刚果(金)地区长时效干湿循环下的露天采场滑坡机理研究

为了研究露天采场边坡在长时效干湿循环下的滑坡灾害产生原因和滑坡形成机理，以刚果(金)某露天采场滑坡为研究对象，分析了滑坡产生原因及形成机理。依据现场分析结果与相关规范，制定了多种滑坡治理方案，并通过极限平衡分析方法验证了治理方案的可行性。结果表明：1)岩石力学强度低、节理发育较强、岩石整体破碎等为滑坡形成内因；长时效干湿循环、采场爆破等为外因，在内因与外因综合作用下造成了坡体滑坡灾害。2)滑坡灾害形成主要有3个过程：坡体卸荷回弹变形-坡体蠕滑变形-节理剪切面拉裂-贯通。3)推荐采用坡面角45°削坡减载方法对并段后的垮塌滑坡处边坡进行治理。采用极限平衡分析验证了方案的可行性。研究结果为矿山边坡滑坡治理设计及施工提供了依据，并取得良好效果。

Study on mechanism of open-pit landslide under long-term wetting-drying cycle in Congo (DRC)

To study the causes of landslide disasters and the formation mechanism of open-pit stope slopes under long-term wetting-drying cycles, a landslide in an open-pit stope in Congo (DRC) was taken as the research object, and the causes and formation mechanisms of landslides were analyzed. According to the on-site analysis results and relevant specifications, a variety of landslide control schemes were formulated, and the feasibility of the control schemes was verified by the limit equilibrium analysis method. The research results show that: 1) Low rock mechanical strength, strong joint development, and overall rock fragmentation are the internal causes of landslides; long-term wetting-drying cycles, stope blasting, etc. are external causes. landslide disaster. 2) There are three main processes in the formation of landslide disasters: slope body unloading and rebound deformation - slope body creep deformation - joint shear plane cracking - penetration. 3) It is recommended that the slope angle of 45° be used for slope reduction and load reduction to control the slope at the collapsed landslide after merging. The feasibility of the scheme is verified by limit equilibrium analysis. The research results provide a basis for the design and construction of mine slope and landslide control and achieve good results.