Zobrazeno 1 - 10
of 451
pro vyhledávání: '"gas control"'
Autor:
Chun Zhang, Xianju Qian
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-15 (2024)
Abstract In order to address the issue of gas over limit in the upper corner of the working face of the 9# coal seam in Wuhushan Mine, a series of theoretical and numerical simulation analyses were conducted to evaluate the optimal configuration for
Externí odkaz:
https://doaj.org/article/0ede3328ad41411fa40a0a3b17e56ae2
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-21 (2024)
Abstract In order to clarify the microscopic dynamics mechanism of CH4, CO2 and H2O adsorption and diffusion in coal, and to reveal the mechanism of the influence of different temperatures and pressures on the adsorption and diffusion characteristics
Externí odkaz:
https://doaj.org/article/b7ff6fe1ae824b598e9541ab05107676
Publikováno v:
Meikuang Anquan, Vol 55, Iss 10, Pp 236-243 (2024)
The automation degree of sealing technology in coal mine is insufficient, and the automatic directional drilling rig can improve the automation degree of sealing. A colloidal slip with double friction force for automatic directional drilling machine
Externí odkaz:
https://doaj.org/article/b907e92348de436b9f30926f1e8bbe73
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-10 (2024)
Abstract To investigate the dispersion process of the underground toxic gas carbon monoxide (CO) into the refuge chamber during a mine disaster and enhance the survival rate of trapped miners, a simplified model of an underground refuge chamber and t
Externí odkaz:
https://doaj.org/article/f05dd51aea624ae6b1744a85a79b3e81
Autor:
Zhiming YAN, Xinsheng ZHANG, Junsheng ZHANG, Baige YANG, Yunxing CAO, Shumin LI, Runping DONG
Publikováno v:
Meitan kexue jishu, Vol 52, Iss 8, Pp 63-73 (2024)
Coal mine disasters caused by coal and gas outbursts are severe in China. Currently, static and dynamic technologies are mainly used to address the difficult gas control problem. The gas control mechanism of the composite technology of cavity making
Externí odkaz:
https://doaj.org/article/e25db2ca03214e2591530ad8e4b5ecfd
Autor:
XIE Jun
Publikováno v:
矿业科学学报, Vol 9, Iss 4, Pp 529-537 (2024)
The large quarry face with a strike length of 3 300 m in Sijiazhuang Mine features high gas reserve, large gas outflow and its upper corner is easy to exceed the limit.This study adopts the gas management technology of extracting the gas from the coa
Externí odkaz:
https://doaj.org/article/104abd40c5924106a1be001dbd09ef41
Publikováno v:
Gong-kuang zidonghua, Vol 50, Iss 6, Pp 16-22 (2024)
The existing sealing methods for goaf along gob-side entry retaining mainly focus on building sealing walls and sealing wall cracks. The construction period is long and repeated, which consumes a lot of labor costs, has a low degree of automation, an
Externí odkaz:
https://doaj.org/article/2569dc494e5043cea855b23982d030f5
Autor:
Bo WANG, Enke HOU, Liang MA, Siqing SUN, Xinfeng DU, Jianchao YANG, Zhengxi WANG, Yuanwei SHAN
Publikováno v:
Meitan kexue jishu, Vol 52, Iss 5, Pp 114-126 (2024)
To address the issue of low gas extraction efficiency in driving roadway of broken soft and low permeability coal seams in Huainan mining area, a model of segmented cluster fracturing gas management in horizontal wells at the roof of coal seams was p
Externí odkaz:
https://doaj.org/article/4a3ebb8545334072a91d223186458a2e
Publikováno v:
Meitan kexue jishu, Vol 52, Iss 4, Pp 155-163 (2024)
Huainan mining area is a typical high-gas area, with broken soft coal seam, low permeability, high gas content, and difficulty in extraction. In order to probe into the technical feasibility and gas control effect of the horizontal well for segmental
Externí odkaz:
https://doaj.org/article/2258d8d61af44176a8f9d709e2e8077e
Publikováno v:
Egyptian Journal of Anaesthesia, Vol 39, Iss 1, Pp 329-334 (2023)
ABSTRACTBackground The aim of the study was to evaluate the effect of automatic gas control (AGC) on sevoflurane gas monitoring, safety, and recovery of patients during pancreatico-duodenectomy operation.Methods Forty patients scheduled for the pancr
Externí odkaz:
https://doaj.org/article/e134cdf8b8934c368bf3560f9bd44961