2023年8月上世界有色金属145前沿技术Leading-edgetechnology广西某铝矿排泥库工程场地发震构造及地震危险性评价研究刘路1,张海娟2,王康3,彭三曦1*,高栋1(1.桂林理工大学地球科学学院,广西桂林541004;2.长沙有色冶金设计研究院有限公司,湖南长沙410000;3.中国铝业有限公司广西分公司,广西百色531499)摘要:针对广西平果那荣排泥库加高扩容项目,通过地震地质调查等方法,并结合地震活动性,研究其工程场地发震构造及地震危险性。通过两次地震的震源机制解分析,可得右江断裂是排泥库地震的主要发震构造,右江断裂的活动容易导致排泥库发生泥浆泄漏事故;通过采用时间相依的地震潜势评估方法结合消逝比分析,未来50年,右江断裂带有可能发生中强震;未来百年内,排泥库附近可能发生5级左右地震。研究可为类似尾矿库加高扩容工程及抗震设计提供参考,意义重大。关键词:排泥库;发震构造;地震危险性;右江断裂中图分类号:P315.5;P315.9;X43文献标识码:A文章编号:1002-5065(2023)15-0145-3ResearchonseismogenicstructureandseismicriskassessmentofanaluminumminesludgedumpengineeringsiteinGuangxiLIULu1,ZHANGHai-juan2,WANGKang3,PENGSan-xi1*,GAODong1(1.CollegeofEarthSciences,GuilinUniversityofTechnology,Guilin541004,China;2.ChangshaNonferrousMetallurgyDesignandResearchInstituteCo.,LTD.,Changsha410000,China;3.GuangxiBranchofAluminumCorporationofChina,Baise531499,China)Abstract:BasedontheheighteningandexpansionprojectofNarongmuddrainagereservoirinPingguo,Guangxi,theseismogenicstructureandseismicriskoftheprojectsitewerestudiedbymeansofseismicgeologicalsurveyandseismicactivity.Throughtheanalysisofthefocalmechanismofthetwoearthquakes,itcanbeconcludedthatYoujiangfaultisthemainseismogenicstructureofthemuddrainagereservoirearthquake,andtheactivityofYoujiangfaultiseasytocausethemudleakageaccidentofthemuddrainagereservoir.Basedonthetime-dependentseismicpotentialassessmentmethodcombinedwiththelapseratioanalysis,moderateandstrongearthquakesarelikelytooccurintheYoujiangfaultzoneinthenext50years.Inthenexthundredyears,theremaybeamagnitude5earthquakenearthemudreservoir.Theresearchcanprovidereferenceforsimilartailingspondheighteningandexpansionen...