Failure Analysis of Deep Composite Roof Roadway and Support Optimization of Anchor Cable Parameters by Chen Li, Wenlong Zhang, Tianhong Huo, Rui Yu, Xidong Zhao, Ming Luo

“…The key points of stability of the roadway surrounding rock of soft rock composite laminated roof are obtained by theoretical analysis, i.e., improving the effective stress diffusion efficiency of the anchor cable through the reasonable arrangement of the anchor cable. …”
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Influence of Moisture Content on the Structural Characteristics of Argillaceous Weakly Consolidated Rock Caused by Dynamic Loading in the Coal Mine by Lingdong Meng, Lijun Han, Hexuan Zhu, Wenlong Dong, Wei Li

“…The argillaceous weakly consolidated rock is a kind of soft rock that will bring great difficulties in the construction process. …”
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Research on Anchor Cable and C-Shaped Tube Support Method in Deep Layers Roadway, Experimental Study, and Numerical Simulation by Renliang Shan, Shupeng Zhang, Shengchao Xiao, Junqi Liang

“…Results show that ACC and concrete spraying layer can form a stable extruded arch structure, so that the broken and soft rock within the loosen zone is in three-dimensional-stress state, effectively improving surrounding rock properties and controlling its deformation size. …”
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Quantitative Precursory Information of Weak Shocking Failures of Composite Soft Roof by Lihua Wang, Zenghui Zhao, Zhongxi Tian, Wei Sun

“…To reveal the mechanism of weak roof shocking in mine roadway arranged in weakly consolidated soft rock strata commonly observed in western China, a bearing system of composite roof composed of weakly consolidated soft rocks and coal layers was proposed. …”
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Determination of Shape Coefficient in Elastic Modulus Estimation with Penetration Test by Tongbin Zhao, Rui Mao, Kai Fang, Biwen Zhang, Fenghai Yu

“…The shape coefficient of hard rock is higher than that of soft rock. Shape coefficient should be selected reasonably according to the penetration depth in practical application, and the reason, furthermore, why back-calculated shape coefficient deviates from the theoretical value is also discussed.…”
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Seismic Responses and Damage Mechanisms of Deep-Buried Underground Powerhouse in Layered Rock Mass by Meng Zhao, Ming Xiao, Juntao Chen, Hancheng Jin

“…The seismic damage area of lining structure is mainly distributed in the place where the soft rock strata pass through and the upper structure with larger free surface. …”
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Study on Blasting Characteristics of Soft-Hard Rock Strata Based on Energy Fields and Particle Expansion Loading Algorithm by Jianbin Cui, Liangfu Xie, Yongjun Qin, Xuejun Liu, Wei Qiao, Zeyu Hu, Liming Wu, Liewang Qiu, Ke Huang

“…Then, the soft-hard composite strata are established, and the single-hole blasting experiments of composite strata, with different distribution thickness of soft rock stratum and hard rock stratum, are carried out. …”
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Analysis on the Difference of Energy Evolution in the Process of Energy Storage Failure of Strong Coal Rush Rock Samples under Different Adaptive Modification Regulation Measures by Fangfang Zhang

“…The results show that different modification regulation measures can effectively change the physical and mechanical parameters of target rock samples and realize “hard rock softening or soft rock hardening.” Samples under different modification measures are classified as initial consolidation stage, elastic stage, stage of plastic deformation, yield failure stage, and late stage, the energy evolution is roughly the same as the sample complete natural condition, but the yield failure stage and the destruction of late stage have an obvious difference, which provides favorable conditions for impact ground pressure to prevent. …”
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A Study on Excavation Characteristics of Tunnel with Upper-Soft Lower-Hard Stratum by Jun Feng, Hui-juan Yang, Yu Zhang

“…The bending moment of the lining produced by the positive benching method was far less than that of the other two methods. (3) Due to the difference in lithology, the stress of the tunnel lining in the thick upper “soft” and “hard” strata was mainly concentrated on the upper soft rock area, while the stress in the lower hard rock area was relatively small, and the lining stress value generated using the three excavation methods was relatively large. …”
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Analysis and Application of the Mechanical Properties of the Karst Collapse Column Fillings by Zhibin Lin, Boyang Zhang, Xiaofei Gong, Limin Sun, Wenzhen Wang, Dafang Yang, Yanlin Yang, Ming Guo, Xia-Hui Pan

“…The main results of the present study can be concluded concisely as follows. (1) The KCC fillings show obvious soft rock characteristics in the process of uniaxial compression and Brazilian split. …”
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Experimental Study on Characteristics of Seismic Damage and Damping Technology of Absorbing Joint of Tunnel Crossing Interface of Soft and Hard Rock by Dao-yuan Wang, Jin-xiu Yuan, Guang-yao Cui, Jia Liu, Hong-fan Wang

“…The following findings can be drawn. (1) The seismic damage of tunnel is mainly affected by stratum inertial force under the homogeneous stratum of soft rock. The seismic damage of tunnel is mainly caused by the forced displacement (the displacement difference between the two sides of interface of soft and hard rock), followed by stratum inertial force under the geological condition of interface between soft and hard rock. (2) The conventional type of absorbing joint (only the second lining is set with absorbing joint) is used in tunnel lining structure, and the damping ratios of principal tensile stress, bending moment, and axial force of lining are above 47.5%, 40.7%, and 72.7%, respectively. …”
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Strength and Cost Analysis of New Steel Sets as Roadway Support Project in Coal Mines by Qinghai Li, Renshu Yang, Jingkai Li, He Wang, Zhijie Wen

“…Roadway support in swelling soft rocks in coal mines has become a critical challenge in recent years. …”
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Improvement on the Key Element of Flexible U-Shaped Steel Support and Its Field Applications by Zhili Su, Shengguo Jing, Wenbing Xie, Qingteng Tang, Xingkai Wang

“…In China, there are a significant numbers of soft rocks roadways in underground coal mines. The roofs of these roadways are generally highly fractured, and traditional bolt installation does not provide sufficient supporting capacity. …”
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On the Experimental Determination of Poisson’s Ratio for Intact Rocks and Its Variation as Deformation Develops by Lu Dong, Hongfa Xu, Pengxian Fan, Zhichou Wu

“…The determination of Poisson’s ratio of soft rocks needs further investigation because Poisson’s ratio tends to exceed the theoretical limit in relatively low stress levels. …”
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