CFD-DEM simulations for injection of cement-based grout - The effect of rock fracture roughness

S. Sakakibara, T. Koyama, H. Shimizu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Grouting is a widely used method to seal and/or reduce permeability of fractured rock masses around underground structures. However, the filtration and penetration mechanism of cement-based grout have not been clarified sufficiently yet due to complicated physical and chemical processes of grouting. Therefore, the grout material and injection parameters such as injection pressure and water/cement ratio (W/C) are usually determined empirically by technical experts at the injection site. In this paper, for better understanding of the penetration and filtration mechanism of cement-based grout through rock fractures, the two-dimensional numerical model of coupled Computational Fluid Dynamics and the Distinct Element Method (CFD-DEM) was developed and the effect of rock fracture roughness on the filtration and penetration mechanism was numerically investigated. The simulation results clearly shows that the effect of surface roughness of rock fracture on the movement of cement particles and the amount of injected cement particles is significant.

Original languageEnglish
Title of host publicationRock Engineering and Rock Mechanics
Subtitle of host publicationStructures in and on Rock Masses - Proceedings of EUROCK 2014, ISRM European Regional Symposium
PublisherTaylor and Francis - Balkema
Pages793-798
Number of pages6
ISBN (Print)9781138001497
Publication statusPublished - 2014 Jan 1
Event2014 ISRM European Regional Symposium on Rock Engineering and Rock Mechanics: Structures in and on Rock Masses, EUROCK 2014 - Vigo, Spain
Duration: 2014 May 262014 May 28

Publication series

NameRock Engineering and Rock Mechanics: Structures in and on Rock Masses - Proceedings of EUROCK 2014, ISRM European Regional Symposium

Other

Other2014 ISRM European Regional Symposium on Rock Engineering and Rock Mechanics: Structures in and on Rock Masses, EUROCK 2014
CountrySpain
CityVigo
Period14/5/2614/5/28

ASJC Scopus subject areas

  • Geochemistry and Petrology

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