浙东南火山岩矿山边坡整体变形破坏机制及稳定性研究

Research on the deformation failure mechanism and stability of slope along volcanic rock mines in the southeast region of Zhejiang Province

为进一步探究浙东南火山岩矿山边坡整体变形破坏机制及稳定性,以浙江温州市某海岛矿山边坡为例,在全面调查边坡岩体结构特征和变形破坏特征基础上,结合变形监测结果,分析了此类边坡的变形破坏机制,并运用3DEC离散元程序进行数值模拟验证。结果表明:火山岩矿山边坡的变形破坏主要受自身结构及区域主要结构面产出状态控制;与坡面大角度相交的裂隙多演化为变形侧边界,与坡面小角度相交、倾向坡外的裂隙面或其组合则演化为变形底边界;边坡凸出部位是边坡稳定性的薄弱点,在矿山边坡设计中应尽量减少平面线形的变化,增强边坡整体稳定性。

In order to further research on the deformation failure mechanism and stability of slope along volcanic rock mines in the southeast region of Zhejiang Province,the article takes a slope on an island in Wenzhou City,Zhejiang Province as an example.Based on a comprehensive investigation of the structural characteristics and deformation-destruction characteristics of the slope rock mass,combined with the results of deformation monitoring,the article analyzes deformation-destruction mechanism of this type of slope,and carries out numerical simulation verification using 3DEC discrete element program.The results show that the deformation failure of rock slope is mainly controlled by its own structure and regional main discontinuities output state.The cracks intersecting with the large angle of the slope evolve into deformation side boundaries,while those intersecting with small angles or tending to outside of the slope or their combinations evolve into deformation bottom boundaries.The protruding parts of the slope are weak areas in terms of stability,so plane linear changes should be minimized in mine slope design to enhance overall stability.