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Foamable phenolic resin strengthening and filling material for coal mine

A technology of foaming phenolic resin and filling material, which is applied in mining equipment, wellbore lining, tunnel lining and other directions, can solve the problems of difficulty in using inorganic reinforcing materials, eliminate hidden dangers of accidents, small crack width, etc., and achieves adjustable curing speed, The effect of adjustable foaming ratio and strong bond strength

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 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 eliminated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The composition of component A curing agent is: toluenesulfonic acid 85Kg, benzenesulfonic acid 15Kg, phosphoric acid 100Kg, dissolve and mix evenly for later use.

[0039] Weigh 15Kg of 30% KOH solution and 400Kg of molten phenol into the reaction kettle, heat and stir to 75°C, start adding paraformaldehyde, and divide 250Kg of paraformaldehyde six times within 1 hour at a temperature of 80-85°C Add it into the reaction kettle, after adding, raise the temperature to 95°C within 30 minutes, and keep the reaction at this temperature for 20 minutes. Then add 80Kg of urea and keep it warm at 85°C for 30 minutes. Finally, add 100Kg of water to dilute and stir evenly to obtain a urea-modified phenolic resin with a solid content of 86.92%.

[0040] Take 100Kg of the urea-modified phenolic resin with a solid content of 86.92% prepared above, cool down to 60°C, add 5Kg DMMP, 1.25Kg aluminum hydroxide, 10Kg Tween-80 and 10Kg ethylene glycol in turn, stir and mix evenly, and con...

Embodiment 2

[0043] The composition of component A curing agent is: toluenesulfonic acid 85Kg, benzenesulfonic acid 15Kg, hydrochloric acid 70Kg, dissolve and mix evenly for later use.

[0044] Weigh 19.25Kg of 30% NaOH solution and 385Kg of molten phenol into the reaction kettle, and start adding 200Kg of paraformaldehyde when heating and stirring to 78°C, and keep the temperature at 80-85°C during the feeding process. The temperature was raised to 95° C., and the reaction was kept at this temperature for 20 minutes. Then add 65Kg of urea, and keep the reaction at 85°C for 30 minutes. Finally, add 300Kg of water to dilute and stir evenly to obtain a urea-modified phenolic resin with a solid content of 67.66%.

[0045]Take 100Kg of the urea-modified phenolic resin with a solid content of 67.66% prepared above, cool down to 65°C, add 5Kg TCEP, 1.25Kg magnesium hydroxide, 10Kg Tween-80 and 10Kg ethylene glycol in turn, stir and mix evenly, and continue to cool down To 35°C, add 4.5Kg of HC...

Embodiment 3

[0048] The composition of component A curing agent is: toluenesulfonic acid 85Kg, sulfuric acid 3Kg, phosphoric acid 100Kg, dissolve and mix evenly for later use.

[0049] Weigh 23Kg of 30% KOH solution and 350Kg of molten phenol into the reaction kettle, start adding paraformaldehyde when heating and stirring to 75°C, keep the temperature at 80-85°C during the feeding process, and add more than 200Kg in multiple times within 1 hour POM, then raise the temperature to 95°C within 30 minutes and keep it warm for 20 minutes. Then add 72Kg of urea and keep it warm at 85°C for 30 minutes. Finally, 200Kg of water was added to dilute and stir evenly to obtain a urea-modified phenolic resin with a solid content of 74.21%.

[0050] Take 100Kg of the urea-modified phenolic resin with a solid content of 74.21% prepared above, cool down to 60°C, add 5Kg DMMP, 1.25Kg magnesium hydroxide, 10Kg silicone oil foam stabilizer AK-158 and 10Kg ethylene glycol in turn, stir and mix Evenly, conti...

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Abstract

The invention relates to a foamable phenolic resin strengthening and filling material for coal mine. In the foamable phenolic resin strengthening and filling material for coal mines, a component A is one of inorganic acid and organic acid or a mixture of inorganic acid and organic acid; and a component B is prepared by mixing 90 to 100 weight parts of urea modified phenolic resin with solid content of 65 to 90 weight percent, 6 to 10 weight parts of composite fire retardant, 0 to 15 weight parts of foaming agent, 1 to 5 weight parts of stabilizing agent, 1 to 15 weight parts of cosolvent, 2 to 16 weight parts of antistatic agent and 10 to 30 weight parts of plasticizer, stirring at the temperature of between 30 and 50 DEG C and reacting for 0.5 to 2 hours. When the foamable phenolic resin strengthening and filling material is used, the component A and the component B are mixed and injected into a coal (rock) layer according to the weight ratio of (1-2) : 1 and permeated into small cracks to expand and generate curing reaction for strengthening and sealing the region. According to the foamable phenolic resin strengthening and filling material for coal mines, the compressive strength is more than 40 MPa; the bonding strength is more than or equal to 3.0 MPa; and the foaming coefficient is less than or equal to two times. The foamable phenolic resin strengthening and filling material for coal mines can meet the requirement of coal mine on safety production and can be applied to the industries such as hydroelectric powder, buildings, mining, traffic and the like.

Description

technical field [0001] The invention relates to a material for bonding, reinforcing and filling coal (rock) bodies in coal mines and related industries, and more specifically relates to a foamable phenolic resin reinforcement 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, ...

Claims

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Application Information

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IPC IPC(8): C08L61/34C08G14/08C08K13/02C08K3/16C08K3/30C08K3/32C08K5/42C08K3/22C08K5/521C08K5/5333C08J9/14E21D11/00
Inventor 陈守东赵鑫陈璐杨月华
Owner SHANXI ZHAOXIN BIO TECH
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