低黏度脲醛注浆加固材料的研制及应用

Development and application of low viscosity urea-formaldehyde resin grouting material

研究了脲醛树脂的反应机理以及甲醛释放的途径,通过聚乙烯醇(PVA)改性脲研制的醛树脂加固材料具有黏度低、可注性强、强度高的特性,用于微细颗粒状及粉末状的极破碎松软煤岩体加固时,可注入细小颗粒及粉状破碎煤岩体内,能显著提高破碎体的完整性和强度,加固效果显著.通过现场试验验证,该加固材料应用于煤矿井下可有效控制井下环境污染.

Studied the urea resin reaction mechanism as well as the formaldehyde release＇ s way, through the PVA modified material of urea-formaldehyde resin, which is low viscosity, high filling character and hard strength, it could be used for spongy and cracked coal and strata with character of minification particle and pulverous, it could fill in spongy and cracked coal and strata, improved the strength and integrity, reinforcement effect was excellent. Through test in site, it can control evolvement pollution effective in mine.