Polyurethane reinforcing and filling materials for coal mine

A filling material and polyurethane technology, which is applied in the field of polyurethane reinforcement and filling materials for coal mines, can solve the problems of difficult construction, small crack width, time-consuming and other problems, and achieve the effect of adjustable curing speed, high strength of solidified body and good fluidity

Active Publication Date: 2012-07-11
SHANXI ZHAOXIN BIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 5. Although there are fissures formed in the underground broken coal and rock mass due to the original or mining impact, the width of the fissures is small, so it is difficult to use inorganic reinforcement materials
[0012] Coal mines in my count

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Component A is polymethylene polyphenyl isocyanate produced by Yantai Wanhua Polyurethane Co., Ltd., trade name PM-200, which is a mixture of isocyanate and diphenylmethane diisocyanate containing a certain amount of higher functionality, NCO ( wt %) 30.2 to 32.0.

[0037] Get polyether polyol YD-4450 240Kg, YD-982 170Kg, polyester polyol YZ-350 300Kg, foam stabilizer triethanolamine 6.5Kg, silicone oil foam stabilizer AK-158 4.0Kg, α-methylstyrene 4.0 Kg, N,N-dimethylcyclohexylamine 5.4Kg, di-n-octyltin dilaurate 0.4Kg, dibutyl phthalate 120Kg, TCEP 30Kg, DMMP 120Kg, dodecyltrimethylammonium chloride 2Kg Sequentially add to the reaction kettle, stir and react at 30-50°C for 0.5-2 hours, and mix evenly to obtain component B material.

[0038] Component A and component B were mixed at high speed by a pneumatic double-fluid grouting pump according to the weight ratio of 1:1 to obtain a consolidated body, and its performance was tested. The foaming ratio was 1.5 times, th...

Embodiment 2

[0040] Component A selects polymethylene polyphenyl isocyanate produced by Yantai Wanhua Polyurethane Co., Ltd., with a trade name of PM-200.

[0041] Get polyether polyol YD-4450 400Kg, polyester polyol YZ-320 170Kg, YZ-350 100Kg, foam stabilizer triethanolamine 6.5Kg, silicone oil foam stabilizer AK-158 4.0Kg, α-methylstyrene 4.0 Kg, 33% triethylenediamine 5.3Kg, stannous octoate 0.5Kg, dibutyl phthalate 120Kg, TCEP 30Kg, DMMP 120Kg, dichloromethane 100Kg, chlorofluorocarbon 141B 40Kg, dodecyltrimethyl Add 50Kg of ammonium chloride in turn into the reaction kettle, stir and react at 30-50°C for 0.5-2 hours, and mix evenly to obtain component B material.

[0042] The A component and the B component were mixed at a high speed by a pneumatic double-fluid grouting pump according to the weight ratio of 1:1 to obtain a consolidated body, and its performance was tested. The foaming ratio was 30 times, and the compressive strength (10% compression deformation) was 159MPa, (70% pres...

Embodiment 3

[0044] Component A selects polymethylene polyphenyl isocyanate produced by Yantai Wanhua Polyurethane Co., Ltd., with a trade name of PM-200.

[0045]Get polyether polyol DL-400 240Kg, YD-982 170Kg, polyester polyol YZ-320 300Kg, foam stabilizer triethanolamine 6.5Kg, silicone oil foam stabilizer AK-158 4.0Kg, α-methylstyrene 4.0 Kg, N,N-dimethylcyclohexylamine 5.4Kg, di-n-octyltin dilaurate 0.4Kg, diisobutyl phthalate 120Kg, TCEP 30Kg, DMMP 120Kg, dodecyltrimethylammonium chloride Add 2Kg to the reaction kettle one by one, stir and react at 30-50°C for 0.5-2 hours, and mix evenly to obtain component B material.

[0046] Component A and component B were mixed at high speed by a pneumatic double-fluid grouting pump according to the weight ratio of 1:1 to obtain a consolidated body, and its performance was tested. The foaming ratio was 1.5 times, the compressive strength was 56MPa, and the tensile strength was 24.6MPa. Adhesive strength 5.0MPa, flame retardant performance: blow...

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Abstract

The invention relates to a polyurethane reinforcing and filling materials for coal mines. A component A is a polymethylene polyphenyl isocyanate, a component B is obtained via the follow steps: mixing and stirring the following ingredients: 33 to 70 wt% of polyether polyol, 0 to 40 wt% of polyester polyol, 0.1 to 1.5 wt% of composite catalyst, 6 to 30 wt% of composite flame retardant, 0 to 15 wt%of foaming agent, 0.5 to 2.5 wt% of stabilizer, 0.5 to 10 wt% of foam stabilizing agent, 0.1 to 5 wt% of antistatic agent , 5 to 25 wt% of plasticizer at 30 DEG C to 50 DEG C for 0.5 to 2 hrs; and when in use, the component A and the component B are together pressed into a coal (rock) layer according to the mass ratio of 1 to 2 : 1, penetrate into tiny cracks and expand, meanwhile react and generate CO2 gas and further expand, thereby effectively reinforcing and sealing processing areas. The compressive strength of polyurethane reinforcing and filling materials for coal mines is more than 55 MPa, the bond strength is more than or equal to 4 MPa, the foaming factor is less than or equal to two times. The invention can meet the need of coal mine safe production, and can be used for hydropower, construction, mining, transportation and other industries.

Description

technical field [0001] The invention relates to a material used for bonding, reinforcing and filling coal (rock) bodies in coal mines and related industries, and more specifically relates to a polyurethane reinforcing and filling material. Background technique [0002] Under the action of mine pressure, roadway cofferdams, roofs, working faces, etc., especially loose coal (rock) bodies are very easy to collapse, which brings hidden dangers to production safety. Especially with the popularization of large-scale fully mechanized mining equipment, it is necessary to maintain the mining roadway, chamber, working face and roof during the coal mining process. [0003] Grouting technology has been widely used in various geotechnical engineering since the 1950s. Grouting materials are divided into cement and chemical materials, which are used for different types of projects. In the 1970s, countries with advanced coal mining technologies such as Germany, the United States, the Comm...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/48C08G18/42C08K5/521C08K5/5333C08K5/17C08J9/14C08L75/06C08L75/08
Inventor 陈守东赵鑫陈璐杨月华
Owner SHANXI ZHAOXIN BIO TECH
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