Article
Engineering, Geological
Jin-Shuai Zhao, Bing-Rui Chen, Quan Jiang, Jian-Fei Lu, Xian-Jie Hao, Shu-Feng Pei, Fei Wang
Summary: By analyzing the microseismicity induced by blasting at the underground powerhouse of the Baihetan Hydropower Station, it was found that the blast-induced risk areas are mainly concentrated in the downstream sidewall of the powerhouse. Real-time MS monitoring can provide data reference for the dynamic optimization of on-site construction schemes during the excavation process.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Engineering, Civil
Qingwen Ren, Lei Xu, Aixi Zhu, Mingzhang Shan, Linfei Zhang, Jiafeng Gu, Lei Shen
Summary: This paper presents a comprehensive safety evaluation method for surrounding rock during underground cavern construction, including deformation stability and rock block collapse prediction. The method combines complementary and mutually verifying characteristics, along with a comprehensive early-warning index system.
Article
Construction & Building Technology
Jin-Shuai Zhao, Quan Jiang, Jian-Fei Lu, Bing-Rui Chen, Shu-Feng Pei, Zhi-Lin Wang
Summary: This study investigates the excavation-induced fracturing process of surrounding rock in a large underground powerhouse through in situ observation schemes. The relationship between the evolution of microfractures and the macroscopic deformation or failure characteristics of the surrounding rock is clarified, which is valuable for stability analysis and excavation optimization of similar underground caverns.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Meng Wang, An-Chi Shi, Hai-Bo Li, Hong-Chuan Yan, Gang Fan, Jia-Wen Zhou
Summary: The research results of the case study on the Baihetan underground powerhouse help to reveal the failure mechanism caused by the multi-cavern effect, and provide reference for the construction and support optimization.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Geological
Dingping Xu, Xiang Huang, Quan Jiang, Shaojun Li, Hong Zheng, Shili Qiu, Huaisheng Xu, Yonghong Li, Zhiguo Li, Xingdong Ma
Summary: This study presents an integrated approach to estimating the 3D in situ stress field around large deep underground cavern groups near valleys. By deducing the regional tectonic stress field direction, verifying the reliability of in situ stress measurements, regressing the 3D in situ stress field, and modifying and re-verifying the results, the study provides a strategic level analysis of the orientations and magnitudes of the 3D in situ stress field.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2021)
Article
Engineering, Geological
Zhao Wang, Tiehang Wang, Saisai Wu, Yanzhou Hao
Summary: This study presents a polygonal universal distinct element code grain-based model to investigate microcracking behaviors in rocks, which successfully simulates the evolution of cracks and macroscopic fracture patterns. The simulated results are consistent with laboratory tests, contributing to the improvement of rock acoustic emission monitoring and understanding of the damage process in rocks.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2021)
Article
Energy & Fuels
Krzysztof Tajdus, Anton Sroka, Rafal Misa, Antoni Tajdus, Stefan Meyer
Summary: The article introduces a method for predicting the deformation of the land surface over large underground gas storage facilities in salt caverns, considering various parameters while keeping calculations simple. The effectiveness of the method was demonstrated through predicted surface subsidence for the EPE field with 114 underground caverns.
Article
Chemistry, Physical
Murad AbuAisha, Ahmed Rouabhi, Joel Billiotte, Faouzi Hadj-Hassen
Summary: This paper presents a study on hydrogen transport in rock salt during cycling, providing a mathematical-numerical model that couples cavern thermodynamics with hydrogen transport mechanisms. Parameter studies and simulations confirm the dependency of Darcian percolation on model parameters, with Fickian diffusion coefficient indirectly affecting Darcian percolation. Results show that the quantity of hydrogen lost into the surrounding rock salt during cycling is insignificant over a 40-year period on a real-scale typical cavern.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Murad AbuAisha, Joel Billiotte
Summary: Hydrogen is considered as a primary factor in the energy transition towards a cleaner planet. Large-scale storage techniques are necessary due to increasing energy demands, with underground salt caverns showing promise. However, fast solicitations of these caverns to meet quick demands can lead to damage to the surrounding rock salt, creating scientific uncertainties about transport mechanisms.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Construction & Building Technology
Peng Ding, Cheng Shi, Lianjin Tao, Zhiguo Liu, Tao Zhang
Summary: This study summarizes the seismic design methods of large and complex underground pipe structures (LCUP) in hard rock sites. The deformation and internal force response of three representative pipes were studied based on different seismic analysis methods. The advantages, disadvantages, and applicability of the seismic analysis methods on LCUP were explained systematically.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Dunwen Liu, Chong Wang, Yu Tang, Haofei Chen
Summary: In this study, theoretical analysis, field tests, and vibration monitoring were conducted to determine suitable rock mass cracking parameters for excavation of hard rock tunnels near historic sites using high-pressure gas expansion rock-cracking technology. The results showed that the desired rock mass cracking effect could be achieved using the cutting mode of central vertical empty hole + double wedge cutting hole and the auxiliary hole network parameter of 0.8 m x 0.7 m. The measured vibration velocity at a monitoring point 60 m away from the tunnel face in the field test was less than 0.1 cm/s, meeting the vibration control requirements of the historic sites. The research results demonstrate that the high-pressure gas expansion rock-cracking technology has the advantages of low vibration, noise, and flying rocks when there is high-quality hole plugging and no punching, providing a technical reference for excavation of hard rock tunnels near ancient buildings and historic sites.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Geological
Davi Rodrigues Damasceno, Johan Spross, Fredrik Johansson
Summary: This paper investigates the strain concentration in lined rock caverns and the influence of rock joints on the steel lining using finite element analysis. The results highlight the significant impact of rock mass quality and rock joint spacing on the strain distribution in the steel lining.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2023)
Article
Computer Science, Interdisciplinary Applications
Haiyang Zhao, Liangchi Zhang, Zhonghuai Wu, Ang Liu
Summary: This paper presents a new discrete element model for rock-like materials, which is superior to most models in algorithm simplicity and stress analysis. The model is more effective in predicting crack behavior of rock-like materials.
COMPUTERS & STRUCTURES
(2022)
Article
Engineering, Geological
Dong Fu, Chao Su
Summary: This study establishes standards for controlling the deformation of the crown arch region in large underground caverns. The study compares various empirical formulas for calculating the ultimate strain of a rock mass and selects robust and comprehensive formulas. A geometric calculation model for the deformation of the underground cavern crown arch is established, considering uneven deformation. Theoretical analytical methods are used to derive a relationship between the displacement of feature points on the crown arch and the rock mass ultimate strain. The proposed deformation control standard has significant engineering implications in controlling crown arch deformations and evaluating the surrounding rock stability in caverns, as demonstrated by an engineering case study.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Thermodynamics
Xiong Zhang, Wei Liu, Jie Chen, Deyi Jiang, Jinyang Fan, J. J. K. Daemen, Weibiao Qiao
Summary: This study proposes a new carbon cycle model for carbon capture and storage based on the disposal/storage of carbon dioxide (CO2) in salt caverns. The safety and suitability evaluation of CO2 disposal/storage in bedded rock salt caverns in China was carried out. The results show that long-term and medium-term disposal/storage can achieve permanent geological isolation at proper depth and operating pressure, while short-term storage can be achieved by controlling the operating pressure.