Zobrazeno 1 - 10
of 357
pro vyhledávání: '"Qiu Liming"'
Autor:
HE Xueqiu, WEI Menghan, SONG Dazhao, LI Zhenlei, QIU Liming, HE Shengquan, MAJID Khan, WANG Anhu
Publikováno v:
Meitan kexue jishu, Vol 51, Iss 1, Pp 168-190 (2023)
As an important basic energy and industrial raw material in China, the safe mining of coal is the key to ensuring the national energy security and supporting the stable development of economy and society. With the gradual depletion of shallow coal re
Externí odkaz:
https://doaj.org/article/9b7b97559ffd46a489c7bc78319854c2
Publikováno v:
Gong-kuang zidonghua, Vol 48, Iss 5, Pp 72-78 (2022)
Compared with the energy dissipation of coal and rock failure, the more intuitive stress drop has certain practical significance for assisting the study of coal and rock failure characteristics and variation law of geophysical signals. And the stress
Externí odkaz:
https://doaj.org/article/7bc81c0c64954d1885136061f72e09de
Publikováno v:
Gong-kuang zidonghua, Vol 48, Iss 3, Pp 40-46 (2022)
In order to solve the problem of difficult prevention and control of coal and gas outburst in thin coal seam, the distribution characteristics of effective extraction area in thin coal seam are analyzed. Due to the limitation of the thickness of the
Externí odkaz:
https://doaj.org/article/5eadc039550c4be69f03551ba3e7f35b
Publikováno v:
Meikuang Anquan, Vol 52, Iss 11, Pp 63-68 (2021)
In order to explore the rule of the duration of the acoustic electric signal when the coal sample is damaged by loading, the full waveform synchronous acquisition of the acoustic electric signal during the uniaxial loading failure process of the coal
Externí odkaz:
https://doaj.org/article/00aa35f14ccb4fcfa10f19b84c4382b2
Publikováno v:
Gong-kuang zidonghua, Vol 47, Iss 2, Pp 63-69 (2021)
In order to solve the problem that there are few researches on the acoustic emission characteristics in the process of coal rock expansion and fracture, experiments on coal rock expansion and fracture are carried out to analyze the change law of stra
Externí odkaz:
https://doaj.org/article/45143c07a5ad43d89831dabe477465a6
Publikováno v:
Gong-kuang zidonghua, Vol 46, Iss 6, Pp 87-91 (2020)
The analysis of time-domain characteristics of acoustic emission (AE) and electromagnetic radiation (EMR) signals in process of rock failure under load mostly draws qualitative conclusions from amplitude, ringing count, energy and other parameters, w
Externí odkaz:
https://doaj.org/article/207e4eaed7c54fa0a7ff6dfe7d84bb0d
Publikováno v:
Gong-kuang zidonghua, Vol 44, Iss 6, Pp 80-86 (2018)
Influence of concentration, particle size and ignition energy of coal dust on secondary explosion characteristic of coal dust were studied by use of 20 L spherical explosion device, and the secondary explosion characteristic of coal dust was compared
Externí odkaz:
https://doaj.org/article/57aa47273a8c4ea38cb97babda07a9ae
Publikováno v:
Gong-kuang zidonghua, Vol 44, Iss 1, Pp 17-21 (2018)
For the demand of automation and accuracy of coal and gas outburst early warning, a remote intelligent monitoring and warning system for coal and gas outburst was developed. The system constitution was introduced as well as key technologies including
Externí odkaz:
https://doaj.org/article/ad842f2b47824da3a91b4d736181aee3
Publikováno v:
Gong-kuang zidonghua, Vol 43, Iss 6, Pp 37-41 (2017)
In order to research the problem that mining underlying No.8 coal seam can alleviate strong strata behavior during mining No.3 coal seam or not, a far distance lower protective seam mining scheme was simulated by use of FLAC3D software, and stress pe
Externí odkaz:
https://doaj.org/article/90da146d0c9a49ee8455936e33440c3b
Publikováno v:
Gong-kuang zidonghua, Vol 43, Iss 1, Pp 38-42 (2017)
Surface potential of coal rock during water-inrush process was tested through a simulated experiment system for surface potential of coal rock, and variation rule of the surface potential of coal rock during water-inrush process was researched. Follo
Externí odkaz:
https://doaj.org/article/f800a81f64f1458cae5e6aadeb2973a9