Influence of particle size on overtopping dam break of tailings dam

doi:10.16265/j.cnki.issn1003-3033.2020.04.025

Abstract

Abstract: In order to explore overtopping break reactions of dam constructed by tailings of different particle sizes, with tailings of Yancang tailings pond in Yongping Copper Mine used as dam material, physical dam-break test was carried out with medium sand, fine sand and silt. Then, numerical simulation was conducted for verification by using FLOW^3D software. The results show that when middle sand is used, dam collapse is mainly represented by surface scouring and displacement failure while being represented majorly by downward erosive when silt is used, and is both of them in the case of fine sand. The physical test and numerical simulation achieve good consistency in terms of dam break flow and time, etc., which indicates reliability of the method combining both test and numerical calculation in simulating tailings dam break.

Key words: tailings dam, particle size, overtopping dam break, physical experiment, numerical simulation

CLC Number:

X936

WU Ligong, XIAO Lixing, LIU Xiaofeng, YAO Chi, JIANG Qinghui, ZHOU Chuangbing. Influence of particle size on overtopping dam break of tailings dam[J]. China Safety Science Journal, 2020, 30(4): 160-165.

References

[1] 皇甫凯龙,廖文景,孙志辉,等.尾矿坝溃决砂流数值模拟研究及应用[J].中国安全科学学报,2015,25(8): 171-176.
HUANGFU Kailong, LIAO Wenjing, SUN Zhihui,et al.Numerical simulation of sandy flow due to mine tailings dam failure and its application[J].China Safety Science Journal,2015,25(8): 171-176.
[2] KWAK M,JAME D F,KLEIN KA. Flow behavior of tailings paste for surface disposal[J]. International Journal of Mineral Processing,2005,77(3): 139-153.
[3] MIAN M H,YANFUL E K. Tailings erosion and resuspension in two mine tailings ponds due to wind waves[J]. Advances in Environmental Research,2003,7(4): 745-765.
[4] MILTON A,COOKE J A,JOHNSON M S. A comparison of cadmium in ecosystems on metalliferous mine tailings in Wales and Ireland[J]. Water,Air,and Soil Pollution,2004,153(1): 157-172.
[5] 吴宗之,梅国栋.尾矿库事故统计分析及溃坝成因研究[J].中国安全科学学报,2014,24(9): 70-76.
WU Zongzhi, MEI Guodong. Statistical analysis of tailings pond accidents and cause analysis of dam[J]. China Safety Science Journal,2014,24(9): 70-76.
[6] 张力霆,齐清兰,李强,等.尾矿库坝体溃决演进规律的模型试验研究[J].水利学报,2016,47(2): 229-235.
ZHANG Liting, QI Qinglan, LI Qiang, et al. Experimental model study on dam break and evolution law of tailings pond[J]. Journal of Hydraulic Engineering,2016,47(2): 229-235.
[7] 魏勇,许开立.尾矿坝漫顶溃坝机理及过程研究[J].金属矿山,2012(4): 131-135.
WEI Yong, XU Kaili. Research on mechanism and process of tailing dam break due to overtopping[J]. Metal Mine,2012(4): 131-135.
[8] 曹帅,张红武,赵晨苏,等.变坝坡赤泥库漫顶溃坝模型试验研究[J].水利学报,2019,50(4):428-438..
CAO Shuai, ZHANG Hongwu, ZHAO Chensu, et al. Experimental study on dam-break of a red mud reservoir with complex dam slopes[J]. Journal of Hydraulic Engineering,2019,50(4): 428-438.
[9] WAHL T L. Predicition of embankment dam breach parameters:a literature review and needs assessment[R]. U.S. Bureau of Reclamation, 1998.
[10] RALSTON D C. Mechanics of embankment erosion during overflow[C]. Proceeding in 1987 National Conference on Hydraulic Engineering,1987: 733-738.
[11] 邓曌,陈生水,钟启明.尾矿库漫顶溃坝数学模型研究与应用[J].岩土工程学报,2017,39(5): 932-938.
DENG Zhao, CHEN Shengshui, ZHONG Qiming. Mathematical model for breach of tailings dam due to overtopping and its application[J]. Chinese Journal of Geotechnical Engineering,2017,39(5): 932-938.
[12] 黄仁杰,窦强,陈剑文.尾矿坝溃坝过程研究[J].路基工程,2018(增1): 164-169.
HUANG Renjie, DOU Qiang, CHEN Jianwen,. Research on process of tailings dam break[J]. Subgrade Engineering,2018(S1): 164-169.
[13] 倪旭,吕力行,彭媛.尾矿坝外坡比对漫顶逐渐溃坝的影响研究[J].甘肃科学学报,2014,26(5): 59-62.
NI Xu, LYU Lixing, PENG Yuan. Impact of tailings dam outer slope ratio on overtopping dam breach[J]. Journal of Gansu Sciences,2014,26(5): 59-62.
[14] 谢鉴衡.河流泥沙工程学(下册)[M].北京:水利出版社,1981: 212-223.
[15] 张红武,江恩惠,赵新建,等.黄河高含沙洪水模型的相似条件[J].人民黄河,1995(4):1-3,61.
[16] 杜艳强,王新武,张坤,等.细粒尾矿坝漫顶溃坝机制及灾变过程[J].中国安全科学学报,2017,27(2): 104-108.
DU Yanqiang, WANG Xinwu, ZHANG Kun, et al. Process and mechanism of fine grained tailings dam's failure due to overtopping[J]. China Safety Science Journal, 2017,27(2): 104-108.
[17] DICK R M, JAN H V. Breaching in fine sands and the generation of sustained turbidity currents in submarine canyons[J]. Sedimentology, 2003, 50(4): 625-637.
[18] SOULSBY R. Dynamics of marine sands [M]. London: Thomas Telford Publications, 1997: 43-61.