Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Qingxin Qi"'
Autor:
Haitao LI, Qingxin QI, Weisheng DU, Haikuan ZHANG, Guanyu YANG, Shouguang WANG, Xiaoshan SHI, Chunyuan LI, Chunyang CUI, Weiyu ZHENG, Jianwei ZHENG, Tuan HE, Wei ZHU
Publikováno v:
Meitan kexue jishu, Vol 52, Iss 9, Pp 150-161 (2024)
The observability of underground engineering, such as coal mining, is extremely limited, which makes it difficult to obtain reliable pre-analysis basis for many complex engineering problems. Especially in face of new engineering environment brought a
Externí odkaz:
https://doaj.org/article/3acc4ee76fdb42a7993afce705aef8a7
Publikováno v:
Meitan kexue jishu, Vol 52, Iss 3, Pp 74-86 (2024)
In order to study the influence of the primary bedding structure on wave velocity and mechanical properties of coal-rock mass, multilayer and multi-directional ultrasonic and CT scanning tests were carried out in laboratory. It also aims to improve t
Externí odkaz:
https://doaj.org/article/23a9ca6811dd40a7b8eec0d01e417bfd
Autor:
Liang ZHANG, Qingxin QI, Ting REN, Xiangchun LI, Ke GAO, Chunyuan LI, Xiaopeng LI, Honghui YUAN
Publikováno v:
Meitan kexue jishu, Vol 51, Iss S2, Pp 1-12 (2023)
Coal rock dynamic disasters such as rockburst and gas outbursts pose severe threats to the safe and efficient mining of coal mines in China; however, the mechanical mechanisms of those disasters are still unknown. Therefore, the evolution law and con
Externí odkaz:
https://doaj.org/article/6dd6f7286cd341d892ab467d586f06a5
Autor:
Qingxin QI, Shizhi MA, Xikui SUN, Shankun ZHAO, Yunpeng LI, Haitao LI, Bin YU, Pengzhi PAN, Shouguang WANG, Hong LI, Yizhe LI, Xudong WANG, Xiufeng ZHANG, Xuebin WANG, Hongyan LI, Caiping LU, Shuwen WANG, Jun HAN, Wenjun QIAO, Ningbo ZHANG
Publikováno v:
Meitan xuebao, Vol 48, Iss 5, Pp 1861-1874 (2023)
Although the safety in the production of the mines in China has improved, coal bursts pose a serious threat to coal mines, especially deep mining. There have been eight coal bursts accidents with forty-eight deaths in the past five years. These accid
Externí odkaz:
https://doaj.org/article/34eb230ebd0345f3a49ad8a14c8c8cd4
Publikováno v:
Lithosphere, Vol 2022, Iss Special 11 (2022)
AbstractThe prevention of rockbursts is significant to ensure mining safety in deep coal mines. The multifactor analysis and a new quantitative evaluation method for rockbursts in coal mines are proposed in this study. In the aspect of rockburst anal
Externí odkaz:
https://doaj.org/article/0a0d4dc8f2be472da88cea083b47c75d
Autor:
Yizhe Li, Shankun Zhao, Qingxin Qi, Pengzhi Pan, Xiangzhi Wei, Yin Wang, Ningbo Zhang, Yang Zhao, Haitao Chai, Qilin Hao
Publikováno v:
Advances in Civil Engineering, Vol 2021 (2021)
Coal bump often occurs in coal mining among many working faces in mine group under the control of large geological bodies. In order to study the coal bump mechanism between adjacent working faces under the conditions of large fault and huge thick ove
Externí odkaz:
https://doaj.org/article/ba4311d76a804cf9bd3954b322702e28
Publikováno v:
Shock and Vibration, Vol 2015 (2015)
The mechanism of preventing rockburst through deep-hole precracking blasting was studied based on experimental test, numerical simulation, and field testing. The study results indicate that the deep-hole precracking could change the bursting pronenes
Externí odkaz:
https://doaj.org/article/13d798fd7da34c68ac7b24d0089289ed
Publikováno v:
Shock and Vibration, Vol 2015 (2015)
Shallow depth coal seams are widely spread in Shendong mining area, which is located in the Northwestern region of China. When working face is advanced out of concentrated coal pillar in upper room and pillar goaf, strong strata behaviors often cause
Externí odkaz:
https://doaj.org/article/a413fc313881457188213c9bb095cee9
Autor:
Xiaojing Zhu1,2 (AUTHOR), Qingxin Qi1 (AUTHOR), Yonghui Xiao2 (AUTHOR) yonghui20062009@126.com
Publikováno v:
Science Progress. Oct-Dec2022, Vol. 105 Issue 4, p1-25. 25p. 2 Color Photographs, 1 Diagram, 6 Charts, 10 Graphs.
Publikováno v:
Journal of Geophysics and Engineering. 19:739-749
The classic RCD absorption circuit has been applied to shorten the turn-off time of transmitters. The current way to determine the resistor and capacitor values of the classic RCD circuit is inefficient. In this paper, an intelligent optimization met
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46f74bea63d90af9bc1272a23d746e93
https://doi.org/10.1093/jge/gxac047
https://doi.org/10.1093/jge/gxac047