在单个自由面爆炸下对岩石碎片化的数值研究,该爆炸是变量直径的脱电荷
Jiabing Lyu1, Tiejun Tao2, Caijin Xie3,4
1School of Civil Engineering, Guizhou University, Guiyang, 550025, China.
Scientific reports
|April 8, 2025
概括
可变直径脱的弹药通过增加底部的爆炸性质量来改善爆炸中的岩石碎片. 这种方法通过确保更好的岩石破碎,特别是在底部,提高了道挖掘效率.
科学领域:
- 地质技术工程 地质技术工程
- 爆炸物工程 爆炸物工程
- 岩石机械学 岩石机械学
背景情况:
- 在单个自由表面喷射中,常规的辐射无电荷导致底层岩石质量的碎片化不良.
- 这限制了道开采的整体爆炸效率和挖掘效率.
研究的目的:
- 为改善岩石碎片化提出和分析可变直径脱电荷的理论可行性.
- 为了比较可变直径脱电荷与辐射脱电荷的破石效率.
主要方法:
- 通过LS-DYNA模拟,建立并比较了可变直径和辐射脱电荷的单孔喷气模型.
- 分析了各种设计参数对可变直径脱电荷的岩石破碎效率的影响.
主要成果:
- 可变直径脱的弹药在底部提供了更大的爆炸性质量,增加了有效应力并改善了底层岩石的碎片化.
- 这些电荷通过应力波叠加和腔压力平衡来增强覆盖岩石的碎片化,即使爆炸物重量减少.
- 优化扩张部分的长度和半径显著改善了碎片化;减少收缩部分的半径的影响最小.
结论:
- 可变直径脱的电荷有效地解决了传统辐射电荷的碎片化限制.
- 确定了最佳设计参数,特别是扩展部分,用于在实际道应用中增强岩石碎片化.
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