Article
Engineering, Environmental
Xin Cai, Chuanqing Cheng, Zilong Zhou, Heinz Konietzky, Zhengyang Song, Shaofeng Wang
Summary: Water spraying or injection into rock mass is an effective method for preventing rock bursts in deeply buried hard rock engineering projects. Experimental results indicate that the presence of water significantly weakens the strength and energy storage capacity of rocks, leading to gentler failure patterns and reduced dynamicity. Additionally, a simple mechanical model was established to illustrate the local stress regulation by water penetration.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Engineering, Geological
Zilong Zhou, Peiyu Wang, Xin Cai, Wenzhuo Cao
Summary: Water infusion can decrease the rock-burst proneness of water-bearing sandstone.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Geosciences, Multidisciplinary
Xiaobin Li, Haoteng Wang, Ying Zhao, Haifang Xue, Lingyun Li
Summary: In this study, a new metric called the post-peak dissipated energy index is proposed to evaluate the rock burst proneness of a rock mass, taking into account strain rate and size effects. Compression tests were conducted on limestone and slate samples with different length to diameter ratios and strain rates. The results showed that higher strain rates led to a stronger hardening effect and staged growth of rock burst proneness, while the rock burst proneness decreased non-linearly with increasing length to diameter ratio. The proposed energy-based index provided a reliable evaluation of rock burst proneness and has great potential for practical application in deep rock engineering.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Acoustics
Jiliang Pan, Fenhua Ren, Meifeng Cai
Summary: The research reveals that rock masses with higher joint density have greater dissipation energy, but still have limited resistance to external failure. Rock masses with parallel joints exhibit better strength and higher rockburst proneness compared to those with cross-joints, accumulating more elastic strain energy.
SHOCK AND VIBRATION
(2021)
Article
Chemistry, Multidisciplinary
Zibo Li, Guohua Zhang, Yubo Li, Wenjun Zhou, Tao Qin, Li Zeng, Gang Liu
Summary: Coal-rock disasters are becoming more severe as coal mining intensity increases. The study investigates the effects of different lithologies and coal-rock height ratios on the mechanical properties and energy accumulation of the coal-rock combination. It provides important reference significance for preventing and controlling rock bursts in areas where coal thickness changes.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Geological
Arka Jyoti Das, Prabhat Kumar Mandal, Nilabjendu Ghosh, Awanindra Pratap Singh, Ranjan Kumar, Subhashish Tewari, Rana Bhattacharjee
Summary: Different underground structures and support systems are designed to address severe geotechnical problems during mining of highly stressed coal seams. These designs are based on evaluations of energy accumulation, strain burst potential, stress conditions, and rock mass stability. Numerical modeling is used to implement an energy-based safety factor and identify yield zones in the rock mass. Control measures include leaving optimum size of rib/remnant pillars in goaf and installing adequate support systems in working areas.
ENGINEERING GEOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Zhenhua Ouyang, Gen Li, Qiong Wang, Haiyang Yi, Zhengsheng Li, Qingwen Shi
Summary: This paper investigates the effectiveness of an in-situ modification method in improving the stability of roadways with heightened burst risk. Physical experiments and numerical simulations showed that artificially constructing a cracked zone and a reinforced zone can significantly reduce dynamic stress and improve roadway stability. The thickness and degree of damage to the cracked zone were found to be key factors in reducing energy and improving stability.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Energy & Fuels
Kun Du, Xinyao Luo, Songge Yang, Jahed Armaghani Danial, Jian Zhou
Summary: This paper studies the rockburst tendency indices through laboratory tests and finds that the WPET and AEF can reflect the energy and rockburst proneness of hard rock. Loading rates of the two energy indices are determined and the determination and calculation process are clarified. The results show that the energy index of rock cannot fully reflect the rockburst proneness and a displacement control mode of 0.3-1 mm/min and a load control mode of 50-140 kN/min are recommended for hard rocks.
GEOMECHANICS FOR ENERGY AND THE ENVIRONMENT
(2023)
Article
Engineering, Mechanical
Yanchun Yin, Wuwei Zheng, Xingxue Tang, Minglu Xing, Yubao Zhang, Yuanhui Zhu
Summary: Based on the stiffness theory, this study investigated the influence of loading stiffness on the mechanical behavior of sandstone specimens using an improved rock mechanics testing machine and low stiffness flexible rings. The results showed that the decrease in loading stiffness led to a change in the failure mode of the specimen, and there were correlations between the stiffness ratio and post-peak failure duration, as well as between the stress drop rate and stiffness ratio.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Construction & Building Technology
Hongbo Zhao, Bingrui Chen, Changxing Zhu
Summary: This study utilized microseismic monitoring data to build a decision tree model for predicting and evaluating rockburst, demonstrating that the decision tree can extract rockburst features and provide a feasible approach for rockburst prediction.
ADVANCES IN CIVIL ENGINEERING
(2021)
Article
Mining & Mineral Processing
Fengqiang Gong, Yunliang Wang, Zhiguo Wang, Junfeng Pan, Song Luo
Summary: A new energy criterion called the residual elastic energy index was proposed to evaluate the coal burst proneness more precisely. Through experimental tests and observations, a reliable evaluation criterion for coal burst proneness was successfully established based on the distribution of elastic energy in coal samples.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Xin-Yuan Wang, Yan-Chun Yin, Ming-Lu Xing, Dong-Dong Zhang, Yang Chen, En-Chao Wang
Summary: This paper analyzes the energy evolution process and ejection failure characteristics of granite after unloading, studying the influence of unloading velocity, lateral stress, and axial stress through unloading simulation tests. The results show that the area near the unloading sidewall is the main energy release and rock block ejection area. In the rapid energy release stage, the energy release velocity and dissipation velocity show correlations with unloading velocity, lateral stress, and axial stress. In the rock block ejection stage, increasing unloading velocity and axial stress leads to an increase in rock block ejection force, while an increase in lateral stress decreases the rock block ejection force.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Naigen Tan, Renshu Yang, Zhuoying Tan
Summary: This paper conducted hydrofracturing tests in seven deep boreholes to investigate the impact of faults on geostress accumulation and orientation shift. The results showed that the degree of stress differentiation and its direction varied according to the fault attribute and its position. However, the magnitude and direction of in-situ stress conformed to the regional tectonic stress at a distance from the faults. This study sheds new light on the fault-induced stress accumulation and orientation shift mechanisms.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Diyuan Li, Aohui Zhou, Lichuan Wang, Yuda Chen, Chunde Ma
Summary: Through intensive coring and laboratory testing, the study of the Guobo Station project area in Chongqing revealed that the rock mass is mainly composed of mudstone and a small area of sandstone, with mudstone showing highly scattered strength indicators and sandstone having a higher average compressive strength. Additionally, the water content has a significant impact on the mechanical properties of the rock.
APPLIED SCIENCES-BASEL
(2022)
Article
Green & Sustainable Science & Technology
Zhenkai Ma, Sheng Li, Xidong Zhao
Summary: Research has found that a large amount of energy accumulates in the surrounding rock of mining roadways, forming super-high-density energy packages, which can lead to rockburst accidents when suddenly released. These findings are of significant theoretical importance and practical value for understanding the rockburst mechanism, predicting, and preventing rockbursts.
