基于DL Breach模型的尾矿库溃坝影响数值分析  

Numerical Analysis of Dam Break Impact of Tailings Pond Based on DL Breach Model

作　　者：宁伟 李瑜 吴蒙蒙 杨超 NING Wei;LI Yu;WU Mengmeng;YANG Chao(CMOC Group Limited;Luanchuan Environmental Protection Bureau;College of Water Conservancy and Hydropower Engineering,Hohai University)

机构地区：[1]洛阳栾川钼业集团股份有限公司 [2]栾川县环境保护局 [3]河海大学水利水电学院

出　　处：《现代矿业》2022年第10期234-238,243,共6页Modern Mining

摘　　要：尾矿库溃坝事故危险性大,尚缺乏有效的溃坝沙流预测机制。基于DL Breach模型,提出一种尾矿库溃坝沙流的计算方法,依据尾矿下泄沙流的性质,结合尾矿库溃坝的工程经验及规范,建立溃坝沙流运动模型,计算溃坝过程中的主要影响参数,分析下泄沙流的淹没范围、淹没深度的演变规律。结果表明,溃坝下泄沙流的堆积深度总体上先增大后减小,下泄沙流在钻天道沟谷内淹没深度较大,淤积较多,最大堆积深度达2.48 m;随着与初期坝的距离逐渐变大,下游的3#桥处的最大淹没深度不超过1 m,整体安全风险可控。利用该模型进行尾矿库溃坝数值模拟,可以预测尾矿坝溃决可能引起的灾害,对尾矿库的安全运行具有指导意义。The risk of dam-breaking accidents in tailings ponds is high,and there is still no effective prediction mechanism for dam-breaking sand flow.Based on the DL Breach model,a calculation method of dam-break sand flow in tailings reservoir is proposed.According to the nature of sand flow discharged from tailings reservoir,combined with the engineering experience and specifications of dam-break of tailings reservoir,the movement model of dam-break sand flow is established,the main influencing parameters in the process of dam-break are calculated,and the evolution law of submerged range and submerged depth of discharged sand flow is analyzed.The results show that the accumulation depth of the sediment discharge flow under the dam break increases first and then decreases.The submerged depth of the sediment dis⁃charge flow in the drilling channel valley is large,and the deposition is more,and the maximum accumula⁃tion depth is 2.48 m.As the distance from the initial dam gradually increases,the maximum submerged depth at the downstream 3#bridge does not exceed 1 m,and the overall safety risk is controllable.The nu⁃merical simulation of tailings dam break using this model can predict the possible disasters caused by tail⁃ings dam break,which has guiding significance for the safe operation of tailings dam.

关 键 词：尾矿库溃坝 DL Breach模型 泄砂流量 淹没范围 淹没深度 

分 类 号：TD926.4[矿业工程—选矿]