Article
Computer Science, Interdisciplinary Applications
Yiguo Xue, Xudong Jiang, Fanmeng Kong, Zhiqiang Li, Huimin Gong, Fan Yang, Hong Chen
Summary: This study explores the characteristics of rock fragmentation in blasting scenarios for jointed rock mass of underground space by creating bonded particle models with discontinuities. The study found that different types of discontinuities have different effects on crack propagation and rock fragmentation.
SIMULATION MODELLING PRACTICE AND THEORY
(2022)
Article
Engineering, Geological
Longqi Li, Nengpan Ju, Daichao Sheng
Summary: This study investigates the failure patterns and response characteristics of interbedded rock slopes with steep layers under seismic motion. The research findings provide insights for assessing landslide hazards in earthquake-prone regions.
ENGINEERING GEOLOGY
(2023)
Article
Engineering, Environmental
Haina Zhang, Xinyang Xu, Yun Zheng, Huan Li, Haosen Guo
Summary: This study investigated the failure mechanism of block-flexure toppling (BFT) using centrifugal and numerical models. The numerical model was calibrated with the results of the centrifuge test and showed generally consistent results. The simulations revealed that slipping failure and opening fractures occurred before instability in the jointed rock slope. Joint parameters, such as joint cohesion and thickness of the rock column, greatly influenced the failure load, while connectivity rates of discontinuous cross-joints and joint friction angle affected the shape and location of the basal failure plane.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Mechanics
Bo Lei, Jianping Zuo, Haiyan Liu, Jintao Wang, Fei Xu, Hongtao Li
Summary: Research on the crack evolution mechanism and fracture behavior of bedding shale is important for shale gas exploitation. Mechanical properties, particularly the anisotropy of shale, significantly affect hydraulic fracture initiation and propagation. The study found that the mechanical properties of weak bedding planes have a significant impact on fracture behavior, and fractal method can quantitatively characterize the evolution of microcracks in bedding shale.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Engineering, Geological
Daping Tai, Shengwen Qi, Bowen Zheng, Chonglang Wang, Songfeng Guo, Guangming Luo
Summary: In this study, the effects of joint row number and inclination on the stress-strain characteristics and failure mode of rock were investigated using numerical models and laboratory direct shear tests. The results showed that joints significantly increased post-peak energy dissipation but had little effect on energy proportion before the peak.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2023)
Article
Computer Science, Interdisciplinary Applications
Wen Wang, Qi-Zhi Zhu, Jin Zhang, Tao Ni, Stephane P. A. Bordas
Summary: This study investigates the step-path failure of rock slopes using peridynamic theory. An extended bond-based peridynamic model is introduced to distinguish between different fracture phenomena. The fracture processes of gypsum specimens are simulated, and the feasibility of the model is verified by comparing with experiments. The progressive failure of rock slopes is analyzed at the field scale, capturing crack initiation, propagation, coalescence, and structural damage. The predicted crack propagation and coalescence types contribute to understanding step-path failure mechanisms.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Geochemistry & Geophysics
Zihan Zhou, Zhonghui Chen, Yanjun Shen, Min Bao, Gengqian Nian, Lingfei Zhang, Yuting Liu
Summary: This study investigated rock slopes with intermittent joints in open-pit mines using speckle technique and plastic limit analysis theory, and found conclusions on failure features, joint failure types, factors influencing slope stability, and instability of local-stable slopes higher than critical instability height.
Article
Engineering, Geological
Tantan Zhu, Jianxun Chen, Da Huang, Yanbin Luo, Yao Li, Longfei Xu
Summary: A new approach based on DEM was developed to simulate the damage of water-rich rock after freeze-thaw cycles, and its effectiveness was validated. The freeze-thaw cycles resulted in a significant increase in volume and porosity of rock samples, while the mechanical properties exhibited an exponential reduction with increasing cycles.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Computer Science, Interdisciplinary Applications
Lei Xing, Wenping Gong, Bing Li, Chao Zhao, Huiming Tang, Lei Wang
Summary: Earthquake-induced rock slope failure is a destructive geohazard that poses serious threats to human lives and properties. The potential hazard of a rock slope under earthquake loading can be assessed by considering the characteristics of failure and runout, which are affected by inherent fractures. Traditional deterministic analysis of rock slope hazard may lead to uncertainties due to differences between arbitrarily chosen discrete fracture networks (DFNs) and true DFNs. To address this issue, this paper proposes a probabilistic analysis that uses multiple realizations of systematically generated DFNs, obtained through Monte Carlo simulation, as inputs for discrete element method (DEM) modeling of slope behavior, thus explicitly considering and evaluating the uncertainty induced by DFN modeling.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Engineering, Geological
Yulong Zhang, Jianfu Shao, Zaobao Liu, Chong Shi
Summary: This paper presents a numerical study on the dynamic behavior of rock avalanches, focusing on the influence of particle shape, size, and gradation on velocity and energy transformation process of falling rock clusters.
Article
Computer Science, Interdisciplinary Applications
Haibin Wang, Yongtao Yang, Guanhua Sun, Hong Zheng
Summary: A nonlinear strength-reduction numerical manifold method (NSRNMM) using a generalized Hoek-Brown (GHB) criterion is proposed in this study to investigate rock slope stability. Implementing two equivalent Mohr-Coulomb (MC) criteria from the GHB criterion, the NSRNMM can accurately calculate the safety factor of rock slopes. Results show that the NSRNMM with the average equivalent MC criterion predicts a more conservative safety factor compared to the instantaneous equivalent MC criterion.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Engineering, Civil
Zhenlong Zhao, Hongwen Jing, Xinshuai Shi, Guansheng Han
Summary: This paper investigates the mechanical behavior of rock containing two pre-existing holes through laboratory tests and numerical simulation. The experimental results reveal significant stress-strain fluctuations and different failure modes caused by the presence of holes in the rock. The numerical simulation further examines the process of crack initiation, propagation, and coalescence, as well as the mechanism of overall instability.
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2022)
Article
Computer Science, Interdisciplinary Applications
Chao Zhang, Jianxin Fu, Yu Wang
Summary: The authors aimed to study the strength failure and cracking behavior of fractured rock under unilateral unloading. They found that prefabricated cracks and unilateral unloading conditions not only deteriorate the mechanical strength but also have significant differences in failure modes. Furthermore, the authors discovered that the model failure mode under unilateral loading conditions is obviously distinct from that in triaxial loading.
ENGINEERING COMPUTATIONS
(2023)
Article
Chemistry, Physical
Wenwei Gao, Hairong Yang, Le Wang, Ruilin Hu
Summary: Through numerical simulations and experimental studies, this paper finds that as the rock block proportion increases, the peak strength of the soil-rock mixtures increases, the fluctuations of the post-peak become more obvious, and the dilatancy of the sample increases. The width of the shear band increases, the distribution of cracks becomes more complex and dispersed, and the range of the shear zone increases. The number of rock blocks with rotation also increases significantly, with rotation angles mostly between -5 degrees and 5 degrees; the strain energy of S-RMs with different rock block proportions follows the same change rule as axial strain, showing a trend of first increasing and then decreasing, like the stress-strain curve.
Article
Engineering, Geological
Kui Zhao, Wenkai Wu, Peng Zeng, Daoxue Yang, Yongguang Liu, Li Wang, Shanhu Ran
Summary: The study investigates the measurement of rock fracture toughness using the CCNBD method and explores the micro-crack evolution mechanism of non-uniform sandstone through numerical simulation. The results indicate that the evolution of micro-cracks is significantly influenced by the sandstone particle size and mineral composition.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Engineering, Geological
Xinpo Li, Yong Wu, Siming He, Lijun Su
ENGINEERING GEOLOGY
(2016)
Article
Environmental Sciences
Xiao-qin Lei, Zong-ji Yang, Si-ming He, En-long Liu, Henry Wong, Xin-po Li
JOURNAL OF MOUNTAIN SCIENCE
(2017)
Article
Mathematics, Interdisciplinary Applications
Xinpo Li, Yanfang Xie, Marte Gutierrez
COMPUTATIONAL PARTICLE MECHANICS
(2018)
Article
Environmental Sciences
Xinpo Li, Siming He
ENVIRONMENTAL EARTH SCIENCES
(2012)
Article
Engineering, Geological
Xinpo Li, Siming He, Yong Wu
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2012)
Article
Engineering, Geological
Xinpo Li, Xiangjun Pei, Marte Gutierrez, Siming He
Article
Environmental Sciences
Wu Yong, He Si-ming, Li Xin-po, Wang Dong-po
JOURNAL OF MOUNTAIN SCIENCE
(2019)
Article
Engineering, Geological
Xinpo Li, Shuxi Zhao, Siming He, Qiwei Yan, Xiaoqin Lei
SOILS AND FOUNDATIONS
(2019)
Article
Engineering, Geological
Xinpo Li, Qiwei Yan, Shuxi Zhao, Yu Luo, Yong Wu, Dongpo Wang
Article
Engineering, Environmental
Qiwei Yan, Xinpo Li, Xiong Tang, Yong Wu, Siming He
Summary: The study reveals that the strength recovery of shear zone soil during the dormant phase of a landslide has a significant impact on the reactivation and stability of the landslide. Experiments on a red-bed landslide soil show obvious healing properties, with the recovery value being influenced by holding time and normal stress. The better the drainage condition, the more noticeable the recovery, as shown by ultrasonic tests.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Geosciences, Multidisciplinary
Xinpo Li, Jun Yao, Yulian Sun, Yong Wu
Summary: This paper presents a monolithic method using material point method (MPM) to model fluid-structure interaction problems encountered in geohazards. The reliability of the MPM approach on these problems is verified through comparisons with laboratory tests.
Article
Engineering, Geological
Xinpo Li, Xiong Tang, Shuxi Zhao, Qiwei Yan, Yong Wu
Summary: This study investigates the runout process of the Daguangbao landslide triggered by the 2008 Wenchuan earthquake. It finds that the landslide mass initially slides along the bedding-plane as a whole body before disintegrating during the runout process. The duration of sliding is 64 seconds with a maximum velocity of 60 m/s. Friction degradation of the slip surface has a significant impact on the final runout distance and depth of the deposit zone.
Article
Engineering, Geological
Xinpo Li, Lijun Su, Yong Wu, Siming He
GEOTECHNICAL AND GEOLOGICAL ENGINEERING
(2015)
Article
Engineering, Geological
Xinpo Li, Siming He, Yu Luo, Andyong Wu
GEOMECHANICS AND GEOENGINEERING-AN INTERNATIONAL JOURNAL
(2011)