Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Defu Zhu"'
Publikováno v:
Energy Science & Engineering, Vol 12, Iss 11, Pp 5200-5210 (2024)
Abstract The Longwall top coal caving (LTCC) technology is regarded as one of the most crucial approaches for exploiting thick coal seams. A crucial and effective approach for improving the recovery rate of top coal and reducing coal resource losses
Externí odkaz:
https://doaj.org/article/29f50212c6ef49acbf2442e1965887c3
Publikováno v:
Meitan xuebao, Vol 49, Iss 7, Pp 3038-3050 (2024)
The ultimate loading capacity of the pillar is closely related to the bauxite pillar size parameters, and scientific prediction of pillar strength is the key to safe and efficient mining by the airfield method. In order to accurately and efficiently
Externí odkaz:
https://doaj.org/article/169a68ea46264a7680a5dab66585dbf6
Autor:
Yujiang ZHANG, Wushuai HAO, Guorui FENG, Bingyuan CUI, Qian WANG, Yining WANG, Defu ZHU, Honghui YUAN, Xiangye WU
Publikováno v:
Meitan xuebao, Vol 49, Iss 5, Pp 2257-2269 (2024)
The borehole shear test is an important method to quickly measure the shear strength of rock in the field, but its application is limited due to its large measurement error. By analyzing the principle of borehole shear and the research results, it is
Externí odkaz:
https://doaj.org/article/ca876664aad946bf8d99d419ee74baf5
Autor:
Qiang Wang, Chenjun Hao, Wenchao Yao, Defu Zhu, Haifeng Lu, Long Li, Biao Ma, Bei Sun, Dongbo Xue, Weihui Zhang
Publikováno v:
BMC Gastroenterology, Vol 20, Iss 1, Pp 1-13 (2020)
Abstract Background The gut microbiota participates in the metabolism of substances and energy, promotes the development and maturation of the immune system, forms the mucosal barrier, and protects the host from pathogen attacks. Although the pathoge
Externí odkaz:
https://doaj.org/article/5e5c4cf05db84f558dba45bc464dc095
Publikováno v:
Energy Science & Engineering, Vol 8, Iss 2, Pp 340-352 (2020)
Abstract The mechanism and fracture aperture of thick hard roof failure were theoretically analyzed from the perspective of elastoplastic mechanics. A uniform load cantilever beam was established by considering the voussoir beam structure and stress
Externí odkaz:
https://doaj.org/article/7af6ff6a1b4443fb9d22bf1b021bed23
Publikováno v:
Energy Science & Engineering, Vol 8, Iss 1, Pp 89-103 (2020)
Abstract Stress concentration in partially caved goaf is the main cause of dynamic pressure accident in the lower seam mining. Aimed at the characteristics of caving in shallow partially caved goaf (PCG) and the specificity of interior load‐bearing
Externí odkaz:
https://doaj.org/article/46c3be63def7489586ca97b7881b8fcb
Autor:
Long Li, Qingxu Jing, Sen Yan, Xuxu Liu, Yuanyuan Sun, Defu Zhu, Dawei Wang, Chenjun Hao, Dongbo Xue
Publikováno v:
Frontiers in Physiology, Vol 12 (2021)
The human gastrointestinal tract represents a symbiotic bioreactor that can mediate the interaction of the human host. The deployment and integration of multi-omics technologies have depicted a more complete image of the functions performed by microb
Externí odkaz:
https://doaj.org/article/8880c987c2b14bc899295c2a52e14b68
Publikováno v:
International Journal of Mining Science and Technology, Vol 29, Iss 6, Pp 955-962 (2019)
In the practice of mining shallow buried ultra-close seams, support failure tends to occur during the process of longwall undermining beneath two layers of room mining goaf (TLRMG). In this paper, the factors causing support failure are summarized in
Externí odkaz:
https://doaj.org/article/d0049eb010444a73befabf2bfc3ec11a
Publikováno v:
Energies, Vol 15, Iss 6, p 2282 (2022)
The accurate prediction of surface subsidence is a significant foundation for the damage assessment of coal seam mining and ecological environment reclamation in loess donga. However, conventional models are very problematic, and the reliability of p
Externí odkaz:
https://doaj.org/article/ba13fce7814d4955a901e8097da2a241
Publikováno v:
Energies, Vol 14, Iss 1, p 219 (2021)
In longwall top coal caving (LTCC), the resource recovery ratio of the working face is directly determined by the top coal recovery ratio. An investigation of the evolution of top coal drawing characteristics and revealing the evolution of top coal d
Externí odkaz:
https://doaj.org/article/8df82ffd9c814c068fb8947ea1dce4cb