A Damaged Constitutive Model for Rock under Dynamic and High Stress State by Yan-Long Li, Zong-Yuan Ma

“…The main research work of this paper focuses on the theoretical prediction of the constitutive relationship for rock, concrete, and other quasi-brittle materials under dynamic and complex stress state and the influence of dynamic mechanical behavior of rock on practical engineering problems was studied. …”
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Study on the Mechanism and Control of Rock Burst of Coal Pillar under Complex Conditions by Xingping Lai, Huicong Xu, Jingdao Fan, Zeyang Wang, Zhenguo Yan, Pengfei Shan, Jie Ren, Shuai Zhang, Yanbin Yang

“…In order to explore the mechanism of coal pillar rock burst in the overlying coal body area, taking W1123 working face of Kuangou Coal Mine as the engineering background, the full mining stage of W1123 is simulated by FLAC3D. …”
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Influence of In-Situ Stress on the Energy Transmission of Blasting Stress Wave in Jointed Rock Mass by Qian Dong, XinPing Li, TingTing Liu

“…The results showed that the energy transmission of blasting stress wave in jointed rock mass was affected by both the intact rock and joints, and the energy transmitting coefficients first increased and then decreased with the rise of static load and lateral static load coefficient, indicating that the lower in-situ stress can enhance the energy transmission of stress wave in rock mass to some extent. …”
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Resilient Performance of Self-Centering Hybrid Rocking Columns: Theory, Experiment, and Numerical Simulation by Shi Yan, Tao Wang, Xing Su

“…A novel self-centering hybrid rocking column (HRC) with a replaceable soft steel energy dissipator (RED) is proposed to solve the issue of traditional frame structures being vulnerable to damage during earthquakes and difficult rehabilitation after. …”
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Effect of Seismic Frequency Spectra on Surrounding Rock Damage Evolution of Large Underground Caverns by Yumin Zhang, Zeqi Zhu, Rongchao Xu, Zhiquan Huang

“…To explore the distribution and evolution of the surrounding rock of underground caverns of hydropower stations, the dynamic compression tests for granite sample were carried out and the dynamic constitutive relation suitable to computer programming was established in terms of strain-based static elastic-plastic damage constitutive relation. …”
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Case Study of the Characteristics and Mechanism of Rock Burst near Fault in Yima Coalfield, China by Zhenhua Jiao, Qiupeng Yuan, Peng Zou, Benjun Shi

“…The occurrence and mechanical characteristics of fault have different effects on rock burst and should be considered when evaluating the risk of rock burst.…”
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Study on Roof Breakage-Induced Roadway Coal Burst in an Extrathick Steeply Inclined Coal Seam by Sheng-chuan Wang, Lin-ming Dou, Zong-long Mu, Jin-rong Cao, Xu-wei Li

“…The study demonstrates the following: (1) The abutment pressure of the roof plays a dominant role in stress distribution of the coal seam slice before the breakage of the thick hard roof with the stress of the roof roadway (Rr) being obviously higher than that of the floor roadway (Rf). (2) High-energy MS events and AE events are concentrated on the roof side after the breakage of the thick hard roof, and coal bursts are more easily induced by the superposition of high dynamic and static stresses on the roof side. …”
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Failure Law and Mechanism of the Rock-Loose Coal Composite Specimen under Combined Loading Rate by Genshui Wu, Weijian Yu, Ze Liu, Zhu Tang

“…The uniaxial mechanical test under the constant loading rate and combined loading rate is carried out in the static loading range (0.01∼10 mm·min−1) of the rock-loose coal composite specimen (RCCS). …”
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Numerical Analysis of J-Hook Connectors’ Effect on the Performance of Steel-Concrete Composite Shear Walls by Seyed Mohammad Farnam, Mohsen Khorshidi

“…Due to the necessity of creating a composite functionality, these connectors play an important role in the behavior of the system. Moreover, the effect of J-hook connectors on steel-concrete composite shear walls is investigated. …”
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Load-Bearing Characteristics of Large-Diameter Rock-Socketed Piles Based on Ultimate Load Tests by Xueying Liu, Xiaoyu Bai, Mingyi Zhang, Yonghong Wang, Songkui Sang, Nan Yan

“…As part of a large converter project in Shandong Province, vertical static load tests and internal force tests were conducted on three large-diameter rock-socketed piles, their load transfer mechanism was clarified, and the ultimate side resistance and ultimate resistance performance characteristics of the rock-socketed sections were analyzed. …”
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Time effect of elastic energy release of surrounding rock and evaluation method of reasonable advancing speed by Ruifu Yuan, Qi Ma, Qunlei Zhang, Chun Feng, Chunfu Wei, Yan Gao

“…Abstract To reveal the rock burst mechanism, the stress and failure characteristics of coal-rock strata under different advancing speeds of mining working face were explored by theoretical analysis, simulation, and engineering monitoring. …”
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Rebound Mechanism and Control of the Hard Main Roof in the Deep Mining Roadway in Huainan Mining Area by Denghong Chen, Chao Li, Xinzhu Hua, Xiaoyu Lu, Yongqiang Yuan, Chen Li

“…To control the stability of the top beam and simplify the supporting reaction to limit the deformation of the slope angle, RC and RD are used to construct the statically indeterminate beam. By adding an anchor cable and advance self-moving support to the roadway side angle, the problem of difficult control of the surrounding rock with a large deformation of the side angle roof is solved, which provides a reference for roof control under similar conditions.…”
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Preparation, characterization, and performance of 4A zeolite based on opal waste rock for removal of ammonium ion by Zongshan Wu, Jingjing Xie, Haibo Liu, Tianhu Chen, Peng Cheng, Can Wang, Dianchao Kong

“…Adsorption experiments were performed by 1.0 g l −1 4A zeolite with NH 4 + solution (5–300 mg l −1 ) for 4 h at room temperature. The experiment results revealed with a crystallization time of 3 h, a crystallization temperature of 85°C, Na 2 O/SiO 2 =1.0, H 2 O/Na 2 O = 40, and SiO 2 /Al 2 O 3 =2.0, the 4A zeolite synthesized had excellent performance with cation exchange capacity of 2.93 mmol (g dry zeolite) −1 and static water adsorption of 22.3%. …”
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Dynamic Fracture Toughness and Dynamic Tensile Strength of the Rock from Different Depths of Beijing Datai Well by Ke Man, Xiaoli Liu

“…From the standard test method suggested by ISRM and GB/T50266-2013, the uniaxial static tensile strength, dynamic tensile strength, and dynamic fracture toughness of the same basalt at different depths have been measured, respectively. …”
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Numerical Investigation of the Influence of Roof Fracturing Angle on the Stability of Gob-Side Entry Subjected to Dynamic Loading by Zhibiao Guo, Lei Zhang, Zhibo Ma, Feixiang Zhong, Jingchao Yu, Siming Wang

“…A numerical investigation on the relationship between the entry stability and roof fracturing angle was conducted. In order to investigate the reasonable scope of roof fracturing angle under static and dynamic loadings, the double-yield model was employed to simulate the gob materials, and the input parameters of the model were calibrated meticulously using the method of inversion analysis. …”
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Cross fan-shaped roof-cutting blasting technology for preventing rockbursts in gob-side mining roadways by PAN Junfeng, LIU Shaohong, MA Wentao, GAO Jiaming, MA Hongyuan

“…The interaction between these areas formed a right-angle fan-shaped hanging roof structure. The large hanging roof provided static load, which triggered rockbursts, and dynamic load when ultimate collapse occurred, thus acting as the load source for the occurrence of rockbursts. …”
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Three-Dimensional Numerical Modeling and Roof Deformation Analysis of Yuanjue Cave Based on Point Cloud Data by Zhigang Meng, Manchao He, Zhigang Tao, Bin Li, Gang Zhao, Mingru Xiao

“…For hundreds of years, with the continuous effect of natural forces and the erosion of various deterioration factors, the sidewall and roof rock mass of Yuanjue Cave were eroded, some parts of supporting rock mass were fragmented, and the boundary conditions of the rock mass have deteriorated, which have seriously endangered the Yuanjue Cave; once the roof collapses, the national treasure in the cave will be destroyed. …”
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Crack propagation and CT imaging of internal cracks in rocks damaged by pre-compression under explosive loading by Qiangqiang Zheng, Pingfeng Li, Ying Xu, Bing Cheng, Hao Hu, Hao Shi, Shoudong Xie

“…Innovatively, multi-level cyclic static pre-compression is applied to simulate the random damage distribution in engineering-scale rocks, combined with high-resolution computed tomography (CT) imaging to achieve non-destructive 3D visualization of internal crack morphologies under explosive loading. …”
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Research on Dynamic Stability Optimization of Rock Spreader considering Prevention of Geological Subsidence and Local Collapse in Reclamation Area by Baofu Kou, Pengliang Huo, Xin Shi

“…The research results show that the total weight of key parts such as receiving boom, discharging boom, and the main tower is reduced by about 4.5% (4650 kg), the lower-order vibration frequencies below the fifth order of those parts are not within the resonance range, and the stability of the whole machine is greatly improved, which fundamentally solves the problem of uneven rock stacking caused by impact stability. …”
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Horizontal-Vertical-Rocking Coupled Response Analysis of Vertical Seismic Isolated Structure under Near-Fault Earthquakes by Dewen Liu, Yafei Zhang, Sitong Fang, Yang Liu

“…The vertical damping can significantly control the vertical displacement and rocking moment.…”
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