露天矿山多级土质边坡稳定性分析及加固技术

Stability Analysis and Reinforcement Technology for Multi-Level Soil Slopes in Open-Pit Mines

摘要: 本文基于现场调查、模拟分析、工程实践等，对天长市谕兴地区建筑用玄武岩矿矿界边坡稳定性进行调查、分析，分析结果表明：1、矿界东、南侧形成以+40 m、+30 m、+20 m为平台的三级土质边坡，坡高7~10 m，坡度约30~40˚；2、PM1、PM2、PM3三个剖面天然工况下边坡安全系数分别为1.19、1.23、1.17，暴雨工况下边坡安全系数分别为1.08、1.06、1.02，表明正常工况下边坡是稳定的，但暴雨工况下边坡存在失稳风险；3、多级边坡采取了微型抗滑桩板墙加固工程、坡面加固工程、坡肩加固工程、边坡监测工程等措施，确保边坡稳定。

Abstract: Based on field investigations, simulation analysis, and engineering practices, this article investigates and analyzes the stability of the slope boundary of the basalt mine used for construction in the Yuxing area of Tianchang City. The analysis results show that: 1. Three-level soil slopes with platforms at +40 m, +30 m, and +20 m are formed on the east and south sides of the mine boundary, with a slope height of 7~10 m and a gradient of about 30˚~40˚; 2. The safety factors of slopes under natural conditions for profiles PM1, PM2, and PM3 are 1.19, 1.23, and 1.17, respectively, while the safety factors under rainstorm conditions are 1.08, 1.06, and 1.02, respectively. This indicates that the slope is stable under normal conditions but poses a risk of instability under rainstorm conditions; 3. Measures such as micro-pile sheet wall reinforcement engineering, slope surface reinforcement engineering, slope shoulder reinforcement engineering, and slope monitoring engineering have been adopted for multi-level slopes to ensure their stability.