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Coal mine paste-like filling material using construction waste, and preparation and filling method thereof

A technology for construction waste and filling materials, which is applied in the fields of filling, mining equipment, earthwork drilling, etc. Strict and scientific grading, prolonged pumping time and improved filling efficiency

Inactive Publication Date: 2016-04-13
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These treatment methods either occupy a large amount of land resources and cause serious damage to the local ecological environment in our country, or the treatment cost is too high, the product is single, and cannot meet the market demand, the recycling rate is low, and the level of resource utilization technology is relatively backward. Unable to form scale effect, lack of new technology and process

Method used

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  • Coal mine paste-like filling material using construction waste, and preparation and filling method thereof
  • Coal mine paste-like filling material using construction waste, and preparation and filling method thereof
  • Coal mine paste-like filling material using construction waste, and preparation and filling method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of coal mine paste-like filling material using construction waste, every 1m 3 The filling material consists of the following raw materials: coarse aggregate: construction waste 500Kg and coal gangue 450Kg, fine aggregate: fly ash 400Kg and cementitious material 250Kg, admixture: accelerator 12.5Kg and water reducing agent 7.5Kg, mine water 630Kg.

[0034] The construction wastes are waste concrete blocks, waste sand and gravel, waste bricks and tiles, waste stone materials, ceramic fragments and waste tiles with a particle size of less than 20 mm after secondary crushing, which are produced due to construction, decoration and demolition. 16mm-20mm accounted for 4.32%, particle size 13.5mm-16mm accounted for 3.66%, particle size 9.5mm-13.5mm accounted for 10.82%, particle size 5mm-9.5mm accounted for 21.51%, particle size 1mm ~5mm accounted for 29.05%, particle size 0.3mm~1mm accounted for 14.89%, particle size 0.1mm~0.3mm accounted for 8.76%, particle size 0.075...

Embodiment 2

[0048] A paste-like filling material for coal mines utilizing construction waste, each 1 m3 of the filling material is composed of the following raw materials: coarse aggregate: construction waste 475Kg and coal gangue 425Kg; fine aggregate: fly ash 375Kg and cementation Material 225Kg; admixtures: accelerator 9.5Kg and water reducing agent 5.5Kg; mine water 630Kg.

[0049] The construction wastes are waste concrete blocks, waste sand and gravel, waste bricks and tiles, waste stones, ceramic fragments and waste tiles with a particle size of less than 20mm after secondary crushing, which are produced due to construction, decoration and demolition. 5% are 16mm~20mm, 2% are 13.5mm~16mm, 15% are 9.5mm~13.5mm, 25% are 5mm~9.5mm, 1mm are ~5mm accounted for 25%, particle size 0.3mm~1mm accounted for 15%, particle size 0.1mm~0.3mm accounted for 6%, particle size 0.075mm~0.1mm accounted for 5%, 0~0.075mm 2%;

[0050] The coal gangue is the raw coal mine gangue waste with a particle s...

Embodiment 3

[0060] A paste-like filling material for coal mines utilizing construction waste, each 1 m3 of the filling material is composed of the following raw materials: coarse aggregate: construction waste 450Kg and coal gangue 400Kg; fine aggregate: fly ash 350Kg and cementation Material: 200Kg; Admixture: 6.0Kg of accelerator and 2.0Kg of water reducing agent; 550Kg of mine water.

[0061] The construction wastes are waste concrete blocks, waste sand and gravel, waste bricks and tiles, waste stone materials, ceramic fragments and waste ceramic tiles with a particle size of less than 20mm after secondary crushing, and the particle size is 16mm~20mm 1%, 13.5mm~16mm 5%, 9.5mm~13.5mm 10%, 5mm~9.5mm 20%, 1mm~1mm 5mm accounted for 35%, particle size 0.3mm~1mm accounted for 10%, particle size 0.1mm~0.3mm accounted for 10%, particle size 0.075mm~0.1mm accounted for 4%, 0~0.075mm accounted for 5%.

[0062] The coal gangue is the raw coal mine gangue waste with a particle size of less than 2...

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Abstract

The invention provides a coal mine paste-like filling material using construction waste. The material comprises the following raw materials: a coarse aggregate containing 450-500Kg of construction waste and 400-450Kg of gangue; a fine aggregate containing 350-400Kg of fly ash and 200-250Kg of a binder; an admixture containing 6.0-12.5Kg of an accelerator and 2.0-7.5Kg of a water reducer; and 550-630Kg of mine water. According to the invention, construction waste, gangue and other wastes are used to prepare the paste-like filling material with good pumpability, low bleeding rate and degree of stratification, short setting time, high strength and stability, and low cost. The invention also provides a preparation and filling method of the coal mine paste-like filling material using construction waste.

Description

technical field [0001] The invention belongs to the technical field of mining paste, in particular to a coal mine paste-like filling material using construction waste and a preparation and filling method thereof. Background technique [0002] The process of urbanization in my country is accelerating, followed by a sharp increase in urban waste. According to incomplete statistics, construction waste accounts for 30% to 40% of urban waste, and construction waste is growing at a rate of 500 to 600 tons per 10,000 square meters every year. According to this rate, the total amount of construction waste in my country will reach More than 20 billion tons, an astonishing amount. At present, my country's construction waste disposal methods mainly include open-air stacking, landfill, roadbed filler and brick making. These treatment methods either occupy a large amount of land resources and cause serious damage to the local ecological environment in my country, or the treatment costs ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/16C04B18/12E21F15/00
CPCC04B18/12C04B18/16C04B28/04C04B2111/00724E21F15/005C04B18/08C04B22/14C04B22/148C04B22/0093C04B24/20C04B22/002Y02W30/91
Inventor 史俊伟孟祥瑞高召宁赵光明
Owner ANHUI UNIV OF SCI & TECH
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