Numerical study on blasting damage of rock with eccentric charge structure
Kaihua Liang, Hong Zhao, Yang Li, Weihui Pan, Fuwu Ma, Hai Rong, Nannan Li
TL;DR
This study uses simulations to compare how different charge structures affect rock damage during blasting, aiming to improve safety and efficiency in mining.
Contribution
The paper introduces a numerical analysis of eccentric charge structures and their impact on rock fragmentation and crack propagation.
Findings
Eccentric charges create higher stress on the coupled side, up to 2.29 times that on the uncoupled side.
Multi-charge layouts improve blasting effectiveness, with optimal configurations depending on the number of charges.
The influence of eccentric charges is limited, with stress fields converging to concentric patterns beyond a certain range.
Abstract
To enhance the safety and efficiency of blasting operations in mines, this study numerically investigates the influence of eccentric versus concentric decoupled charge structures on rock fragmentation under constant charge mass. Using ANSYS/LS-DYNA simulations, the distribution of effective stress (ES) and crack propagation patterns around a single borehole were analyzed. Damage evolution was quantitatively assessed through the damage area ratio (DAR) metric. The results indicate that eccentric charges induce an asymmetric stress field, with ES on the coupled side being up to 2.29 times higher than that on the uncoupled side, and promote vertically symmetrical crack propagation with higher crack density near the charge. The influence range of eccentric charging is limited. Beyond this range, the stress field converges to that produced by concentric charging. Compared to a single charge,…
Genes, proteins, chemicals, diseases, species, mutations and cell lines named across the full text — each resolved to its canonical identifier and authoritative record.
Click any figure to enlarge with its caption.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
Figure 16
Figure 17
Figure 18
Figure 19
Figure 20
Figure 21
Figure 22
Figure 23
Figure 24
Figure 25
Figure 26
Figure 27
Figure 28
Figure 29
Figure 30
Figure 31
Figure 32
Figure 33
Figure 34
Figure 35
Figure 36
Figure 37
Figure 38
Figure 39Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsRock Mechanics and Modeling · Structural Response to Dynamic Loads · High-Velocity Impact and Material Behavior