Reza Hedayat

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Reza Hedayat, PHD, Assistant Professor



Reza Hedayat, PhD
Colorado School of Mines
Department of Civil & Environmental Engineering
1012 14th St., Golden, CO 80401, USA
Tel: (303) 273-3401
Center for Underground Construction & Tunneling
Personal Website


PhD Civil Engineering, Purdue University, 2013
MS Civil Engineering, Amirkabir University of Technology, 2009
BS Civil Engineering, Shiraz University, 2006


Center for Underground Construction and Tunneling  (UC&T)


Dr. Hedayat's research interests focus on the mechanical and geophysical characterization of geomaterials, rock and fracture mechanics, applied geophysics and wave propagation, laboratory earthquakes, hydro-mechanical properties of shales, and ground-support interaction in tunnels. Dr. Hedayat’s research utilizes geophysical methods and wave analysis to observe what is happening inside the materials with the aim of understanding multi-scale physical processes like slip, failure, earthquake, and fracturing. Dr. Hedayat’s research has focused on active geophysical monitoring of shear failure along rock joints using compressional and shear waves and resulted in the identification of geophysical precursors prior to the failure. Dr. Hedayat’s research strives to develop a better understanding of fracturing and flow in geomaterials and aims to bridge the gap between laboratory studies and field applications through performing multiscale experiments and developing theoretical and numerical models. Dr. Hedayat’s future research will involve multiscale experimental study of soils and rocks, non-destructive characterization of ground condition in tunnels, laboratory investigation of hydraulic fracturing, and fluid flow in porous and fractured media.

Dr. Hedayat’s teaching interests are in mechanics of materials, soil mechanics, foundations, earth retaining structures, rock mechanics, tunnels in hard rock, and fracture of geomaterials.


Hedayat, A., Ochoa, F., and Khasawneh, Y. (2015). Numerical simulation of crack initiation and growth in rock specimens containing a flaw under uniaxial compression. Proceedings of the 49th US Rock Mechanics Symposium, San Francisco, June 28-July 1.

Hedayat, A., Pyrak-Nolte, L and Bobet, A. (2014). Precursors to shear failure of rock discontinuities. Geophysical Research Letters, 41, 5467-5475, doi: 10.1002/2014GL060848.

Hedayat, A., Pyrak-Nolte, L and Bobet, A. (2014). Detection and quantification of slip along non-uniform frictional discontinuities using digital image correlation. Geotechnical Testing Journal, 37 (5), doi: 10.1520/GTJ20130141.

Hedayat, A., Pyrak-Nolte, L and Bobet, A. (2014). Multi-modal monitoring of slip along frictional discontinuities. Rock Mechanics and Rock Engineering, 47(5), 1575-1587, doi: 10.1007/s00603-014-0588-7.

Hedayat, A., Pyrak-Nolte, L and Bobet, A. (2014). Geophysical investigation of shear failure along cohesive-frictional rock discontinuities. Proceedings of the 48th US Rock Mechanics Symposium, Minnesota, June 1-4.

Hedayat, A., Bobet, A and Pyrak-Nolte, L. (2012). Monitoring slip initiation and propagation along frictional interfaces with seismic wave transmission. Proceedings of the 46th US Rock Mechanics Symposium, Chicago, June 24-27.

Fahimifar, A., Monshizadeh, F., Hedayat, A., and Vakilzadeh, A. (2010). Analytical solution for the excavation of circular tunnels in a visco-elastic Burger’s material under hydrostatic stress field. Tunnelling and Underground Space Technology, 25(4), 297-304, doi: 10.1016/j.tust.2010.01.002.

Fahimifar, A. and Hedayat, A. (2010). Elasto-plastic analysis in conventional tunnelling excavation. Proceedings of the ICE- Geotechnical Engineering, 163(1), 37-45, doi: 10.1680/geng.2010.163.1.37.


  • Future Leaders Program Membership, American Rock Mechanics Association, 2015
  • Rocha Medal Runner-up Certificate Award, International Society of Rock Mechanics, 2015
  • N.G.W. Cook Ph.D. Dissertation Award, American Rock Mechanics Association, 2014

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