JRMGE / Vol 11 / Issue 3

Review

Rock mechanics contributions to recent hydroelectric developments in China

Xia-Ting Feng, Yang-Yi Zhou, Quan Jiang

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a Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University, Shenyang, 110819, China
b State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China


2019, 11(3): 511-526. doi:10.1016/j.jrmge.2018.09.006


Received: 2018-08-14 / Revised: 2018-08-31 / Accepted: 2018-09-04 / Available online: 2019-02-05

2019, 11(3): 511-526.

doi:10.1016/j.jrmge.2018.09.006


Received: 2018-08-14

Revised: 2018-08-31

Accepted: 2018-09-04

Available online: 2019-02-05


Abstract: Rock mechanics plays a critical role in the design and construction of hydroelectric projects including large caverns under high in situ stress, deep tunnels with overburden more than 2500 m, and excavated rock slopes of 700 m in height. For this, this paper conducts a review on the rock mechanics contributions to recent hydroelectric developments in China. It includes the development of new testing facilities, mechanical models, recognition methods for mechanical parameters of rock masses, design flowchart and modeling approaches, cracking-restraint method, governing flowchart of rock engineering risk factors enabling the development of risk-reduced design and risk-reduced construction, and initial and dynamic design methods. As an example, the optimal design of underground powerhouses at the Baihetan hydroelectric plant, China, is given. This includes determination of in situ stresses, prediction of deformation and failure depth of surrounding rock masses, development of the optimal excavation scheme and support design. In situ monitoring results of the displacements and excavation damaged zones (EDZs) have verified the rationality of the design methodology

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Keywords: Headrace tunnels, Cavern groups, Dam foundation, Rock spalling, Rockburst, Deep , cracking

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Xia-Ting Feng, Yang-Yi Zhou, Quan Jiang, 2019. Rock mechanics contributions to recent hydroelectric developments in China. J. Rock Mech. Geotech. Eng. 11 (3), 511-526.

Author(s) Information

Prof.  Xia-Ting Feng
xtfeng@whrsm.ac.cn
fengxiating@mail.neu.edu.cn

Prof. Xia-Ting Feng received his PhD degree at Northeastern University of Technology (now Northeastern University since 1993), China in 1992 and then took the position of lecturer, associate professor and professor at the same university. He joined Institute of Rock and Soil Mechanics, Chinese Academy of Sciences (CAS) in 1998 as a Professor of Hundred Talent Program of the CAS and as Deputy Director in Charge and Director in 2001–2005. He has worked as Director of State Key Laboratory of Geomechanics and Geotechnical Engineering since 2007. He works at Northeastern University, China as a Vice President since September 2017. In February 2021, he became president of Northeastern University. He is President of Federation of International Geo-engineering Societies−FedIGS, President of International Society for Rock Mechanics (ISRM) Commission on Design Methodology, member of ISRM Commission on Testing Methods, and President of Chinese Society for Rock Mechanics and Engineering (CSRME). He was the past President of ISRM 2011–2015. He is also Editor-in-Chief of Journal of Rock Mechanics and Geotechnical Engineering (JRMGE), and Associate Editor-in-Chief of Chinese Journal of Theoretical and Applied Mechanics. He is member of Editorial Board of Rock Mechanics and Rock Engineering. His research interests cover rock mechanics for deep rock engineering. He published more than 200 technical papers and the English books “Rock engineering design” and “Rock engineering risk” with Professor John Hudson. He has edited five volumes of the book “Rock mechanics and rock engineering” (CRC Press) and the book “Rockburst” (Elsevier).