Material for reinforcement of coal and rock and preparation process and application thereof

A preparation process and a technology for coal and rock, which are applied to the material used for coal and rock reinforcement, the preparation process thereof, and the application field of the material, can solve the problems of small diffusion radius of slurry, poisoning, etc., and achieve easy planing and cutting, high viscosity The effect of low, strong bond strength

Inactive Publication Date: 2010-06-23
滕州市华海新型保温材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyurethane grout swells and reacts with water, but it is easy to block channels in micro-cracked rock mass, resulting in a smaller diffusion radius of the grout
Urea-formaldehyde resin + acrylamide slurry is actually a mixture of urea-formaldehyde resin slurry and acrylamide. A 2-N methylene acrylamide material is used as an auxiliary material in the slurry. The monomer of this material has a large High toxicity. Although there is no report of water poisoning in China, there are reports of Japanese people being poisoned by grouting in relevant literature. This kind of grouting material has been banned by the government in Japan

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] 1. Preparation of basic raw materials of modified phenolic resin

[0031] The basic raw material of modified phenolic resin is prepared by using resole phenolic resin, toughening agent, fireproof polyether and methanol, and heating under alkaline conditions to form an interpenetrating network structure through copolymerization and condensation to make modified phenolic resin. The resole phenolic resin has a high concentration of methylol groups, a low moisture content of less than 2.0%, a viscosity of 300-500 mPas, and a hydroxyl value of the fireproof polyether of 200-300. Toughening agents are mainly polyethylene glycol and polypropylene glycol. The modified phenolic resin is polymerized under the basic condition of methanol solvent.

[0032] The ratio of raw materials for preparing modified phenolic resin (in parts by mass) is: 100 parts of resole phenolic resin, 10-20 parts of polyethylene glycol, 3-8 parts of polypropylene glycol, 5-10 parts of fireproof polyether...

Embodiment 1

[0046] Mix 100 parts of resole phenolic resin, 10 parts of polyethylene glycol, 3 parts of polypropylene glycol, 5 parts of fireproof polyether, and 50 parts of methanol in parts by mass, and add sodium hydroxide to adjust the pH value when the components are mixed evenly. Under the conditions of 8-9, the reaction temperature is between 70 degrees. React for 90 minutes, stop heating. Add oxalic acid to neutralize and adjust the pH value to 6-7, then vacuum demethanol to adjust the viscosity to 1000mpa.s under the condition of 25 degrees to obtain the modified phenolic resin. According to the mass parts, 100 parts of modified phenolic resin, 3 parts of foaming agent (foaming agent is 141b), 2 parts of emulsifier, and 2 parts of auxiliary agent are stirred evenly to form material A. According to the parts by mass, 100 parts of methanesulfonic acid, 30 parts of phenolsulfonic acid, 20 parts of benzenesulfonic acid and 20 parts of water are stirred evenly to form material B. Acc...

Embodiment 2

[0048] Mix 100 parts of resole phenolic resin, 13 parts of polyethylene glycol, 3 parts of polypropylene glycol, 6 parts of fireproof polyether, and 60 parts of methanol in parts by mass, and adjust the pH value to 8-9 when all components are mixed evenly. Under conditions, the reaction temperature is between 65 degrees. React for 150 minutes, stop heating. Add acid to neutralize the pH value to 6-7, then vacuum demethanol to adjust the viscosity to 1500mpa.s under the condition of 25 degrees to obtain the modified phenolic resin. According to the parts by mass, 100 parts of modified phenolic resin, 1 part of foaming agent is 141b, 2 parts of emulsifier, and 2 parts of auxiliary agent are stirred evenly to form material A. According to the parts by mass, 100 parts of methanesulfonic acid, 15 parts of phenolsulfonic acid, 15 parts of benzenesulfonic acid and 50 parts of water are stirred evenly to form material B. According to the volume fraction, the expandable modified phen...

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Abstract

The invention relates to a material for reinforcement of coal and rock and a preparation process and application thereof. In the technical scheme, resol, a plasticizer, fire-resistance polyether and methanol are used as raw materials and are heated under alkaline conditions to form modified phenolic resin with an inter-penetrating structure through copolymerization and condensation, the modified phenolic resin is then mixed with an organic acid catalyst system by a pump, and the mixture is then poured into a broken coal and rock to be cured and to be closely combined with the coal and rock. The preparation process comprises preparation of the modified phenolic and preparation of the coal and rock curing material. The modified phenolic resin has low viscosity and can infiltrate into tiny cracks. The cured phenolic material has excellent bounding capacity and can achieve strong viscosity with the formation. Due to the excellent flexibility properties, the material can withstand the subsequent formation movement without retardant fire, thereby improving the safety of underground operation. Moreover, the material can not affect the mineability of coal, and can be easily planed and cut, thereby realizing the easy breakage of large coal lumps bonded together.

Description

technical field [0001] The present invention relates to a kind of coal and rock reinforcement material used for strengthening the broken coal rock roof and roadway roof reinforcement and its preparation process and the application of the material, especially relates to a modified phenolic resin as the basic raw material production and its on-site pouring and solidification Materials used in coal and rock reinforcement and their preparation process, as well as the application of the material in coal and rock reinforcement. Background technique [0002] In order to ensure safe mine production, the broken roof must be strengthened in advance to effectively control the collapse of the surrounding rock. The currently used mining chemical grout mainly includes polyurethane grout, urea-formaldehyde resin + acrylamide grouting material, and epoxy resin grouting material. pulp material. Polyurethane grout swells and reacts with water, but it is easy to block channels in micro-cracke...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/04C08G8/36C08L61/14C08G81/00C08L87/00C04B26/12C04B38/02E21D17/00
Inventor 钟东南孙助海孙志武杨建中张经泽孙浩严来春
Owner 滕州市华海新型保温材料有限公司
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