Zobrazeno 1 - 10
of 56
pro vyhledávání: '"Xianyang Qiu"'
Publikováno v:
Applied Sciences, Vol 14, Iss 16, p 7197 (2024)
In this study, the impact of principal stress states on the stress characteristics and initial failure of the rock mass surrounding a three-center arch opening was investigated using complex variable function methods and Discrete Element Method (DEM)
Externí odkaz:
https://doaj.org/article/81afdddfe457476d89190451d9cc95d2
Publikováno v:
Geomechanics and Geophysics for Geo-Energy and Geo-Resources, Vol 9, Iss 1, Pp 1-22 (2023)
Abstract Cut blasting, in which new surfaces and relief space for subsequent blasting are created, is one of the most critical steps in the establishment of large-diameter long-hole (LDL) stopes. To reduce the damage to the chamber roof caused by ste
Externí odkaz:
https://doaj.org/article/02790a7848a44957966cf5b62675a7b0
Publikováno v:
Journal of Rock Mechanics and Geotechnical Engineering, Vol 15, Iss 3, Pp 600-617 (2023)
Surface ground motion produced by underground blasts is significantly influenced by near-surface geological conditions. However, near-surface low-propagation velocity layers were always ignored in past analyses of ground motions due to their thin thi
Externí odkaz:
https://doaj.org/article/ffa24f65e72c469490deec3913a0a921
Publikováno v:
Minerals, Vol 14, Iss 3, p 238 (2024)
The high reactivity of the acetylene group enables the formation of strong chemical bonds with active sites on mineral surfaces, thereby improving the flotation performance of gold minerals. This study utilized density functional theory (DFT) to anal
Externí odkaz:
https://doaj.org/article/f60b12342b4f4d92a8b3227f585f24c9
Publikováno v:
Frontiers in Earth Science, Vol 9 (2022)
This study aims to investigate the fracturing characteristics of double-hole blasting under the action of coupled static stress and delayed time explosion. A total of thirteen explosive tests were carried out on rectangular concrete blocks with diffe
Externí odkaz:
https://doaj.org/article/1bb2bf45cd1d43809ccc63136853d9b3
Publikováno v:
Applied Sciences, Vol 11, Iss 11, p 4992 (2021)
A 3D numerical model was presented to investigate the blast-induced damage characteristics of highly stressed rock mass. The RHT (Riedel, Hiermaier, and Thoma) model in LS-DYNA was used to simulate the blast-induced damage and its parameters were cal
Externí odkaz:
https://doaj.org/article/62088e8eb906473ca7684d854c263855
Publikováno v:
Shock and Vibration, Vol 2019 (2019)
It is essential to control the damage to the surrounding rock and engineering structures in the process of cut blasting with a single free surface in underground mining. To reduce vibration induced by cut blasting, this paper proposes short-delay cut
Externí odkaz:
https://doaj.org/article/0f66a41560964ae0b1315d425118837e
Publikováno v:
Applied Sciences, Vol 10, Iss 4, p 1403 (2020)
Most mines choose the drilling and blasting method which has the characteristics of being a cheap and efficient method to fragment rock mass, but blast-induced ground vibration damages the surrounding rock mass and structure and is a drawback. To pre
Externí odkaz:
https://doaj.org/article/e8e35ebff2b640f990fa34a570b16b2d
Experimental Study on the Blasting Performance of Water-Soil Composite Stemming in Underground Mines
Publikováno v:
Advances in Materials Science and Engineering, Vol 2018 (2018)
Top stemming is necessary to stop the explosive energy from escaping through the upper part of blast-holes in cutting blasts of large-diameter deep-hole blasting in underground mines. The often-used single soil stemming frequently leads to material c
Externí odkaz:
https://doaj.org/article/f821373d196c4a15ae8d56fbf30f7879
Publikováno v:
PLoS ONE, Vol 13, Iss 9, p e0204166 (2018)
It is generally believed that stress wave superposition does occur and plays an important role in cutting blasting with a single free surface, in which explosive columns of several blast holes with short spacing are simultaneously initiated. However,
Externí odkaz:
https://doaj.org/article/72ccc6c4e58547fead02aef25ea383cb