摘要
为达到预期加固效果,并确保施工安全,基于煤矿井下现场工程特点,分析了地质条件对注浆材料性能的要求,探讨了巷道不稳定的影响因素,研究了聚醚多元醇种类和异氰酸根指数对加固材料强度和韧性的影响;通过改性使材料的抗压强度高达85 MPa,黏结强度达6.2MPa,并兼具适宜的韧性。结果表明:通过改变聚醚多元醇参数和异氰酸根指数,可实现对聚氨酯加固材料强度和韧性的调控;适宜的材料性能和合理的支护方式可有效控制巷道变形,显著提高巷道稳定性。
In order to achieve the expected reinforcement effect and ensure safety of the project,this paper aims to analyze the requirements of geological conditions on the performance of grouting materials based on the characteristics of coal mine underground engineering.The effects of polyether polyols and isocyanate index on the strength and toughness of grouting materials are explored.Through the modification,the compressive strength of the material is as high as 85 MPa,the bond strength is as high as 6.2 MPa,and it has suitable toughness.The results indicate that the strength and toughness of polyurethane reinforced materials can be controlled by changing the parameters of polyether polyol and isocyanate index.The appropriate material properties and reasonable support methods can effectively prevent the deformation of the roadway and to significantly improve the stability of the roadway.
作者
潘树启
刘鲤粽
郭建伟
王玉超
于潇沣
柏广峰
于光
孙刚
PAN Shuqi;LIU Lizong;GUO Jianwei;WANG Yuchao;YU Xiaofeng;BAI Guangfeng;YU Guang;SUN Gang(State Key Laboratory of Coking Coal Resources Development and Comprehensive Utilization,China Pingmei Shenma Group,Pingdingshan 467099,China;China Pingmei Shenma Energy Chemical Group Co.,Ltd.,Pingdingshan 467000,China;Mine Oil Products Branch,China Coal Research Institute,Beijing 100013,China;State Key Laboratory of Efficient Mining and Clean Utilization of Coal Resources,Beijing 100013,China)
出处
《煤矿安全》
CAS
北大核心
2020年第9期153-156,161,共5页
Safety in Coal Mines
基金
煤炭科学技术研究院有限公司技术创新基金资助项目(2018CX04)。
关键词
巷道围岩
注浆加固
聚醚多元醇
异氰酸根指数
抗压强度
roadway surrounding rock
grouting reinforcement
polyether polyol
isocyanate index
compressive strength
