【摘要】 上游筑坝法尾矿坝长期处于欠固结状态,密实度较低、结构松散,在频繁的矿山生产爆破地震作用下极易出现液化区,进而导致坝体失稳。针对某矿业公司对矿山生产爆破导致产生的水平地震加速度进行了测试,并将其作为输入地震波,对尾矿坝进行了动力有限元响应分析。分析结果表明,初期坝较后期堆积坝响应强烈,在爆破震动作用下尾矿坝体内没有液化区产生,因此可以认为矿山目前所采用的生产爆破规模不会对坝体稳定性产生不利影响。更多还原

【Abstract】 Tailing dams built by upstream construction method are in under-consolidated state for a long time and has low density and loose structure,are very easy to be liquefied and even destabilized under blasting vibration in mine production.The horizontal seismic acceleration produced by production blasting was measured in some mining company,and was adopted as the input of seismic wave to analyze the response of tailing dam on blasting vibration with dynamic finite element method.The analysis results showed that the response of initial dam is larger than that of the latter accumulation dam,and there is no liquefied area in tailing dam under blasting vibration.Therefore,it can be regarded that the current scale production blasting has not adverse effects on the stability of the tailings dam.更多还原