某矿山滑坡稳定性分析及治理措施

Stability Analysis and Treatment Measures of a Mine Landslide

【目的】充分了解矿区滑坡形成机理,科学分析评估滑坡稳定性,提高滑坡治理效果,确保矿区周边施工及运营安全。【方法】依托于贵州省1∶10 000地质灾害+风险斜坡精细化调查示范项目,以贵州省某镇矿区滑坡治理为实践,针对滑坡产生机理、滑坡稳定性及工程对策展开综合探究。通过观察滑坡裂缝、地表变形及周围岩石特征,分析滑坡体的基本特征和滑坡的成因机制。【结果】调查发现,在降雨影响下,滑坡软弱面部分产生泥化夹层,使抗剪强度急剧降低,同时开挖在坡体前缘卸载,多种因素导致滑动变形加剧,最终产生滑坡。【结论】通过滑坡稳定性计算,研究了滑坡体在不同工况下的稳定性,并针对不稳定区域提出了滑坡治理措施,可为同类型滑坡治理工程提供参考。

[Purposes]This paper aims to fully understand the formation mechanism of landslide in mining area,scientifically analyze and evaluate the stability of landslide,improve the effect of landslide treatment,and ensure the safety of construction and operation around the mining area.[Methods]Based on the 1∶10000 geological disaster+risk slope fine survey demonstration project in Guizhou Province,the landslide control in a mining area of a town in Guizhou Province was taken as a practice.The mechanism of landslide,landslide stability and engineering countermeasures are comprehensively explored,and the characteristics of landslide cracks,surface deformation and surrounding rock are observed.The basic characteristics of the landslide and the formation mechanism of the landslide are analyzed.[Findings]The survey found that under the influence of rainfall,the weak surface of the landslide produced a muddy interlayer,which sharply reduced the shear strength.At the same time,the excavation was unloaded at the leading edge of the slope,and various factors led to the aggravation of sliding deformation,which eventually led to the landslide.[Conclusions]Through the calculation of landslide stability,the stability of landslide under different working conditions is studied,and the landslide prevention and control measures are put forward for the unstable area,which provides reference for the same type of landslide treatment project.