关于深度采矿道路中煤柱保持的实践研究
Lei Wang1, Gang Liu2, Pingyun Ma2
1School of Mining Engineering, Heilongjiang University of Science and Technology, Harbin, 150022, China. 15765589177@126.com.
Scientific reports
|November 11, 2024
概括
这项研究确定了深度退缩采矿的最佳煤柱尺寸为7-8米,提高了道路稳定性并减少了安全危险. 实地测试证实,一个8米长的柱子有效地控制了应力和变形.
科学领域:
- 采矿工程 采矿工程 采矿工程
- 岩石力学 岩石力学 岩石力学
- 地质技术工程 地质技术工程
背景情况:
- 传统的煤柱设计方法对于深度退缩采矿是不够的.
- 深度采矿在道路稳定性和安全性方面带来了挑战.
- 优化煤柱尺寸对于高效和安全的煤炭开采至关重要.
研究的目的:
- 为了确定深度撤退采矿中煤柱的最终平衡尺寸.
- 分析压力转移和周围岩石塑料演变在不同的柱子大小下.
- 为平煤矿和类似的采矿区的煤柱设计提供实际指导.
主要方法:
- 机械实验 机械实验 机械实验
- 理论上的计算理论上的计算.
- 数字模拟的数字模拟.
- 实地测试 实地测试 实地测试
- 在平煤矿的工程应用.
主要成果:
- 最终的平衡煤柱尺寸被确定为7.12-8.22米.
- 煤柱尺寸在3-6米之间导致应力度和塑料失效.
- 7-8米的柱子显示出最佳的应力分布和屋顶控制.
- 9-10米的柱子在轴承性能上没有进一步的改善.
- 平安煤矿的一座8米长的柱子导致了27.54MPa的峰值应力和理想的变形.
结论:
- 对于深度退缩采矿而言,最佳的煤柱尺寸为7-8米.
- 这种尺寸范围提高了道路的稳定性,并最大限度地减少了煤炭的损失.
- 这些发现为可持续的煤炭开采业务提供了理论和实践指导.
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