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Erosion and transport mechanisms of mine waste along gullies

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摘要 Mine waste debris flows continue to occur in China, and the disaster prevention and mitigation of these flows faces severe challenges since the mechanisms determining erosion and transport of mine waste along gullies are not yet fully understood. The erosion and delivery process of mine waste heaps was reproduced through flume experiments with the method based on field survey data of the Daxicha mine waste debris flow gully in the Xiaoqinling gold mining area. The results showed that the erosion and movement of mine wastes could be divided into three modes: minimal sediment movement, sediment sorting and delivery, and a large amount of sediment transfer. Moreover, there was an obvious amplification effect on peak discharge along with the formation and failure of temporary landslide dams during the erosion process. The correlation between the coefficient of peak discharge amplification and three dimensionless influencing factors, flume gradient, dimensionless volume, and dimensionless particle size, were comprehensively analyzed. An empirical formula for the coefficient of peak discharge amplification was proposed and verified based on 16 sets of experimental data. These preliminary results can provide a scientific reference for future research on disaster prevention and mitigation of mine waste debris flows.
出处 《山地科学学报:英文版》 SCIE CSCD 2019年第2期402-413,共12页 Journal of Mountain Science
基金 the financial support from the National Natural Science Foundation of China(Grant Nos.41790441,41877249 and 41402255) Shaanxi Natural Science Foundation Project(Grant No.2017JM4008).
作者简介 ZHU Xing-hua,e-mail:zhuxinghua@chd.edu.cn;CUI Yi-fei,e-mail:yifeicui@ust.hk;Corresponding author:PENG Jian-bing,e-mail:oldbig2130@163.com;JIANG Cheng,e-mail:1228384952@qq.com;GUO Wei-long,e-mail:756634350@qq.com
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