聚氨酯注浆材料因粘附性强、可注性好、固化时间可控、施工工艺简单等诸多优点被广泛应用于煤矿开采、隧道施工和土木工程等领域。然而,随着开采深度的增加和环境条件的复杂化,传统聚氨酯注浆材料在性能上逐渐显现出局限性,如强度低、导热性差、阻燃性不好等问题。因此,对聚氨酯注浆材料进行改性以提升其性能成为研究热点。综述了矿用聚氨酯注浆材料的物理改性和化学改性方法,包括纳米材料改性、纤维材料改性、复合材料改性、接枝共聚法改性以及交联改性等。最后,对聚氨酯注浆材料改性研究的发展方向进行了展望。
Polyurethane grouting materials are widely used in coal mining,tunneling and civil engineering due to their remarkable adhesion,excellent injectability,controllable curing time,uncomplicated construction process and lots of other merits.Nevertheless,with the increase of mining depth and the intricacy of environmental conditions,the performance limitations of traditional polyurethane grouting materials have become increasingly prominent,such as low strength,poor thermal conductivity,and poor flame retardancy.Consequently,the modification of polyurethane grouting materials to improve their performance has already emerged as a focal point in research.The physical and chemical modification approaches of polyurethane grouting materials in the mining context were reviewed.These methods included nanomaterial modification,fiber material modification,composite material modification,graft copolymerization modification,and cross-linking modification.Ultimately,the development directions of polyurethane grouting material modification research were prospected.
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