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High-moisture-ratio quick-setting filling material as well as preparation method and use method thereof

A filling material and high water rate technology, applied in the mining industry, can solve problems such as failure to meet the requirements of filling mines, low resource recovery rate, surface subsidence in mining areas, etc., and achieve high water-solid ratio, fast strength growth, and short gelation time Effect

Inactive Publication Date: 2014-12-24
河北充填采矿技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the long-term use of traditional coal mining methods and the increase in mining intensity year by year, a series of serious problems have arisen: low resource recovery rate, large-scale surface subsidence in mining areas, massive loss of groundwater, frequent accidents, etc.
[0004] However, the currently commonly used filling materials have poor hydrophilicity, slow coagulation speed, and slow strength growth, which cannot meet the requirements of mine filling.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Mix 100kg of anhydrite and 1kg of vanadium pentoxide evenly, heat to 800°C, control the temperature, calcinate for three hours, stop heating, and keep warm for two hours to obtain modified gypsum.

[0035] Fully dry the aluminate cement, modified gypsum, and quicklime, and then transport them to the grinding workshop through a belt conveyor, and use a ball mill for powder. The grinding fineness of aluminate cement is 80 mesh, and the grinding fineness of modified gypsum is fine. The degree of grinding is 100 mesh, and the grinding fineness of quicklime is 50 mesh.

[0036] Weigh 90kg of aluminate cement, mix with 10kg of admixture (sodium hydroxymethyl cellulose, polyacrylamide, calcium sulfoaluminate in a weight ratio of 1:1:1) to obtain a masterbatch; weigh 65kg of modified gypsum 1. Quick lime 35kg, mixes evenly with coagulant 4kg, obtains auxiliary material.

[0037] Mix 100kg of masterbatch with 1600kg of water to make a single slurry of masterbatch, mix 104kg of ...

Embodiment 2

[0039] Mix 100kg of anhydrite and 1kg of vanadium pentoxide evenly, heat to 400°C, control the temperature, calcinate for three hours, stop heating, and keep warm for one hour to obtain modified gypsum.

[0040] Fully dry the aluminate cement, modified gypsum, and quicklime, and then transport them to the grinding workshop through a belt conveyor, and use a ball mill for powder. The grinding fineness of aluminate cement is 80 mesh, and the grinding fineness of modified gypsum is fine. The degree of grinding is 100 mesh, and the grinding fineness of quicklime is 50 mesh.

[0041] Weigh 92kg of aluminate cement, mix it with 8kg of admixture (sodium hydroxymethylcellulose, polyacrylamide, calcium sulfoaluminate in a weight ratio of 3:2:1) to obtain a masterbatch; weigh 75kg of modified gypsum 1. Quick lime 25kg, mixes evenly with coagulant 3kg, obtains auxiliary material.

[0042] Mix 100kg of masterbatch with 1200kg of water to make a single slurry of masterbatch, mix 103kg of ...

Embodiment 3

[0044] Mix 100kg of anhydrite and 1kg of vanadium pentoxide evenly, heat to 800°C, control the temperature, calcinate for three hours, stop heating, and keep warm for three hours to obtain modified gypsum.

[0045] Fully dry the aluminate cement, modified gypsum, and quicklime, and then transport them to the grinding workshop through a belt conveyor, and use a ball mill for powder. The grinding fineness of aluminate cement is 80 mesh, and the grinding fineness of modified gypsum is fine. The degree of grinding is 100 mesh, and the grinding fineness of quicklime is 50 mesh.

[0046]Weigh 94kg of aluminate cement, and mix it with 6kg of admixture (sodium hydroxymethylcellulose, polyacrylamide, calcium sulfoaluminate in a weight ratio of 1:3:4) to obtain a masterbatch; weigh 85kg of modified gypsum 1. Quick lime 15kg, mixes evenly with coagulant 2kg, obtains auxiliary material.

[0047] Mix 100kg of masterbatch with 800kg of water to make a single slurry of masterbatch, mix 102k...

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Abstract

The invention discloses a high-moisture-ratio quick-setting filling material which is prepared from the following raw materials in parts by weight: master batch including 90-94 parts of aluminate cement and 6-10 parts of an additive, and auxiliary materials including 65-85 parts of modified gypsum, 15-35 parts of quick lime and 2-4 parts of a coagulation accelerator. The filling material is high in water-solid ratio, good in hydrophilicity, short in gel time, quick in early strength enhancement, slow in later strength enhancement, good in flowability and pumpability, nontoxic and harmless, and can meet the requirements of mine filling.

Description

technical field [0001] The invention belongs to the technical field of mining, and in particular relates to a mine filling material with high moisture content, a preparation method and an application method thereof. Background technique [0002] my country's energy reserves are characterized by rich coal, poor oil, and little gas. The unique structure of energy reserves, coupled with the rapid increase in the energy demand of the fast-growing economy, determines that coal occupies a dominant position in my country's energy consumption structure. However, due to the long-term use of traditional coal mining methods and the increase in mining intensity year by year, a series of serious problems have arisen: low resource recovery rate, large-scale surface subsidence in mining areas, massive loss of groundwater, frequent accidents, etc. In order to reduce the deformation of surface buildings and structures caused by mining, the mined-out area of ​​mining engineering generally n...

Claims

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Application Information

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IPC IPC(8): C04B28/06C04B22/14C04B22/06
Inventor 刘建功赵庆彪高会春周兴国刘庆斌王英秦大健曾瑞萍王学伟郝永超王燕春
Owner 河北充填采矿技术有限公司
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