AI Article Synopsis
- A study highlights how burnt rocks found in open-pit mines across Xinjiang, Inner Mongolia, and Ningxia significantly impact blasting effectiveness.
- Researchers use physical and chemical analysis along with numerical simulation software (ANSYS/LS-DYNA and PFC 2D) to create a model of burnt rocks featuring multiple joint cracks and irregularities.
- The findings indicate that fractures in burnt rock concentrate stress, reduce the effectiveness of stress waves, and absorb some blasting energy, leading to uneven stress and poor blasting outcomes.
Article Abstract
A large number of burnt rocks in some open-pit mines in Xinjiang, Inner Mongolia and Ningxia have a great influence on the blasting effect. For this kind of rock, through the analysis of physical and chemical changes, combined with ANSYS/LS-DYNA and PFC 2D numerical simulation software, a burnt rock model with multiple joint cracks and irregular distribution is constructed to simulate the blasting process of burnt rock under the combined action of stress wave and detonation gas. The results show that the fracture of rock mass affects the propagation of blasting cracks in the fracture area, resulting in stress concentration and stress hindrance. The action time of stress wave is reduced, and the energy of blasting gas is partially absorbed by the fracture, resulting in uneven stress on the burnt rock bench and seriously affecting the bench blasting effect.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10904868 | PMC |
| http://dx.doi.org/10.1038/s41598-024-55802-2 | DOI Listing |
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