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为了解虹吸井对尾矿坝地震液化的影响,以东北地区弓长岭尾矿坝为例,通过在坝体施加虹吸井的方法进行动力计算,比较了排渗措施失效后与施加虹吸井后对坝体及库区液化区分布的影响,并通过有限元方法和拟静力法计算了坝坡的安全系数。结果表明,排渗措施失效后液化区主要分布于坝体溢出点以下区域及尾矿库库区内,坝体安全系数不符合规范要求,且尾矿坝不安全;施加虹吸井后液化区显著减小,仅分布于尾矿库库区内,库区水边线附近分布区域最大,且坝体安全系数能满足现行规范要求,尾矿坝安全稳定。
In order to understand the influence of siphon wells on the liquefaction of tailings dam, taking Gongchangling Tailings Dam in northeastern China as an example, dynamic calculation is made by applying siphon wells in the dam. After the failure of drainage measures and the application of siphon wells On the distribution of the liquefaction area in the dam and the reservoir area, and calculates the safety factor of the dam slope by the finite element method and quasi-static method. The results show that the liquefaction zone is mainly distributed in the area below the spill point and in the tailings reservoir area after the failure of the drainage measures. The safety coefficient of the dam body does not meet the requirements of the code and the tailings dam is not safe. The liquefaction area after applying the siphon well is significant It is only distributed in the tailings reservoir area. The distribution area near the waterfront of the reservoir area is the largest, and the safety coefficient of the dam body can meet the requirements of current codes. The tailings dam is safe and stable.