Study on the optimum proportion and grouting effect of superfine cement slurry
GUO Dongming
TAN Jishuang
XIAO Zhengxing
ZHANG Yanqiu
Abstract：Took broken surrounding rock of belt conveyor roadway with mining level-850 m in Jiulong Coal Mine as the background,based on the changes of the water cement ratio and the superfine cement fineness,the authors produced a batch of standard cement specimens from the perspective of the grouting effect.The liquidity,drainage rate,density,uniaxial compressive strength,and grouting experiment were carried out.It is the mechanical properties and grouting performance of superfine cement grouting under different water cement ratio and different fineness that were studied.Research results showed that,in same conditions of the mixing and curing time,temperature and other factors,while water cement ratio of superfine cement slurry increased,the drainage rate increased,the uniaxial compressive strength was less,the overall fluidity decreased,and density changesd very small.When the water cement ratio was 1.4∶1 and the fineness was 1 250 mesh,the mechanical properties of superfine cement were mostly balanced,grouting effect was better.In the fracturing grouting experiments,it is the specimen with the ratio of the superfine cement injection and pre-broken that can absorb more energies,which showed the specimens had obvious characteristics of the plastic and resistance to deformation ability.
Keywords：superfine cement slurrywater cement ratiocement finenessgrouting effectwater separating proportion
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 1-8,34 )