高地震烈度区干堆尾矿库动力稳定性研究  

Study on dynamic stability of dry stacking tailings reservoir in a high earthquake-intensity area

作　　者：朱远乐 王涛[3] 唐绍辉 廖文景 孙昱 ZHU Yuanle;WANG Tao;TANG Shaohui;LIAO Wenjing;SUN Yu(Changsha Institute of Mining Research Co.Ltd,Changsha 410012,China;State Key Laboratory of Safety Technology in Metal Mines,Changsha 410012,China;School of Water Resources and Hydropower Engineering,Wuhan University,Wuhan 430072,China;Tianmen Water Conservancy Bureau of Hubei Province,Tianmen 431700,China)

机构地区：[1]长沙矿山研究院有限责任公司,湖南长沙410012 [2]金属矿山安全技术国家重点实验室,湖南长沙410012 [3]武汉大学水利水电学院,湖北武汉430072 [4]湖北省天门市水利局,湖北天门431700

出　　处：《武汉大学学报（工学版）》2020年第3期204-210,共7页Engineering Journal of Wuhan University

基　　金：湖南省重大科技专项项目(编号:2011FJ1003);国家安全生产监督管理总局安全生产重大事故防治关键技术科技项目(编号:hunan-0010-2014AQ)。

摘　　要：以甘肃省宕昌县某铅锌尾矿库改扩建工程为研究对象,该工程区域抗震设防烈度为Ⅷ度,分析了尾矿库的工程地质和库区场地湿陷性。针对细粒尾矿的动强度、孔压增长特征以及液化后的大变形特征,采用动三轴试验进行研究,分析尾矿库岩土体的动力特性。在人工拟合地震波作用下研究尾矿库改扩建工程一期、二期干堆尾矿库的动力反应、地震液化、永久变形及地震抗滑稳定性,研究结果表明,利用干堆尾砂进行堆存能够有效解决地震区抗液化的问题,同时由于干堆尾矿的堆筑,尾矿库的整体抗震性能得到改善,因此设计采用的堆存方式合理。该方法为下阶段设计以及尾矿库今后运行过程中的抗震提供了依据。Taking the lead-zinc tailing reservoir renovation and expansion project in Tanchang County, Gansu Province as the research object, where the seismic fortification intensity is 8 degrees, the engineering geology of the tailing reservoir and the site collapsibility of the reservoir area are studied in this paper. According to the dynamic strength, pore pressure growth and large deformation after liquefaction, the dynamic characteristics of rock and soil mass in the reservoir are analyzed using dynamic triaxial test. The dynamic response, seismic liquefaction, permanent deformation and anti-slip stability in the first phase and the second phase of dry stacking tailing reservoirs of the Reservoir Reconstruction and Expansion Projects are studied under the action of artificial seismic wave fitting. The research results show that the use of dry stacking for tailings can effectively solve the problem of anti-liquefaction in the high earthquake-intensity zone;and with the enhancement of the overall seismic effect of dry stack tailing reservoir, the design of the stacking method is reasonable. This study will provide the basis for the next phase design and the anti-seismic in the future operation of the reservoir.

关 键 词：高地震烈度区 地震动力分析 干堆尾矿 地震液化 稳定性 

分 类 号：TD926[矿业工程—选矿]