Zobrazeno 1 - 10
of 21 682
pro vyhledávání: '"a pillar"'
Autor:
O'Connor, Niall
Publikováno v:
Business Freedoms and Fundamental Rights in European Union Law.
Externí odkaz:
https://doi.org/10.1093/9780191982132.003.0011
Publikováno v:
Meikuang Anquan, Vol 55, Iss 12, Pp 188-196 (2024)
In order to solve the problem that the backfill body can not be connected to the roof in the process of end slope filling mining in open pit coal mine and to investigate the influence of filling rate on the deformation and failure characteristics of
Externí odkaz:
https://doaj.org/article/6c17ada064d84eeea6c07968a072d7ea
Publikováno v:
Meikuang Anquan, Vol 55, Iss 12, Pp 180-187 (2024)
The end wall mining technology has the advantages of no additional stripping, safety and stability, and no support, and has a good application prospect in the recovery of coal resources in the end wall of open pit mine. During the mining process, the
Externí odkaz:
https://doaj.org/article/6cedb55a7bca45418cc64ac963e0120f
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-16 (2024)
Abstract Deep close distance coal seam mining is affected by the goaf of upper coal and remaining coal pillar, and the roadway of lower coal is difficult to maintain stability. By means of theoretical analysis, physical simulation test and numerical
Externí odkaz:
https://doaj.org/article/0446aeb04c004000af8fc72524eac2fa
Publikováno v:
Energy Science & Engineering, Vol 12, Iss 11, Pp 4991-5007 (2024)
Abstract In the Shaanxi‐Inner Mongolia region, where most mines employ wide coal pillar retention and dual entry layout techniques, mining pressure manifestations frequently occur during working face retreatment, posing significant challenges to sa
Externí odkaz:
https://doaj.org/article/9716d1a1ae3942f4ac7b608ccd54c03c
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-19 (2024)
Abstract To address the limitations of traditional coal pillar design methods in engineering practice for deep retreat mining roadways, this research focuses on the retreat mining face at the Pinggang Coal Mine in Heilongjiang Province. Combining mec
Externí odkaz:
https://doaj.org/article/6d31589f74dd401684cdb57364d1c3a5
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-21 (2024)
Abstract In order to effectively control the large deformation of coal pillar and roadway during entry retained along gob side with small coal pillar, taking 1311 and 1312 working faces of a coal mine in Shanxi Province as engineering background, the
Externí odkaz:
https://doaj.org/article/21e6662a839641e6b8e7e28addeb6e7c
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-21 (2024)
Abstract To address coal pillar instability, the study focuses on the 3−1 coal seam coal pillar at Nanliang Coal Mine. It analyzes the bending deformation energy of the main roof and the pre-yield elastic energy of the coal pillar’s elastic zone
Externí odkaz:
https://doaj.org/article/272714c89aba436bae332288a40dc37e
Autor:
JinTao Wang, YiNi Chen, ZiWen Lv, XiaoYu Han, ZiHan Pan, Feng Tian, MingYuan Zhao, HongBo Xu, GaoLiang Peng, HongTao Chen, MingYu Li
Publikováno v:
Journal of Materials Research and Technology, Vol 33, Iss , Pp 7157-7168 (2024)
Copper pillar bumps are widely utilized in advanced packaging technologies, representing a crucial foundation for 3D packaging. However, the mechanical properties of Sn3Ag bumps on copper columns often fall short of meeting increasingly demanding ser
Externí odkaz:
https://doaj.org/article/eebf943c72cc410a8a180c46256ebbfe
Publikováno v:
Meikuang Anquan, Vol 55, Iss 11, Pp 146-153 (2024)
In the strip coal mining under buildings, railways and water-bodies and other retaining coal pillar mining methods, the long-term stability of coal pillar group is of paramount importance to the safe and efficient green mining. Based on the interacti
Externí odkaz:
https://doaj.org/article/d7a7b63b7ef949a58d2cba6dc7476c84