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Ranjith Pathegama Gamage

Ranjith Pathegama Gamage

Head of Geomechanics Engineering
+61 3 990 54982
Room 140, 60, Clayton Campus

Professor Ranjith from the Department of Civil Engineering has been awarded the ARC Future Fellowship (2009) for his research work to combat climate change.

Prof.Ranjith, P.G. joined the Monash university group in 2003. Before joining to Monash, he worked as an Assistant Professor in Geotechnical and Rock Engineering at Nanyang Technological University, Singapore. His PhD was on the "Stress-strain and permeability characteristics of Two-phase (water+gas) flow through fractured rocks".

His areas of research include carbon dioxide (CO2) sequestration in sedementary basins, modeling of multiphase flow through rocks, gas outbursts and groundwater inundation in mines and tunnels, rock fracture mechanism and tunneling in soft and hard ground. He is actively involved in experimental and numerical modeling in fundamental work as well as applied research in rock mechanics.

Professional Appointments:

- 2013 to Present: Professor, Dept. of Civil Engineering, Monash University, Australia.
- 2010 to 2014: ARC Future Fellow, Dept. of Civil Engineering, Monash University, Australia.
- 2010 to 2014: Associate Professor Dept. of Civil Engineering, Monash University, Australia.
- 2006 to Present: Senior Lecturer, Dept. of Civil Engineering, Monash University, Australia.
- 2003 to 2005: Lecturer, Dept. of Civil Engineering, Monash University, Australia.
- 2001 to 2003 : Assistant Professor, School of Civil and Environmental Eng., Nanyang Technological University, Singapore.
- 2000 to 2001: Research Fellow, Dept. of Civil Engineering, University of Wollongong, Australia.
- 1997 to 2000: PhD student, Dept. of Civil Engineering, Wollongong University
- 1996 to 1997: Lecturer, Dept. of Civil Engineering, University of Moratuwa, Sri Lanka.

Awards, honors and scholarships

- 2014: Vice Chancellors’ Award for the best Postgraduate Research Supervision
- 2014: Dean’s Award for the best Postgraduate Research Supervision
- 2013: Australian –China Group Mission Award, 2013(only one received to Monash University)
- 2012: Australian Leadership Awards 2012
- 2011: Vice Chancellors’ Award for Excellence in Research - Early Career Researcher
- 2011: Australia-China Fellowship Award
- 2010: Australian Future Fellowship Award, ARC, Australia
- 2010: Dean’s Award for Excellence in Research- Faculty of Engineering at Monash University
- 2007: Australian Academy of Science Award

Teaching Commitments:

  • CIV2242 - Goemechanics
  • CIV5886 - Infrastructure Geomechanics (MSC)


  • Journals (Total 208 Journal papers)
  • Full publication list can be found in
  • 1. De Silva R, *Ranjith PG*, Perera MSA (2017), An Alternative to Conventional Rock Fragmentation Methods Using SCDA: A Review , Energies, vol.9(11), 958; doi: 10.3390/en9110958 (*Selected as the cover page of the journal)*
  • 2. Xue, Y., *Ranjith, PG*., Gao, F., Zhang, D., Cheng, H., Chong, Z. & Hou, P. (2017) Mechanical behaviour and permeability evolution of gas-containing coal from unloading confining pressure tests In : Journal of Natural Gas & Science Engineering. Vol. 40, 336-346.
  • 3. Song R, Cui MC, Liu JJ, *Ranjith PG* (2017) A Pore-scale Simulation on Thermal-Hydro-Mechanical CouplingMechanism of Rock, Geofluids Volume 2017, Article ID 7510527, 12 pages
  • 4. Huang, Y., Yang, S., *Ranjith*,* PG*. and Zhao, J (2017). Strength failure behavior and crack evolution mechanism of granite containing pre-existing non-coplanar holes: Experimental study and particle flow modelling, Computers and Geotechnics, Vol.88,182-198.
  • 5. Zhou ZQ, *Ranjith PG,* Li SC (2017). Criteria for assessment of internal stability of granular soil, Proceedings of the Institution of Civil Engineers - Geotechnical Engineering, vol.170, 73-83.
  • 6. Chen S, Yang T, *Ranjith PG*,Wei C (2017). Mechanism of the Two-Phase Flow Model for Water and Gas Based on Adsorption and Desorption in Fractured Coal and Rock, Rock Mechanics and Rock Engineering, vol.50(3), 571-586.
  • 7. De Silva GPD, *Ranjith PG*, Perera MSA, Dai ZX, Yang SQ (2017). An experimental evaluation of unique CO2 flow behaviour in loosely held fine particles rich sandstone under deep reservoir conditions and influencing factors, Energy, vol.119, 121-137.
  • 8. Kumari WGP, *Ranjith PG*, Perera MSA, Shao S, Chen BK, Lashin A, Arifi NA, Rathnaweera TD (2017). Mechanical behaviour of Australian Strathbogie granite under in-situ stress and temperature conditions: An application to geothermal energy extraction, Geothermics, vol.65, 44-59.
  • 9. Rathnaweera TD, *Ranjith PG*, Perera MSA, De Silva VRS (2017). Development of a laboratory-scale numerical model to simulate the mechanical behaviour of deep saline reservoir rocks under varying salinity conditions in uniaxial and triaxial test environments, Measurement: Journal of the international Measurement Confederation, vol.101, 126-137.
  • 10. Ukwattage NL, *Ranjith PG*, Li X (2017). Steel-making slag for mineral sequestration of carbon dioxide by accelerated carbonation, Measurement: Journal of the international Measurement Confederation, vol.97, 15-22.
  • 11. Wanniarachchi WAM, *Ranjith PG*, Perera MSA (2017). Shale gas fracturing using foam-based fracturing fluid: a review, Environmental Earth Sciences, vol.76(2).
  • 12. Mahanta B, Tripathy A, Vishal V, Singh TN, *Ranjith PG* (2017). Effects of strain rate on fracture toughness and energy release rate of gas shales, Engineering Geology, vol.218, 39-49.
  • 13. Ranathunga AS, Perera MSA, *Ranjith PG*, Wei CH (2017). An experimental investigation of applicability of CO2 enhanced coal bed methane recovery to low rank coal, Fuel, vol.189, 391-399.
  • 14. Yang SQ, Ranjith PG, Jing HW, Tian WL, Ju Y. (2017 An experimental investigation on thermal damage and failure mechanical behavior of granite after exposure to different high temperature treatments, Geothermics, vol. 65 (1),180-197
  • 15. Hou R, Zhang K, Sun K, *Ranjith PG* (2017). Discussions on Correction of Goodman Jack Test, Geotechnical Testing Journal, vol. 40(2), 199-209.
  • 16. Ranathunga AS, Perera MSA, *Ranjith PG* (2016). Influence of CO2 adsorption on the strength and elastic modulus of low rank Australian coal under confining pressure, International Journal of Coal Geology, vol.167, 148-156.
  • 17. Rathnaweera TD, *Ranjith PG*, Perera MSA (2016). Experimental investigation of geochemical and mineralogical effects of CO2 sequestration on flow characteristics of reservoir rock in deep saline aquifers, Scientific Reports, vol.6(1).
  • 18. Mahanta B, Singh TN, *Ranjith PG* (2016). Influence of thermal treatment on mode I fracture toughness of certain Indian rocks, Engineering Geology, vol.210, 103-114.
  • 19. Khandelwal M, Armaghani DJ, Faradonbeh RS, *Ranjith PG*, Ghoraba S (2016). A new model based on gene expression programming to estimate air flow in a single rock joint, Environmental Earth Sciences, vol.75(9).
  • 20. Rathnaweera TD, Romain L, *Ranjith PG*, Perera MSA (2016). Deformation Mechanics and Acoustic Propagation in Reservoir Rock Under Brine and Oil Saturation: An Experimental Study, Energy Procedia, vol.88, 544-551.
  • 21. Sirdesai NN, Singh TN, *Ranjith PG*, Singh R (2016). Effect of Varied Durations of Thermal Treatment on the Tensile Strength of Red Sandstone, Rock Mechanics and Rock Engineering, vol.50(1), 205-213.
  • Refereed Conferences **(Total 89)

Professional Association:

Fellow Member, American Society of Civil Engineers, USA
Fellow Member, Engineers Australia
Member, American Rock Mechanics Association (Life Member), USA
Member, American Society of Civil Engineers (Geo Institute)
Member, Society of Petroleum Engineering (USA)
Member of the American Geophysical Union , USA
Member of International Society of Rock Mechanics, UK
Member of Tunneling and Underground Construction Society of Singapore (2000-2003).
Working Group member – ITA (International Tunnelling Association)
Environmental Commission in Underground Activities- Represented Singapore (2002 to 2003).

Research Interests:

  • Shale Gas: Stimulation methodologies for enhancement of recoveries
  • Stability of wellbore analysis
  • Characterization of weathered rocks
  • Tunneling in soft and hard ground
  • Slope Stability of large deep, open cut mines
  • Underground longwall mining
  • Enhanced coal bed methane recovery, ECBM
  • Hydro-fracturing and other simulation methods for depleted and tight reservoirs
  • Two-phase and multiphase flow in fractured rock media
  • Coupled Hydro-mechanical behaviour of fractured and porous rocks
  • Gas outbursts and groundwater inundation in mines
  • Research into Geosequestration of Carbon Dioxide (CO2), including geomechanical behaviour due to the stored supercritical CO2, Formation and swelling behaviour of rock media, Migration of CO2 due to change in insitu stresses.
  • Activation of faults due to the injection of high fluid pressures
  • Rock physics under high pressure conditions
  • Contaminant transport through rock
  • Storage of chemical/nuclear waste in underground caverns
  • Deep Geothermal works