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露天矿边坡坡体高、坡度大加之频繁爆破震动等人为因素,使滑坡成为露天矿最为常见的灾害之一。滑坡产生的堆积体具有宽级配和高松散度的特性,使滑坡堆积体的稳定性较差,为保证矿区的安全生产,对堆积体进行稳定性分析及治理是非常必要的。以某露天矿为例,经现场勘察基本获得该矿区的工程地质条件以及岩土体结构特征及参数。为获得精准滑坡堆积体三维地形数据,运用了三维激光扫描测量技术,并利用该三维数据建立滑体的数值模型,在此基础上采用Flac3D数值计算软件对滑坡堆积体现状的稳定性进行分析,表明该滑体现处于欠稳定状态。为确保矿区今后开采、施工建设以及工作人员的安全,提出削坡减载的治理措施,并对治理后的边坡稳定性进行分析,说明该治理方法是有效可行的。
Open pit slope high slope, coupled with frequent blasting vibration and other human factors, the landslide has become one of the most common open-pit mine disaster. The landslide-generated accumulation body has the characteristics of wide-graded distribution and high-looseness, which makes the stability of the landslide deposit poor. In order to ensure the safe production in the mining area, it is necessary to analyze and control the stability of the deposit. Taking a surface mine as an example, the geological conditions of the mine and the structural characteristics and parameters of the rock and soil are basically obtained through site survey. In order to obtain 3D terrain data of accurate landslide deposit, the 3D laser scanning measurement technology was used, and the numerical model of the sliding body was established by using the 3D data. On the basis of this, the stability of landslide accumulation was analyzed by using Flac3D numerical calculation software, Show that the slippery body is in an unstable state. In order to ensure the mining in the future, the construction and the safety of the staff, the paper puts forward the control measures of cutting slope and loading, and analyzes the slope stability after the treatment. It shows that the method is effective and feasible.