Paste filling material for mine and preparation method of paste filling material

A paste filling and mine technology, which is applied in the field of coal mining, can solve the problems of poor fluidity, high cost, and lack of strength control of filling materials, and achieve the effects of reducing porosity, increasing density, and accelerating the erosion process

Inactive Publication Date: 2018-03-16
CHANGZHOU DAAO NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: Aiming at the problems of poor fluidity of filling materials, lack of scientific strength control and high cost, a paste filling material for mine and its preparation method are provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] Take the construction waste and add it to the jaw crusher for crushing. After magnetic separation and iron removal, the crushed material is soaked in water to remove the floating impurities and then filter to obtain the filter residue. Air-dry the filter residue naturally and add it to the crusher for crushing. Screen out the particles with a particle size of 1mm. Then add the screened crushed particles into a horizontal grinder and grind for 2 hours to obtain recycled aggregate. Weigh 0.8kg of polyacrylamide, 0.4kg of sodium silicate, 0.3kg of sodium lauryl sulfate, and 0.1kg of glucose Sodium acid sodium, add 150L deionized water, stir at 200r / min for 10min, then add 80kg of recycled aggregate, continue to stir for 20min, let it stand for 1h, filter to obtain filter cake, dry the filter cake naturally, get strengthened recycled aggregate, take 10kg Converter steel slag is placed in a drying oven, dried at 105°C to constant weight, and then transferred to a ball mill fo...

example 2

[0027] Take the construction waste and add it to the jaw crusher for crushing. After magnetic separation and iron removal, the crushed material is soaked in water to remove the floating impurities and then filter to obtain the filter residue. Air-dry the filter residue naturally and add it to the crusher for crushing. Screen out the particles with a particle size of 5 mm. Then add the screened crushed particles into a horizontal grinder and grind for 2 hours to obtain recycled aggregate. Weigh 1.0kg of polyacrylamide, 0.5kg of sodium silicate, 0.4kg of sodium lauryl sulfate, and 0.2kg of glucose Sodium acid sodium, add 180L deionized water, stir at 250r / min for 15min, then add 90kg of recycled aggregate, continue to stir for 25min, let it stand for 1h, filter to get filter cake, dry the filter cake naturally, get strengthened recycled aggregate, take 15kg Converter steel slag is placed in a drying oven, dried at 108°C to constant weight, and then transferred to a ball mill for ...

example 3

[0029] Take the construction waste and add it to the jaw crusher for crushing. After magnetic separation and iron removal, the crushed material is soaked in water to remove the floating impurities and then filter to obtain the filter residue. Air-dry the filter residue naturally and add it to the crusher for crushing. Screen out the particles with a particle size of 10mm. Crushed grains, then put the screened broken grains into a horizontal grinder and grind for 3 hours to obtain recycled aggregates, weigh 1.2kg polyacrylamide, 0.6kg sodium silicate, 0.5kg sodium lauryl sulfate, 0.3kg glucose Sodium acid sodium, add 200L deionized water, stir at 300r / min for 20min, then add 100kg of recycled aggregate, continue stirring for 30min, let it stand for 2h, filter to get filter cake, dry the filter cake naturally, get strengthened recycled aggregate, take 20kg Converter steel slag is placed in a drying oven, dried at 110°C to constant weight, and then transferred to a ball mill for b...

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Abstract

The invention relates to a paste filling material for a mine and a preparation method of the paste filling material, and belongs to the technical field of coal mining. By taking building wastes as rawmaterials, the cohesiveness of recycled aggregates and fresh mortar is enhanced; meanwhile, particles with relatively small particle size and a cementing material form a grading system microscopically; filling water originally filling pores are replaced to become free water, so that the flowability of slurry is improved; a large number of pores formed in a hydration process are filled with the slurry through a micro-aggregate effect, so that the structure of a mortar hardened body is compacted, and the strength and the impermeability of mortar are substantially improved; meanwhile, by addingof additives such as polyaluminum and calcium chloride, erosion by the cementing material to reinforced recycled aggregates is accelerated, synergistic hydration of the cementing material and the reinforced recycled aggregates is promoted, the porosity of slurry is reduced, and the compactness of the slurry is improved; furthermore, a hydrated product with high intensity and high stability can beproduced, and a filling material with high overall intensity is formed; moreover, the initial setting time and the final setting time are short; waste resources are comprehensively used.

Description

technical field [0001] The invention relates to a paste filling material for mines and a preparation method thereof, belonging to the technical field of coal mining. Background technique [0002] Filling coal mining technology is a coal mining method that uses artificial filling of goaf instead of mining resources to support the overlying strata and control the fracture of the overlying strata. It can not only extract coal resources, but also effectively control surface subsidence and protect the ground. Buildings and cultivated land can realize the protective mining of the surface ecological environment, which is one of the main methods of coal green mining. In the process of filling and mining, a large amount of filling materials needs to be consumed. New cemented filling technologies developed in recent years, such as: waste rock cemented filling technology, high-concentration full tailings cemented filling technology, paste filling technology and high-water filling techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B18/08C04B18/142C04B18/141C04B18/064C04B22/064C04B18/167C04B24/2652C04B24/16C04B22/124C04B22/126C04B22/147C04B22/04C04B24/383C04B12/04C04B2103/302
Inventor 黄宇成王文新韩昏晓
Owner CHANGZHOU DAAO NEW MATERIAL TECH CO LTD
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