Stability Analysis And Treatment Measures Of Large-scale Landslide In Xiding Ban-Bing Gold Mine,Menghai County,Yunnan Province

Landslide geological hazards caused by mining often pose a serious threat to the lives and property of surrounding villagers and workers in factories and mines.How to prevent the occurrence of mining landslides in mine development is an arduous task and a scientific problem to be solved urgently.Therefore,mine landslide research is an urgent need in mine construction and operation,which has important theoretical and practical significance.Based on the large-scale landslide treatment engineering of Ban-Bing Gold Mine in Xiding,Menghai County,Yunnan Province,the characteristics,stability and treatment scheme of the landslide in Ban-Bing Gold Mine are analyzed and studied in this paper.The main conclusions are as follows:?1?The large-scale landslide in Banbing Gold Mine consists of H₁ landslide and BW₁ unstable slope.The planar projection area of H1 landslide is 11*10⁴ m²and the square volume is 220*10⁴ m³.There are a lot of arc tension cracks on the back edge and side surface of H₁ landslide,which is a large-scale bedding rock landslide.The unstable slope of BW₁ has a quadrilateral plane with a horizontal projection area of 5.07*10⁴ m² and a square volume of 50.7*10⁴ m³.It is medium-sized and has potential weak sliding surface.When H₁ slides,the front edge of the slope has the possibility of transforming into a landslide,and poses a threat to the life and property of the villagers in Bulan xi ding village on the back edge of the slope.?2?According to the geological conditions of H₁ landslide and BW₁ unstable slope,the stability of the above-mentioned slope is calculated by transfer coefficient method and numerical simulation method,and compared with the field macro-evaluation.The study shows that the H1 landslide and BW1 unstable slope in Banbin Gold Mine are in an unstable to basic stable state,and there is a possibility of sliding,which needs to be treated.?3?According to the danger,harm object and harm degree of large-scale landslide in Banbing Gold Mine,two engineering treatment schemes are put forward.After comparative analysis,the comprehensive treatment scheme of anti-slide pile,interception drainage and backfill is determined,and the treatment project is designed.At present,the treatment project has been completed,and good results have been achieved,which can provide reference for similar landslide treatment.