| 蓄水条件下抚顺西露天矿边坡变形失稳与涌浪强烈程度分析 |
| |
| 关键词:Fushun west open-pit open pit mine impoundment slope stability deformation and failure impulse wave numerical simulation |
| 基金项目:中国地质调查局地质调查项目“辽东山地丘陵区典型地区地质灾害精细调查与风险管控”(编号: DD20230437)；沈阳市中青年科技创新人才支持计划项目“多源地学数据驱动的多层次区域地壳稳定性研究”(编号: RC220450)；沈阳地调中心主任基金项目“基于多场耦合技术的辽东山地丘陵区典型露天矿边坡变形演化机制现场监测研究”(编号: SJ202302) |
|
| 摘要点击次数: 434 |
| 全文下载次数: 90 |
| 摘要: |
| Analysis of Deformation, Instability, and Intensity of the Secondary Impulse Wave of Slope in the Fushun West Open-pit Mine under Water Storage Conditions |
| Accurate identification of potential mining geological hazards is essential as a precursor to comprehensive treatment of the geological environments in mining areas. The Fushun west open-pit mine may face restoration of water impoundment and lake formation after stopping mining. In this study, geological surveys, geotechnical tests, and numerical simulations were conducted. The occurrence location, deformation and failure characteristics, and intensity of the secondary impulse waves of potential slope geological disaster underwater storage conditions were analyzed. Additionally, optimization suggestions for filling and storage engineering were proposed by comparing the stability of key slopes under various backfill conditions. The results indicate that backfilling to –150 m followed by water storage to –50 m in the mine pit, in the softening of mudstone and shale, along with the activation of faults, leading to an overall sliding-subsidence deformation of the north slope. About 133.42×104 m3 of rock mass in the lower middle part of the northern slope became unstable and failed, forming a large-scale traction-type cutting-layer rocky landslide. The sliding mass entered the water, causing an impulse wave. The maximum impulse wave height in the lake was 11.8 m, and the maximum wave height was 15.3 m along the coast. Therefore, the local unstable north slope, the impounding lake, and its extension within 11.6– 30.6 m are categorized as an extremely high-intensity zone of landslide and surge disasters. By comparison, adjusting the height of the pit fill to –100 m and by water storage to –50 m can effectively meet both geological safety (F>1.3) and economic feasibility for mine rehabilitation. This study provides valuable insights for mitigating geological disaster risks, restoration, and treatment of geological environments in mining areas. |
| WU Jihuan,LI Xuguang,ZHANG Yanfei,MA Tianyu,SHI Shaoshan,ZANG Yanqing,ZOU Jun.2025.Analysis of Deformation, Instability, and Intensity of the Secondary Impulse Wave of Slope in the Fushun West Open-pit Mine under Water Storage Conditions[J].Acta Geoscientica Sinica,46(2):419-428. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
|
|