admixture is prepared.

[0050] First, the new mine filling quick-setting enhanced admixture is mixed with the cementitious material to prepare the mixed material, and then the aforementioned mixed material with different lime-sand ratio (1:5) is mixed with the iron tailing sand evenly to prepare the low-shrinkage and early-strength mine filling Slurry. Among them: the gradation of iron tailings is 21.75% +60 mesh, 30.99% +100 mesh, 25.99% -100+200 mesh, 4.42% -200+300 mesh, 4.23% -300+400 mesh, and -400 mesh at 13.1%.

[0051] The low-shrinkage early-strength mine filling slurry prepared above is pumped into the goaf for filling, wherein:

[0052] In the mixed material, the additive content accounts for 0% ...

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Abstract

The invention provides a novel mine filling quick-setting enhanced additive and belongs to the technical field of underground filling of metal mines. The novel mine filling quick-setting enhanced additive comprises the following components in percentage by weight: 10-40wt% of a slurry rheological agent, 20-35wt% of an alkaline activator, 15-35wt% of an accelerator and 15-30wt% of an early strengthagent. According to the invention, the function of mine filling slurry is studied, the slurry rheological agent, the alkaline activator, the accelerator and the early strength agent are selected as raw materials, the ratio of the raw materials is adaptively researched, and finally, the novel mine filling quick-setting enhanced additive which enables mine filling slurry to have good flowing property, quick setting time and high early strength is obtained. And under the condition that the additive is used, the performance of a filling material can be effectively improved, it is guaranteed thatthe filling slurry can keep good rheological property, rapid hardening effect, high strength, good volume stability, low settling shrinkage rate and other characteristics under large-volume and different-concentration conditions, and all the properties are excellent.

Description

technical field [0001] The invention relates to the technical field of underground filling in metal mines, in particular to a novel mine filling quick-setting enhanced admixture for improving the rheological properties, quick-setting and compressive strength of various ages of mine filling slurry. Background technique [0002] The filling mining method refers to the mining method of filling the gob with filling materials while accompanying ore falling, transportation and other operations. It can be divided into two methods: cemented filling and non-cemented filling. Among them, cemented filling is widely used, and the sources of materials are waste rock accumulated on the surface, waste rock beside the excavation pit, tailings from the dressing plant, slag from the smelter, Gebi aggregate, and quarrying from the surface. [0003] With the wide application of filling mining method in metal mines, in order to reduce the production cost and improve the safety of mining after fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/22C04B26/00C04B28/00C04B103/12C04B111/00C04B111/20
CPCC04B26/00C04B28/00C04B40/0039C04B2103/12C04B2111/00146C04B2111/00724C04B2111/20C04B24/18C04B24/226C04B24/125C04B14/106C04B18/023C04B24/04C04B22/062C04B18/0427C04B18/141C04B22/14C04B22/148C04B22/10C04B24/122C04B2103/0054C04B2103/302C04B18/12
Inventor 郝军中汤畅胡杰的郝军军温煦佘亮
Owner HEBEI JINTAICHENG BUILDING MATERIAL
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