摘要
为了阐释小龙潭露天矿北帮边坡的变形破坏机制,通过现场工程地质调查,选取3个典型剖面开展稳定性分析与防治措施研究。研究结果表明:北帮边坡处于滑坡初期弱变形阶段,属潜在大型推移式滑坡,剖面稳定系数介于1.041~1.085,整体呈欠稳定-基本稳定状态。进一步研究发现,边坡稳定性受地形地貌、岩土体性质、地质构造等多因素综合影响,其中地表水入渗与地下水渗流作用是诱发边坡变形的关键因素。提出盲沟+降水、降压漏斗措施(疏干井)、削坡减载210万m3并配套“土沟+防渗膜”防排水系统的治理方案,经计算验证,治理后天然工况下边坡最小稳定系数提升至1.159,地震工况下仍保持1.059。
In order to elucidate the deformation and failure mechanism of the north slope in Xiaolongtan Open-pit Mine and the influencing factors,this article conducts stability analysis and prevention measures research on three typical profiles through on-site engineering geological investigation.The research results indicate that the north slope is in the early stage of weak deformation of the landslide and belongs to a potential large-scale translational landslide.The stability coefficient of the profile ranges from 1.041~1.085,and the overall state is under stable to basically stable.Further research has found that the stability of slopes is influenced by multiple factors such as topography,soil properties,and geological structures.Among them,surface water infiltration and groundwater seepage are the key factors that induce slope deformation.A treatment plan is proposed for blind ditch+precipitation,pressure reducing funnel measures(dewatering wells),slope cutting and load reduction of 2.1 million m3,and supporting"soil ditch+anti-seepage membrane"waterproof and drainage system.After calculation and verification,the minimum stability coefficient of the slope is increased to 1.159 under natural conditions and remain at 1.059 under earthquake conditions.
作者
邵兴能
苏志强
朱洪
汪洪津
汪鸿剑
SHAO Xingneng;SU Zhiqiang;ZHU Hong;WANG Hongjin;WANG Hongjian(Yunnan Xiaolongtan Mining Bureau Co.,Ltd.,Honghe 661601,China)
出处
《露天采矿技术》
2025年第5期66-71,共6页
Opencast Mining Technology
关键词
变形特征
变形机理
边坡稳定性
边坡防治
防渗措施
deformation characteristic
deformation mechanism
slope stability
slope prevention
anti-seepage measure
