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用实验和数值方法优化爆破设计和长板几何结构,以提高开放式石灰石矿的稳定性和生产率
Geleta Warkisa Deressa1,2, Bhanwar Singh Choudhary1, Nagessa Zerihun Jilo3
1Department of Mining Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand, India.
Scientific reports
|February 17, 2025
概括
在开放式采矿中优化爆炸设计和长板几何学,提高了安全性和效率. 调整座椅高度和面部角度等参数显著影响斜坡稳定性和生产力,并提出了安全和高效操作的具体建议.
科学领域:
- 地质技术工程 地质技术工程
- 采矿工程 采矿工程 采矿工程
- 岩石机械学 岩石机械学
背景情况:
- 露天采矿业务需要持续优化,以确保安全,效率和可持续性.
- 板坡度稳定性是一个由爆炸设计和几何学影响的关键因素.
- 数字建模是评估这些影响在各种负载条件下的关键工具.
研究的目的:
- 检查爆破设计和板几何学对板坡度稳定性在露天采矿中的影响.
- 为了确定平衡稳定性和生产力的最佳参数.
- 评估爆炸动态及其对地面振动的影响.
主要方法:
- 使用数值建模来模拟静态和动态负载条件.
- 分析岩石质量数据,爆炸设计参数和地力学特性.
- 评估爆炸动态,包括速度减弱和爆炸引起的地面振动 (BIGV).
主要成果:
- 减少长椅高度和面角改善了剪切减少因子 (SRF),表明稳定性增加.
- 增加整体斜率角提高了生产率,但降低了SRF,显示了稳定性-生产率的权衡.
- 确定了最佳条件:7.5米的长高度,75°BFA,14米的长宽度,SRF值为1.31 (静态) 和1.16 (动态).
结论:
- 在长高度,面角和宽度的特定调整可以显著提高坡度稳定性和运营生产力.
- 爆炸动力学模拟提供了关于粒子运动减弱和地面振动的见解.
- 推的粉末系数 (0.31-0.51 kg/m3) 和峰值粒子速度 (PPV) 值 (30-40 cm/s) 确保了安全性,并优化了石灰岩采矿的爆炸设计.
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