研究进化模式和对周围岩石的控制叠加应力场的研究 双层局部区域负载 岛面主道路
Dongdong Chen1, Zijian Li2, Zhifeng Zhang2
1School of Energy and Mining Engineering, China University of Mining and Technology-Beijing, Beijing, 100083, China. chendongbcg@cumtb.edu.cn.
Scientific reports
|August 7, 2024
概括
这项研究揭示了采矿压力如何影响双层工作面上的煤柱. 了解叠加加载增加法是防止道路故障和识别关键支持区域的关键.
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:
- 双层岛屿工作面的煤柱经历了复杂的叠加的采矿压力.
- 不同的煤柱宽度显著改变了周围的岩石应力场,导致区域负荷增加.
- 了解这些压力变化对于解释道路故障机制和确定关键控制区域至关重要.
研究的目的:
- 在双层岛屿工作面公路中研究周围岩石应力场的区域叠加加载增定律.
- 分析故障模式并确定不同煤柱宽度组合下的关键控制区域.
- 为道路稳定性制定有效的支持策略.
主要方法:
- 使用数值模拟来建模应力分布和演变.
- 在现场进行监测,以验证模拟结果并捕捉现实世界的条件.
- 进行了支柱压力,偏差应力和主要应力偏移的分析.
主要成果:
- 这项研究确定了一个叠加的负载增加定律,用于下层煤层的支柱压力和偏差应力 (下降→增加).
- 在前置工作面部区域的主要应力偏移模式的特征.
- 鉴定了三种发育形态和九种演变模式的偏差应力峰值区域 (圆形管 → 逆过高波体 → 过高波体).
结论:
- 根据煤柱宽度组合,确定了主要道路的关键强化区域.
- 为主轨道道路确定了40米的保护性煤柱宽度,为峰值偏差应力区域设置了反向超波体模式.
- 为不对称的关键区域制定了一个协同失效控制计划,并通过现场监测进行了验证,证明了其有效性.
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