本文選題：上游式尾礦壩 + 粒度分布��； 參考：《金屬礦山》2017年02期

【摘要】：1976年7月28日發(fā)生的唐山大地震對(duì)區(qū)域內(nèi)的多個(gè)尾礦壩造成了不同程度的破壞。為研究地震作用下尾礦壩體的響應(yīng)特征,以唐山地震前后某尾礦壩勘察成果為依據(jù),分析了地震對(duì)尾礦粒度分布、抗剪強(qiáng)度及尾礦壓縮特性的影響。研究結(jié)果表明:1地震后,尾礦壩上層(埋深≤12 m范圍)細(xì)粒尾礦增加,下層(埋深12~25 m范圍)細(xì)粒尾礦減少。2地震對(duì)尾礦壩的影響具有區(qū)域性。地震后靠近下游壩坡區(qū)域尾砂內(nèi)摩擦角總體降低,上層尾礦變松散,下層尾礦變密實(shí);靠近庫內(nèi)水邊線區(qū)域,上層尾礦變密實(shí),下層尾礦變松散。3地震作用下尾礦的壓縮特性基本不受影響。研究成果可以為地震區(qū)上游式尾礦壩的抗震設(shè)計(jì)提供參考。
[Abstract]:The Tangshan earthquake on July 28, 1976 caused various damage to several tailings dams in the region. In order to study the response characteristics of tailings dam under earthquake action, based on the survey results of a tailings dam before and after the Tangshan earthquake, the effects of earthquake on tailings particle size distribution, shear strength and tailings compression characteristics are analyzed. The results show that after the Wei 1 earthquake, the fine tailings in the upper layer of the tailings dam (buried depth 鈮，

本文編號(hào)：2068993