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Contiguous seam efficient filling material

A technology for filling materials and coal seams, which is applied in the field of high-efficiency filling materials for short-distance coal seams, can solve problems such as lack of scientific basis and methods, and achieve the effects of solving sewage problems, low cost, and wide material sources.

Inactive Publication Date: 2017-03-22
DATONG COAL MINE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no scientific basis and method for how to choose the ratio of gangue block, fly ash and other corresponding material formulas.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] High-efficiency filling materials for close-distance coal seams, in which the mass parts of each component are as follows: 134 parts of water, 164 parts of ordinary Portland cement, 44 parts of fly ash, 85 parts of gangue blocks, 227 parts of river sand, and 340 parts of stones. 2.8 parts of early strength agent, 3.2 parts of superplasticizer.

Embodiment 2

[0017] High-efficiency filling materials for short-distance coal seams, the mass parts of each component are as follows: 84 parts of water, 174 parts of ordinary Portland cement, 452 parts of gangue blocks, 291 parts of river sand, 5.5 parts of early strength agent, and 3.5 parts of water reducing agent share.

Embodiment 3

[0019] High-efficiency filling materials for close-distance coal seams, the mass parts of each component are as follows: 127 parts of water, 169 parts of ordinary Portland cement, 25 parts of fly ash, 440 parts of gangue blocks and stones, 256 parts of river sand, early strength 4 parts of water-reducing agent and 3.3 parts of water-reducing agent, wherein gangue blocks and stones account for 99 parts of gangue blocks and 270 parts of stones respectively.

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Abstract

The invention relates to a contiguous seam efficient filling material. The problem of application of waste rock blocks and coal ash in seam filling is solved. The contiguous seam efficient filling material is composed of, by mass, 84-134 parts of water, 164-174 parts of ordinary portland cement, 0-44 parts of coal ash, 425-452 parts of waste rock blocks and pebbles, 227-291 parts of bank sand, 2.8-5.5 parts of early strength agent and 3.2-3.5 parts of water reducing agents; and the mass parts of the waste rock blocks and the pebbles are 85-452 parts and 0-340 parts correspondingly by total amount of the waste rock blocks and the pebbles. The proper proportion of the waste rock blocks and the pebbles in seam filling is determined through lots of experiments and data analysis. The contiguous seam efficient filling material is wide in material source and low in cost, the pollution discharge problem of mine enterprises can be solved, and material uniaxial compressive strength, slump and the like of the material meet the requirements.

Description

technical field [0001] The invention relates to a support method for underground coal mines, in particular to a high-efficiency filling material for short-distance coal seams. Background technique [0002] In the mining process, sand, stone or other materials filled into the stope or goaf are collectively referred to as filling materials. The components of commonly used filling materials can be divided into three categories: inert materials, cementitious materials and modified materials. [0003] The high-efficiency admixtures commonly used in the mine filling process mainly include early strength agents and water reducers. The early strength agent can improve the early strength of the filling body and shorten the setting time, but has no obvious effect on the later strength. The water reducing agent can reduce the water consumption of the mixture, and can increase the concentration of the filling slurry under the same slump condition. [0004] Fly ash is a fine powder col...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/08C04B18/12
CPCC04B18/08C04B18/12C04B28/04C04B2111/00663C04B22/002C04B14/068C04B14/02C04B2103/12C04B2103/302Y02W30/91
Inventor 张有喜田利军宁建国郭万忠谭云亮王华杨智文王钰博宋召军赵军纪润清王军李宏宇王俊侯宝月周健薛天虎刘学生胡浩
Owner DATONG COAL MINE GRP
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