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峨口铁矿第一、二尾矿库的服务年限只有13.4年,为了解决后期尾矿储存问题,根据经济、技术综合分析结果,选择第一尾矿库加高至270m作为解决的最佳方案。为此,冶金部矿山司于1993年7月22日至24日在峨口铁矿主持召开技术论证会。该矿第一尾矿库采用中线法筑坝加高有许多有利条件:“V”型沟谷地形有利于加高。尾矿坝堆筑高度达150m,坝体仍处于稳定状态。中线法筑坝加高至270m技术上优于上游法,只要采取排渗措施就能保证其稳定性,这些措施包括网状自流排渗工程、原初期滤水堆石坝外坡面加滤层工程、沉砂体坡基设滤水带排渗工程、坝体渗流水排水管道工程。中线法筑坝加高能降低调洪高度,减少排洪量,增大回水量,大
The service life of the first and second tailings mines of Ekou Iron Mine is only 13.4 years. In order to solve the problem of tailings storage in the later stage, according to the comprehensive economic and technical analysis results, the first tailings mine is selected to be as high as 270m as the best solution . To this end, the Ministry of Metallurgical Minerals Division in July 22, 1993 to 24 in the Ekou iron ore chaired a technical demonstration. There are many favorable conditions for damming the first tailings dam by using the midline method: the “V” shaped valley topography is favorable for heightening. Tailings dam building height of 150m, the dam is still in a stable state. The mid-line dam height increase to 270m technically superior to the upstream method, as long as the discharge control measures to ensure its stability, these measures include reticular gravity drainage project, the original filter rockfill dam on the outer surface of the filter layer Engineering, sedimentation sand base slope with drainage and drainage engineering, dam seepage water drainage pipeline project. The midline dam height increase can reduce flood control height, reduce flood discharge, increase backwater, large