【摘要】 露天矿的开采形成了许多节理化的人工高边坡,这些边坡的岩土体结构破碎且复杂,因而在考虑边坡的整体稳定性时,地震力和地下水的作用不可忽略。为最大限度地减小开挖量及保证开采过程中的边坡整体稳定,结合青海省某大型露天镍钴矿开采后形成的节理化高陡边坡,在考虑地下水和地震力作用下,通过Geo Studio软件中的几大模块对研究区域整体边坡稳定性进行定量计算分析,并得到降雨条件下边坡稳定性及表面水平位移变化规律。之后通过对计算结果的分析得到研究区域内最佳开采坡角为44°,持续降雨状况下,坡中点的表面水平位移变化最大。最终得到开采坡角的角度对露天矿边坡整体稳定性影响巨大,且对该露天矿的开采提出了一些实用性建议。更多还原

【Abstract】 The mining of open-pit mines has formed many jointed artificial high slopes,and the rock and soil structures of these slopes are broken and complicated. Therefore,when considering the overall stability of the slope,the effects of seismic force and groundwater cannot be ignored. Taking a large open pit nickel-cobalt mine in Qinghai province as an example,the stability changes of the high and steep joint slope under the consideration of groundwater and earthquake are analyzed. And in order to minimize the amount of excavation and ensure the overall stability of the slope in the mining process,through quantitative calculation and analysis of the overall slope stability of the study area by several modules of GeoStudio software,slope stability and surface horizontal displacement changes under rainfall conditions are obtained. Then,the analysis of the calculation results shows that the best mining slope angle of the study area is 44°,and the change of surface horizontal displacement of the slope midpoint is the biggest under the condition of continuous rainfall. Finally,the angle of the mining slope obtained by the above analysis has a great impact on the overall stability of the open pit slope,and some practical suggestions for the mining of the open pit have been put forward.更多还原