海州露天矿北帮滑移机理及防治措施

Sliding mechanism and prevention measures of north high wall in Haizhou Open Pit Mine

在阜新海州露天矿关闭,改建成国家矿山公园后,面临滑坡、崩塌等诸多地质灾害问题,给矿山生态环境带来不利影响,同时也威胁着矿区周边人的生命和财产安全。针对露天矿边坡滑移工程治理难题,以海州露天矿北帮滑坡治理工程为例,首先利用有限差分软件FLAC3D,建立海州露天矿北帮边坡三维数值计算模型,然后应用强度折减法进行计算,再后通过对边坡滑移特征的研究,获得了北帮各典型模拟区域的安全系数,并在此基础上提出削坡整形、泄水孔排水疏干、抗滑桩和锚杆钢筋混凝土格构护坡等滑坡工程防治措施,在施工中取得了良好的效果,对类似工程项目有借鉴意义。

After Fuxin Haizhou Open Pit Mine closed and became a National Mine Park,the landslide,cllapse and other many geological problems faced would bring adverse effects to the mine ecologic environment and also would threaten the human life and property safety around the mining area.According to the control diffi-culties of the slope sliding engineering in the open pit mine,taking the slope sliding engineering of the north high wall in Hiazhou Open Pit Mine as an example,a finite difference software FLAC3D was firstly applied to establish the slope 3D numerical calculation model of the north high wall in Haizhou Open Pit Mine.Then a strength reduction method was applied to conduct the calculation,a study was conducted on the slope sliding features and the safety coefficients of each typical simulation area in the north high wall were obtained.Based on the circumstances,a slope cutting and shaping,drain hole for water drainage,anti-slide piles,bolt reinforced concrete lattice slope protection and other landslide engineering prevention and control measures were provided with good results from the construction and would have the referential significance to the similar engineering projects.