Low-temperature modified grouting reinforcement material

A grouting reinforcement, low-temperature technology, applied in the field of coal seam filling, reinforcement and bonding, and surrounding rock, can solve problems such as explosion and natural coal, and achieve the effect of avoiding potential safety hazards and preventing spontaneous combustion of coal.

Inactive Publication Date: 2020-01-10
淮南东华欧科矿山支护设备有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a low-temperature modified grouting reinforcement material to solve the problem that the temperature of the polyurethane material in the above-mentioned background technology is too high during the reaction to generate heat accumulation, which will lead to coal naturalization caused by temperature rise, and explosion in severe cases. question

Method used

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  • Low-temperature modified grouting reinforcement material

Examples

Experimental program
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Effect test

example 1

[0034] A low-temperature modified grouting reinforcement material, which is made by mixing materials A and B in equal volumes. Material A is made of 90% water glass, 0.5% catalyst (ZR70), 4% polyol and water, and material B 50% polyisocyanate, 6.75% polyether polyol, 4% oligoether polyol, 6.75% diethylene glycol, 12% complex vegetable ester, 2% silicone, 4% triphosphate Ethyl chloride and 1% antioxidant mixed.

[0035] Mix the weighed components of material A and material B according to 1:1 equal volume, and then stir in the container for 90-100s through the stirring device, then quickly insert the thermometer into the container containing the material, and measure the temperature produced by the material. The temperature is 80°C, which is below the critical temperature for coal mines. It will not cause coal mines to spontaneously ignite and explode with high concentrations of dust in the air. It is a safe temperature and meets the low temperature characteristics of the materi...

example 2

[0037] A low-temperature modified grouting reinforcement material, which is made by mixing materials A and B in equal volumes, and material A is mixed with 90% water glass, 0.5% catalyst (ZR70), 4% polyol, water and antistatic agent Formed, material B consists of 60% polyisocyanate, 8% polyether polyol, 5% oligoether polyol, 8% diethylene glycol, 15% compound vegetable ester, 2% silicone, 4% trichloroethyl phosphate and 2% antioxidant.

[0038] Mix the weighed components of material A and material B according to the equal volume of 1:1, and then stir in the container for 90-100 seconds through the stirring device, and quickly pour the uniformly stirred reinforcement material into the mold, and the material solidifies rapidly , After the material in the mold is taken out, its compressive strength is measured to be 41.3Mpa, and the measured material strength meets the strength required by the state.

example 3

[0040] A low-temperature modified grouting reinforcement material, which is made by mixing materials A and B in equal volumes. Material A is made of 90% water glass, 0.5% catalyst (ZR70), 4% polyol and water, and material B 60% polyisocyanate, 8% polyether polyol, 3% oligoether polyol, 8% diethylene glycol, 10% complex vegetable ester, 2% silicone, 4% triphosphate Ethyl chloride and 1% flame retardant are mixed with 2‰ carbon fiber.

[0041] Mix the weighed components of material A and material B according to the equal volume of 1:1, and then stir in the container for 90-100 seconds through the stirring device, and quickly pour the uniformly stirred reinforcement material into the mold, and the material solidifies rapidly After the material in the mold is taken out, its compressive strength is measured to be 48.9Mpa, which is significantly higher than the national standard strength. Therefore, this experiment shows that the addition of carbon fiber will increase the overall co...

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Abstract

The invention discloses a low-temperature modified grouting reinforcement material. The low-temperature modified grouting reinforcement material is formed by mixing a material A with a material B in an isopyknic manner, wherein the material A is composed of water glass, a catalyst (ZR70) and polyol; and the material B is composed of polyisocyanate, polyether polyol, composite plant ester, a flameretardant and an antistatic agent. The temperature generated by a reaction of the material is controlled at 67-80 DEG C, so heat accumulation is reduced after grouting, and spontaneous combustion of coal is well prevented. No harmful gas is generated, so the health and safety of constructors are guaranteed. The material has good fluidity at the initial stage of the reaction, and can rapidly permeate into surrounding rocks and coal seam fracture spaces to fill and reinforce surrounding rocks and coal seams. The material has a high adhesion and a short solidification time, and the compressive strength after solidification can reach 40 MPa or above, so that surrounding rocks and coal seams are wholly stable, and are not prone to flaking.

Description

technical field [0001] The invention relates to the technical field of surrounding rock and coal seam filling reinforcement bonding, in particular to a low-temperature modified grouting reinforcement material. Background technique [0002] At present, coal mining in my country is still an important industrial development. There are still many mining problems in the mine. In deep coal mine mining, the underlying coal mine structure is huge and complex. Once the surrounding rock and coal seam gap are too large during mining When it is broken or loose, it will increase the difficulty of mining and easily cause accidents. There are still many deficiencies in the existing coal mining technology, such as injecting industrial cement into the coal seam gap, the cement curing period is long, which seriously delays the mining efficiency, or using polyurethane materials, but the cost of polyurethane materials is higher , And it will emit a huge amount of heat during the reaction. When ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/36C08K3/34C08K5/521
CPCC08G18/36C08G18/4804C08G18/6696C08K3/34C08K5/521
Inventor 张辉
Owner 淮南东华欧科矿山支护设备有限责任公司
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