摘要
为了研究某露天煤矿高陡并段边坡稳定性,结合工程实际,利用FlAC^(3D)数值模拟和Geoslope极限平衡分析理论,探究了某露天矿东帮高陡边坡的变形失稳机理和稳定性,并提出灾害防控对策。结果表明:变形破坏区主要集中在松散层及并段的砂泥岩互层高台阶,受车辆及爆破震动影响,变形破坏模式为单台阶或并段台阶沿不良结构面朝向临空面发生圆弧或楔形体滑动,滑动形式多表现为局部片帮、崩塌破坏。边坡整体稳定,并段高台阶存在局部崩塌可能,通过削坡、压脚可有效控制边坡安全。
In order to study the stability and control countermeasures of the high and steep slope in an open-pit coal mine,combined with the engineering practice,the article explores deformation instability mechanism and stability of the high and steep slope on the east slope of an open-pit coal mine by using Flac^(3D) numerical simulation and Geo-slope limit equilibrium analysis theory,and proposes the disaster prevention and control countermeasures.The results show that the deformation and damage areas are mainly concentrated in the loose layer and the high steps of sand mudstone interbedding in the merging section.Affected by vehicles and blasting vibration,the deformation and damage mode is that the single step or the merging step slides along the bad structural plane towards the free face in the form of arc or wedge,and the sliding mode is mainly manifested as partial slope and collapse damage.The slope is stable as a whole,and there is a possibility of local collapse of high benches at the same section.The slope safety can be effectively controlled by cutting slopes and pressing feet.
作者
郭占华
刘鹏
GUO Zhanhua;LIU Peng(Heidaigou Open-pit Coal Mine,China Energy Group Zhunge'er Energy Co.,Ltd.,Ordos 010300,China)
出处
《露天采矿技术》
CAS
2023年第5期24-27,31,共5页
Opencast Mining Technology
关键词
边坡稳定性
灾害防控
削坡
变形破坏机理
并段高台阶
slope stability
disaster prevention and control
slope cutting
deformation failure mechanism
merging high step
