在面板采矿过程中,通过覆盖的剩余煤柱在路面上的偏差应力和不对称控制技术的进化定律
Chunyang Tian1,2, Qiucheng Ye3, Bohao Qi1
1School of Energy and Mining Engineering, China University of Mining and Technology-Beijing, Beijing, 100083, China.
Scientific reports
|February 23, 2024
概括
在"+"型布局的剩余煤柱下开采会引起显著的压力. 这项研究分析了压力和塑料区的演变,并制定了道路稳定性的分隔支持策略.
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:
- 具有"+"类布局的近距离煤层 (CDCS) 由于叠加的上方和下方煤柱的强烈矿井压力而带来挑战.
- 在这些特定的"+"类型布局中,关于在剩余煤柱 (RCP) 下挖矿的研究有限.
- 了解应力分布和岩石质量失效对于安全的采矿操作至关重要.
研究的目的:
- 在"+"型布局下,在剩余煤柱下开采时调查底层道路的机械行为.
- 分析道路周围偏差应力和塑料区的演变.
- 开发和验证复杂压力条件下的道路的分区支持策略.
主要方法:
- 使用现场测量和数值模拟来研究应力和变形.
- 在室内进行了测试,以了解岩石质量的特性.
- 工程应用和现场监测验证了拟议的支持技术.
主要成果:
- 在RCP下,偏差应力表现出双模分布,过渡到支柱中心以下的单个峰值.
- 最大塑料区域延伸到3.4米的屋顶和5米到底部道路的肋骨.
- 应力度区域随着采矿接近RCP,从圆形演变为半月形和状.
结论:
- 在RCP下方45米的区域根据干扰水平被分为三个区域.
- 提出并实施了一个分区不对称的联合控制技术方案,使用道钢结构缆和门类型支.
- 开发的分区支持技术有效地减轻了道路的不稳定性和故障,为类似的采矿场景提供了关键的技术支持.
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