狮子滩水电站堆石坝块石混凝土墙及溢洪道廊道内,部分排水孔及扬压力孔自60年代末以来有黄色絮状物溢出。为查明絮状物的成因及来源,进行了现场勘察及室内试验并获得了大量资料。查清了絮状物中铁、钙元素的来源。铁元素主要来自孔内,部分来自地基岩体裂隙面的铁质薄膜或薄层。根据现有资料,作出了不会对大坝安全产生不利影响的评价。 Shizitan Hydropower Station rockfill dam stone concrete walls and spillway corridor, some of the drainage holes and Yang pressure hole since the late 60s yellow floc overflow. In order to find out the causes and sources of floccules, site investigation and laboratory experiments were conducted and a lot of information was obtained. Find the floc in the iron, calcium source. Iron mainly from the hole, some from the rock matrix fracture surface of the iron film or thin layer. Based on available information, an assessment is made that it will not adversely affect dam safety.