高性能无机-有机复合注浆材料研究  

Research of high performance inorganic-organic composite grouting materials

作　　者：管学茂[1,2] 张海波 杨政鹏[1,2] 李海艳 路建军[3] 狄红丰 帅波[1] 徐驰 王国普 GUAN Xuemao;ZHANG Haibo;YANG Zhengpeng;LI Haiyan;LU Jianjun;DI Hongfeng;SHUAI Bo;XU Chi;WANG Guopu(School of Materials Science and Engineering,Henan Polytechnic University,Jiaozuo 454003,China;Henan Key Laboratory of Materials on Deep-Earth Engineering,Jiaozuo 454003,China;Xinji Energy Co.,Ltd.,China National Coal Group Corp.,Huainan 232170,China)

机构地区：[1]河南理工大学材料科学与工程学院,河南焦作454003 [2]河南省深地材料科学与技术重点实验室,河南焦作454003 [3]中煤新集能源股份有限公司,安徽淮南232170

出　　处：《煤炭学报》2020年第3期902-910,共9页Journal of China Coal Society

基　　金：国家重点研发计划资助项目(2017YFC0603004);河南省自然科学基金资助项目(182300410207)。

摘　　要：针对千米深井巷道围岩大变形控制难题,提出了支护-改性-卸压“三位一体”协同控制技术,其中要求注浆改性材料具有“高渗透、高强度、高黏结”性能。“高渗透”可以通过减小粒度、增加界面润湿性来实现;“高强度”可以通过优选快速水化矿物,添加纳米增强材料来实现;“高黏结”可以通过添加有机调节剂,增加界面润湿并形成强化学键来实现。本文以超细化的硫铝酸盐水泥熟料、石膏、石灰为主要原料,通过优化配比研发了无机注浆材料,材料粒径D 95<7.0μm,最佳配比为硫铝酸盐水泥熟料、石膏、石灰质量比5∶4∶1;合成了纳米锂铝类水滑石增强材料,具有锂离子增强和纳米晶核诱导结晶双重协同增强作用,当掺量为无机注浆材料质量的2%时,抗压强度提高145%,达到12.3 MPa;采用“一锅法”合成了两亲性有机调节剂,掺量为无机注浆材料质量的3%时,可以将水与煤表面接触角从72.80°减小到19.23°,并在注浆材料与裂隙表面间形成氢键作用,显著改善界面润湿性,增加界面黏接强度。以无机注浆材料、纳米锂铝类水滑石、有机调节剂按95%,2%,3%的质量百分比混合制备了微纳米注浆材料,材料初、终凝时间分别为8.0,13.0 min,2 h抗压强度为10.2 MPa,煤的黏结强度大于煤自身拉伸断裂强度。微纳米注浆材料在口孜东矿进行了超前注浆应用,可以良好注入10μm开度的裂隙,与裂隙表面结合紧密,锚杆拉拔力由注浆加固前的37 kN提高到注浆后的145 kN。To address the issue of controlling the large deformation of surrounding rock in the roadway with more than 1000 m depth,the project“strata control and intelligent mining technology in coal mines at 1000 m depth”sponsored by National Key Research and Invention Program,proposes the“three-in-one”cooperative control technology,which is for bolting-grouting-destressing of coal mine roadways.The properties of“high permeability,high strength and high bonding”are required for grouting materials.“High permeability”can be achieved by reducing particle size and increasing interface wettability,“High strength”can be achieved by selecting minerals which hydrate rapidly and“High bonding”can be achieved by adding organic modifier which can improve wettability and bonding strength by mechanical bonding.In this study,the superfine sulphoaluminate cement clinker,anhydrite and lime were selected to make inorganic grouting material by optimizing their ratio.The particle size D 95 of the materials was less than 7.0μm,the optional ratio of sulphoaluminate cement clinker,anhydrite and lime was 5∶4∶1.Nano lithium aluminum hydrotalcite(LiAl-LDH),which had the synergistic effect of lithium ion enhancement and nano-crystalline inducing crystallization,was synthesized to accelerate the hydration of inorganic grouting material.When the content of LiAl-LDH was 2%of inorganic grouting material,the compressive strength was increased by 145%and reached 12.3 MPa.The amphiphilic organic modifier was synthesized by“one-pot method”,when its content was 3%of inorganic grouting material,the contact angle between water and coal surface could be reduced from 72.80°to 19.23°.Hydrogen bonding was formed between the grouting material and the crevice surface,significantly improving the wettability of the interface and increasing the bonding strength of the interface.The micro-nano grouting materials were prepared by mixing inorganic grouting materials,nano-LiAl-LDH and organic modifier with 95%,2%and 3%mass percentages,re

关 键 词：千米深井 微纳米注浆材料 纳米增强 有机调节剂 黏结强度 

分 类 号：TD353[矿业工程—矿井建设]