Refereed Journal Articles

  • Arora, K., Gutierrez, M., Hedayat, A., and Xia, C. (2020). Tunnels in Squeezing Clay-Rich Rocks. https://doi.org/10.1016/j.undsp.2020.07.001

  • Koopialipoor, M., Murlidhar, B.R., Hedayat, A., Armaghani, D.J., Gordan, B., and Mohamad, E.T. (2020). The use of new intelligent techniques in designing retaining walls. Engineering with Computers, 36, 283-294. https://doi.org/10.1007/s00366-018-00700-1.

  • Shirole, D., Walton, G., and Hedayat, A. (2020). Experimental investigation of multi-scale strain-field heterogeneity in rocks. International Journal of Rock Mechanics and Mining Sciences 127, 104212. https://doi.org/10.1016/j.ijrmms.2020.104212.

  • Mahdiyar, A., Armaghani, D.J., Koopialipoor, M., Hedayat, A., Abdullah, A., Yahya, K. (2020). Practical risk assessment of ground vibrations resulting from blasting, using gene expression programming and Monte Carlo simulation techniques. Applied Sciences, 10 (2), 472. https://doi.org/10.3390/app10020472.

  • Shirole, D., Hedayat, A., and Walton, G. Illumination of damage in intact rock specimens by ultrasonic wave transmission and reflection. Journal of Geophysical Research-Solid Earth, 125(7), e2020JB019526. https://doi.org/10.1029/2020JB019526

  • Gheibi, A., and Hedayat, A. (2020). Ultrasonic imaging microscale processes in quartz gouge during compression and shear. Journal of Rock Mechanics and Geotechnical Engineering. (Accepted and in press).

  • Shirole, D.., Hedayat, A., Ghazanfari, E., and Walton, G. (2020). Evaluation of an ultrasonic method for damage characterization of brittle rocks. Rock Mechanics and Rock Engineering. https://doi.org/10.1007/s00603-020-02045-y

  • Walton, G., Hedayat, A., and Rahjoo, M. (2019). Relating plastic potential function to experimentally obtained dilatancy observations for geomaterials with a confinement-dependent dilation angle. International Journal of Geomechanics 19 (8), 04019092.

  • Hedayat, A., and Weems, J. (2019). The elasto-plastic response of deep tunnels with damaged zone and gravity effects. Rock Mechanics and Rock Engineering 52 (12), 5123-5135. https://doi.org/10.1007/s00603-019-01834-4.

  • Hedayat, A., Oreste, P., and Spagnoli, G. (2019). Analysis of the effects of blast-induced damage zone with attenuating disturbance factor on the ground support interaction. Geomechanics and Geoengineering, 1-11. Doi: 10.1080/17486025.2019.1664777

  • Koopialipoor, M., Tootoonchi, H., Armaghani, D.J., Mohamad, E.T., and Hedayat, A. (2019). Application of deep neural networks in predicting the penetration rate of tunnel boring machines. Bulletin of Engineering Geology and the Environment 78 (8), 6347-6360. https://doi.org/10.1007/s10064-019-01538-7

  • Oreste, P., Spagnoli, G., Ramos, C.A.L., and Hedayat, A. (2019). Assessment of the safety factor evolution of the shotcrete lining for different curing ages. Geotechnical and Geological Engineering, 37 (6), 5555-5563. https://doi.org/10.1007/s10706-019-00990-2

  • Mohamad, E.T., Koopialipoor, M., Murlidhar, B.R., Rashiddel, A., Hedayat, A., Armaghani, D.J. (2019). A new hybrid method for predicting ripping production in different weathering zones through in situ tests. Measurement 147, 106826. https://doi.org/10.1016/j.measurement.2019.07.054

  • Asadizadeh, A., Masoumi, H., Roshan, H., and Hedayat, A. (2019). Coupling Taguchi and Response Surface Methodologies for the Efficient Characterization of Jointed Rocks’ Mechanical Properties. Rock Mechanics and Rock Engineering, 52 (11), 4807-4819. https://doi.org/10.1007/s00603-019-01853-1

  • Oreste, P., Hedayat, A., and Spagnoli, G. (2019). Effect of gravity of the plastic zones on the behavior of supports in very deep tunnels excavated in rock masses. International Journal of Geomechanics 19 (9), 04019107 https://doi.org/10.1061/(ASCE)GM.1943-5622.0001490

  • Shirole, D., Hedayat, A., and Walton, G. (2019). Experimental relationship between ultrasonic attenuation and surface strains in prismatic rock specimens, Journal of Geophysical Research - Solid Earth, 124 (6), 5770-793. https://doi.org/10.1029/2018JB017086

  • Kravitz, B., Mooney, M., Karlovsek, J., Danielson, I., and Hedayat, A. (2019). Void detection in two-component annulus grout behind a pre-cast segmental tunnel liner using Ground Penetrating Radar, Tunnelling and Underground Space Technology, 83, 381-392. https://doi.org/10.1016/j.tust.2018.09.032

  • Kamali-Asl, A., KC, B., Ghazanfari, E., and Hedayat, A. (2019). Flow-induced alterations of ultrasonic signatures and fracture aperture under constant state-of-stress in a single-fractured rock, Geophysics, 84(4), A37-WA139, https://doi.org/10.1190/geo2018-0574.1.

  • Koopialipoor, M., Ramesh Murlidhar, B., Hedayat, A., Jahed Armaghani, D., Gordan, B., and Tonnizam Mohamad, E. (2019). The use of new intelligent techniques in designing retaining walls, Engineering with Computers, https://doi.org/10.1007/s00366-018-00700-1

  • Shirole, D., Walton, G., Ostrovsky, Lev., Masoumi, H., and Hedayat, A. (2018). Non-linear ultrasonic monitoring of damage progression in disparate rocks. International Journal of Rock Mechanics and Mining Sciences, 111, 33-44. https://doi.org/10.1016/j.ijrmms.2018.08.010.

  • Gheibi, A., and Hedayat, A. (2018). Ultrasonic investigation of granular materials subjected to compression and crushing. Ultrasonics, 87, 112-125. https://doi.org/10.1016/j.ultras.2018.02.006

  • Kamali-Asl, A., Ghazanfari, E., Hedayat, A., and Deering, L. (2018). Investigation of static/dynamic moduli and plastic response of shale specimens. International Journal of Rock Mechanics and Mining Sciences 110, 231-245. https://doi.org/10.1016/j.ijrmms.2018.08.008

  • Sarfarazi, V., Haeri, H., Ebneabbasi, P., Shemirani, A.B., Hedayat, A. (2018). Determination of Tensile Strength of Concrete Using a Novel Apparatus. Construction and Building Materials. 166, 817-832. https://doi.org/10.1016/j.conbuildmat.2018.01.157

  • Koopialipoor, M., Armaghani, D.J., Hedayat, A., Marto, A., Gordon, B. (2018). Applying various hybrid intelligent systems to evaluate and predict slope stability under static and dynamic conditions. Soft Computing, https://doi.org/10.1007/s00500-018-3253-3

  • Masoumi, H., Roshan, H., Hedayat, A., Hagan, PC. (2018). Scale/Size dependency of intact rock under point load and indirect tensile (Brazilian) testing. International Journal of Geomechanics. DOI: 10.1061/(ASCE)GM.1943-5622.0001103

  • Hedayat, A., Haeri, H., Hinton, J., Masoumi, H., and Spagnoli, G. (2018). Geophysical signatures of shear induced damage and frictional processes on rock joint. Journal of Geophysical Research. 123(2), 1143-1160. DOI: 10.1002/2017JB014773

  • Haeri, H., Sarfarazi, V., Shemirani, A.B., Hedayat, A. (2017). Experimental and numerical investigation of the center-cracked horseshoe disk method for determining the mode I fracture toughness of rock-like material. Rock Mechanics and Rock Engineering. DOI: 10.1007/s00603-017-1310-3

  • Hedayat, A., and Walton, G. (2017). Laboratory determination of rock fracture shear stiffness using seismic wave propagation and digital image correlation. Geotechnical Testing Journal, 40(10), 92-106. DOI: 10.1520/GTJ20160035

  • Walton, G., Hedayat, A., Kim, E., and Labrie, D. (2017). Post-yield strength and dilatancy evolution across the brittle-ductile transition in Indiana limestone. Rock Mechanics and Rock Engineering. DOI: 10.1007/s00603-017-1195-1

  • 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

  • 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.

contact information

Reza Hedayat, Ph.D.
Assistant Professor
Department of Civil & Environmental Engineering

Coolbaugh Hall Room 248

1012 14th Street

Golden, CO 80401, USA

Email: hedayat@mines.edu

Phone: (303) 273-3401