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Prof. Shengqi Yang obtained his BSc and MSc degrees in Mine Construction and Engineering Mechanics from Jiaozuo Institute of Technology (now Henan Polytechnique University), China, in 2000 and 2003, respec-tively, and his PhD degree in Geotechnical Engineering from Hohai University, China, in 2006. In 2007-2008, he undertook further post-doctoral research at the Ecole Polytechnique de Paris in France. Since December 2008, he has been employed as an Associate Professor at the School of Mechanics and Civil Engineering, China University of Mining and Technology. From January 2012 to July 2024, he held the position of Full-time Professor in the School of Mechanics and Civil Engineering, China University of Mining and Technology. In July 2024, he joined the School of Civil Engineering and became the executive director of the Center of Rock Mechanics and Geohazards, Shaoxing University as a Full-time Professor. In 2014 and 2015, he was awarded an Endeavour Research Fellowship in Australia and commenced his research in the Department of Civil Engineering, Monash University as a visiting professor. Since 2016, he has engaged in a number of international collaborative research projects at Nanyang Technological University, (Singapore), The University of Nottingham (UK), Monash University (Australia), and Imperial College London (UK) as a visiting professor. In 2012, he was awarded the Program for New Century Excellent Talents in University, a grant provided by the Ministry of Education of China. In 2015, he was awarded financial support from the Natural Science Foundation of Jiangsu Province for Distinguished Young Scholars. His research interests cover deep rock mechanics and underground engineering. To date, he has published one Chinese and two English monographs. Additionally, he has published more than 200 peer-reviewed papers and received seven provincial and ministerial-level scientific and technological achievement awards. He was also one of the 2019-2024 Chinese Most Cited Researchers in the field of civil engineering. He has applied for more than 40 national invention patents, of which 34 have been granted. He is an editorial board member of several journals, including "Engineering Geology", "Rock Mechanics and Rock Engineering", "Computers and Geotechnics", "Geomatics, Natural Hazards and Risk" and he is also the associate editor of "Geomechanics and Geophysics for Geo-Energy and Geo-Resources".
Outline
Thermal cycling and stress fatigue are recognized as principal factors that induce the Kaiser effect of rock in deep earth rock engineering. Nevertheless, existing scholarly investigations about the mechanical properties of rocks subjected to the synergistic effects of these perturbations have remained insufficient. In this study, conventional triaxial compression tests, multistage equal-amplitude fatigue (MEF) and multistage variable-amplitude fatigue (MVF) tests were conducted on marble subjected to different numbers of thermal cycles, integrated with nuclear magnetic resonance (NMR) and depth-sensing indentation (DSI) micro-monitoring methods, and the rock constitutive equation was established from the perspective of statistical microscopic damage. The results indicated that the increasing number of thermal cycles significantly weakened the physical and mechanical properties of marble, as evidenced by degradations in strength, deformation, and energy parameters. The reversible deformation evolutions of the rock under two stress paths were diametrically opposed. DSI results revealed that the microcellular mechanical parameters of hornblende and dolomite exhibited greater variability, although both conform to Weibull distribution functions. Additionally, NMR analysis showed that the porosity of the marble was 1.6% initially and increased to 3.3%, 4.1%, 5.8%, and 10.9% after 2, 4, 6, and 8 thermal cycles, respectively. The coupled thermal-mechanical damage constitutive model can effectively describe the deformation behavior of marble under complex perturbations, with distribution parameters m0 and T0 decreasing linearly with the number of thermal cycles.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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