Deformation and permeability characteristics of rocks with interconnected fractures

B. Indraratna, P. G. Ranjith, W. Gale

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

3 Citations (Scopus)


One of the key questions in the design of underground structures under water bodies is how hydraulic properties such as permeability change with depth, hence, the way in which effective stresses vary after excavation. In this study, a series of laboratory tests were carried out to investigate flow deformation characteristics for different stress conditions. Intact and jointed granite rock specimens with multiple cracks were tested under two different permeating fluids (air and water), using a high-pressure triaxial equipment. Effects of confining stress and axial stress on flow discharge and joint deformation were observed. Findings of this study reveal that flow volume decreases significantly with the increase of confining stress, irrespective of the permeating fluid. However, increase in confining stress beyond a critical value does not influence the flow rate, if the fractures or pores in the specimen have compressed to their minimum apertures or porosity.

Original languageEnglish
Title of host publication20th Century Lessons, 21st Century Challenges.
EditorsG. Vouille, P. Berest
Number of pages6
Publication statusPublished - 1999
Externally publishedYes
EventInterscience Conference on Antimicrobial Agents and Chemotherapy 1999 -
Duration: 17 Sept 199920 Sept 1999
Conference number: 40th (Proceedings)


ConferenceInterscience Conference on Antimicrobial Agents and Chemotherapy 1999
Abbreviated titleICAAC 1999
Internet address

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