丁山矿区边坡工程地质特征及稳定性评价

Study on Engineering Geological Characteristicsand Slope Stability Evaluation in Dingshan Mining Area

为探究马鞍山丁山矿区露天边坡的稳定性,通过调查工程地质和水文地质条件,基于赤平投影分析法,发现北侧边坡I、II、III区局部存在崩塌迹象。采用不平衡推力法,计算北侧边坡各区在天然工况、降雨饱和工况和地震工况下的稳定性系数,认为I、III区岩质边坡在各工况下整体处于稳定状态,II区滑坡在天然工况下处于欠稳定状态,在暴雨、地震工况下已处于不稳定状态。研究结果为矿山边坡生态恢复设计和生产建设提供参考。

In order to explore the stability of open-pit slope in Dingshan mining area of Maanshan,through the investigation of engineering geological and hydrogeological conditions,based on the stereo⁃graphic projection analysis method,it is found that there are local collapse signs in I,II and III areas of the northern slope.The unbalanced thrust method is used to calculate the stability coefficients of each zone of the northern slope under natural conditions,rainfall saturation conditions and seismic conditions.It is considered that the rock slopes in zones I and III are in a stable state as a whole under various conditions,and the landslides in zone II is in a state of under-stable under natural conditions,and are in an unstable state under rainstorm and earthquake conditions.The research results provide reference for ecological resto⁃ration design and production construction of mine slope.