榆木沟尾矿库自流式辐射井排渗系统施工关键技术

Key Technologies of Natural Flow Radiation Well for Seepage Drainage in Yumugou Tailings Pond

摘要:

浸润线过高导致的渗流状况不良已经成为许多尾矿库的主要安全隐患，是引起尾矿库溃坝事故的最直接原因之一。自流式辐射井排渗系统具有自流排水安全可靠、辐射式集渗管水平伸入坝体范围广、排水量大、水位下降快、成本低、使用寿命周期长、后期管理运行方便等优势。在榆木沟尾矿库2号大口辐射井工程中应用了自流式辐射井排渗系统，取得了良好的技术和经济效果。结合该工程实践，对自流式辐射井排渗系统在尾矿库排渗工程中的施工关键技术问题进行了研究和探讨，为今后类似工程提供了有益的经验。

Abstract:

Bad seepage behavior caused by high saturation line has become the main potential safety hazard of tailings pond, which is one of the most direct reasons of tailings dam-break accidents. The natural flow radiation well for seepage draining system has advantages of safe and reliable drainage, seepage collecting pipe horizontally reaching into wide range of the dam, large displacement, fast decreasing of water level, low cost, long service life and convenient final-period management. Natural flow radiation well has been applied to 2# radiation well in Yumugou tailings pond with remarkable technical and economic benefits. Combined with the construction practice, the research and discussion are made on the key construction technologies of natural flow radiation well for seepage draining system, which can provide the beneficial experience for the similar projects in future.