Zobrazeno 1 - 10
of 4 424
pro vyhledávání: '"spalling"'
Autor:
Wang, Kai1 (AUTHOR), Sun, Qiaoru1 (AUTHOR), Yang, Haotian2 (AUTHOR), Jiao, Xingjian1 (AUTHOR), Wang, Xinyong1 (AUTHOR), Li, Junping1 (AUTHOR), Xu, Liang1 (AUTHOR), Zhao, Guolong2 (AUTHOR) zhaogl@nuaa.edu.cn
Publikováno v:
International Journal of Advanced Manufacturing Technology. Aug2024, Vol. 133 Issue 11/12, p5485-5500. 16p.
Autor:
Wang Hongwei, Feng Li, Zhao Zhouyan, Li Yanjun, Cao Peipei, Jiao Jianqiang, Jiang Baolin, Liu Yong
Publikováno v:
Energy Science & Engineering, Vol 12, Iss 11, Pp 5105-5118 (2024)
Abstract In mining, the roof structure of a working face with a large mining height in a shallow‐buried coal seam is prone to cutting instability in front of the support, which causes support crushing and coal‐wall spalling. This study analyzes 2
Externí odkaz:
https://doaj.org/article/96eda438a8884ddcb1978bb38f6e387b
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-17 (2024)
Abstract The stability of coal pillars in fault areas is crucial for ensuring the safe passage of working faces. Based on field observations, frequent coal pillar spalling and substantial tectonic coal crumbs leakage, as well as tilting of hydraulic
Externí odkaz:
https://doaj.org/article/8937adc1c6b2434ba7e1cec7764aedee
Publikováno v:
Energy Science & Engineering, Vol 12, Iss 9, Pp 3599-3613 (2024)
Abstract To address the issues of coal rib instability and high occurrence of roof falls in high extraction height fully mechanized coal mining of soft coal seams, this study comprehensively employs theoretical analysis, numerical calculations, and f
Externí odkaz:
https://doaj.org/article/5928bafcd402436192f4d8a11d072b99
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-18 (2024)
Abstract Continuously reinforced concrete pavement (CRCP), crucial for the resilience of transportation infrastructure owing to its continuous steel reinforcement, confronts a critical challenge in the form of spalling—a distress phenomenon posing
Externí odkaz:
https://doaj.org/article/d52bee5ec700437abcfd0d4bcd41fb14
Publikováno v:
Underground Space, Vol 19, Iss , Pp 153-168 (2024)
Rockburst has always been a challenge for the safe construction of deep underground engineering. This study investigated the rockburst characteristics in highly-stressed D-shape tunnels under impact loads from rock blasting and other mining-related d
Externí odkaz:
https://doaj.org/article/a520aa80c5a64021ad85385ace7683b3
Publikováno v:
Meitan kexue jishu, Vol 52, Iss 7, Pp 1-10 (2024)
In order to predict rib spalling depth in fully-mechanized mining faces, taking the coal wall as the research object, the coal wall is regarded as a tri-linear strain softening material. Then the direct roof and main roof are taken as macro roof, and
Externí odkaz:
https://doaj.org/article/b6ca0332593640efab89afcf0d5723ac
Publikováno v:
Developments in the Built Environment, Vol 19, Iss , Pp 100523- (2024)
Ultra-high-performance concrete (UHPC) emerged as a promising material for modern construction, offering unparalleled strength, durability, and versatility. However, there is limited research regarding UHPC's response to fire, prompting urgent invest
Externí odkaz:
https://doaj.org/article/b4c53d2d1c734105ac9f49b2bb17971c
Publikováno v:
International Journal of Mining Science and Technology, Vol 34, Iss 5, Pp 713-729 (2024)
The Voronoi grain-based breakable block model (VGBBM) based on the combined finite-discrete element method (FDEM) was proposed to explicitly characterize the failure mechanism and predict the deformation behavior of hard-rock mine pillars. The influe
Externí odkaz:
https://doaj.org/article/7bff1ef162a74ed2a1b0d82cdad03f1a
Publikováno v:
International Journal of Mining Science and Technology, Vol 34, Iss 4, Pp 427-442 (2024)
In order to improve rib stability, failure criteria and instability mode of a thick coal seam with inter-band rock layer are analysed in this study. A three-dimensional mechanical model is established for the rib by considering the rock layer. A safe
Externí odkaz:
https://doaj.org/article/b4c2853fecf84f6690f79970c093edb2