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Method for manufacturing underground coal mine support rod

A technology of support rods and coal mines, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of loss of support, low flexural strength, etc., to improve production efficiency, reduce production costs, improve The effect of fluidity and uniformity

Inactive Publication Date: 2014-12-24
SHANXI XINJINGHUI SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cement-based materials can have high strength and good high-temperature performance, but low flexural strength; steel pipes have high flexural strength, but lose their support due to deformation in high-pressure or fire environments

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A coal mine underground support rod prepared by using cement-based restraint materials, characterized in that the following materials are mixed and stirred for 5 minutes according to the mass ratio to form a uniform slurry: 10 parts of cement, 20 parts of calcined coal gangue slag superfine powder, styrene-acrylic emulsion 5 parts, 3 parts of polypropylene fiber, 2 parts of zinc hydroxide, 3 parts of polycarboxylate superplasticizer, 5 parts of Yuanming powder, 10 parts of waste clay brick particles (1-5mm), sintered ceramsite (5-10mm) 20 parts, 17 parts of water.

[0014] Use a concrete pump to pour the slurry into the sealed steel pipe at the bottom of the vertical place, and at the same time use a vibrator to vibrate the steel pipe to remove air bubbles, and vibrate while pouring until it is filled, and seal the upper end of the steel pipe.

[0015] The sealed steel pipe prepared above is cured in a curing room at 100°C for 16 hours using atmospheric boiler steam or ...

Embodiment 2

[0017] A coal mine underground support rod prepared by using cement-based restraining materials, characterized in that the following materials are mixed and stirred for 5 minutes according to the mass ratio to form a uniform slurry: 5 parts of cement, 30 parts of calcined coal gangue slag superfine powder, styrene-acrylic emulsion 3 parts, 1 part of polypropylene fiber, 1 part of zinc hydroxide, 1 part of polycarboxylate superplasticizer, 8 parts of Yuanming powder, 20 parts of waste clay brick particles (1-5mm), sintered ceramsite (5-10mm) 40 parts, 17 parts of water.

[0018] Molding and curing are carried out according to the method of Example 1 to prepare the underground support rod of the coal mine.

Embodiment 3

[0020] A coal mine underground support rod prepared by using cement-based restraint materials, which is characterized in that the following materials are mixed and stirred for 5 minutes according to the mass ratio to form a uniform slurry: 10 parts of cement, 50 parts of calcined coal gangue slag superfine powder, styrene-acrylic emulsion 5 parts, 5 parts of polypropylene fiber, 3 parts of zinc hydroxide, 3 parts of polycarboxylate superplasticizer, 5 parts of Yuanming powder, 10 parts of waste clay brick particles (1-5mm), sintered ceramsite (5-10mm) 20 parts, 17 parts of water.

[0021] Use a concrete pump to pour the slurry into the sealed steel pipe at the bottom of the vertical place, and at the same time use a vibrator to vibrate the steel pipe to remove air bubbles, and vibrate while pouring until it is filled, and seal the upper end of the steel pipe.

[0022] The sealed steel pipe prepared above is cured in a curing room at 90°C for 20 hours using atmospheric boiler s...

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Abstract

The invention discloses a method for preparing an underground coal mine support rod by using a cement-based constrained material. The method comprises the step of preparing the underground coal mine support through gravity casting vibratory compaction and high-temperature maintenance by taking a hollow steel pipe as a constraining body and taking a high-rheology micro-expansible cement-based material as a filling material, wherein the high-rheology micro-expansible cement-based material is prepared from the following raw materials in weight ratio or volume ratio: 10-20% of cement, 20-50% of calcined coal gangue slag ultrafine powder, 3-5% of styrene-acrylic emulsion, 1-5% of polypropylene fiber, 1-3% of zinc hydroxide, 1-3% of polycarboxylate superplasticizer, 3-8% of anhydrous sodium sulphate, 10-20% of waste clay brick particles (1-5mm), 20-40% of sintered ceramsites (5-10mm) and a proper amount of water. The method disclosed by the invention is capable of satisfying the special requirements of light weight, high strength, high toughness, fire resistance and corrosion resistance of the underground coal mine support rod and turning harm into good by utilizing industrial residues, and is flexible in material selection, high in product strength, simple to operate, short in time, low in production cost and easy for large-scale industrial production.

Description

technical field [0001] The present invention relates to a method of using cement-based confinement materials to prepare coal mine underground support rods, in particular to a method for utilizing the high toughness of steel pipes, the high compressive strength of cement-based materials and the hydration of cement-based materials in steel pipe confinement environments. High compactness, the preparation method of light weight, high strength, fire-resistant, corrosion-resistant coal mine underground supporting parts is also applicable to the preparation of other restraining material products. It belongs to the field of civil engineering and is mainly used in coal mining engineering. Background technique [0002] The underground conditions of coal mines are harsh, high temperature, humidity and even gas explosions occur. The requirements for the support material of the mining support surface are relatively strict. It requires not only high compressive strength, but also high fle...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B18/10C04B16/06C04B18/16
CPCY02W30/91
Inventor 刘建彪任大明
Owner SHANXI XINJINGHUI SCI & TECH CO LTD
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