Search Results - "Niu, Leilei"

Influence of Dynamic Disturbance on the Creep of Sandstone: An Experimental Study by Zhu, Wancheng, Li, Shaohua, Li, Shuai, Niu, Leilei

“…Dynamic disturbance such as blasting may significantly affect the creep of rock. Quantification of the influence of dynamic disturbance on the creep behavior…”
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Experimental and numerical evaluation on debonding of fully grouted rockbolt under pull-out loading by Yu, Shuisheng, Zhu, Wancheng, Niu, Leilei

“…The axial loading in rockbolts changes due to stress redistribution and rheology in the country rock mass. Such a change may lead to debonding at rockbolt to…”
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Experimental study on creep of double-rock samples disturbed by dynamic impact by Li, Shuai, Zhu, Wancheng, Niu, Leilei, Guan, Kai, Xu, Tao

“…During underground mining, rock deformation may be time-dependent and is reflected in rheological behavior. These changes may be also accelerated by dynamic…”
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Calculation for tensile strength and fracture toughness of granite with three kinds of grain sizes using three-point-bending test by Yu, Miao, Wei, Chenhui, Niu, Leilei, Li, Shaohua, Yu, Yongjun

“…Tensile strength and fracture toughness, important parameters of the rock for engineering applications are difficult to measure. Thus this paper selected three…”
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A finite strain numerical procedure for a circular tunnel in strain-softening rock mass with large deformation by Guan, Kai, Zhu, Wancheng, Wei, Jiong, Liu, Xige, Niu, Leilei, Wang, Xinrong

“…The reliable prediction of excavation responses for squeezing rock remains a challenging issue in rock engineering. This paper presents a numerical procedure…”
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Experimental and numerical analysis of fully grouted long rockbolt load-transfer behavior by Yu, Shuisheng, Zhu, Wancheng, Niu, Leilei, Zhou, Shichang, Kang, Penghui

“…As a simple supporting structure, rockbolts are responsible for maintaining the integrity and stability as well as controlling the deformation, displacement,…”
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Spalling of a one-dimensional viscoelastic bar induced by stress wave propagation by Niu, Leilei, Zhu, Wancheng, Li, Shuai, Liu, Xige

“…As a stress wave propagates in rock, the amplitude of the stress wave will attenuate, and the waveform will dissipate, which can be equivalently characterized…”
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Re-profiling of a squeezing tunnel considering the post-peak behavior of rock mass by Guan, Kai, Zhu, Wancheng, Liu, Xige, Wei, Jiong, Niu, Leilei

“…In problems involving large deformation, one of main concerns in rock engineering is the occurrence of a heavily reduction in tunnel section and even shield…”
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The sliding instability of rock roof block induced by vertical dynamic disturbance: An experimental study by Dai, Feng, Zhu, Wancheng, Niu, Leilei, Hou, Chen, Yu, Yongjun, Guan, Kai

“…The dynamic disturbance is one of the major reasons to trigger rock block sliding along the discontinuities of roof rock mass during the mining excavation. A…”
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Dynamic characteristics of compound rotor system of mechanically rectified permanent magnet generator by LIU Xin, XUE Zhiwei, ZHANG Yuting, NIU Leilei

“…The compound rotor system of a mechanically rectified permanent magnet generator is the key structure to realize the rectification function. The dynamics of…”
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Experimental and Numerical Studies on Bond Quality of Fully Grouted Rockbolt under Confining Pressure and Pull-Out Load by Yu, Shuisheng, Niu, Leilei, Chen, Jin

“…In mining engineering, the in situ stress changes with the stress induced by the surrounding mining activities. It positively or negatively affects the…”
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Correction: The hMLH1 -93G>A Polymorphism and Risk of Ovarian Cancer in the Chinese Population by Niu, Leilei, Li, Shumin, Liang, Huamao, Li, Hua

“…[This corrects the article DOI: 10.1371/journal.pone.0135822.]…”
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Determining the Viscosity Coefficient for Viscoelastic Wave Propagation in Rock Bars by Niu, Leilei, Zhu, Wancheng, Li, Shaohua, Guan, Kai

“…Rocks with microdefects exhibit viscoelastic behavior during stress wave propagation. The viscosity coefficient of the wave can be used to characterize the…”
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Numerical and theoretical study of load transfer behavior during cascading pillar failure by Hangyu Dong, Wancheng Zhu, Leilei Niu, Chen Hou, Xige Liu

“…To further study the load transfer mechanism of roof–multi-pillar–floor system during cascading pillar failure (CPF), numerical simulation and theoretical…”
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Profiling single-guide RNA specificity reveals a mismatch sensitive core sequence by Zheng, Ting, Hou, Yingzi, Zhang, Pingjing, Zhang, Zhenxi, Xu, Ying, Zhang, Letian, Niu, Leilei, Yang, Yi, Liang, Da, Yi, Fan, Peng, Wei, Feng, Wenjian, Yang, Ying, Chen, Jianxin, Zhu, York Yuanyuan, Zhang, Li-He, Du, Quan

“…Targeting specificity is an essential issue in the development of CRISPR-Cas technology. Using a luciferase activation assay, off-target cleavage activity of…”
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Sliding behaviors of the trapezoidal roof rock block under a lateral dynamic disturbance by Feng Dai, Wancheng Zhu, Min Ren, Shunchuan Wu, Leilei Niu

“…The surrounding rock of underground space is always affected by external dynamic disturbance from the side position, such as blasting vibration from a stope at…”
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The hMLH1 -93G>A Polymorphism and Risk of Ovarian Cancer in the Chinese Population by Niu, Leilei, Li, Shumin, Liang, Huamao, Li, Hua

“…As a mismatch repair (MMR) gene, hMLH1 plays an important role in the maintenance of chromosomal integrity. Several studies have investigated the associations…”
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Numerical simulation on excavation-induced damage of rock under quasi-static unloading and dynamic disturbance by Niu, Leilei, Zhu, Wancheng, Cheng, Zhen, Guan, Kai, Qin, Tao

“…During the excavation of underground opening, the rock may experience a complex loading path that includes the highly confined compression before excavation,…”
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Study on Bond Defect Detection in Grouted Rock Bolt Systems under Pullout Loads by Yu, Shuisheng, Niu, Leilei, Chen, Jin, Wang, Yawei, Yang, Honghao

“…In grouted rock bolt systems, bond defects often occur, which seriously affects the safety of rock mass structures. Therefore, in this study, based on the…”
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Experimental and Numerical Study on Stress Relaxation of Sandstones Disturbed by Dynamic Loading by Zhu, Wancheng, Li, Shuai, Niu, Leilei, Liu, Kai, Xu, Tao

“…Time-dependent rheological deformation of rocks affects the stability of underground stopes or constructions. It may also be altered by dynamic disturbances,…”
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