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Fireproofing extinguishing materials of composite colloid of fly ash for fire in coal bed

A technology for fly ash and fire prevention, applied in fire protection equipment and other directions, can solve the problems of easy agglomeration, deterioration, complex preparation process of composite colloid, etc., and achieve the effects of not easy agglomeration, good moisture resistance, and improved preparation process.

Inactive Publication Date: 2007-02-21
SHANGHAI DATUN ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the gelling agent used is easy to absorb water vapor and deteriorate in the environment with high humidity under the mine, and it is easy to agglomerate in the process of mixing with the slurry, and the preparation process of the composite colloid is also complicated.

Method used

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  • Fireproofing extinguishing materials of composite colloid of fly ash for fire in coal bed
  • Fireproofing extinguishing materials of composite colloid of fly ash for fire in coal bed
  • Fireproofing extinguishing materials of composite colloid of fly ash for fire in coal bed

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Experimental program
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Effect test

Embodiment 1

[0020] Composite colloid material composition:

[0021] Fly ash: water-soluble linear polymer material = 40:1.

[0022] Add the materials in the above ratio into the stirring tank and stir to mix evenly.

[0023] Yaoqiao Coal Mine 7715 light laying face has a strike length of 1320 meters, an inclination length of 187 meters, an inclination angle of 3-8 degrees, and a coal seam thickness of 5.6 meters. Mining began on September 2, 2003, and was completed on December 8, 2004. December 26 The two walls were closed, and after the working face was closed for a week, it was found that the CO gas in the two airtight walls reached 200ppm, and it was still rising.

[0024] In February 2005, the large flow glue injection system combined with the colloid preparation machine and the grouting pipe network, such as figure 1 and figure 2 As shown, 4 tons of the composite material of this embodiment is added in the downhole at a ratio of 1%, and about 400m of fly ash is injected. 3 , the...

Embodiment 2

[0026] Composite colloid material composition:

[0027] Fly ash: water-soluble linear polymer material = 40:1.

[0028] The 8516 light-handling working face is located in the third east mining area, the upper part is the 8514 goaf, the strike is 470 meters, the inclination length is 124 meters, the thickness of the coal seam is 3.7 meters, and the inclination angle is 3°. Air leakage from the cracks in the coal pillars along the empty conveying lanes caused spontaneous combustion of coal in the 8514 production line. In February 2005, the CO concentration in the closed wall of the 8514 Liuzi Road was as high as 2600ppm. Drilling holes were drilled along the 8516 material road to the 8514 Liuzi Road to inject fly ash slurry. The effect is not good (there is still 600-800ppm of CO gas in the wall), the goaf seeps seriously into the 8516 material road, and the 8516 working face cannot be produced.

[0029] In early March 2005, a colloid adding pump was installed at the 8516 mater...

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Abstract

A composite colloid for preventing and extinguishing the fire accident of coal seam is prepared from powdered coal ash and water-soluble linear high-molecular material in ratio of (40-60): 1 through mixing. It is mixed with high-concentration yellow clay sludge or powdered coal ash contained liquid before it is used.

Description

technical field [0001] The invention belongs to coal mine fire prevention and extinguishing materials, in particular to a composite colloid fire prevention and extinguishing material with fly ash as the main component. Background technique [0002] Mine fire is one of the key issues restricting the high-yield, high-efficiency and safe production of fully mechanized caving coal pillar-free mining. After a spontaneous combustion fire occurs in the comprehensive mechanized top-coal caving coal mining face, if it is not dealt with in time, it is likely to cause the fire to spread and force the working face to stop production or close, resulting in equipment damage, loss of coal resources, and even casualties. [0003] Colloid fire prevention and extinguishing technology is a new coal mine fire prevention technology developed in recent years. At present, there are three main categories of fire prevention colloid materials: silicic acid gel, polymer col...

Claims

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Application Information

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IPC IPC(8): A62D1/00
Inventor 祁和刚曹大成文虎卫功柱汪东升郭夕祥
Owner SHANGHAI DATUN ENERGY
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