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Filling sealing material for coal mine

A technology for coal mines and amine catalysts, applied in other chemical processes, chemical instruments and methods, etc., can solve the problems of high reaction temperature, large toxic gas, and high price, and achieves low labor intensity, convenient and fast construction, and excellent flame retardancy. Effect

Inactive Publication Date: 2015-11-04
DATONG COAL MINE GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently used polyurethane filling and sealing materials have the disadvantages of high price, flammability, high reaction temperature, and a large amount of toxic gas generated during the reaction.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A filling and sealing material for coal mines, comprising A component and B component; wherein, the weight ratio of A component and B component is 1:1.

[0026] The A component is 122.65kg, which is composed of the following components after mixing:

[0027] Trifunctional polyether polyol 80kg,

[0028] Difunctional polyether polyol 10kg,

[0029] Amino polyether polyol 10kg,

[0030] Dibutyltin dilaurate 0.1kg,

[0031] Triethylenediamine 0.05 kg,

[0032] Silicone oil 0.5 kg,

[0033] Dimethyl methyl ester (DMMP) 14 kg,

[0034] Tris(1,3-dichloro-2-propyl) phosphate (TDCP) 6 kg,

[0035] 2kg of water.

[0036] The B component is 122.65 kg of isocyanate.

[0037] When in use, component A and component B are simultaneously injected into the caving hole or hollow wall of the roadway through the grouting equipment to make it foam and harden in a short period of time to form a dense, pressure-bearing and elastic concrete structure. The foam is used to fill the ...

Embodiment 2

[0039] A filling and sealing material for coal mines, comprising A component and B component; wherein, the weight ratio of A component and B component is 1:1.

[0040] The A component is 1226.5kg, which is composed of the following components after mixing:

[0041] Trifunctional polyether polyol 800kg,

[0042] Difunctional polyether polyol 100kg,

[0043] Amino polyether polyol 100kg,

[0044] Dibutyltin dilaurate 1kg,

[0045] Triethylenediamine 0.5 kg,

[0046] TW-80 5kg,

[0047] Dimethyl methyl phosphate 140kg,

[0048] Tris (1,3-dichloro-2-propyl) phosphate 60 kg,

[0049] 30kg of water.

[0050] The B component is 1236.5kg of isocyanate.

[0051] When in use, component A and component B are simultaneously injected into the caving hole or hollow wall of the roadway through the grouting equipment to make it foam and harden in a short period of time to form a dense, pressure-bearing and elastic concrete structure. The foam is used to fill the roof of the closed...

Embodiment 3

[0053] A filling and sealing material for coal mines, comprising A component and B component; wherein, the weight ratio of A component and B component is 1:1.

[0054] The A component is 249.3kg, which is composed of the following components after mixing:

[0055] Trifunctional polyether polyol 160kg,

[0056] Difunctional polyether polyol 20kg,

[0057] Amine polyether polyol 20kg,

[0058] Stannous octoate 0.2kg,

[0059] Triethylamine 0.1kg,

[0060] TW-60 1 kg,

[0061] Dimethyl methyl benzoate 28kg,

[0062] Tris(1,3-dichloro-2-propyl) phosphate 12 kg,

[0063] Water 8kg.

[0064] Described B component is isocyanate 249.3kg.

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Abstract

The invention relates to filling and sealing of a roof falling hole inside a coal mine tunnel, in particular to a chemical macromolecule grouting filling sealing material. The material comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 1:1. The component A comprises a three-functional-group polyether polyol, a two-functional-group polyether polyol and an amido polyether polyol, wherein the ratio of the three-functional-group polyether polyol to the two-functional-group polyether polyol to the amido polyether polyol is 8:1:1; additives including, by weight, 0.1% of a metallic tin catalyst, 0.05% of an amine catalyst, 0.5% of a foam stabilizer, 14% of a fire retardant DMMP, 6% of a fire retardant and 2-4% of water are added on the basis of the polyether polyol. All the components form the component A after being directly mixed. The component B is isocyanate. The material is reasonable in design, construction is convenient and rapid, labor intensity is low, efficiency is high, no hazardous gas is generated, the reaction temperature is lower than 80 DEG C, the foaming ratio is larger than 40 folds, and the compressive strength reaches 80 kPa when the compressive strain is 10%.

Description

technical field [0001] The invention relates to a filling and sealing technology for caving holes in coal mine roadways, in particular to a chemical polymer grouting filling and sealing material. Background technique [0002] During coal mine excavation and mining operations, it is inevitable that caving, slabs, and holes will occur. These holes often cause gas accumulation, which not only increases the risk of gas explosion, but also causes spontaneous combustion in coal seams with spontaneous combustion tendency. Therefore, only by filling these holes in time can safe production be ensured. Coal mines in my country usually use methods such as erecting wooden stacks and filling mortar at the site of the fall, but these methods are time-consuming, laborious, and difficult to construct, and cannot guarantee that the hidden dangers of accidents will be truly eliminated. In addition, the goaf is not isolated, which affects underground ventilation. The traditional domestic exp...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08K5/5333C08K5/521C08G18/48C09K3/10
Inventor 于斌于春兰田利军席继宏常晓华禹秀英付茂全李永梅刘轶许丽丽
Owner DATONG COAL MINE GRP
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