Mine filling method, material and equipment

A mine filling and equipment technology, which is applied in mining equipment, fillings, earth drilling and mining, etc., can solve problems such as occupation, waste of land resources, and secondary pollution of the environment, and achieve high efficiency, reduce carbon emissions, and reduce hazards.

Active Publication Date: 2021-12-03
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the garbage disposal methods adopted by the construction industry are open-air stacking and landfill, which will not only cause secondary pollution to the environment, but also occupy and waste a lot of land resources

Method used

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  • Mine filling method, material and equipment
  • Mine filling method, material and equipment
  • Mine filling method, material and equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] use figure 1 The shown equipment will be made of bricks (mass percentage is 35%) and concrete, and the construction waste is crushed into particles, and the particle gradation is as follows: figure 2 As shown, the particles smaller than 0.075mm exceed 20% of the total mass of poured waste, and the particle size of the particles is smaller than 2mm.

[0074] According to Table 1, take or measure the granules, active magnesium oxide, and liquid mixture of construction waste, and fill according to the following steps. The purity of activated magnesium oxide is >98%, the particle size is less than 200 mesh, and the activity is 12-25s.

[0075] Mix the weighed construction waste and active magnesium oxide into a solid mixture; mix the solid mixture with the measured liquid mixture evenly to form a fluid paste; fill the paste into a cylindrical mold, and keep it for 28 days carry out testing.

[0076] The ratio of the liquid mixture is as follows: 7.52 parts of solid urea...

Embodiment 2

[0078] The present embodiment is substantially the same as embodiment 1, and the difference is only in the ratio of construction waste and active magnesium oxide and the ratio of solid mixture and liquid mixture, specifically see Table 1.

Embodiment 3

[0080] The present embodiment is substantially the same as embodiment 1, and the difference is only in the ratio of construction waste and active magnesium oxide and the ratio of solid mixture and liquid mixture, specifically see Table 1.

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PUM

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Abstract

The invention discloses a mine filling method, a material and equipment. The mine filling method comprises the following steps: A, mixing 60-80 parts by mass of particles of construction waste and 2-7 parts by mass of active magnesium oxide into a solid mixture; b, mixing bacterial liquid and urea into a liquid mixture, wherein the bacterial liquid contains urease-producing bacteria, and the concentration of the urea is 2-6 mol / L; and C, uniformly mixing the solid mixture and the liquid mixture according to the mass ratio of 70: (20-35) to form flowable slurry or paste, injecting the flowable slurry or paste into the goaf, and performing standing for curing. On the premise that a good curing effect is guaranteed, the construction waste is used for replacing cement to fill the mine, cement is not used, and meanwhile good fluidity is achieved.

Description

technical field [0001] The invention belongs to the field of mine filling, and relates to a mine filling method, material and equipment, in particular to a method, material and equipment for filling mines with construction waste. Background technique [0002] The cement or cement-based materials commonly used in the control engineering of coal mining subsidence areas are mainly cement or cement-based materials, but the cement-based materials will increase the pH value of the underground environment and cause environmental damage. In addition, the production process of cement consumes a large amount of energy and produces a large amount of greenhouse gases. Studies have shown that the production of 1 ton of cement will cause 0.9 tons of carbon dioxide emissions. Extensive use of cement will increase carbon emissions. It is necessary to carry out research and development of cement substitute products in the field of mine filling to reduce filling costs, energy consumption and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/10E21F15/00
CPCC04B28/105E21F15/005C04B2111/00724C04B2201/50C04B18/16C04B24/126C04B2103/0001Y02W30/91
Inventor 唐朝生王殿龙泮晓华王瑞董志浩吕超程瑶佳刘浩
Owner NANJING UNIV
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