Zobrazeno 1 - 10
of 71
pro vyhledávání: '"fully mechanized caving mining"'
Publikováno v:
Gong-kuang zidonghua, Vol 50, Iss 9, Pp 20-27 (2024)
This paper analyzes the current status and existing issues in the control technology of surrounding rock and intelligent top coal caving technology for thick and ultra-thick coal seams in fully mechanized caving faces. The study focuses on five aspec
Externí odkaz:
https://doaj.org/article/cdabbcdf4831421183fe2275ba57331b
Publikováno v:
矿业科学学报, Vol 8, Iss 2, Pp 180-189 (2023)
This paper investigated the multi-port caving technology to improve the top coal recovery and caving efficiency of the longwall top coal caving(LTCC)in extra-thick seams.The 3D drawing experiments are designed based on the actual geological condition
Externí odkaz:
https://doaj.org/article/60d2eb81899342049212d9a46bfaf76c
Publikováno v:
Meitan kexue jishu, Vol 51, Iss 2, Pp 83-94 (2023)
Affected by the superposition of working face mining, strong rock pressure phenomena such as rock burst and large deformation easily occur in the gob-side entry when mining extra-thick coal seams. Taking the extra-thick coal seam mining of Caojiatan
Externí odkaz:
https://doaj.org/article/b962ce57469d41adb667c68616742d2d
Autor:
CAO Shiyou, DONG Fangying, CHEN Dalin, ZHANG Lifeng, XU Debao, WANG Song, WANG Peng, YIN Huiyong, ZHENG Yongjie
Publikováno v:
Meikuang Anquan, Vol 53, Iss 3, Pp 236-242 (2022)
In order to accurately predict the development height of water-conducting fracture zone in the roof of fully mechanized caving coal of No.3 coal seam in Tengzhou Mining Area, based on the measured data of water-conducting fracture zone height and mai
Externí odkaz:
https://doaj.org/article/66f49108ebfe4dc7a81458f16e14328b
Publikováno v:
Frontiers in Earth Science, Vol 10 (2023)
Study of the pre-blast weakening of hard-top coal water injection is especially important to solve problems related to the low recovery rate of coal resources and frequent dynamic disasters due to the low degree of fragmentation of hard-top coal duri
Externí odkaz:
https://doaj.org/article/99589139c7a74d4496922ed9019bc0c9
Publikováno v:
Geomatics, Natural Hazards & Risk, Vol 12, Iss 1, Pp 2561-2589 (2021)
In fully mechanized caving mining, the earlier the top coal enters the limit-equilibrium zone, the easier it is for leakage to be induced in front of the support. As the dip angle of the seam increases, the leakage of the top coal in front of the sup
Externí odkaz:
https://doaj.org/article/527a3265efc24e0ca9fd2c6cbe5e5d1f
Autor:
LI Lin, GU Wei, LIU Shichao
Publikováno v:
Meikuang Anquan, Vol 51, Iss 11, Pp 94-100 (2020)
The research background is Shengtai Qingwa Coal Industry of Jinmei Group, which adopts narrow coal pillar for the first time to carry out goaf roadway excavation technology. The 2203 fully mechanized caving face was selected as the test area, by comb
Externí odkaz:
https://doaj.org/article/b4c76e03a9b24bdb9931931e89b16297
Publikováno v:
Meikuang Anquan, Vol 51, Iss 10, Pp 159-163 (2020)
This paper systematically summarizes the development process of fully mechanized top coal caving technology and equipment in Yankuang Group in recent 30 years. On the basis of the introduction test in China and supported by the national scientific re
Externí odkaz:
https://doaj.org/article/468351e180fd44e09f25b93d49374a80
Autor:
Liang Li, Qingxiang Huang, Xiao Zuo, Jie Wu, Baoning Wei, Yanpeng He, Weilong Zhang, Jie Zhang
Publikováno v:
Energies, Vol 15, Iss 21, p 8164 (2022)
Because of the problem of gangue discharge and surface subsidence during coal mining, the current research on underground filling mainly focuses on the paste filling, solid filling, and grouting filling of the overburden separation layer after scaffo
Externí odkaz:
https://doaj.org/article/60c6a4f741ec485687579e2570382447
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