Quantitative Characterization of Tight Rock Microstructure of Digital Core by Yuwei Liu, Shuping Wang, Rongchen Zheng, Haosen Li

“…And the pore throat is small, and the pore structure is complex of tight reservoirs, so the fluid flow mechanism is different from the conventional sandstones. …”
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Classification and Disintegration Characteristics of the Carboniferous Rocks in Guangxi, China by Peng Mo, Junhui Luo, Decai Mi, Zhenchao Chang, Haifeng Huang, Tao Zhang, Guanhua Sun, Yan Li, Ling Zeng, Shihai Wang

“…Then, through indoor wet-dry cyclic disintegration test, the disintegration characteristics of the four types of rocks were studied. …”
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Fractal Statistical Study on the Strength of Jointed Rock Mass by Fangtao Li, Zhiping Hu, Xiang Ren, Jiakuan Ma, Xuexu An, Yunxin Zheng, Yonghui Zhang

“…The dip angle at which joint fissures are most prone to shear slip is given as π/4 + φ/2, where φ is the jointed rock mass strength parameter. …”
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Influence of Real-Time Heating on Mechanical Behaviours of Rocks by Bin Gu, Zhijun Wan, Yuan Zhang, Yangsheng Ma, Xiaodong Bernard Xu

“…The rock mechanical properties under the effect of high temperature present a great significance on underground rock engineering. …”
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Bearing characteristics and damage rules of regenerated rock mass by Ping Wang, Zilong Zeng, Yingming Li, Hongbo Liao, Jianhua Lv, Haijun Guo

“…A damage constitutive model incorporating the Weibull distribution and a damage correction coefficient is proposed to predict the mechanical strength of regenerative rock masses. Numerical simulations using Particle Flow Code 3D (PFC3D) reveal that enhanced mechanical properties of the cementing material lead to a shift from tensile to shear failure. …”
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Numerical Modeling of Rock Panels Subjected to Blast Loadings by Haijun Wang, Daiyu Xiong, Yun Duan, Weiqin Cao, Wenru Zhang, Peng Jiao, Bonan Wang, Xulin Zhao, Yonggang Miao, Le Zhou

“…Then, a total of 16 numerical simulations are carried out in which each type of rock panel is subjected to TNT blast loadings with four scaled distances, i.e., 0.15 m/kg1/3, 0.30 m/kg1/3, 0.60 m/kg1/3, 1.20 m/kg1/3. …”
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Physical and Mechanical Properties of Gypsum-Like Rock Materials by Sijiang Wei, Chongyang Wang, Yushun Yang, Meng Wang

“…In the process of tunnel construction, gypsum rock is often encountered, and the volume of gypsum rock expands when encountering water, which is easy to cause the occurrence of rock fall, collapse, and other disasters, bringing serious challenges to the safe construction of the tunnel. …”
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A Coupled Elastoplastic Damage Dynamic Model for Rock by Xuelong Hu, Ming Zhang, Xiangyang Zhang, Min Tu, Zhiqiang Yin, Haifeng Ma, Minke Duan

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The Frequency Dependence of Poisson’s Ratio in Fluid-Saturated Rocks by Liming Zhao, Tongjun Chen, Xin Zhang, Tao Xing

“…We investigated the frequency dependence of Poisson’s ratio ν in partially/fully fluid-saturated rocks. Based on one dominant fluid flow mechanism at each condition, we theoretically summarized that (1) when a rock is partially saturated or transits from drained state to undrained state at full saturation, ν increases monotonously with frequency, and the associated attenuation 1/Qν is positive with one peak. (2) When the rock transits from undrained state to unrelaxed state at full saturation, there are three cases: 1) ν increases monotonously with frequency and has positive 1/Qν with one peak, 2) ν keeps constant with frequency and has no attenuation, 3) and ν decreases monotonously with frequency and has negative 1/Qν with one peak. …”
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Parametric Study of the Borehole Drilling in Jointed Rock Mass by Yanan Gao, Yudong Zhang, Zetian Zhang, Minghui Li, Yingfeng Sun, Donghao Lan, Feng Gao

“…Hence, one of the most concerned problems is the stress redistribution of the coal and rock mass around the borehole. In practical engineering, there are many joints distributed in the coal and rock strata, so it is necessary to investigate the effect of the drilling in the jointed coal and rock mass. …”
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Orthogonal Analysis and Numerical Simulation of Rock Mechanics Parameters in Stress Field of Shaft Heading Face by Liyun Yang, Siyu Chen, Pengxiang Dong, Qingcheng Wang, Chen Huang

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Study on Zonal Cooperative Control Technology of Surrounding Rock of Super Large Section Soft Rock Chamber Group Connected by Deep Vertical Shaft by Shengrong Xie, Zaisheng Jiang, Dongdong Chen, En Wang

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Isotopic Age of the Xiong’er Group Volcanic Rocks and Its Geological Significance in Western Henan, China by Wenchao Dong, Xucheng Pang, Weixun Qu, Guangshun Hou

“…The Xiong’er Group is mainly distributed in western Henan, southern Shanxi, and southeastern Shaanxi. As a set of low-grade metamorphic and low-deformation volcanic rocks formed in the transition period during the tectonic evolution of the North China Craton in the Precambrian, the tectonic and magmatic evolution information of this period are well recorded. …”
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The Damage Induced by Blasting Excavation and Seepage Characteristics of Deep Rock under High Seepage Pressure by Qian Dong, Xin Liu, Hangli Gong, Yi Luo, Xinping Li, Liangjun Wang

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Numerical Simulation on Heat Recovery Efficiency of Different Working Fluids in High-Temperature Rock Mass by Xu Dong, Haozhe Geng, Guan Hao, Pan Li, Yi Teng, Wen Zhang

“…It is of great significance for the sustainable development of global energy to develop hot dry rock (HDR) geothermal resources by using enhanced geothermal system (EGS) technology. …”
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Stability Assessment of Dangerous Rock Mass of an Overhanging Slope in Puerdu Town, Southwestern China by Wen-Lian Liu, Jia-Xing Dong, Su-Gang Sui, Han-Hua Xu, Run-Xue Yang, Zhen-Luo Shen

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Assessment of the Excavation Damaged Zones in the Surrounding Rock of an Underground Powerhouse under High In Situ Stress Using an Acoustic Velocity Detecting Method by Liguo Zhang, Dong Wang, Jiaxing Dong

“…EDZs were qualitatively assessed based on the curve categories; in addition, we used a qualitative assessment method, which mainly involved an index of damage degree named D. The assessment results show that HDZ, but not SDZ, was significantly asymmetrically distributed in the upstream (average depth of 4.1 m) and downstream (average depth of 7.5 m) high sidewalls; in partial areas, depth of HDZ exceeded the length of designed rock bolts, which indicates that rock bolts cannot restrain crack development and EDZs evolution. …”
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Geochronology of the felsic rocks in Orijärvi, southern Finland – implications for stratigraphy by Elisa Toivanen, Teemu Vehkamäki, Markku Väisänen, Jaakko Kara, Hugh O’Brien

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Permeability Properties of Jointed Rock with Periodic Partially Filled Fractures by Fei Ye, Jun-Chao Duan, Wen-Xi Fu, Xing-Yu Yuan

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Study on Deformation and Permeation Properties of Gas-Containing Fractured Rock by Yushun Yang, Dongming Zhang, Shujian Li

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