垮坝事故 2000年10月18日上午50分,广西南丹县大厂镇鸿图选矿厂尾矿库发生重大垮坝事故,共造成28人死亡,56人受伤,70间房屋不同程度毁坏,直接经济损失340万元。 2000年10月18日上午9时50分,尾矿库后期坝中部底层首先垮塌,随后整个后期堆积坝全面垮塌。共冲出水和尾砂14300立方米,其中水2700立方米,尾砂11600立方米,库内留存尾矿13100立方米。尾砂和库内积水直冲坝首正前方的山坡反弹回来后,再沿坝侧20米宽的山谷向下游冲去,一直冲到离坝首约700米处。其中绝大部分尾矿砂则留在坝首下方的30米范围内。尾矿坝下的34间外来民工工棚和36间基建队的房屋被冲垮,共有28人死亡,56人受伤。 这是一起由于企业违规建设、违章操作,有关职能部门管理和监督不到位而发生的重大责任事故。 1、事故的直接原因 Collapse of the accident at 50 o’clock on the 18 October 2000, Dantong Town, Nandan County, Hongtu Concentrator tailings dam a major accident occurred, a total of 28 people were killed, 56 were injured, 70 houses were destroyed to varying degrees, directly Economic loss of 3.4 million yuan. At 9:50 on October 18, 2000, the bottom of the tail dam at the end of the dam collapsed first and then the entire dam collapsed. A total of 14300 cubic meters of water and tailings were washed out, of which 2700 cubic meters of water, 11,600 cubic meters of tailings and 13,100 cubic meters of tailings retained in the storehouse. Tailings and reservoir water directly into the front of the hill dam bounce back, and then along the dam side of 20 meters wide valley rushed downstream, has been rushed to the dam about 700 meters. Most of the tailings sand stays at the bottom of the dam within 30 meters. Thirty-four migrant workers’ sheds and 36 infrastructural buildings under the tailing dam were washed away, killing 28 people and injuring 56 others. This is a serious accident that occurred as a result of illegal construction, illegal operation, management and supervision of relevant functional departments are not in place. 1, the direct cause of the accident