Experiment Study of Penetration Grouting for the Pore Fracture Sandstone
WANG Ming-zhi
BAI Feng-zhong
FU Xiang-kun
LI Zhong-sen
CHE Fa-ming
Abstract：The weak cementation ,strong water-rich sandstones are widely developed in the northwest of China.Practical problems such as the difficulty of injecting the ordinary particle into this rock and the poor effect of infiltration reduction of waterproof grouting are existed.Selecting typical sandstones with the construction of air shaft wellbore in Xinzhuang Mine as the project background and the indoor test as the basis ,grouting test was repeated four times with superfine cement and urea-formaldehyde resin and the first two times of which were injected with superfine cement.The results showed that in-jecting superfine cement repeatedly can fill the large pores in rocks well.Aiming at the fine ones super-fine cement which is difficult to inject ,injecting Solution type chemical grout repeatedly can fill it which granular materials can not.With the increase in the number of grouting ,permeability coefficient of rock samples decreases ,w hich indicates that the effect of the slurry filling fissures in the pores is significant.Particle type slurry and solution type slurry can play a very good combination with the effect of seepage.
Keywords：pore fracture sandstonegroutingpermeability coefficient
Publication Date：2014-11-09
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 77-80 )