Zobrazeno 1 - 10
of 218
pro vyhledávání: '"working surface"'
Publikováno v:
Gong-kuang zidonghua, Vol 50, Iss 8, Pp 61-68 (2024)
When the mining relationship between the upper coal seam working face and the lower coal seam roadway in the close distance coal seam changes, the deformation and instability mechanism of the surrounding rock of the roadway will be more complicated.
Externí odkaz:
https://doaj.org/article/aa9a8ebb1ea44eb4bc61cb21e77f37d6
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-22 (2024)
Abstract Double-layer island working face main roadway coal pillars are affected by complex mining stress superposition, when different coal pillar width combinations, the surrounding rock stress field will produce different degrees of regional loadi
Externí odkaz:
https://doaj.org/article/e139c2c7877545e0ab985004d476c404
Publikováno v:
Проблеми трибології, Vol 29, Iss 1/111, Pp 53-60 (2024)
The paper uses the principles of the system approach to establish the relationship between wear of individual surfaces on the example of a gear drive of the GP type pump. The hierarchical structure of the part is considered, its individual functional
Externí odkaz:
https://doaj.org/article/cfd311d2b28c42e1b4bdd52bce8641ba
Autor:
Guoqing WU, Yanlong MA
Publikováno v:
Meitan kexue jishu, Vol 51, Iss 5, Pp 149-160 (2023)
The transparency of mine geology is a new requirement for safe and efficient mining of coal mines. For working faces with complex geological conditions, channel wave detection technology is one of the commonly used geophysical prospecting methods. If
Externí odkaz:
https://doaj.org/article/2894eba44a3d4f9eb6048d2af3898572
Publikováno v:
IEEE Access, Vol 11, Pp 83867-83880 (2023)
Coal mine roof accidents pose a significant threat to the safety of personnel and equipment. To mitigate these risks, this study presents an improved time-series prediction model, called Nadam-LSTM, for mining pressure data at the working face in coa
Externí odkaz:
https://doaj.org/article/01ae6533c52944f0a4184c22fa4ae94d
Publikováno v:
E3S Web of Conferences, Vol 538, p 01005 (2024)
This article is about potato feather sorting machines. There are mechanical and automatic types of potato sorting machines. In turn, there are types of mechanical potato sorting machines in drum, conveyor, roller and sieve types. While automatic sort
Externí odkaz:
https://doaj.org/article/df2e04cabca54cf58ba9d7dcf96ac67a
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Publikováno v:
Meikuang Anquan, Vol 52, Iss 7, Pp 231-236 (2021)
The manufacturing technique of the top coal caving in coal mining of the upper and lower gateway in the working face is mainly along the coal seam bottom plate excavation. On the basis of the tunneling equipment used in the comprehensive tunneling fa
Externí odkaz:
https://doaj.org/article/34c5aa2e605a41f591182be660b3c9f3
Autor:
ZHANG Yuzhu
Publikováno v:
Meikuang Anquan, Vol 52, Iss 1, Pp 152-156 (2021)
In order to accurately determine the sensitive index and reasonable critical value of outburst prediction in the working face of outburst coal seam, taking 6# coal seam of Sijichun Coal Mine as an example, by summarizing the characteristics of coal a
Externí odkaz:
https://doaj.org/article/46632ad435b64f9ea3905429ee51f4c4