振动台对尾矿砂振动性能试验研究
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
经过室内基本物性试验确定尾矿库堆坝材料的物性指标。在此基础上使用机械式振动试验台对尾矿砂振动性能进行研究。通过改变尾矿砂含水率和调整振动台振幅的方法,观察不同含水率下尾矿砂密度变化与振幅的关系,探讨尾矿砂出现振动液化现象的临界含水率,总结尾矿砂在出现涌水现象后发生的破坏形式,同时记录下引起尾矿砂密度变化和液化破坏的振动速度值。研究表明:尾矿砂中出现液化的含水率临界值是16.65%,该含水率下尾矿砂出现振动液化现象的振动速度值是28.68 cm/s。含水率为17.56%的尾矿砂出现振动液化现象的振动速度值是27.1 cm/s。尾矿砂出现涌水现象后会伴随冒砂现象的发生,并且加剧砂土表层开裂,甚至出现塌陷,导致砂体的结构遭到破坏,稳定性变差。
The typical heap dam material properties indicators were confirmed by laboratory experiment. The mechanical shaking table was used to study the vibration properties of the tailings sand. By changing the tailings sand moisture content and the amplitude of the shaking table,the relationship of tailings sand density variation and amplitude under the condition of different moisture content was observed; the critical moisture content of tailings sand was discussed; the phenomena of vibration liquefaction and the damage forms of tailings sand after water gushing were also explored and summarized. Meanwhile,the vibration velocity influencing tailings sand density and liquefied destruction changing was recorded. The studies show that the threshold of tailings sand liquefying was 16. 65%,where the liquefaction vibration velocity was 28. 68 cm / s. On the condition of moisture content 17. 56%,the sand liquefaction vibration velocity was 27. 1 cm / s. Water gushing phenomenon was accompanied with the tailings sand eruption,which exacerbated the sand surface crack and collapse,body structure destruction and disability.
引文
[1]王国华,段希祥,杨溢,等.高烈度地震对龙都尾矿坝稳定性影响的研究[J].昆明理工大学学报,2008,8(4):1-6.[1]WANG Guo-hua,DUAN Xi-xiang,YANG Yi,et al.Research on stability impact of Longdu tailings dam under high intensity earthquake[J].Journal of Kunming University of Science and Technology(Science and Technology),2008,8(4):1-6.(in Chinese)
    [2]陈存礼,何军芳,胡再强,等.动荷作用下饱和尾矿砂孔压和残余应变演化特性[J].岩石力学与工程学报,2006,25(S2):4034-4039.[2]CHEN Cun-li,HE Jun-fang,HU Zai-qiang,et al.Developing characteristics of pore water pressure and residual deformation of tailings sands under cyclic load[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(S2):4034-4039.(in Chinese)
    [3]陈国兴,左熹,王志华,等.可液化场地地铁车站结构地震破坏特性振动台试验研究[J].建筑结构学报,2012,33(1):128-137.[3]CHEN Guo-xing,ZUO Xi,WANG Zhi-hua,et al.Shaking table test on seismic failure characteristics of subway station structure at liquefiable ground[J].Journal of Building Structures,2012,33(1):128-137.(in Chinese)
    [4]叶海林,郑颖人,李安洪,等.地震作用下边坡抗滑桩振动台试验研究[J].岩土工程学报,2012,34(2):251-257.[4]YE Hai-lin,ZHENG Ying-ren,LI An-hong,et al.Shaking table tests on stabilizing piles of slopes under earthquakes[J].Chinese Journal of Geotechnical Engineering,2012,34(2):251-257.(in Chinese)
    [5]吕淑然,王冀飞,董华兴.爆破作用下坝体浸润线变化对尾矿坝稳定性的影响[J].金属矿山,2013(11):152-157.[5]LV Shu-ran,WANG Ji-fei,DONG Hua-xin.Changes in dam seepage line under the blasting effect on the stability of the tailings dam[J].Metal Mine,2013(11):152-157.(in Chinese)
    [6]吕淑然,王冀飞.爆破振动对上游式尾矿坝安全的影响[J].金属矿山,2013(9):22-25.[6]LV Shu-ran,WANG Ji-fei.Impact of the blasting vibration on the safety of the upstream tailings dam[J].Metal Mine,2013(9):22-25.(in Chinese)
    [7]杨凯,吕淑然,董华兴.地下采矿爆破振动对地面环境影响的监测与分析[J].金属矿山,2013(10):144-147.[7]YANG Kai,LV Shu-ran,DONG Hua-xin.Monitoring and analysis of impact of blast vibration on ground environment in underground mining[J].Metal Mine,2013(10):144-147.(in Chinese)
    [8]尹光志,敬小非,魏作安,等.粗细尾砂筑坝渗流特性模型试验及现场实测研究[J].岩石力学与工程学报,2010,2(1):3710-3717.[8]YIN Guang-zhi,JING Xiao-feil,WEI Zuo-an.Study of model test of seepage characteristics and field measurement of coarse and fine tailings dam[J].Chinese Journal of Rock Mechanics and Engineering,2010,2(1):3710-3717.(in Chinese)
    [9]李永胜.边坡振动台模型试验及相关问题研究[D].大连:大连理工大学,2009.[9]LI Yong-sheng.Shaking table test on the model of slope and research on correlated issues[D].Dalian:Dalian University of Technology,2009.(in Chinese)
    [10]王燕华.浅谈地震模拟振动台试验[J].工业建筑,2008,38(7):34-36.[10]WANG Yan-hua.Elementary introduction to shaking table test seismic simulation[J].Industrial Construction,2008,38(7):34-36.(in Chinese)
    [11]王燕华,程文,陆飞.地震模拟振动台的发展[J].工程抗震与加固改造,2007,29(5):53-56.[11]WANG Yan-hua,CHENG Wen,LU Fei.Development of the shaking table[J].Earthquake Resistant Engineering and Retrofitting,2007,29(5):53-56.(in Chinese)
    [12]沈建德,吕西林.地震模拟振动台及模型试验研究进展[J].结构工程师,2006,22(6):55-58.[12]SHEN Jian-de,LV Xi-lin.Research advances on simulating earthquake shaking tables and model test[J].Structural Engineers,2006,22(6):55-58.(in Chinese)
    [13]叶献国,刘涛,徐勤,等.振动台三维模拟地震试验研究[J].合肥工业大学学报,1998,21(1):1-6.[13]YE Xian-guo,LIU Tao,XU Le,et al.Experimental study on seismic shaking table three-dimensional simulation[J].Hefei University of Technology,1998,21(1):1-6.(in Chinese)

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心