多方法联合监测研究关于岩底沟下浅层采矿层的表层行为
Jing Chai1,2, Zhe Ma3, Dingding Zhang3,4
1School of Energy, Xi'an University of Science and Technology, Xi'an, 710054, China. chaij@xust.edu.cn.
Scientific reports
|September 15, 2023
概括
在阿尔卑斯山峡谷地区的浅层煤层采矿导致强烈的过载变形. 下层关键层显著影响屋顶重量和岩石行为,对于安全的采矿设计至关重要.
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
- 岩石力学 岩石力学 岩石力学
背景情况:
- 拜吉古煤矿的高山峡谷地形为浅层煤层采矿带来了独特的挑战.
- 双重关键层被峡谷交叉,影响过度负担的行为.
研究的目的:
- 为了研究岩石的行为,在浅煤层采矿期间,在基石峡谷下挖掘.
- 分析采矿阶段对超负荷变形和屋顶加重的影响.
主要方法:
- 在实验室中建立了一个二维物理相似性模型.
- 纤维布拉格格网 (FBG) 传感系统,数字图像相关性 (DIC) 和压力传感器用于监测.
- 精确监测了应变,变形和压力场.
主要成果:
- 在峡谷下的采矿导致了强烈的超负荷变形和表面沉降盆地.
- 远离峡谷的开采导致下层关键层的周期性变形和失效.
- 记录了各种强度和压力度系数的屋顶加重事件.
结论:
- 下层关键层在屋顶加重的周期性和强度上起着至关重要的作用.
- 在山顶条件下和峡谷附近的采矿显示出严重的屋顶重量和斜坡不稳定性.
- 这些发现为优化在类似地质条件下的采矿设计提供了参考,以提高安全性和效率.
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