Characteristics and Cause Analysis of Soil Slope Landslides in Open-Pit Mines

本文基于现场调查、勘探、工程实践、综合分析等，对天长市谕兴地区建筑用玄武岩矿南侧边坡J6~J7段滑坡体特征、滑坡成因及治理方案进行分析，分析结果表明：1. 矿界南侧边坡为三级土质边坡，高27 m左右，J6~J7段滑坡体边界较清晰，呈近半圆形，前缘高程+20 m，后缘高程+46 m，前缘宽度138 m，长度约80 m，主滑方向22˚；2. 滑坡产生原因主要是由于强降雨条件下诱发土体结构弱化、抗剪强度降低；3. 滑坡治理方案采用置换法，治理后边坡稳定。Based on on-site investigation and exploration, engineering practice, comprehensive analysis, the characteristics, causes, and treatment plans of the J6-J7 section of the southern slope of the basalt mining boundary in the Yuxing area of Tianchang City were analyzed. The research results indicate that: 1. The southern slope of the mining boundary is a three-level soil slope with a height of about 27 m. The boundary of the J6-J7 section landslide is relatively clear, forming a nearly semi-circular shape with a leading edge elevation of +20 m, a trailing edge elevation of +46 m, a leading edge width of 138 m, a length of about 80 m, and a main sliding direction of 22˚. 2. The main cause of landslides is the weakening of soil structure and the decrease in shear strength induced by heavy rainfall conditions. 3. The landslide treatment plan adopts the replacement method, and the slope after treatment is stable.