Personal profile
Personal profile
Prof. YAGIZ holds a PhD from Colorado School of Mines, USA. Authored over 100 publications in peer-reviewed scientific journals, proceedings, books, and industrial reports. Recognized reviewer of numerious prestigious journals and an Editor of Tunnelling & Underground Space Tech., (TUST, 2019-2021) and also an editorial board member of TUST (2021-2025). First paper he published (in TUST, 2008) is awarded by Int Association of Engineering Geologists as the best paper of the year. One of the authors of first manuscript published (in Enginering Geology, 2017) with the affiliation of School of Mining and Geosciences of Nazarbayev University (NU). Also, he is the author of the Book "Advancements in Underground Infrastructures, 2025" published first and only book with the affiliation of SMG.
Prof. YAGIZ is a chair of teaching & learning committee and coordinator of Mining Engineering program of the School of Mining and Geosciences (SMG) (2018-2021). Representative member of teaching & learning and academic quality committees of the SMG at NU (2018-2022). Awarded with Nazarbayev University, Senate Service Award (2020), due to outstanding contribution to the SMG and NU.
Prof. YAGIZ is in the list of the top 2% world most widely cited scientists for the sixth consecutive year (2020-2025). Recognized by Scopus Elsevier Research Excellence Award (2022). He awarded with the Medal of the National Sciences and Higher Education Councel of Kazakhstan (2025). A professional member of the Int Society for Rock Mechanics & Rock Engineering (ISRM).
Teaching
MINE302-Geomechanics
MINE310-Rock Breakage
MINE502-Geology for Civil & Mining Engineers
SMG520-Research Methods & Ethics
MINE507-Rock Excavation Methods
MINE605-Mechanised Excavation & Tunnelling
GEOL604-Engineering Geology & Geotechnics
MINE801-Adv. Mechanized Excavation & Tunnelling
Research interests
Geotechnical Engineering; Geomechanics; Rock Mechanics; Mechanized Excavation & Tunnelling; Geotechnical Site Investigation & Testing; Rock Mass Characterization; Infrastructures
Publications
Selected Journal Manuscripts [2008- Current]
YAGIZ S. Utilizing rock mass properties for predicting TBM performance in hard rock condition (2008) Tunnelling and Underground Space Technology, 23 (3), pp. 326 – 339. DOI: 10.1016/j.tust.2007.04.011. Article
YAGIZ S., Akyol E., Sen G. Relationship between the standard penetration test and the pressuremeter test on sandy silty clays: A case study from Denizli (2008) Bulletin of Engineering Geology and the Environment, 67 (3), pp. 405 – 410. DOI: 10.1007/s10064-008-0153-2. Article
YAGIZ S. Predicting uniaxial compressive strength, modulus of elasticity and index properties of rocks using the Schmidt hammer (2009) Bulletin of Engineering Geology and the Environment, 68 (1), pp. 55 - 63. DOI: 10.1007/s10064-008-0172-z. Article
YAGIZ S. Assessment of brittleness using rock strength and density with punch penetration test (2009) Tunnelling and Underground Space Technology, 24 (1), pp. 66 - 74. DOI: 10.1016/j.tust.2008.04.002. Article
YAGIZ S., Gokceoglu C., Sezer E., Iplikci S. Application of two non-linear prediction tools to the estimation of tunnel boring machine performance (2009) Engineering Applications of Artificial Intelligence, 22 (4-5), pp. 808 - 814. DOI: 10.1016/j.engappai.2009.03.007. Article
YAGIZ S., Gokceoglu C. Application of fuzzy inference system and nonlinear regression models for predicting rock brittleness (2010) Expert Systems with Applications, 37 (3), pp. 2265 - 2272. DOI: 10.1016/j.eswa.2009.07.046. Article
YAGIZ S. Correlation between slake durability and rock properties for some carbonate rocks (2011) Bulletin of Engineering Geology and the Environment, 70 (3), pp. 377 – 383. DOI: 10.1007/s10064-010-0317-8. Article
YAGIZ S., Karahan H. Prediction of hard rock TBM penetration rate using particle swarm optimization (2011) International Journal of Rock Mechanics and Mining Sciences, 48 (3), pp. 427 – 433. DOI: 10.1016/j.ijrmms.2011.02.013. Article
YAGIZ S., Sezer E.A., Gokceoglu C. Artificial neural networks and nonlinear regression techniques to assess the influence of slake durability cycles on the prediction of uniaxial compressive strength and modulus of elasticity for carbonate rocks (2012) International Journal for Numerical and Analytical Methods in Geomechanics, 36 (14), pp. 1636 – 1650. DOI: 10.1002/nag.1066. Article
YAGIZ S. Comment on "Point load test on meta-sedimentary rocks and correlation to UCS and BTS" by Diyuan Li and Lous Ngai Yuen Wong, rock mechanics and rock engineering, DOI: 10.1007/s00603-012-0299-x (2013) Rock Mechanics and Rock Engineering, 46 (4), pp. 909 - 912. DOI: 10.1007/s00603-013-0417-4. Note
Mahdevari S., Shahriar K., YAGIZ S., Akbarpour Shirazi M. A support vector regression model for predicting tunnel boring machine penetration rates (2014) International Journal of Rock Mechanics and Mining Sciences, 72, pp. 214 - 229. DOI: 10.1016/j.ijrmms.2014.09.012. Article
Ghasemi E., YAGIZ S., Ataei M. Predicting penetration rate of hard rock tunnel boring machine using fuzzy logic (2014) Bulletin of Engineering Geology and the Environment, 73 (1), pp. 23 - 35. DOI: 10.1007/s10064-013-0497-0. Article
YAGIZ S., Karahan H. Application of various optimization techniques and comparison of their performances for predicting TBM penetration rate in rock mass (2015) International Journal of Rock Mechanics and Mining Sciences, 80, pp. 308 – 315. DOI: 10.1016/j.ijrmms.2015.09.019. Article
Frough O., Torabi S.R., YAGIZ S. Application of RMR for estimating rock-mass–related TBM utilization and performance parameters: A case study (2015) Rock Mechanics and Rock Engineering, 48 (3), pp. 1305 – 1312. DOI: 10.1007/s00603-014-0619-4. Article
Armaghani D.J., Tonnizam Mohamad E., Hajihassani M., YAGIZ S., Motaghedi H. Application of several non-linear prediction tools for estimating uniaxial compressive strength of granitic rocks and comparison of their performances (2016) Engineering with Computers, 32 (2), pp. 189 - 206. DOI: 10.1007/s00366-015-0410-5. Article
Adoko A.C., Gokceoglu C., YAGIZ S. Bayesian prediction of TBM penetration rate in rock mass (2017) Engineering Geology, 226, pp. 245 - 256. DOI: 10.1016/j.enggeo.2017.06.014 Article
YAGIZ S. The effect of pH of the testing liquid on the degradability of carbonate rocks (2018) Geotechnical and Geological Engineering, 36 (4), pp. 2351 - 2363. DOI: 10.1007/s10706-018-0467-1. Article
Ghasemi E., Kalhori H., Bagherpour R., YAGIZ S. Model tree approach for predicting uniaxial compressive strength and Young’s modulus of carbonate rocks (2018) Bulletin of Engineering Geology and the Environment, 77 (1), pp. 331 – 343. DOI: 10.1007/s10064-016-0931-1. Article
Armaghani D.J., Koopialipoor M., Marto A., YAGIZ S. Application of several optimization techniques for estimating TBM advance rate in granitic rocks (2019) Journal of Rock Mechanics and Geotechnical Engineering, 11 (4), pp. 779 - 789. DOI: 10.1016/j.jrmge.2019.01.002. Article
Koopialipoor M., Noorbakhsh A., Noroozi Ghaleini E., Armaghani D.J., YAGIZ S. A new approach for estimation of rock brittleness based on non-destructive tests (2019) Nondestructive Testing and Evaluation, 34 (4), pp. 354 – 375. DOI: 10.1080/10589759.2019.1623214. Article
Buyuksagis I.S., Rostami J., YAGIZ S. Development of models for estimating specific energy and specific wear rate of circular diamond saw blades based on properties of carbonate rocks (2020) International Journal of Rock Mechanics and Mining Sciences, 135, art. no. 104497. DOI: 10.1016/j.ijrmms.2020.104497. Article
YAGIZ S., Yazitova A., Karahan H. Application of differential evolution algorithm and comparing its performance with literature to predict rock brittleness for excavatability (2020) International Journal of Mining, Reclamation and Environment, 34 (9), pp. 672 – 685. DOI: 10.1080/17480930.2019.1709012. Article
Ghadernejad S., Nejati H.R., YAGIZ S. A new rock brittleness index on the basis of punch penetration test data (2020) Geomechanics and Engineering, 21 (4), pp. 391 – 399. DOI: 10.12989/gae.2020.21.4.391. Article
Parsajoo M., Mohammed A.S., YAGIZ S., Armaghani D.J., Khandelwal M. An evolutionary adaptive neuro-fuzzy inference system for estimating field penetration index of tunnel boring machine in rock mass (2021) Journal of Rock Mechanics and Geotechnical Engineering, 13 (6), pp. 1290 – 1299. DOI: 10.1016/j.jrmge.2021.05.010. Article
Goodarzi S., Hassanpour J., YAGIZ S., Rostami J. Predicting TBM performance in soft sedimentary rocks, case study of Zagros mountains water tunnel projects (2021) Tunnelling and Underground Space Technology, 109, art. no. 103705. DOI: 10.1016/j.tust.2020.103705. Article
Yang J., Liu Y., YAGIZ S., Laouafa F. An intelligent procedure for updating deformation prediction of braced excavation in clay using gated recurrent unit neural networks (2021) Journal of Rock Mechanics and Geotechnical Engineering, 13 (6), pp. 1485-1499. DOI: 10.1016/j.jrmge.2021.07.011. Article
Li C., Zhou J., Armaghani D.J., Cao W., YAGIZ S. Stochastic assessment of hard rock pillar stability based on the geological strength index system (2021) Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 7 (2), art. no. 47. DOI: 10.1007/s40948-021-00243-8. Article
Zhou J., Qiu Y., Zhu S., Armaghani D.J., Li C., Nguyen H., YAGIZ S. Optimization of support vector machine through the use of metaheuristic algorithms in forecasting TBM advance rate (2021) Engineering Applications of Artificial Intelligence, 97, art. no. 104015. DOI: 10.1016/j.engappai.2020.104015. Article
Yang J., YAGIZ S., Liu Y.-J., Laouafa F. Comprehensive evaluation of machine learning algorithms applied to TBM performance prediction (2022) Underground Space (China), 7 (1), pp. 37 – 49. DOI: 10.1016/j.undsp.2021.04.003. Article
Jafarshirzad P., Ghasemi E., YAGIZ S., Kadkhodaei M.H. Evaluation of hard rock tunnel boring machine (TBM) performance using stochastic modeling (2023) Geotechnical and Geological Engineering, 41 (6), pp. 3513 - 3529. DOI: 10.1007/s10706-023-02471-z. Article
Yazitova A., YAGIZ S. Performance analysis of drilling machines based on rock properties and machine’s specifications (2024) Bulletin of Engineering Geology and the Environment, 83 (1), art. no. 37. DOI: 10.1007/s10064-023-03499-4. Article
Ghorbani E., YAGIZ S. Estimating the penetration rate of tunnel boring machines via gradient boosting algorithms (2024) Engineering Applications of Artificial Intelligence, 136, art. no. 108985. DOI: 10.1016/j.engappai.2024.108985. Article
Ghorbani E., YAGIZ S. Predicting disc cutter wear using two optimized machine learning techniques (2024) Archives of Civil and Mechanical Engineering, 24, art. no. 106, Cited 9 times. DOI: 10.1007/s43452-024-00911-y. Article
Jamshidi A., YAGIZ S. Limestone deterioration under freeze–thaw and acid attack: a critical geotechnical problem for the stability of a structure foundation (A case from Lorestan Province, Iran) (2025) Rock Mechanics and Rock Engineering, 58 (6), pp. 7129 – 7148. DOI: 10.1007/s00603-025-04429-4. Article
Gad A., Arman H., YAGIZ S., Abdelghany O., Bahaa Mahmoud B., Ahmed A., Paramban S., Mahmoud Abu Saima. Strength characterization of limestone lithofacies under different moisture states (2025) Scientific Reports, 15(1), art. no. 36822. DOI:10.1038/s41598-025-22699-4. Article
Yazitova A., Adoko A.C., Hassanpour J., YAGIZ S. Empirical models for estimating penetration rate of tunnel boring machines in rock mass (2025) Bulletin of Engineering Geology and the Environment, 84 (1), art. no. 55. DOI: 10.1007/s10064-024-04062-5. Article
Zhou P., Wang J., Song Z., Tian X., Zhang Y., Xiao W., YAGIZ S. Theoretical prediction method for settlement of existing tunnel induced by undercrossing (2026) Transportation Geotechnics, 62:102111. DOI:10.1016/j.trgeo.2026.102111. Article
Olaiya D.T., YAGIZ S., Adoko A.C. TBM penetration rate estimation using Rock Mass Rating (RMR) and machine specifications (2026) Rock Mechanics Bulletin, 5(3):100328. DOI: 10.1016/j.rockmb.2026.100328 . Article
Ghorbani E., YAGIZ S. Comprehensive models for estimating drag force of conical picks using relieved small-scale LCM tests data (2026) Rock Mechanics and Rock Engineering, X (x), pp. xx-xx. DOI: 10.1007/s00603-025-04967-x. Article
Hosseini S., YAGIZ S. Explainable ensemble machine learning for predicting the drilling rate of diamond core drillers using SHAP and integrated graphic user interface (2026) Rock Mechanics and Rock Engineering, X(x), pp. xx-xx. DOI:10.1007/s00603-026-055573-1. Article
Education/Academic qualification
Mining & Geotechnical Eng., PhD, Colorado School of Mines
1997 → 2002
Geotechnical Enginering, MSc, Missouri University of Science and Technology
1995 → 1997
Geological Engineering, BSc, Ankara University
1988 → 1992
Expertise related to UN Sustainable Development Goals
In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This person’s work contributes towards the following SDG(s):
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SDG 4 Quality Education
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SDG 9 Industry, Innovation, and Infrastructure
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SDG 11 Sustainable Cities and Communities
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SDG 12 Responsible Consumption and Production
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Collaborations and top research areas from the last five years
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Application of Geological Strength Index to Development of Bearing Capacity Chart for Carbonate Rocks
Arman, H. (PI) & Yagiz, S. (PI)
1/1/25 → 12/31/27
Project: International
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A Model Development for the Estimation of Roadheader Performance in Mining and Civil Construction
Yagiz, S. (PI), Copur, H. (Co-PI) & Rostami, J. (Co-PI)
1/1/24 → 12/31/26
Project: FDCRGP
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Development of cryogenic fracturing technology for coalbed methane production in Karaganda Coal Basin, Kazakhstan
Hazlett, R. (PI), Zhang, D. (Co-PI), Yagiz, S. (Co-PI), Ismailova , J. (Co-PI), Teklu, T. (Co-PI), Bekbauov, B. (Co-PI), Wang (SMG), L. (Other Faculty/Researcher), Kneafsey, T. (Other participant), Wu, Y.-S. (Other participant) & Wang, Y. (Other Faculty/Researcher)
1/1/21 → 12/31/24
Project: CRP
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Hard Rock Tunnelling: A Generalized Model for Estimating TBM Performance and Disc Cutter Wear Life
Yagiz, S. (PI), Adoko, A. C. (Co-PI), Rostami, J. (Co-PI) & Hassanpour, J. (Co-PI)
1/1/21 → 12/31/23
Project: FDCRGP
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Multivariate Mapping of Geometallurgical Variables with Complex Cross-Correlation Characteristics
Madani, N. (PI) & Yagiz, S. (Co-PI)
1/1/18 → 6/30/21
Project: FDCRGP
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Comprehensive Models for Estimating Drag Force of Conical Picks Using Relieved Small-Scale LCM Tests Data
Ghorbani, E. & Yagiz, S., 2026, (Accepted/In press) In: Rock Mechanics and Rock Engineering.Research output: Contribution to journal › Article › peer-review
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Explainable Ensemble Machine Learning for Predicting the Drilling Rate of Diamond Core Driller Using SHAP and Integrated Graphic User Interface
Hosseini, S. & Yagiz, S., 2026, (Accepted/In press) In: Rock Mechanics and Rock Engineering.Research output: Contribution to journal › Article › peer-review
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TBM penetration rate estimation using Rock Mass Rating (RMR) and machine specifications
Olaiya, T. D., Yagiz, S. & Adoko, A. C., Jul 2026, In: Rock Mechanics Bulletin. 5, 3, 100328.Research output: Contribution to journal › Article › peer-review
Open Access -
Theoretical prediction method for settlement of existing tunnel induced by undercrossing
Zhou, P., Wang, J., Song, Z., Tian, X., Zhang, Y., Xiao, W. & Yagiz, S., Jul 2026, In: Transportation Geotechnics. 62, 102111.Research output: Contribution to journal › Article › peer-review
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Advancements in Underground Infrastructures
Khandelwal, M., Armaghani, D. J., Bhatawdekar, R. M., Samui, P. & Yagiz, S., Jan 1 2025, CRC Press. 459 p.Research output: Book/Report › Book
Activities
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United Arab Emirates University
Yagiz, S. (Visiting researcher)
Feb 19 2025 → Mar 1 2025Activity: Visiting types › Field trip
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Machine Selection Criteria for Excavation and Construction in Rock Mass Conditions
Yagiz, S. (Keynote speaker)
Sept 3 2025 → Sept 6 2025Activity: Talk or presentation › Invited talk
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Rock mass and groundwater interaction for underground excavations
Yagiz, S. (Keynote speaker)
May 15 2024Activity: Talk or presentation › Invited talk
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Xi'an University of Architecture and Technology
Yagiz, S. (Visiting researcher)
Oct 15 2024 → Oct 25 2024Activity: Visiting types › Visiting an external research institution
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Hacettepe University
Yagiz, S. (Visiting researcher)
Dec 3 2024 → Dec 13 2024Activity: Visiting types › Visiting an external research institution
Prizes
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Associate Editor of Tunnelling and Underground Space Technology Journal
Yagiz, S. (Recipient), Jan 1 2019
Prize: Honorary award
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File
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In 2000, among the Best PhD Students recognized by Turkish Ministry of Education in the USA
Yagiz, S. (Recipient), 2000
Prize: Honorary award
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Medal from the National Science and Higher Education of Kazakhstan, NO: 01037
Yagiz, S. (Recipient), Dec 15 2024
Prize
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Nazarbayev University, Team Building Award (Aerobatics) 2019
Yagiz, S. (Recipient), 2019
Prize: Honorary award