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Polyurethane material for reinforcing coal and rock mass in coal mine

A technology of polyurethane material and coal rock mass, which is applied in the field of polyurethane material for coal mine reinforcement, can solve the problems of unfavorable underground safety reinforcement, low reaction temperature, spontaneous combustion of coal body, etc., and achieve fast on-site construction, lower reaction temperature, Effect of improving flame retardancy

Pending Publication Date: 2022-01-18
山西潞安晋安矿业工程有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For polyurethane polymer grouting reinforcement materials used in underground coal mines, in addition to the requirements on mechanical properties, in order to ensure the safety of underground construction, it is also required to have a high flash point, environmental protection, non-toxic, and low reaction temperature and high flame retardancy, etc. However, the existing polyurethane grouting reinforcement materials for coal mines often cannot meet all the above requirements at the same time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 30Kg of polyether polyol JH303, 40Kg of polyether polyol GY420, 10Kg of chlorophosphate FR-300, and 20Kg of castor oil polyol into the reaction kettle in turn, and vacuumize under the condition of negative pressure 0.1MPa and temperature 40-50℃ After removing water for 1 hour, add 2 Kg of chlorinated paraffin, 2 Kg of flake graphite, 1 Kg of phosphate flame retardant, and 10 Kg of catalyst in sequence, stir and react for 1 hour at normal temperature and pressure, and mix well to obtain component A Material. Component B is polymethylene polyphenyl isocyanate, trade name PM-200, which is a mixture of isocyanate and diphenylmethane diisocyanate containing a certain amount of higher functionality. The catalyst is prepared by mixing dibutyltin dilaurate, tertiary amine catalyst and potassium isooctanoate in a mass ratio of 1:1:0.4.

[0022] Mix component A and component B with a pneumatic double-fluid grouting pump at high speed according to a volume ratio of 1:1 to ob...

Embodiment 2

[0024] Take 20Kg of polyether polyol JH303, 50Kg of polyether polyol GY420, 20Kg of chlorophosphate FR-300, and 30Kg of castor oil polyol into the reaction kettle in turn, and vacuumize under the condition of negative pressure 0.1MPa and temperature 40-50℃ After removing water for 1 hour, add 4 Kg of chlorinated paraffin, 4 Kg of flake graphite, 2 Kg of phosphate flame retardant, and 20 Kg of catalyst in sequence, stir and react for 1 hour at normal temperature and pressure, and mix well to obtain component A Material. Component B is polymethylene polyphenyl isocyanate, trade name PM-200, which is a mixture of isocyanate and diphenylmethane diisocyanate containing a certain amount of higher functionality. The catalyst is formed by mixing dibutyltin dilaurate, a tertiary amine catalyst, and potassium isooctanoate in a mass ratio of 1:1:0.3.

[0025] Component A and component B were mixed at high speed by a pneumatic double-fluid grouting pump at a volume ratio of 1:1 to obtain...

Embodiment 3

[0027] Take 30Kg of polyether polyol JH303, 50Kg of polyether polyol GY420, 15Kg of chlorophosphate FR-300, and 25Kg of castor oil polyol into the reaction kettle in turn, and vacuumize under the condition of negative pressure 0.1MPa and temperature 40-50℃ After removing water for 1 hour, add 3 Kg of chlorinated paraffin, 3 Kg of flake graphite, 1.5 Kg of phosphate flame retardant, and 15 Kg of catalyst in sequence, stir and react for 1 hour at normal temperature and pressure, and mix well to obtain component A Material. Component B is polymethylene polyphenyl isocyanate, trade name PM-200, which is a mixture of isocyanate and diphenylmethane diisocyanate containing a certain amount of higher functionality. The catalyst is formed by mixing dibutyltin dilaurate, tertiary amine catalyst, and potassium isooctanoate in a mass ratio of 1:1:0.5.

[0028] Component A and component B were mixed at high speed by a pneumatic double-fluid grouting pump at a volume ratio of 1:1 to obtain...

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PUM

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Abstract

The invention belongs to the technical field of chemical grouting reinforcement of coal and rock masses, and particularly relates to a polyurethane material for reinforcing coal and rock mass in a coal mine. The material is composed of a component A and a component B, the component A comprises polyether polyol with a functional group of 6, castor oil polyol and auxiliaries, and the component B comprises a polyisocyanate prepolymer; the volume ratio of the component A to the component B is (1-1.5): 1; the auxiliaries comprise a compound flame retardant and a catalyst, the compound flame retardant is formed by mixing chlorinated paraffin, flake graphite and a phosphate flame retardant according to the mass ratio of 1: 1-3: 0.5, and the addition amount of the phosphate flame retardant is smaller than or equal to 4% of the mass of the component A; the material has the advantages of low reaction temperature, excellent mechanical property and flame retardant property, and is suitable for safe reinforcement of the coal seam under the mine.

Description

technical field [0001] The invention belongs to the technical field of chemical grouting reinforcement of coal and rock mass, and relates to a polyurethane material for coal mine reinforcement of coal and rock mass. Background technique [0002] During the underground mining construction of coal mines, due to the geological structure, primary fissures, and the broken coal and rock mass formed by the influence of mining pressure, etc., the roadway cofferdam, roof, working face, etc., especially the loose coal (rock) mass are easily collapsed. risk, affecting safe production. Especially with the popularization of large-scale comprehensive mining equipment, it is necessary to maintain the mining roadway, chamber, working face and roof during the coal mining process. Chemical grouting reinforcement technology can change the loose structure of surrounding rock in time, improve the overall strength of rock mass, thereby increasing the construction speed and ensuring the normal su...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08L91/06C08K3/04C08K5/521C08G18/66C08G18/48C08G18/36C08G18/24C08G18/22C08G18/18
CPCC08L75/08C08G18/6696C08G18/4804C08G18/36C08G18/246C08G18/18C08G18/225C08L2201/02C08L91/06C08K3/04C08K5/521
Inventor 冯洁王留着邵燕飞白广平王华丹孙鹏飞周娜宋旭昇曹鹏飞
Owner 山西潞安晋安矿业工程有限责任公司