摘要
本文以四川省攀枝花市米易县某尾矿库为研究对象,采用FL O-2D数值模拟软件对不同溃坝形式的尾矿库进行数值模拟,对结果进行对比分析,确定溃坝影响范围。通过计算尾矿库洪水漫顶参数,单点瞬时溃坝和多点瞬时溃坝的溃坝参数,代入FL O-2D软件最终获得相应的数值模拟成果。结果表明,在所有溃坝形式下,单点溃坝造成的堆积最多,破坏性最强,尾细砂和尾粉砂大部分集中在主体坝后段,相较之下多点瞬时溃坝对受灾地区破坏性较弱,受灾程度相对缓和,但受灾面积显著增大,尾砂沉积最广,主要分布在各座坝体初期坝和淹没地区;而由于洪水漫顶造成的溃坝灾害流量最小,相较于瞬时溃坝而言,破坏性较小,受灾面积最小,尾砂主要沉积在河道中,但需要注意的是,在伴随大量降雨时,该灾害可能会同时引发其他次生灾害。
This article takes a tailings pond in Miyi County,Panzhihua City,Sichuan Province as the research object.FLO-2D numerical simulation software is used to simulate tailings ponds with different forms of dam failure,and the results are compared and analyzed to determine the impact range of dam failure and ensure the personal and property safety of downstream residents.By calculating the flood overtopping parameters of tailings pond,the dam failure parameters of single point instantaneous dam failure and multi point instantaneous dam failure,and substituting them into FLO-2D software,the corresponding numerical simulation results are finally obtained.The results show that under all forms of dam failure,single point dam failure causes the most accumulation and destruction,with most of the tail fine sand and tail powder sand concentrated in the rear section of the main dam.In contrast,multi point instantaneous dam failure has weaker damage to the affected area,and the degree of disaster is relatively mild.However,the affected surface area significantly increases,and the tail sand deposition is the widest,mainly distributed in the initial dam and flooded areas of each dam body;However,due to the minimum flow rate of dam failure caused by flood overtopping,compared to instantaneous dam failure,the damage is relatively small and the affected area is the smallest.Tailings are mainly deposited in the river channel,but it should be noted that when accompanied by a large amount of rainfall,this disaster may also cause other secondary disasters.
作者
林子扬
王卫红
杨宏珺
LIN Ziyang;WANG Weihong;YANG Hongjun
出处
《中国矿山工程》
2023年第6期12-16,21,共6页
China Mine Engineering
基金
四川省省级科研院所基本科研业务费项目(2019JDKY0028)。
关键词
尾矿库
溃坝数值模拟
溃决方式
FLO-2D
tailings pond
numerical simulation of dam break
mode of defeat
FLO-2D
