关于孤立岛屿面板道路布局和周围岩石控制的研究
Lei Shi1,2, Jiao Zhang3,4, Weiyong Lu5,6
1Department of Mining Engineering, Lyuliang University, Lvliang, 033001, Shanxi, China. cumtshilei@163.com.
Scientific reports
|November 10, 2023
概括
这项研究分析了在重新开采过程中孤立的岛屿煤柱的压力和故障. 数字模拟揭示了应力度和塑料区,为道路布局提供了信息,并支持了更安全的煤炭回收战略.
科学领域:
- 采矿工程 采矿工程 采矿工程
- 地质技术工程 地质技术工程
- 岩石机械学 岩石机械学
背景情况:
- 重新开采历史的煤炭资源带来了复杂的压力环境和周围岩石条件不佳.
- 历史矿山中孤立的岛屿煤柱面临着相当大的地面压力,使道路布局和安全复杂化.
- 了解压力和故障规律对于这些支柱的安全和有效恢复至关重要.
研究的目的:
- 调查孤立的岛屿煤柱边界的压力和故障特征.
- 分析形态对应力分布和故障区域的影响.
- 确定最佳的道路布局,并支持重新开采孤立岛屿煤柱的战略.
主要方法:
- 使用数值模拟来研究孤立的岛屿面板边界的应力和故障规律.
- 分析的重点是煤柱两侧分布的差异.
- 现场监测数据被用于验证拟议的道路布局和支持方法.
主要成果:
- 在高峰边界的峰值应力差异从0.18到4.51MPa不等,表现出受屋顶结构影响的周期性行为.
- 高压力集中在柱子的中心 (35-40MPa末端),原来的岩石应力区域转移到柱子末端.
- 在柱子末端确定了8-20米的塑料区域,指导道路布局和支设计.
结论:
- 该研究建立了基于应力和故障区域分析的道路布局,具有特定的柱子宽度和道路布局.
- 为高压路面提出了4区域支控制系统和钻井减压技术.
- 这些发现为孤立的岛屿煤柱回收作业中的道路布局和控制提供了宝贵的参考资料.
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