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High-water-content micro-expansion filling material composition

A filling material and composition technology, applied in the fields of filling, solid waste management, sustainable waste treatment, etc., can solve the problems of unfavorable filling material pre-preparation, lack of sufficient preparation time, reduction of final strength, etc., and achieve sufficient preparation time, The effect of low cost and easy preparation

Inactive Publication Date: 2014-05-21
ZIBO MINING GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the initial setting time is only 1.5 to 2 hours, which is not conducive to the pre-preparation of filling materials. It needs to be prepared immediately during use, and there is no sufficient preparation time.
In addition, multiple mixing equipments are required to work at the same time during the preparation, which requires more manpower; the short initial setting time and high expansion rate cause easy plugging of the pipe and reduce the final strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 1. In the mixing equipment, first add 100 parts of mine drainage water, then add 57 parts of fly ash discharged from thermal power plants, and stir evenly.

[0015] 2. After stirring evenly, add 1.7 parts of gypsum, 5 parts of cement, 0.18 parts of sodium polyacrylate, and 0.33 parts of magnesium powder. Stir for 5 minutes to obtain a high-water micro-expansion filling material composition.

[0016] Through the pipeline, it is transported to the sealed mine goaf by gravity, with good fluidity and dense connection to the top. The initial setting time is 5.5h, and the final setting time is 10h.

Embodiment 2

[0018] 1. In the mixing equipment, first add 100 parts of mine drainage water, then add 55 parts of fly ash discharged from thermal power plants, and stir evenly.

[0019] 2. After stirring evenly, add 1.5 parts of gypsum, 4 parts of cement, 0.15 parts of sodium polyacrylate and 0.30 parts of magnesium powder. Stir for 5 minutes to obtain a high-water micro-expansion filling material composition.

[0020] Through the pipeline, it is transported to the sealed mine goaf by gravity, with good fluidity and dense connection to the top. The initial setting time is 6 hours, and the final setting time is 11 hours.

Embodiment 3

[0022] 1. In the mixing equipment, first add 100 parts of mine drainage water, then add 60 parts of fly ash discharged from thermal power plants, and stir evenly.

[0023] 2. After stirring evenly, add 2 parts of gypsum, 6 parts of cement, 0.20 parts of sodium polyacrylate and 0.35 parts of magnesium powder. Stir for 5 minutes to obtain a high-water micro-expansion filling material composition.

[0024] Through the pipeline, it is transported to the sealed mine goaf by gravity, with good fluidity and dense connection to the top. The initial setting time is 5h, and the final setting time is 10h.

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Abstract

The invention relates to a high-water-content micro-expansion filling material composition, particularly a filling material for filling-process coal mining, belonging to the technical field of coal mining. The high-water-content micro-expansion filling material composition is characterized by comprising the following components in parts by weight: 100 parts of water, 55-60 parts of high-calcium fly ash, 1.5-2.0 parts of gypsum, 4-6 parts of cement, 0.15-0.20 part of sodium polyacrylate and 0.30-0.35 part of foaming agent. Compared with the prior art, the filling material provided by the invention has the advantages of low cost and great preparation convenience, is easy to transport due to high flow rate, can easily contact the roof due to expandability, and implements roof-contacted filling of the goaf by natural flow and active pressure application. The initial setting time is 5-6 hours, and the final setting time is 10-11 hours. When in use, the high-water-content micro-expansion filling material composition has sufficient preparation time, and can quickly reach a certain compression strength after filling.

Description

technical field [0001] The invention discloses a high-water micro-expansion filling material composition, which belongs to the technical field of coal mining, and in particular relates to a filling material used in coal mining by filling method. Background technique [0002] At present, in the existing technology, the filling materials used in coal mining by the filling method mainly include coal gangue, water sand, and paste materials. The more mature ones are paste materials. Poor fluidity increases the difficulty of transportation. The use of coal gangue and water-sand fillers has the disadvantages of high labor intensity and high operating costs. At present, the research and development directions of new filling materials are high-water materials (water content generally above 55%) and ultra-high water materials (water content above 90%). Ultra-high water materials are still in the research stage, and there is no public formula. [0003] Chinese patent (CN 101792291 A)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F15/00C04B38/02C04B28/14C04B18/08
CPCY02W30/91
Inventor 侯进京张友明郭恒斌康俊才杨平
Owner ZIBO MINING GRP
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