Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Dongzhuang Tian"'
Publikováno v:
Meitan kexue jishu, Vol 50, Iss 12, Pp 36-42 (2022)
In view of the limitations of directional drilling technology and equipment for underground gas drainage in coal mining areas, such as low degree of automation, low drilling ratio of target formation, slow drilling rate of rock formation, and small d
Externí odkaz:
https://doaj.org/article/8705217df7e840c6ad7eef7e66c0b938
Publikováno v:
Buildings, Vol 13, Iss 11, p 2770 (2023)
With the development of mud shield tunnel construction technology, the demands on the working performance of a mud pump are becoming higher and higher. As one of the critical components of a mud pump that is easy to wear, the performance of the pisto
Externí odkaz:
https://doaj.org/article/20cf706a446f414d9d47bc4f631f775f
Publikováno v:
Energy Reports, Vol 7, Iss , Pp 6690-6699 (2021)
In order to grasp the rock breaking mechanical characteristics of arc-shaped PDC bit, and guide the optimization design of bit structure, theoretical calculation models of cutting parameters of PDC cutters were established. Taking Φ94 mm tri-wing ar
Externí odkaz:
https://doaj.org/article/bb55106968a147a5bdfa3656e8816e19
Publikováno v:
Multimedia Tools and Applications.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::afd75c9778ca3bd00f4789c6674dded7
https://doi.org/10.1007/s11042-023-15294-0
https://doi.org/10.1007/s11042-023-15294-0
Publikováno v:
Energy Reports, Vol 7, Iss, Pp 6690-6699 (2021)
In order to grasp the rock breaking mechanical characteristics of arc-shaped PDC bit, and guide the optimization design of bit structure, theoretical calculation models of cutting parameters of PDC cutters were established. Taking Φ 94 mm tri-wing a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::387977eb56bf806a7dcc329c5cf54e3c
https://doi.org/10.1016/j.egyr.2021.09.148
https://doi.org/10.1016/j.egyr.2021.09.148
Publikováno v:
2022 5th World Conference on Mechanical Engineering and Intelligent Manufacturing (WCMEIM).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3def950fbdb2f2f085b0ce994b113c13
https://doi.org/10.1109/wcmeim56910.2022.10021541
https://doi.org/10.1109/wcmeim56910.2022.10021541
Publikováno v:
Volume: 36, Issue: 1 414-428
Gazi University Journal of Science
Gazi University Journal of Science
In order to analyze the rock disintegration characteristics of special-shaped Polycrystalline Diamond Compact (PDC) cutters, numerical simulation and micro-drilling test on four kinds of special-shaped PDC cutters are carried out. Simulation results
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee98cbd4de4a4d3c6f12fb3bac8cdf3e
https://dergipark.org.tr/tr/pub/gujs/issue/72243/927956
https://dergipark.org.tr/tr/pub/gujs/issue/72243/927956
Publikováno v:
Procedia Earth and Planetary Science. :17-22
The underground nearly-horizontal directional drilling technology and equipments, which are firstly developed by Xi’an Research Institute of China Coal Technology & Engineering Group from 2005, are the most advanced in the industry of mining. The d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::38375be2d325ef729716f1e65e47bf77