Article
Engineering, Multidisciplinary
Jinfeng Zou, Penghao Zhang
Summary: This study proposes a comprehensive model to predict the yield and failure patterns of rock bolts, highlighting the decoupling between the bolt and grout, as well as the yield and failure patterns of two potential points along the bolt through a combination of analytical and numerical methods.
APPLIED MATHEMATICAL MODELLING
(2021)
Article
Engineering, Geological
Are Havard Hoien, Charlie C. Li, Ning Zhang
Summary: The study investigates the pull-out mechanism of fully grouted bolts under different embedment conditions, identifying three failure mechanisms and their corresponding loading conditions. The research results show that the embedment length of bolts is crucial, including elastic deformation length, plastic deformation length, and completely debonded length.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Engineering, Geological
Shubo Zhang, Changsheng Wang, Gang Wang, Xin Zheng, Hui Guan, Tingfang Liu, Feng Xu
Summary: This study investigates the shear behaviors of jointed rocks reinforced by BFRP bars and SFCBs. The results show that BFRP bolted specimens have lower shear stiffness but higher residual shear strength compared to steel bars and SFCBs. The peak shear strength is highest for SFCB-reinforced jointed rock, and the residual strength is similar to steel bar bolted specimens. The energy absorption is comparable between BFRP and steel bolted specimens.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Engineering, Geological
Yuzong Li, Guoshao Su, Xige Liu, Lei Wang, Guangyong Cao, Jianyong Pang
Summary: This study investigates the supporting effect of rebar bolts on hard rock structural planes under high stress through shear tests. The results show that the insertion of rebar bolts can change the slip mode of structural planes, delaying shear-induced dynamic failure and reducing its intensity and destructiveness.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2023)
Article
Construction & Building Technology
Xin Wang, Zheqi Peng, Lining Ding, Jing Lu, Zhongguo Zhu, Zhishen Wu
Summary: This study investigated the mechanical behaviors of basalt fiber-reinforced thermoplastic rebars, revealing their ductility under interlaminar shear force. In comparison, rebars fabricated with glass fiber or thermosetting resin matrix showed higher strength but lacked corresponding ductility.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Mechanical
Dewen Jia, Cheng Cai, Yunpeng Li, Xiwen Deng, Jilin Lei, Wei Deng, Huiping Ji
Summary: This paper investigates the finite element model of the conrod bolt and the influence of thread structure on the distribution of axial stress. It is found that the Spiralock anti-loosening thread can improve stress distribution and enhance fatigue strength and life span.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Geochemistry & Geophysics
Yu Wang, Yingjie Xia
Summary: Rock dynamic shear failure behavior is influenced by the presence of natural fractures, with the evolution of stress hysteresis loops and damage accumulation being impacted by these fractures. A damage evolution model based on dissipated energy was proposed to describe the two-stage damage propagation during cyclic loading, showing good agreement with irreversible strain, energy dissipation, and failure morphology. It is suggested that rock structural characteristics play a significant role in determining the shear failure behavior and energy dissipation patterns.
Article
Engineering, Geological
Piotr Malkowski, Xiaowei Feng, Zbigniew Niedbalski, Mateusz Zelichowski
Summary: This study examines the interaction between bolts and rock, investigates the impact of different bonding agents on bolt installation, and analyzes their mechanical behavior. The results show that the numerical model can effectively support the experimental results, and the simulation results provide insights into the relationship between bonding materials and rock strata.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Engineering, Geological
Weiteng Li, Xiuming Li, Yuchun Mei, Gang Wang, Wendong Yang, Hongtao Wang
Summary: This paper presents the mechanical models and numerical simulation methods for energy-absorbing anchor bolts in practical engineering applications. Based on laboratory test results, criteria for energy absorption and breakage are defined, and mechanical models for five different types of energy-absorbing anchor bolts are developed. Numerical simulations demonstrate the effectiveness of these models and their ability to simulate the support of deep coal mine roadways.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2022)
Article
Construction & Building Technology
Yuanjian Liu, Yang You, Yunyan Bai, Tianxi Cheng, Peijun Wang, Wenchao Zhang, Fangzhou Liu
Summary: This study conducted a series of tests to investigate the tensile performance of Thread-anchored One-side Bolted (TOB) Square Hollow Section (SHS) column connections at high temperature. The results showed that the failure mode of TOB bolted SHS column connection was influenced by the wall thickness of the SHS column, the bolt diameter, and the T-stub flange thickness. The change in temperature or applied load had negligible impact on the failure mode. The hole threads provided reliable anchorage to the connection before yielding, demonstrating the reliability of the TOB connection at different temperatures. The fire temperature and the load ratio significantly affected the tensile resistance of the connection at high temperature.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Engineering, Geological
Haichun Ma, Luwang Chen, Xiaohui Tan, Jiazhong Qian, Zhitang Lu
Summary: A theoretical model for analyzing the dynamic mechanics of rock bolts is proposed, using a coupling of linear spring and damper to describe the system. The spring coefficient and damper coefficient play key roles between the rock-soil body and bolt, and displacement control equations can be simulated using numerical methods to study the dynamic properties of rock bolts.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2021)
Article
Engineering, Mechanical
Bing-jun Sun, Quan-wei Liu, Wei-teng Li, Xiu-zhang Yang, Bo Yang, Ting-chun Li
Summary: A new numerical model was developed to analyze the tension-shear coupling fracture behavior of rock bolts in engineering rock masses. By comparing the numerical simulation results with experimental data, the reliability of the model was confirmed. The study has important implications for supporting design in roadways or tunnels.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Mining & Mineral Processing
Hao Shi, Lei Song, Houquan Zhang, Wenlong Chen, Huasheng Lin, Danqi Li, Guozhu Wang, Huayun Zhao
Summary: Understanding the progressive debonding mechanism of bolts is crucial for underground safety. This paper conducted laboratory experiments and numerical simulations of pull-out tests. The relationship between the pull-out strength of the bolt and the uniaxial compressive strength of the cement mortar material was established, and the locations of cracks were identified using the acoustic emission technique. The results revealed that the axial displacement of the cement mortar material at the peak load was approximately 5 mm, and the peak load of the bolt increased with the strength of the confining medium.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Geological
Wei Wang, Yishan Pan, Yonghui Xiao
Summary: This study systematically analyzes the challenges faced by the resin anchoring process in coal mine roadway support and proposes a synergistic anchoring technology to address these issues. Theoretical calculations, laboratory tests, and field verification are conducted to demonstrate the improved performance and effectiveness of the synergistic anchoring technology in enhancing the bearing capacity and support capacity of roadways. The findings have significant practical implications and application value.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2022)
Review
Green & Sustainable Science & Technology
Wadslin Frenelus, Hui Peng, Jingyu Zhang
Summary: Selecting and designing suitable support systems for securing underground openings is crucial. Rock bolts play a key role in helping surrounding rocks hold up, but there is a lack of comprehensive reviews on their types and factors influencing their failure. This paper provides an insight into rock bolt types, factors influencing their failure, and proposals for future trends.
Article
Computer Science, Interdisciplinary Applications
Xiaoqing Wang, Hongpu Kang, Fuqiang Gao
COMPUTERS AND GEOTECHNICS
(2019)
Article
Engineering, Geological
Yongzheng Wu, Fuqiang Gao, Jinyu Chen, Jie He
ROCK MECHANICS AND ROCK ENGINEERING
(2019)
Article
Engineering, Geological
Fuqiang Gao, Peter K. Kaiser, Doug Stead, Erik Eberhardt, Davide Elmo
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2019)
Article
Computer Science, Interdisciplinary Applications
Kaikai Zhao, Doug Stead, Hongpu Kang, Branko Damjanac, Davide Donati, Fuqiang Gao
COMPUTERS AND GEOTECHNICS
(2020)
Article
Engineering, Geological
Hongpu Kang, Jinghe Yang, Fuqiang Gao, Jianzhong Li
ROCK MECHANICS AND ROCK ENGINEERING
(2020)
Article
Multidisciplinary Sciences
Fuqiang Gao, Hongpu Kang, Lei Yang
SCIENTIFIC REPORTS
(2020)
Article
Engineering, Geological
Fuqiang Gao, Hongpu Kang, Lei Yang
ROCK MECHANICS AND ROCK ENGINEERING
(2020)
Article
Environmental Sciences
Kaikai Zhao, Doug Stead, Hongpu Kang, Fuqiang Gao, Davide Donati
Summary: This study investigated the influence of multiple factors on hydraulic fracture propagation height using a 3D hydro-mechanically coupled lattice-spring code. The results showed that the height of hydraulic fractures decreases with the increment of minimum horizontal principal stress in adjoining layers, with vertical fracture propagation being promoted in high-modulus layers and inhibited in low-modulus layers. Fracture tip blunting and fluid leak-off into the interface were identified as factors reducing the propagation height of hydraulic fractures.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Engineering, Geological
Fuqiang Gao, Lei Yang
Summary: This study investigates the conversion and release of elastic energy stored in rocks during strainbursts through experimental and numerical simulations. Softer rocks tend to store more elastic energy and thus contribute more to strainbursts in surrounding rocks.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Environmental Sciences
Fuqiang Gao, Jianzhong Li, Jinfu Lou, Shuwen Cao, Xiaomin Liu
Summary: Fractures and collapses occur in the overburden rock strata during longwall panel extraction, and understanding the extent and characteristics of these fractured zones is crucial for evaluating mining-induced issues. This study created both a physical and numerical model to simulate the caving and fracturing process of the overburden strata. The models successfully captured the periodic weighting as the longwall face advances. The study also found that the permeability of a fractured zone can be evaluated by measuring the voids and fractures within the region.
ENVIRONMENTAL EARTH SCIENCES
(2022)
Article
Engineering, Geological
Zhiguo Lu, Wenjun Ju, Fuqiang Gao, Kang Yi
Summary: The study found that the mechanical behavior becomes less sensitive to heterogeneity as the loading rate increases. Higher loading rates result in less localized failure in the pre-peak stage, smoother axial stress-axial strain curves before peak stress, and greater uniaxial compressive strength and Young's modulus. Additionally, higher loading rates lead to more brittle post-peak behavior and more severe damage to coal samples at the final loading stage. The sandstone sample exhibits deformation rebounding in the post-peak stage, contributing to the energy transition from strain energy stored in the sandstone to cracking energy of the coal sample during coal failure. Higher loading rates also result in greater rebounding speed of the sandstone, causing more severe damage to the coal sample.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Engineering, Environmental
Hongpu Kang, Jianzhong Li, Guiyang Yuan, Fuqiang Gao, Xiaoqing Wang, Jinghe Yang
Summary: Rockbolting is commonly used in civil and mining engineering as a support system, but its mechanics in highly fractured rock mass conditions are not well understood. This study constructed large-scale physical models to evaluate the bearing capacity of incoherent rock blocks reinforced by rockbolts. The results showed that lateral confinement and surface support play important roles in the load bearing and deformation capacity of the rock blocks.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Energy & Fuels
Xiaoqing Wang, Fuqiang Gao
Summary: Accurate estimation of the triaxial compression behavior of jointed coal is essential for coal mining. Few studies addressed the triaxial compression behavior of large-scale rock mass, especially with real joint geometry. We employed a numerical synthetic rock mass (SRM) method to study the triaxial compression behavior of jointed coal and revealed the effects of joint and confining-pressure on its behavior.
INTERNATIONAL JOURNAL OF COAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Geological
Fuqiang Gao, Xiangyuan Peng, Guiyang Yuan, Wenju Liu
Summary: This study reveals a significant scale effect in bursting failure of quasi-brittle materials, including mechanical properties, bursting severity, and precursor time. Ejection of localized pieces from the structure's skin is identified as a precursor for catastrophic bursting failure. These findings provide guidelines for predicting strength and behavior at intermediate and large scales using models obtained from laboratory tests.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2023)
Article
Engineering, Geological
Fuqiang Gao, Guiyang Yuan, Wenju Liu, Xiangyuan Peng
Summary: This study investigates the important role of local mine stiffness (LMS) on rock strainbursts through an experimental method. The experiment produces strainbursts resulting from excavation-induced stress concentration and LMS decreasing using in-house built equipment and real coal blocks. The experimental result shows that there is a critical threshold value of LMS below which the coal pillar fails with a bursting pattern. The study proposes a novel method for producing strainbursts and evaluating LMS in the laboratory.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Construction & Building Technology
Zhi Ding, Xiao Zhang, Shao-Heng He, Yong-Jie Qi, Cun-Gang Lin
Summary: This study investigates the longitudinal behavior of a shield tunnel by designing and constructing a reduced-size indoor model. The results show that the longitudinal settlement of the tunnel follows a normal distribution, with the maximum settlement occurring at the central ring and increasing linearly with the applied load. Stress concentration typically occurs on the side of the tunnel waist under surcharge, resulting in transverse elliptical deformation of the entire structure.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Lucia Lopez-de-Abajo, Marcos G. Alberti, Jaime C. Galvez
Summary: Assessing and predicting concrete damage is crucial for infrastructure management. This study quantifies gas concentrations in urban tunnels to achieve this goal.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Chao He, Yinghao Cai, Chenqiang Pu, Shunhua Zhou, Honggui Di, Xiaohui Zhang
Summary: This paper investigates the impact of river channel excavation on adjacent metro tunnels and proposes protective measures based on an engineering project in Fuzhou, China. A three-dimensional finite element model is developed to calculate the displacements and distortion of tunnels under different excavation sequences and soil reinforcement measures. Real-time monitoring confirms that the vertical displacements and diametrical distortion of tunnels are primarily caused by the excavation of the river above the tunnels, while horizontal displacements are induced by the excavation next to the tunnels. The study recommends a combination of cement slurry with a portal form and concrete with a plate form for soil reinforcement and tunnel protection.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Yaosheng Liu, Ang Li, Feng Dai, Ruochen Jiang, Yi Liu, Rui Chen
Summary: In this study, a hybrid model based on a multilayer perceptron (MLP) and meta-heuristic algorithms was developed to improve blast performance during tunnel excavation. Precise prediction of post-blasting indicators was important for optimization, and a comparison of meta-heuristic algorithms was conducted to find the most suitable model. The results showed that the developed model effectively reduces overbreak areas and quantitatively analyzes the influence of geological conditions.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Xiang Shen, Yifan Chen, Liqiang Cao, Xiangsheng Chen, Yanbin Fu, Chengyu Hong
Summary: In this paper, a machine learning-based method for predicting the slurry pressure in shield tunnel construction is proposed. By considering the influence of fault fracture zones and setting the formation influence coefficient, the accuracy of the prediction is significantly improved.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Shuying Wang, Zihao Zhou, Xiangcou Zheng, Jiazheng Zhong, Tengyue Zheng, Changhao Qi
Summary: A real-time assessment and monitoring approach based on laser scanning technology and point cloud data analysis was proposed to address the hysteresis in assessing the workability of conditioned soils and the inefficiency in estimating the soil volume flow rate in tunnelling practice. The approach was successfully applied in identifying the workability of conditioned soil and its discharge rate in the EPB shield tunnelling project.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Peng Jiang, Benchao Liu, Yuting Tang, Zhengyu Liu, Yonghao Pang
Summary: This study introduces a novel deep learning-based electrical method that jointly inverses resistivity and chargeability to estimate water-bearing structures and water volume. Compared with traditional linear inversion methods, the proposed method demonstrates superiority in locating and delineating anomalous bodies, reducing solution multiplicity.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Haoyu Mao, Nuwen Xu, Zhong Zhou, Chun Sha, Peiwei Xiao, Biao Li
Summary: The study focuses on the delineation of rock mass damage zones and stability analysis of underground powerhouse in Lianghekou hydropower station. ESG monitoring system is used to monitor the inner micro-fracture activity of surrounding rock mass in real-time. Engineering analogy method is adopted to forecast the deformation period of surrounding rock mass and analyze the variation characteristics of seismic source parameters. The research results provide references for similar deep underground excavation engineering in terms of design and construction.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Junling Qiu, Dedi Liu, Kai Zhao, Jinxing Lai, Xiuling Wang, Zhichao Wang, Tong Liu
Summary: This study focuses on the construction surface cracks of large cross-section tunnels in loess strata of China. The mechanism of surface crack formation is analyzed, and factors such as settlement deformation, construction scheme, and surrounding soil environment are identified as the main contributors. Numerical simulations were conducted to gain a deeper understanding of the influence of factors on surface cracks in loess tunnel construction. Specific measures for prevention and treatment of construction surface cracks are proposed to provide new ideas for surface crack control in loess tunnels.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Ting Shang, Jiaxin Lu, Ying Luo, Song Wang, Zhengyu He, Aobo Wang
Summary: The study reveals significant variations in car-following behavior across different types of tunnels and consecutive sections of the same tunnel. As tunnel length increases, the driving stability of following vehicles decreases, but the level of driving safety risk is not positively correlated with tunnel length. Significant vehicle trajectory oscillation is observed within the inner sections of long and extra-long tunnels, and a significant relationship between the acceleration of following vehicles and the location within the tunnel section is found.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Rusi Zeng, Zhongwei Shen, Jun Luo
Summary: The urban underground complexes (UUCs) in China have been effective in solving urban problems, but users have expressed dissatisfaction with the internal physical environment. Personal characteristics and environmental factors play significant roles in determining users' satisfaction.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Gabriel Lehmann, Heiko Kaeling, Sebastian Hoch, Kurosch Thuro
Summary: Analysing and predicting the advance rate of a tunnel boring machine (TBM) in hard rock is important for tunnelling projects. This study focuses on small-diameter TBMs and their unique characteristics, such as insufficient geotechnical information and special machine designs. A database of 37 projects with 70 geotechnically homogeneous areas is compiled to investigate the performance of small-diameter TBMs. The analysis shows that segment lining TBMs have higher penetration rates, and new approaches for the penetration prediction of pipe jacking machines in hard rock are proposed.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Ting Ren, Ming Qiao, Jon Roberts, Jennifer Hines, Yang-Wai Chow, Wei Zong, Adrian Sugden, Mark Shepherd, Matthew Farrelly, Gareth Kennedy, Faisal Hai, Willy Susilo
Summary: Long-term exposure to coal and silica dust during underground tunnelling operations is a growing concern. To bridge the gap between knowledge in dust exposure monitoring and frontline workers, a virtual reality educational tool was developed to visualize ventilation and dust flow characteristics. This tool allows workers to better understand decision-making and best practices for dust controls.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Dong Lin, Zhipeng Zhou, Miaocheng Weng, Wout Broere, Jianqiang Cui
Summary: Metro systems play a vital role in the transportation, economic, environmental and social aspects of cities. The uncertainties in construction, passenger comfort and safety, as well as efficiency and reliability of the metro system, have been widely studied. Metro systems influence urban development and have a positive impact on housing prices, public health, and environmental quality. Further research is needed to fill the research gaps and make recommendations for future studies.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Wei Yu, Bo Wang, Xin Zi, Jie Dong
Summary: In this study, a whole-process analytical theory for the coupled deformation of deep circular tunnel surrounding rock and prestressed yielding anchor bolt (cable) system is derived and validated through numerical simulations. The results show that anchor bolts (cables) can significantly reduce the convergence of surrounding rock, and factors such as support timing and anchor cable length have important effects on the support effectiveness.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
