Zobrazeno 1 - 10
of 65
pro vyhledávání: '"upward mining"'
Publikováno v:
Applied Sciences, Vol 14, Iss 22, p 10278 (2024)
The safety and efficiency of underground coal mining are threatened by thick hard roofs characterized by large overhang areas, problematic spontaneous caving, and high dynamic load upon their breakage. In this study, a mechanical model of the bearing
Externí odkaz:
https://doaj.org/article/85694244dcbb4afcb69cd9abaef50be2
Publikováno v:
Case Studies in Thermal Engineering, Vol 52, Iss , Pp 103733- (2023)
During upward mining in coal mines, the gas in the lower goaf can flow to the upper goaf along the through fractures between the coal seams, which affects the distribution of the flow field such as the oxygen concentration and the gas concentration i
Externí odkaz:
https://doaj.org/article/b1196077e9734192b304777bd49bc7bc
Akademický článek
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Akademický článek
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Akademický článek
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Autor:
Huayang Dai, Peng Li, Nurpeissova Marzhan, Yueguan Yan, Chongliang Yuan, Tursbekov Serik, Junting Guo, Yryszhan Zhakypbek, Konbay Seituly
Publikováno v:
International Journal of Mining Science and Technology, Vol 32, Iss 1, Pp 103-112 (2022)
Ultra-thick steep coal seam mining will inevitably lead to the increase of greater and violent ground subsidence and deformation. A subsidence control method by inversely-inclined slicing and upward mining is proposed in this paper. By this method, t
Externí odkaz:
https://doaj.org/article/bde99e516a2b469c9a8a196703c1ae67
Autor:
Yujiang Zhang, Yining Wang, Bingyuan Cui, Guorui Feng, Shuai Zhang, Chunwang Zhang, Zhengjun Zhang
Publikováno v:
Energies, Vol 16, Iss 20, p 7190 (2023)
China is endowed with a large quantity of residual coal resources that require upward mining. The stability of interburden strata structures and accurate determination are crucial for safe mining. Therefore, we established a mechanical model of distu
Externí odkaz:
https://doaj.org/article/c0c41e8b1e6e40a9af173756cb142c0a
Publikováno v:
Gong-kuang zidonghua, Vol 47, Iss 3, Pp 89-94 (2021)
The overburden movement law of the upward fully mechanized working face is different from that of the horizontal working face. The roof collapses frequently, which brings a great test to the stability of the working face support. The existing researc
Externí odkaz:
https://doaj.org/article/7da514519af94d639d78b2bfc1b2bc41
Autor:
YANG Chuangqian, FENG Guorui
Publikováno v:
Meikuang Anquan, Vol 51, Iss 5, Pp 56-60 (2020)
Aiming at the problem of safe upward mining of the wedge pillar mining area in Datong Mining Area, the stress distribution and plastic zone of the coal pillar before and during the upward mining were analyzed with UDEC numerical simulation software.
Externí odkaz:
https://doaj.org/article/4ef203f82d704d22867979048d6a3d03
Publikováno v:
Gong-kuang zidonghua, Vol 48, Iss 3, Pp 32-39, 54 (2022)
In order to optimize the continuous mining scheme of coal seam group in Yushuling Coal Mine, FLAC3D simulation is used to study the coal seam integrity and working face stress distribution law under two continuous mining schemes of downward mining an
Externí odkaz:
https://doaj.org/article/e3c2abe32cd848b695bd1ae959df9157