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Mining Engineering

Cezar Trifu

Cezar Trifu

Adjunct Assistant Professor

trifu@esg.ca

Cezar Trifu

Biography

Dr. Trifu is Senior Seismologist and Director of Mining & Geotechnical Services with Engineering Seismology Group. He holds degrees in Physics, and possesses a wide expertise in theoretical and observational seismology. Through his work, he explored the scaling effects of the rupture process from large tectonic earthquakes to induced microseismicity, with modeling and analyses directed to the understanding of seismic source and its relationship with local and regional stresses. His current research activities are focused on rockbursts and mining induced seismicity, and the use of passive seismic monitoring techniques to various geotechnical applications.

The results of Dr. Trifu's studies have been published in over 60 peer-reviewed papers. He also edited 5 special volumes at Pure and Applied Geophysics and Tectonophysics on topics such as seismic source scaling, seismic hazard and risk assessment, and induced seismicity. Besides his research and administrative activities, Dr. Trifu is Associate Editor with the Bulletin of the Seismological Society of America, and on the editorial board of Tectonophysics. He was presented by the American Geophysical Union with the Editors' Citation for Excellence in Refereeing.

Courses:

  • Passive seismic monitoring
  • Induced and natural seismicity
  • Seismic source

Publications

Journal Publications

Trifu, C-I., V. Shumila, and D. Chen , "Investigation of rock mass stability through the analysis of failure components of microseismicity at Darlot Gold Mine, Australia," Deep and High Stress Mining Section 47, 9 p, Australian Centre for Geomechanics, Perth, Australia., 2002.

Trifu, C-I., V. Shumila, and N. Burgio, "Characterization of the caving front at Ridgeway mine, New South-Wales, based on geomechanical data and detailed microseismic analysis," Deep and High Stress MiningSection 41, 14 p, Australian Centre for Geomechanics, Perth, Australia., 2002.

Trifu, C-I. and V. Shumila , "The use of uniaxial recordings in moment tensor inversions for induced seismic sources," Tectonophysics 356, 171-180, 2002.

Trifu, C-I. and V. Shumila , "Reliability of seismic moment tensor inversions for induced microseismicity at Kidd mine," Pure and Applied Geophysics 159, 145-164, 2002.

Trifu, C-I. and V. Shumila, "Reliability of seismic moment tensor inversions for induced microseismicity at Kidd Mine, Ontario," Pure and Applied Geophysics 159, 145-164, 2001.

Trifu, C-I. , "The evaluation of failure components using the seismic moment tensor inversion, in Rock Mechanics in the National Interest ," DC Rocks 1335-1341, D. Elsworth, J.P. Tinucci, and K.A. Heasley (eds.), A.A. Balkema, Rotterdam, Netherlands., 2001.

Urbancic, T.I. and C-I. Trifu, "Recent advances in seismic monitoring technology at Canadian mines,"Journal of Applied Geophysics 45, 225-237, 2000.

Trifu, C-I., D. Angus, and V. Shumila, "A fast evaluation of the seismic moment tensor for induced seismicity," Bulletin of the Seismological Society of America 90, 1521-1527, 2000.

Trifu, C-I. , "Assessing the rockmass condition by the analysis of failure mechanisms," Dynamic Rock Mass Response to Mining 75-80, G. van Aswegen, R.J. Durrheim, and W.D. Ortlepp (eds.), South African Institute of Mining and Metallurgy, Johannesburg, South Africa., 2000.

Urbancic, T.I., C-I. Trifu, R.A. Mercer, A.J. Feustel and J.A.G. Alexander, "Automatic time-domain calculation of source parameters for the analysis of induced seismicity," Bulletin of the Seismological Society of America 86, 1627-1633, 1996.

Trifu, C-I. and T.I. Urbancic, "Fracture coalescence as a mechanism for earthquakes: observations based on mining induced seismicity," Tectonophysics 261, 193-207, 1996.

Trifu, C-I., T.I. Urbancic and R.P. Young, "Source parameters of mining-induced seismic events: an evaluation of homogeneous and inhomogeneous faulting models for assessing damage potential, Pure and Applied Geophysics," Pure and Applied Geophysics 145, 3-27, 1995.

Urbancic, T.I., C-I. Trifu and R.P. Young, "Microseismicity derived fault-planes and their relationship to focal mechanism, stress inversion, and geologic data," Geophysical Research Letters 20, 2475-2478, 1993.

Trifu, C-I., T.I. Urbancic and R.P. Young, "Non-similar frequency-magnitude distribution for M < 1 seismicity," Geophysical Research Letters 20, 427-430, 1993.

Bernard, P., C-I. Trifu, Zollo A. and A. Herrero , "The details of the rupture kinematics and mechanism of the Irpinia 1980 earthquake: New results and remaining questions," Annali di Geofisica 36, 71-80, 1993.

Urbancic, T.I., C-I. Trifu, J.M. Long and R.P. Young , "Space-time correlations of b-values with stress release," Pure and Applied Geophysics 139, 449-462, 1992.

Radulian, M. and C-I. Trifu , "Would it have been possible to predict the August 30, 1986 Vrancea earthquake," Bulletin of the Seismological Society of America 81, 2498-2503, 1991.

Trifu, C-I. and M. Radulian, "Frequency_magnitude distribution of earthquakes in Vrancea: Relevance for a discrete model," Journal of Geophysical Research 96, 4301-4311, 1991.

Trifu, C-I., "Detailed configuration of intermediate seismicity in Vrancea region, Revista di Geofisica,"Revista di Geofisica 46, 33-40, 1990.

Trifu, C-I. and M. Radulian , "Asperity distribution and percolation as fundamentals of earthquake cycle,"Physics of the Earth and Planetary Interiors 58, 277-288, 1989.

Trifu, C-I. , "Depth distribution of local stress inhomogeneities in the Vrancea region, Romania," Journal of Geophysical Research 92, 13878-13886, 1987.

Trifu, C-I. and M.C. Oncescu, "Fault geometry of August 30, 1986 Vrancea earthquake," Annales Geophysicae 5B, 727-730, 1987.

Trifu, C-I. and M. Radulian , "Predicted near-field ground motion for dynamic stress drop models," Pure and Applied Geophysics 123, 173-198, 1985.

Trifu, C-I., "The mechanism of March 4, 1977 Vrancea earthquake inferred from Rayleigh waves analysis,"Bolletino di Geofisica Teorica e Applicata 88, 311-320, 1980.

Topic Volumes

Seismic Source Mechanism through Moment Tensors, 2002. (In Progress)

The Mechanism of Induced Seismicity, 2002. (In Progress)

Seismic Hazard of the Circum-Pannonian Region, 2000. (In Progress)

New Trends in Seismological Research: Studies of Seismicity Induced by Mining, 1998. (In Progress)

Seismic Source Parameters: From Micro-Earthquakes to Large Events, 1996. (In Progress)

Recent Publications:

Trifu, C-I. and V. Shumila (2002). Reliability of seismic moment tensor inversions for induced microseismicity at Kidd mine, Ontario, Pure and Applied Geophysics, 159, 145-164.

Trifu, C-I. and V. Shumila (2002). The use of uniaxial recordings in moment tensor inversions for induced seismic sources, Tectonophysics, 356, 171-180.

Trifu, C-I., V. Shumila, and N. Burgio (2002). Characterization of the caving front at Ridgeway mine, New South-Wales, based on geomechanical data and detailed microseismic analysis, in Deep and High Stress Mining, Section 41, 14 p, Australian Centre for Geomechanics, Perth, Australia.

Trifu, C-I., V. Shumila, and D. Chen (2002). Investigation of rock mass stability through the analysis of failure components of microseismicity at Darlot Gold Mine, Australia, in Deep and High Stress Mining, Section 47, 9 p, Australian Centre for Geomechanics, Perth, Australia.

Trifu, C-I. (2001). The evaluation of failure components using the seismic moment tensor inversion, inRock Mechanics in the National Interest - DC Rocks 2001, D. Elsworth, J.P. Tinucci, and K.A. Heasley (eds.), pp.1335-1341, A.A. Balkema, Rotterdam, Netherlands.

Trifu, C-I. and V. Shumila (2001). Reliability of seismic moment tensor inversions for induced microseismicity at Kidd Mine, Ontario, Pure and Applied Geophysics, 159, 145-164.

Trifu, C-I. (2000). Assessing the rockmass condition by the analysis of failure mechanisms, in Dynamic Rock Mass Response to Mining, G. van Aswegen, R.J. Durrheim, and W.D. Ortlepp (eds.), pp.75-80, South African Institute of Mining and Metallurgy, Johannesburg, South Africa.

Trifu, C-I., D. Angus, and V. Shumila (2000). A fast evaluation of the seismic moment tensor for induced seismicity, Bulletin of the Seismological Society of America, 90, 1521-1527.

Urbancic, T.I. and C-I. Trifu (2000). Recent advances in seismic monitoring technology at Canadian mines,Journal of Applied Geophysics, 45, 225-237.

Other selected publications

Trifu, C-I. and T.I. Urbancic (1996). Fracture coalescence as a mechanism for earthquakes: observations based on mining induced seismicity, Tectonophysics, 261, 193-207.

Urbancic, T.I., C-I. Trifu, R.A. Mercer, A.J. Feustel and J.A.G. Alexander (1996). Automatic time-domain calculation of source parameters for the analysis of induced seismicity, Bulletin of the Seismological Society of America, 86, 1627-1633.

Trifu, C-I., T.I. Urbancic and R.P. Young (1995). Source parameters of mining-induced seismic events: an evaluation of homogeneous and inhomogeneous faulting models for assessing damage potential, Pure and Applied Geophysics, 145,3-27.

Bernard, P., C-I. Trifu, Zollo A. and A. Herrero (1993). The details of the rupture kinematics and mechanism of the Irpinia 1980 earthquake: New results and remaining questions, Annali di Geofisica, 36, 71-80.

Trifu, C-I., T.I. Urbancic and R.P. Young (1993). Non-similar frequency-magnitude distribution for M < 1 seismicity, Geophysical Research Letters, 20, 427-430.

Urbancic, T.I., C-I. Trifu and R.P. Young (1993). Microseismicity derived fault-planes and their relationship to focal mechanism, stress inversion, and geologic data, Geophysical Research Letters, 20, 2475-2478.

Urbancic, T.I., C-I. Trifu, J.M. Long and R.P. Young (1992). Space-time correlations of b-values with stress release, Pure and Applied Geophysics, 139, 449-462.

Trifu, C-I. and M. Radulian (1991). Frequency_magnitude distribution of earthquakes in Vrancea: Relevance for a discrete model, Journal of Geophysical Research, 96, 4301-4311.

Radulian, M. and C-I. Trifu (1991). Would it have been possible to predict the August 30, 1986 Vrancea earthquake?, Bulletin of the Seismological Society of America, 81, 2498-2503.

Trifu, C-I. (1990). Detailed configuration of intermediate seismicity in Vrancea region, Revista di Geofisica, 46, 33-40.

Trifu, C-I. and M. Radulian (1989). Asperity distribution and percolation as fundamentals of earthquake cycle, Physics of the Earth and Planetary Interiors, 58, 277-288.

Trifu, C-I. and M.C. Oncescu (1987). Fault geometry of August 30, 1986 Vrancea earthquake, Annales Geophysicae, 5B, 727-730.

Trifu, C-I. (1987). Depth distribution of local stress inhomogeneities in the Vrancea region, Romania,Journal of Geophysical Research, 92, 13878-13886.

Trifu, C-I. and M. Radulian (1985). Predicted near-field ground motion for dynamic stress drop models,Pure and Applied Geophysics, 123, 173-198.

Trifu, C-I. (1980). The mechanism of March 4, 1977 Vrancea earthquake inferred from Rayleigh waves analysis, Bolletino di Geofisica Teorica e Applicata, 88, 311-320.

Topic Volumes

Trifu, C-I. (Ed.) The Mechanism of Induced SeismicityPure and Applied Geophysics, 159, 2002.

Trifu, C-I. (Ed.) Seismic Source Mechanism through Moment TensorsTectonophysics, 356, 2002.

Panza, G.F., M. Radulian, and C-I. Trifu (Eds.) Seismic Hazard of the Circum-Pannonian RegionPure and Applied Geophysics, 157, 2000.

Trifu, C-I. and M. Fehler (Eds.) New Trends in Seismological Research: Studies of Seismicity Induced by Mining, Petroleum and Geotechnical ActivitiesTectonophysics, 289, 1998.

Trifu, C-I. (Ed.) Seismic Source Parameters: From Microearthquakes to Large EventsTectonophysics, 261, 1996.