%0 Journal Article
%A LIANG  Rui
%A QI  Fang-xia
%A ZHOU  Wen-hai
%A LI  Sheng-rong
%A LOU  Xiao-ming
%T Blasting Characteristics of Eccentric Uncoupled Charges under Different Damage Models
%D 2024
%R 10.11988/ckyyb.20230666
%J Journal of Yangtze River Scientific Research Institute
%P 98-105
%V 41
%N 9
%X <p id="p00010">In practical blasting engineering, the charge often assumes an eccentric and uncoupled position relative to the blast hole due to its own weight. This charge arrangement results in a non-uniform distribution of blasting load on the surrounding rock mass, leading to variations in explosion energy and damage patterns near the blast hole. Single-hole rock blasting structure was numerically simulated by using the HJC model and RHT model to investigate the blasting dynamic response and damage characteristics of eccentric uncoupled charge under different constitutive models. Results reveal that, in the simulation environment in this study, concentric uncoupled charges cause uniform damage around the hole. However, the damage range predicted by the RHT model is nearly twice that predicted by the HJC model. As the eccentricity coefficient increases, the HJC model shows greater damage on the coupled side of the hole, while the RHT model exhibits an uneven distribution of damage between the coupled and uncoupled sides of the borehole. In conclusion, the RHT model more accurately describes rock crack propagation in actual blasting scenarios.</p>
%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20230666