摘要
随着露天采矿深度的提高以及矿坑边坡坡度的增大,矿坑的安全性问题越来越凸显,尤其是在地震下作用,矿坑边坡的稳定性更是人们关注的重点。在介绍Newmark理论和方法基本原理的基础上,应用改进的Newmark方法,以地震多发地带南美洲厄瓜多尔共和国的米拉多铜矿区为实例,在已知临界位移条件下,反推临界加速度和临界坡角,并探讨其与震中距以及震中距与位移、震中距与震级的变化规律,研究方法可用于地震滑坡的定量分析,为矿坑的开挖设计提供参考依据。
With increase of open mining depth and mine slope angle,the safety of the mines is in the highlight,especially under the earthquake effect,mine slope stability is the focus of attention.Based on Newmark theory and method,taking a earthquake frequently occurring area,the Ecuado＇s Mirador Copper Mine as an example and using the improved Newmark method,this paper derives the critical acceleration and critical slope unden given critical displacement and explores the relationship between acceleration/displacement/magnitude and epicentral distance.The method and results can be used to make quantitative analysis of seismic landslide and gire a reference to design of mine excavation.
出处
《世界地震工程》
CSCD
北大核心
2013年第4期147-152,共6页
World Earthquake Engineering
基金
中南大学中央高校基本科研业务费专项基金(No.2013zzts236)
