Zobrazeno 1 - 10
of 5 690
pro vyhledávání: '"sinking"'
Autor:
Longhui Guo, Hua Cheng, Zhishu Yao, Chuanxin Rong, Guang Yang, Xiaoyun Wang, Yu Fang, Bao Xie
Publikováno v:
International Journal of Coal Science & Technology, Vol 11, Iss 1, Pp 1-20 (2024)
Abstract Combined with the advanced drilling of the central return air shaft in Kekegai Coal Mine, the distribution law of slag discharge flow field by drilling method and the influencing factors of slag discharge effect are studied. Firstly, the num
Externí odkaz:
https://doaj.org/article/8015d5d7708b409db88933379bdbd206
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-24 (2024)
Abstract To reveal the velocity distribution law of a gas lift reverse circulation well washing flow field in drilling shaft sinking, a velocity mathematical model of well washing flow field is established. The theoretical analytical solutions and ve
Externí odkaz:
https://doaj.org/article/0b42d1415fdb49ef8c87fff45be9779b
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-16 (2024)
Abstract Predicting and understanding the phenomenon of surface subsidence caused by coal mining in working faces with faults are important issues for safe coal mining and efficient production. In numerical simulation experiments, it was found that t
Externí odkaz:
https://doaj.org/article/600e504b0a264bfcab1516cbcd8cc182
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-22 (2024)
Abstract The mechanical rock-crushing efficiency is directly influenced by rock properties and joint structure. Tipped-hob is widely used in the construction of shafts. By analyzing the motion of tipped-hob and the mechanical properties of granite an
Externí odkaz:
https://doaj.org/article/d96dce6a5b034ed082f483a857821417
Autor:
Ina Benner, Uta Passow
Publikováno v:
Microplastics and Nanoplastics, Vol 4, Iss 1, Pp 1-7 (2024)
Abstract In contrast to expectations, even buoyant microplastics like polyethylene and polypropylene are found at high concentrations in deep sediment traps and deep-sea sediments. To explain the presence of such buoyant microplastic particles at gre
Externí odkaz:
https://doaj.org/article/112e93787db14e34aa3cd14e04cf80f9
Autor:
Chunchi Wu1
Publikováno v:
Journal of Financial & Quantitative Analysis. Sep93, Vol. 28 Issue 3, p399-416. 18p. 1 Diagram, 3 Charts.
Autor:
DYL, EDWARD A.1, JOEHNK, MICHAEL D.2
Publikováno v:
Journal of Finance (Wiley-Blackwell). Sep79, Vol. 34 Issue 4, p887-893. 7p.
Autor:
JEN, FRANK C.1, WERT, JAMES E.1
Publikováno v:
Journal of Finance (Wiley-Blackwell). Dec1966, Vol. 21 Issue 4, p697-713. 17p. 12 Graphs.
Autor:
WILSEY, H. LAWRENCE1
Publikováno v:
Journal of Finance (Wiley-Blackwell). Oct47, Vol. 2 Issue 2, p31-42. 12p.