首页|Erosion and transport mechanisms of mine waste along gullies

Erosion and transport mechanisms of mine waste along gullies

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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.

Mine wasteDebris flowErosion and transportLandslide damPeak discharge amplification

ZHU Xing-hua、CUI Yi-fei、PENG Jian-bing、JIANG Cheng、GUO Wei-long

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College of Geological Engineering and Surveying, Chang'an University, Xi'an 710054, China

Key Laboratory of Western China ineral Resources and Geological Engineering, Chang'an University, Xi'an 710054,China

Department of Civil and Environmental Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China

Shaanxi Institute of Engineering Prospecting Co.Ltd, Xi'an 710068, China

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authors acknowledge the financial support from the National Natural Science Foundation of Chinaauthors acknowledge the financial support from the National Natural Science Foundation of Chinaauthors acknowledge the financial support from the National Natural Science Foundation of ChinaShaanxi Natural Science Foundation ProjectFinally,the authors thank Dr.MA Penghui for his kind assistance with the flume experiments

4179044141877249414022552017JM4008

2019

山地科学学报(英文版)
中国科学院水利部成都山地灾害与环境研究所

山地科学学报(英文版)

CSTPCDCSCDSCI
影响因子:0.228
ISSN:1672-6316
年,卷(期):2019.16(2)
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