摘要
随着矿产资源的持续大规模开采,采空区的形成数量与面积不断增加,水泥/粉煤灰注浆体系作为治理采空区的重要手段,存在着泌水率过高、早期强度偏低以及收缩变形过大等诸多问题,因此,围绕水泥-CFB灰采空区注浆充填材料展开探究,通过室内试验剖析该材料的工作性能、体积稳定性和力学性能,推荐了最佳的材料组成,并进行工程应用和效果评价。试验结果表明,该注浆材料在流动性、结石率、强度发展等关键性能指标上表现卓越,能够切实有效地解决采空区注浆充填过程中所面临的诸多复杂问题。
With the continuous large-scale exploitation of mineral resources,the number and area of goaf formation are constantly increasing.The cement/fly ash grouting system,as an important means of treating goaf,has many problems such as excessive bleeding rate,low early strength and excessive shrinkage deformation.Therefore,this study focuses on the exploration of grouting filling materials for cement-CFB ash goaf.The working performance,volume stability and mechanical properties of the material were analyzed through indoor experiments.The optimal material composition was recommended,and the engineering application and effect evaluation were carried out.The experimental results show that this grouting material performs outstandingly in key performance indicators such as fluidity,stone rate and strength development,and can effectively solve many complex problems faced in the grouting and filling process of goed-out areas.
作者
曹学卫
荣亚鹏
CAO Xuewei;RONG Yapeng(Fenshi Branch of Shanxi Transportation Holdings Group Co.,Ltd.,Luliang 032300,China;Shanxi Transportation Technology Research&Development Co.,Ltd.,Taiyuan 030000,China)
出处
《四川建材》
2025年第12期11-13,18,共4页
Sichuan Building Materials
基金
山西省基础研究计划(自由探索类)资助项目—赤泥协同多源固废注浆材料水化历程及流变行为研究(202203021222429)
山西交控汾石高速自研项目—全固废类采空区注浆充填材料的制备及应用技术研究
山西交控集团科技项目—晋阳改扩建工程科技示范与施工成套技术研究(2022-JKKJ-5)。
关键词
CFB灰
采空区
注浆材料
组成优化
工程应用
CFB ash
goaf
grouting materials
composition optimization
engineering application
