Discussion of Some Issues on the Calculation of the Gear Tooth Root Bending Stress in the Gear Bending Fatigue Test by Xu Kefei, Wang Dong, Liu Yufan, Zhang Erliang

“…The effects of the deviation between the actual tensile strength and the reference tensile strength on the results of calculation are researched. Also,the static stress analysis is carried out on the tooth root bending stress by using the SolidWorks Simulation module,and the analytical results are close to the theoretical calculation results,which verifying the accuracy of the theoretical calculation results.…”
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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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Research Anti-Impact Mechanism of Roof Presplitting Blasting in Deep Composite Thick and Hard Key Strata by Xiaoqi Hao, Gang Han, Hu Liu, Jiahao Xie, Yawu Shao, Yin Zhang, Jinglong Cao, Qian Zhao

“…As an important means to control the hard roof, presplitting blasting is the main measure for controlling rock burst disaster in the key strata of the deep mine in the west. …”
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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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Modelling Seismically Induced Mesothermal Goldfields along the Deep-Rooted Cadillac-Larder Lake Fault, Abitibi, Canada by Pierre Bedeaux, Silvain Rafini, Pierre Pilote, Réal Daigneault

“…Gold deposits are not uniformly distributed along major faults due to complex (and long-debated) interactions between seismicity, hydrothermalism, and structural heterogeneities. Here, we use static stress modelling (SSM) to quantitatively investigate these interactions, by exploring the role of Cadillac-Larder Lake Fault (CLLF) Archean seismicity in the genesis of the regional goldfields. …”
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The Dynamic Damage Mechanisms and Failure Modes of Coal-Rock Masses under the Action of High Order P-Waves by Feng Li, Mingxin Bi, Jing Tian, Shuhao Fang

“…It has been determined that coal-rock masses mainly show shear-compression failures under static pressure. …”
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Experimental Study on Sedimentary Rock’s Dynamic Characteristics under Creep State Using a New Type of Testing Equipment by Wanpeng Huang, Wenbin Xing, Shaojie Chen, Yang Liu, Kai Wu

“…Compared to the currently available equipment for studying rock dynamics, this new type of experimental system provides a long-term and stable high static stress to maintain the creep state of rock specimen. …”
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FINITE ELEMENT ANALYSIS AND OPTIMIZATION OF TOP BEAM STRUCTURE FOR ADVANCE SUPPORTING EQUIPMENT OF ARCH by MAO Jun, GUO GuangLing, XIE Miao

“…In order to study the structural stability of the device,the multi-point distributed static model of the advanced support roof is established based on the actual working conditions. …”
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Study on Pressure Relief Zone Formed Inside Roadway Rib by Rotary Cutting with Pressurized Water Jet for Preventing Rock Burst by Zeng-Qiang Yang, Chang Liu, Hui-Wu Jin

“…Based on the engineering geological conditions of mining area 2502 in Yanbei coal mine as a background, the comprehensive index method is used to evaluate the rock burst risk of mining area 2502, and the burst tendency of coal seam 5# under natural and water-saturated conditions is also tested in laboratory. …”
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Experimental study on strength degradation and meso-structural characteristics of saturated sandstone under freeze-thaw cycles by Haotian XIE, Ying XU, Qiangqiang ZHENG, Meilu YU, Shoudong XIE, Chengjie LI

“…In order to investigate the mechanical properties and microstructural degradation patterns of slope rocks subjected to freeze-thaw cycles, this study conducted static compression tests on fully saturated sandstone specimens exposed to varying numbers of freeze-thaw cycles (0、20、40、60、80 cycles). …”
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Influence of Involute Cylindrical Gear Tooth Profile Modification on the Stress of Gear Tooth by Xiao Han, Xinli Xu

“…According to the equation, the finite element analysis model of different modification parameters is established. The static finite element analysis of the gear is carried out by using the software of Ansys Workbench, the stress cloud diagram of gear tooth root is obtained. …”
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Failure prediction of fissured rock under freeze-thaw cycles based on critical slowing down theory of acoustic emission multi-parameter by Xiaodie Liang, Zhixiang Liu, Kang Peng, Houqiang Wang, Shuangxia Zhang, Congxiang Yuan

“…Fissured rocks in cold regions are affected by freeze-thaw (FT) cycles and stress disturbances, posing significant challenges to engineering projects in these areas. …”
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Les charpentes à entrait retroussé moisé : exemples orléanais des XVe et XVIe siècles by Clément Alix, Julien Noblet

“…This method of construction, demonstrating a perfect mastery of the statics of a roof structure from its design with a view to reinforcing the triangulation of the truss, rapidly established itself in a local architectural context marked by the rare use of “chevrons-formant-fermes” (common rafters forming a bent). …”
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Research on Seepage Properties and Pore Structure of the Roof and Floor Strata in Confined Water-Rich Coal Seams: Taking the Xiaojihan Coal Mine as an Example by Hailong Li

“…However, the water comes from the static and original reserves in coal seams, which have a weak link to other aquifers in the roof and floor strata. …”
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Curieux objet de genre, le livre et sa place dans des inventaires après décès à Lille au XVIIIe siècle by Aurore Pinceel

“…The source, very well-known to historians of material culture and the book of the modern period, is certainly one of the best examples of the importance for gender historians to rethink the methodological tools available in order to process documents that, at first glance, appear to have revealed all their secrets. …”
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