尾矿库溃坝数值模拟研究

Numerical Simulation of Dam Break for Tailing Ponds

为了研究尾矿库溃坝后水流和尾砂对下游的影响,基于水流N-S方程和RNGκ-ε紊流模型建立了三维水动力溃坝模型,并采用推移质方程和悬移质方程进行尾砂的输运计算,利用水槽溃坝试验验证了所建数学模型的准确性。进而利用该数学模型模拟了九江市城门山铜矿拟建尾矿库溃坝情况,通过设置相应的监测点,从流速场、水深和尾砂淤积三个方面分析溃坝水砂对下游村庄的影响。结果表明,尾砂并未对下游村庄安全造成影响,而水流将淹没下游部分村庄。

In order to study the effect of water and tailing on the downstream after tailing ponds dam break,based on N-S equation of water flow and RNG turbulence model,a three-dimensional hydrodynamic dam-break model was established.And then tailing transportation was calculated by using the bed load equation and suspended load equation.The accuracy of the mathematical model was verified by the flume dam-break experiment.The mathematical model was used to simulate the dam-break of the proposed tailing dam in the Chengmenshan copper mine in Jiujiang City.By setting up the corresponding monitoring points,the influence of water and tailing on the downstream village after tailing pond dam break was analyzed from three aspects of velocity field,water depth and tailing deposition.The results show that tailing does not have impact on the safety of the downstream village,but water flow will flood the downstream partial village.