盘州市鸡母滑坡发育特征及稳定性分析评价

Development characteristics and stability evaluation of Jimu Landslide in Panzhou City

采矿诱发的地质灾害隐患因其危害大、影响深等特征而不可被忽视。以遥感、机载雷达、无人机调查、地面调查、工程地质勘查等手段,对存在复发可能的盘州市盘关镇鸡母滑坡进行研究。文章描述了鸡母滑坡发育特征并运用Geostudio软件选取折线滑动法(传递系数法)进行稳定性分析评价,得出该滑坡为因人类采矿工程引起的中型土质滑坡,由松散覆盖层和较软弱顺层基覆界面组成,滑坡变形范围较大。目前处于基本稳定状态,在降雨、加载、扰动等不利条件下存在再次启动的可能,建议做好后缘裂缝位置和两侧排水工程,继续保持监测,如有必要,前缘设置挡土墙或抗滑桩进行治理。

The geological disasters caused by mining cannot be ignored because of their great harm and deep influence.By means of remote sensing,airborne radar,UAV investigation,ground survey and engineering geological exploration,this paper describes the development characteristics of Jimu Landslide and uses the broken line sliding method(transfer coefficient method) in Geostudio software to evaluate its stability.It is concluded that the landslide is a medium-sized soil landslide caused by mining,which is composed of loose covering layer and relatively weak bedding interface,with a large deformation range.The landslide is now in a basically stable state,and there is a possibility of restarting under adverse conditions such as rainfall,loading and disturbance.It is recommended to strengthen the drainage work at the rear edge cracks and on both sides,and maintain monitoring.If necessary,retaining walls and anti-slide piles should be set at the front edge.