Zobrazeno 1 - 10
of 82
pro vyhledávání: '"Leilei Niu"'
Publikováno v:
Journal of Rock Mechanics and Geotechnical Engineering, Vol 16, Iss 8, Pp 3014-3033 (2024)
To further study the load transfer mechanism of roof–multi-pillar–floor system during cascading pillar failure (CPF), numerical simulation and theoretical analysis were carried out to study the three CPF modes according to the previous experiment
Externí odkaz:
https://doaj.org/article/0922884055fd43d09992c9afaf1aebe2
Publikováno v:
Journal of Rock Mechanics and Geotechnical Engineering, Vol 16, Iss 3, Pp 741-760 (2024)
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 the same level or seismic waves from adjacent strata. A series of laboratory tests, numeri
Externí odkaz:
https://doaj.org/article/be0ad76856b840809c6cb4e2b1c689da
Publikováno v:
工程科学学报, Vol 45, Iss 9, Pp 1425-1440 (2023)
Roof caving has been the main threat to the safety of underground mining, in which the caving of roof rock blocks is particularly concerning. The secondary structural planes of surrounding rocks around underground excavations, such as roadways and st
Externí odkaz:
https://doaj.org/article/6ba85c4d4d7d4ebe9e8cca9f41971e77
Publikováno v:
Underground Space, Vol 10, Iss , Pp 269-293 (2023)
With the excavation of underground opening, the roof rock block may fall under external dynamic disturbance. In this paper, the roof rock mass was simplified as a rock block system composed of trapezoidal rock blocks. A series of experiments and nume
Externí odkaz:
https://doaj.org/article/d86ecaeda57743ffa6d57bdf8d7575d0
Publikováno v:
International Journal of Coal Science & Technology, Vol 9, Iss 1, Pp 1-15 (2022)
Abstract 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 grout interface or rupture of the rockbolt. In this study, based on laboratory expe
Externí odkaz:
https://doaj.org/article/32aac8b5ea984a59ab5ed944deb90278
Publikováno v:
Shock and Vibration, Vol 2022 (2022)
In mining engineering, the in situ stress changes with the stress induced by the surrounding mining activities. It positively or negatively affects the propagation of ultrasonic guided waves in rockbolts. Therefore, the effect of in situ stress in ro
Externí odkaz:
https://doaj.org/article/7c176e27675c4c268422b54266fa739e
Publikováno v:
Advances in Materials Science and Engineering, Vol 2022 (2022)
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 existence of bond defects, laboratory tests were conducted to detect the location and length of
Externí odkaz:
https://doaj.org/article/e4d33e1378944943aeff9371ae972027
Publikováno v:
PLoS ONE, Vol 14, Iss 5, p e0218032 (2019)
[This corrects the article DOI: 10.1371/journal.pone.0135822.].
Externí odkaz:
https://doaj.org/article/a395a41d92054da69c778395af20f7d2
Autor:
Jie Lei, Yingchun Miao, Yu Lan, Xiuxiu Han, Hongbo Liu, Yi Gan, Leilei Niu, Yanyan Wang, Zhifu Zheng
Publikováno v:
Frontiers in Plant Science, Vol 9 (2018)
The initial step in glycerolipid biosynthesis, especially in diverse allopolyploid crop species, is poorly understood, mainly due to the lack of an effective and convenient method for functional characterization of genes encoding glycerol-3-phosphate
Externí odkaz:
https://doaj.org/article/736c86b079aa4ac8868a5034ffac1c56
Publikováno v:
PLoS ONE, Vol 13, Iss 3, p e0180880 (2018)
Tensile strength and fracture toughness, important parameters of the rock for engineering applications are difficult to measure. Thus this paper selected three kinds of granite samples (grain sizes = 1.01mm, 2.12mm and 3mm), used the combined experim
Externí odkaz:
https://doaj.org/article/80a8d1fdb895415cbfac5e992d17abda