TY  - EJOU
AU  - Guo, Yanxu 
AU  - Zhao, Peng 
AU  - Zhang, Qingsong 
AU  - Liu, Rentai 
AU  - Zhang, Lianzhen 
AU  - Liu, Yankai 

TI  - Investigation of the Mechanism of Grout Penetration in Intersected Fractures
T2  - Fluid Dynamics \& Materials Processing

PY  - 2019
VL  - 15
IS  - 4
SN  - 1555-2578

AB  -  To  study  the  penetration  mechanism  of  cement-based  slurry  in  intersected  fractures  during  grouting  and  the  related  pressure  distribution,  we  have  used  two  different  variants  of  cement,  namely,  basic  cement  slurry  and  fast-setting  cement  slurry.  The  influence of a retarder, time-varying viscosity, fracture width and location of injection hole is  also  considered.  A  finite  element  software  is  used  to  implement  two  and  three-dimensional   numerical   models   for   grouting   of   intersected   fractures   in   hydrostatic   conditions. Results show that there are significant differences in the diffusion morphology and   pressure   distribution   depending   on   the   considered   cement   slurry.   Retarder   can   effectively slow down the rising rate of injection pressure and extend the diffusion distance of grout. The influence of the branch fracture is more important when basic cement slurry is considered,  indicating  that  the  change  of  grout  pressure  is  correlated  with  the  slurry  viscosity. The faster the viscosity increases, the less evident is the effect.
KW  - Fracture  grouting
KW  -   numerical investigation
KW  -  intersected  fractures
KW  -   mechanism of grout penetration

DO  - 10.32604/fdmp.2019.07844