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1988年4月13日,栗西尾矿库泄洪隧洞发生塌方,含有大量氰化物等剧毒物质的尾矿碴、废水,以每秒106立方米的流量,顺栗峪河汹涌而下,洛南县境内的栗峪河、西麻坪河、石门河下游及洛河87公里流程被严重污染。洛南县有16个乡(镇)56个村,2万多群众遭受突然袭击,损失极为严重。此外还波及到河南省卢氏等县,使得沿河两岸8,800多人生活用水和水产资源遭受毁灭性破坏。造成这次重大事故的原因是:对复杂的地质条件缺乏应有的认识,设计考虑不周到,施工质量低劣,库区管理不善。
April 13, 1988, Lixi tailings spillway tunnel collapse occurred, with a large amount of cyanide and other highly toxic substances tailings ballast, waste water, flow rate of 106 cubic meters per second, along the chestnut River raging down, Luonan The county’s Liyu River, West Ma Ping River, the lower reaches of Shimen River and Luo River 87 km process was seriously polluted. There are 16 townships (towns) and 56 villages in Luonan County. Over 20,000 people were attacked in a sudden and the loss was extremely serious. In addition, it also affected counties such as Lushi in Henan Province, causing the devastating destruction of 8,800 livelihoods and aquatic resources on both sides of the river. The reasons for this major accident are: lack of understanding of complex geological conditions, poor design considerations, poor construction quality and poor management of the reservoir area.