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舞阳铁矿选矿厂罗寺沟尾矿坝工程是1971年按原设计建成的。建成后因主体采选工程几次缓建,未能投产使用。1985年恢复建设后,根据本次主体采选设计规模和要求,并结合后期发展要求,决定对原有尾矿坝修补加固,该坝体总高度24.8m,坡度1∶2.25,全长121.49m。原设计为在亚粘土坝体坡面上干砌大块石护坡,修改设计后增设了闭合土工布中间夹碎石层等(图1),以便有效地使尾矿冲积体和自然流入的水通过这些过滤层渗透经渗水管过坝,避免坝体因长期受水浸泡而造成沉降。
The Luosigou tailings dam project of Wuyang Iron Ore Concentrator was built in 1971 according to the original design. After the completion of construction, the main construction project was delayed for several times and was not put into production. After the construction was resumed in 1985, based on the scale and requirements of the subject’s selection and design, combined with the requirements for later development, it was decided to repair and reinforce the existing tailings dam, with a total height of 24.8m, a gradient of 1:2.25, and a total length of 121.49m. . The original design was to dry block large stone slopes on the slope surface of sub-clay dams. After the design was modified, additional layers of closed geotextiles were added (Fig. 1) to effectively make the tailings alluvial and naturally flowing water. Through these filtration layers, seepage through the water seepage pipe to prevent the dam from settling due to long-term exposure to water.