Results 231 to 240 of about 249,833 (291)

FDEM simulation of rock damage evolution induced by contour blasting in the bench of tunnel at deep depth

, 2020
One highly effective approach for tunnelling in rock at deep depth is blasting. The damage and in-situ stress redistribution in the surrounding rock mass induced by the blast loading during this process is, however, unavoidable. In this study, a powerful
Haoyu Han, D. Fukuda, Hong-yuan Liu, E. F. Salmi, E. Sellers, Ting-jin Liu, A. Chan   +6 more
semanticscholar   +1 more source

Numerical investigation on the stress evolution and failure behavior for deep roadway under blasting disturbance

, 2020
Numerical models of a deep and inverted-U-shaped roadway were established by a particle flow code (PFC2D), and four numerical tests were performed with different blasting locations.
J. Qiu, Diyuan Li, Xibing Li, Quanqi Zhu
semanticscholar   +1 more source

Blast-Furnace Melting Blast Control

2019 IEEE Russian Workshop on Power Engineering and Automation of Metallurgy Industry: Research & Practice (PEAMI), 2019
The paper suggests an approach to the blast-furnace melting control for improving the blast furnace process efficiency. The approach is based on the simulation of the blast furnace operation and online stabilization of parameters based on the obtained mathematical models.
T.A Barbasova, E.V Zagoskina
openaire   +1 more source

The relationship between strain energy, rock damage, fragmentation, and throw in rock blasting

Rock Fragmentation by Blasting, 2020
Design of cast blasting rounds and optimization of the blasting process has taken on a new and much greater importance with the emergence of overburden casting operations involving thousands of tons of explosives in each blast.
P. Persson
semanticscholar   +1 more source

Blasting Abrasive Blasting Myths

CoatingsPro, 2011
Can premature coatings failures be avoided by following a simple mathematical formula?
openaire   +1 more source

Optimization of spherical cartridge blasting mode in one-step raise excavation using pre-split blasting

, 2020
In one-step raise excavation, spherical cartridge blasting mode is easy to be implemented due to minimal requirement of the hole-deviation. Nevertheless, it may induce cumulative damage to the country rock. This study firstly uses a validated rock model (
Kai Liu, Kai Liu, Kai Liu, Qiyue Li, Chengqing Wu, Chengqing Wu, Xibing Li, Jun Li   +7 more
semanticscholar   +1 more source

Numerical simulation of rock mass blasting using particle flow code and particle expansion loading algorithm

Simulation modelling practice and theory, 2020
Numerical simulation of limestone rock mass blasting was carried out using the two-dimensional particle flow code (PFC2D) within the discrete element modeling framework, and the explosion load was loaded using the particle expansion algorithm.
Zehua Zhang, Wenle Gao, Kun-yang Li, Baojie Li   +3 more
semanticscholar   +1 more source

Effects of in-situ stresses on the fracturing of rock by blasting

Computers and geotechnics, 2017
Blasting is widely applied in deep rock excavation. The effect of in-situ stresses on the fracturing of rock due to blasting was investigated.
Changping Yi, D. Johansson, J. Greberg
semanticscholar   +1 more source

Reduction of tunnel blasting induced ground vibrations using advanced electronic detonators

, 2020
Blasting has been widely used for economical and rapid rock excavation in civil and mining engineering but has great loads, such as vibrations and noises, on the surrounding environment in the case of urban areas near dwellings and important structures ...
K. Iwano, K. Hashiba, J. Nagae, K. Fukui
semanticscholar   +1 more source

Research progress of the fundamental theory and technology of rock blasting

International Journal of Minerals, Metallurgy, and Materials, 2022
P. Xu, Ren-shu Yang, Jinjing Zuo, Chenxi Ding, Cheng Chen, Yang Guo, Shizheng Fang, Yufei Zhang   +7 more
semanticscholar   +1 more source