Zobrazeno 1 - 10
of 15 819
pro vyhledávání: '"energy release"'
Autor:
Sitao ZHU, Xiang ZHANG, Fuxing JIANG, Jupeng MA, Xiufeng ZHANG, Kaiwen XIA, Chao WANG, Shidong LI, Jinhai LIU, Quanjie ZHU, Xiaocheng QU
Publikováno v:
Meitan xuebao, Vol 49, Iss 9, Pp 3711-3727 (2024)
In view of the frequent occurrence of rockburst in the coal pillars of high-stress roadways in deep underground coal mines in China, the types and mechanisms of rockburst in coal pillars are studied by means of field investigation, theoretical analys
Externí odkaz:
https://doaj.org/article/fd60c694177e46f1a89983f8e42a6100
Publikováno v:
Meitan xuebao, Vol 49, Iss 9, Pp 3759-3780 (2024)
Rock burst disaster has become a major safety problem in underground coal mining worldwide. Using the true triaxial electro-hydraulic servo loading test system, the stress-strain law, failure characteristics and acoustic emission activity law of coal
Externí odkaz:
https://doaj.org/article/b6fecd291a5f4de78adef7c3260207db
Publikováno v:
Journal of Rock Mechanics and Geotechnical Engineering, Vol 16, Iss 9, Pp 3641-3660 (2024)
Micron-scale crack propagation in red-bed soft rocks under hydraulic action is a common cause of engineering disasters due to damage to the hard rock–soft rock–water interface. Previous studies have not provided a theoretical analysis of the leng
Externí odkaz:
https://doaj.org/article/032e2e41108d4b448fe03030df526edb
Publikováno v:
Geomechanics and Geophysics for Geo-Energy and Geo-Resources, Vol 10, Iss 1, Pp 1-15 (2024)
Abstract In this study, a discriminative model of fracture expansion through a composite reservoir interface was established. During fracture transformation, the model, based on the theory of energy release rate at the fracture tip, helps clarify the
Externí odkaz:
https://doaj.org/article/500382c3022041a38c3ca06fbce5fdea
Publikováno v:
Defence Technology, Vol 39, Iss , Pp 168-176 (2024)
Titanium hydride (TiH2), a promising high-energy additive, is doped into PTFE/Al to optimize the energy output structure of the reactive jet and strive for better aftereffect damage ability to the target. Six types of PTFE/Al/TiH2 reactive liners wit
Externí odkaz:
https://doaj.org/article/90715337415e4a2b8ef2687bc69ad06e
Publikováno v:
International Journal of Coal Science & Technology, Vol 11, Iss 1, Pp 1-9 (2024)
Abstract In order to study the mechanics, acoustic emission (AE) and electromagnetic emission (EME) response law of bursting liability coal at different loading rates, uniaxial compression tests were carried out on coal mass from Konggu Coal Mine. Th
Externí odkaz:
https://doaj.org/article/64ce2006a8c14d84ac6cac5b362683d1
Publikováno v:
Journal of Rock Mechanics and Geotechnical Engineering, Vol 16, Iss 7, Pp 2441-2465 (2024)
Accurate prediction of rockburst proneness is one of challenges for assessing the rockburst risk and selecting effective control measures. This study aims to assess rockburst proneness by considering the energy characteristics and qualitative informa
Externí odkaz:
https://doaj.org/article/ce586c76de6c4d63b4bc851ebd42bde9
Publikováno v:
Meitan kexue jishu, Vol 52, Iss 6, Pp 67-80 (2024)
In order to explore the energy evolution law and damage evolution characteristics of coal and rock mass in the process of deformation and failure under different water content, the uniaxial compression test of coal and rock mass in Shuangma No.1 Coal
Externí odkaz:
https://doaj.org/article/9e82345598c546289e84d664f0bcb29e
Autor:
Dongxiao ZHANG, Xiangyu WANG, Weiyao GUO, Yueying ZHANG, Tongbin ZHAO, Zhen WU, Hengyu FANG, Qian ZHANG
Publikováno v:
Meitan kexue jishu, Vol 52, Iss 6, Pp 40-50 (2024)
The variation of coal seam thickness is one of the important factors affecting the pressure relief of large-diameter drilling hole. We have established an elastic model of pressure relief of large-diameter drilling hole based on the principle of equi
Externí odkaz:
https://doaj.org/article/da7317df584e48aa8c072ceecbe5ccc7
Publikováno v:
Defence Technology, Vol 36, Iss , Pp 1-12 (2024)
A ternary system of PTFE/Al/Bi2O3 is constructed by incorporating PTFE-based reactive material and thermite for enhancing the energy release of the PTFE-based reactive material. The effects of Bi2O3 in the PTFE/Al/Bi2O3 on both mechanical properties
Externí odkaz:
https://doaj.org/article/fdb06cf82d18442b8fd3d8a936ecfd7a