Deformation Mechanism and Support Technology of Deep and High-Stress Soft Rock Roadway by Lujing Zheng, Yujun Zuo, Yafei Hu, Wei Wu

“…In this study, the analysis and control of stability of surrounding rock in deep fractured soft rock roadway located in the underground mine of Jinfeng gold mine in Guizhou Province, China, has been investigated. …”
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Study on In Situ Stress Measurement and Surrounding Rock Control Technology in Deep Mine by Zhongcheng Qin, Bin Cao, Yongle Liu, Tan Li

“…Through the field monitoring test results, it is found that the maximum roof subsidence is 86 mm, the maximum floor deformation is 52 mm, and the maximum deformation of two sides is 125 mm. The surrounding rock control effect of the roadway is good, and the surrounding rock deformation conforms to the engineering technology standard requirements. …”
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Permeability Experiment of Fractured Rock with Rough Surfaces under Different Stress Conditions by Zilong Zhou, Jing Zhang, Xin Cai, Shanyong Wang, Xueming Du, Haizhi Zang

“…To investigate the permeability changes and the mechanisms of fractured rock under dynamic and static stresses produced by earthquakes, permeability experiments on fractured rock with rough surfaces under axial dynamic and static stresses were conducted on the MTS815 Rock Mechanics Testing System. …”
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A compressive damage model for a rock considering the microcrack mechanical behavior by Cui LIU, Zhong LI, Feiya XU, Mo ZHANG, Xiaowei CAO, Heng LEI

“…The contributions of the microcrack sliding and propagation to the rock total deformation, the mixed propagation criterion of the microcrack, and the influence of the rock damage degree on the number of the activated microcracks are not completely considered in the existing rock compressive damage model. …”
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Rock-Arch Instability Characteristics of the Sandstone Plate under Different Loading Conditions by Shuren Wang, Paul Hagan, Baowen Hu, Kanchana Gamage, Cheng Yan, Dianfu Xu

“…Under the concentrated loading and the uniform loading, the tests on the brittle fracture and the hinged arching until the rock-arch instability of the sandstone plate were conducted using self-developed loading device, and the sensitivity of influent factors on the rock-arch failure was analyzed by numerical test based on the particle flow code (PFC). …”
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Experimental Study on Dynamic Performance of Rock-Concrete Composite with Different Thickness Ratios by Qi Ping, Kaifan Shen, Qi Gao, Chen Wang, Shuo Wang, Yulin Wu, Jing Hu

“…In dynamic loading combination behind the rock specimen with concrete cushion, absorb energy decrease with the increase of rock accounted concrete; when the rock is 25 mm, total absorption energy reached its lowest point; when the thickness of the rock is greater than the thickness of concrete, concrete and adjacent parts of rock joint cushion absorb the energy into a rising trend. …”
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Blacking Up : Une histoire du rock au prisme du blackface by Keivan Djavadzadeh

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Study on Dynamic Behavior and Energy Dissipation of Rock considering Initial Damage Effect by Aihong Lu, Jinhai Xu, Yu Xia, Lei Sun

“…To explore the influence of initial damage on the dynamic characteristics of rock mass, the Φ 50 mm split Hopkinson pressure bar (SHPB) test system was used, and the uniaxial impact compression tests on yellow sandstone specimens with different damage degrees were conducted, and then the variation law of mechanical properties of rock specimens with the initial damage was determined. …”
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Strength Characteristics of Nonpenetrating Joint Rock Mass under Different Shear Conditions by Qingzhi Chen, Yuanming Liu, Shaoyun Pu

“…The mechanical property of jointed rock mass is an important factor to be considered in the analysis, evaluation, and design of actual rock engineering. …”
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Effects of Freezing and Thawing Cycle on Mechanical Properties and Stability of Soft Rock Slope by Yanlong Chen, Peng Wu, Qing Yu, Guang Xu

“…To explore the variation laws of mechanical parameters of soft rock and the formed slope stability, an experiment was carried out with collected soft rock material specimens and freezing and thawing cycle was designed. …”
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Experimental Study of Bilinear Initiating System Based on Hard Rock Pile Blasting by Yusong Miao, Xiaojie Li, HongHao Yan, Xiaohong Wang, Junpeng Sun

“…It is difficult to use industrial explosives to excavate hard rock and achieve suitable blasting effect due to the low energy utilization rate resulting in large rocks and short blasting footage. …”
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Study of the Influence of Clay Minerals on the Mechanical and Percolation Properties of Weakly Cemented Rocks by Shiru Guo, Hai Pu, Mengsen Yang, Ding Liu, Ziheng Sha, Junce Xu

“…The weakly cemented rock layer is easily damaged under the combined effect of seepage and mining disturbance and creates massive engineering disasters. …”
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Microseismic Monitoring, Positioning Principle, and Sensor Layout Strategy of Rock Mass Engineering by Tianhui Ma, Daoyuan Lin, Chun’an Tang, Kedar Prasad Yadav, Zhiqiang Feng, Ke Ma

“…Microseismic monitoring technology can start from the most initial stage of rock deformation and track and monitor the progressive failure process of rock mass from the fracture of rock blocks to the instability of rock mass. …”
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Experimental and Numerical Evaluation of Rock Dynamic Test with Split-Hopkinson Pressure Bar by Kang Peng, Ke Gao, Jian Liu, Yujiao Liu, Zhenyu Zhang, Xiang Fan, Xuyan Yin, Yongliang Zhang, Gun Huang

“…Feasibility of rock dynamic properties by split-Hopkinson pressure bar (SHPB) was experimentally and numerically evaluated with ANSYS/LS-DYNA. …”
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The Application of Intuitionistic Fuzzy Set-TOPSIS Model on the Level Assessment of the Surrounding Rocks by Xin-bao Gu, Ying Ma, Qi-hong Wu, Yang-bing Liu

“…The level assessment of surrounding rocks in underground tunnels has essential significance for the stability of surrounding rocks. …”
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Modeling of Shear Crack Propagation in Rock Masses Using Mesh-Free LRPIM by Qingbo Li, Nengxiong Xu, Weifeng Wan, Yazhe Li

“…This method avoids the loss of accuracy caused by the mesh in the analysis of fracture propagation, and the crack propagation of rock brittle material is simulated. The investigation indicates that (1) the LRPIM results are close to the FDM results, which demonstrates that it is feasible to analyze shear cracks in rock masses. (2) Compared with the results of the built-in oblique crack model, when the LRPIM is used to analyze crack propagation, the results are close to the experimental results, showing that the LRPIM can model shear crack propagation in a rock mass. (3) The propagation path using the LRPIM is not sufficiently smooth, which can be explained as the crack tip stress and strain not being sufficiently accurate and still requiring further improvement.…”
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Equivalent Permeability Distribution for Fractured Porous Rocks: Correlating Fracture Aperture and Length by Tao Chen

“…This study quantitatively investigated equivalent permeability distributions for fractured porous rocks, considering the impact of the correlated fracture aperture and length model. …”
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The influence of disturbance location and intensity on the deformation and failure of deep roadway surrounding rocks by Tao Zhang, Yunyun Xu, Chao Wei, Haijian Su, Yujie Feng, Liyuan Yu

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Stability Analysis of Jointed Rock Cutting Slope Based on Discrete Element Method by Wei Zhu, Liang Gao, Yingai Zhao, Chao Yang, Wei Sun, Pengqiang Yu

“…The joints in the rock mass are essential for the stability of rocky slopes, and the destabilization damage of the slope is often directly related to the joints. …”
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Numerical Simulation of the Supporting Effect of Anchor Rods on Layered and Nonlayered Roof Rocks by Chao Yuan, Lei Fan, Jian-feng Cui, Wei-jun Wang

“…The research results show that when the original rock stress is not considered, the bolt support shows obvious tensile, compressive stress areas and positive and negative displacement areas in the surrounding rock of the roof of the roadway; when the original rock stress is taken into account, the tensile and compressive stress zones and the positive and negative displacement zones of the anchor support in the surrounding rock of the roof plate disappear obviously. …”
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