Citation

Cai H, Wu S, Wu D, Jing X, Wang W, Kang Q. China Saf. Sci. J. 2020; 30(11): 162-167.

Copyright

(Copyright © 2020, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2020.11.024

PMID

unavailable

Abstract

In order to explore gradual failure and erosion characteristics of overtop of tailing dam, a tailing erosion test device under sand flow was developed based on dynamic theory of sediment. Then, height change of tailing sample before and after erosion was observed with horizontal pipe made of transparent acrylic plate, and water flow was continuously changed through frequency converter. Meanwhile, erosion height and time of sample before and after erosion were recorded with Vernier caliper and high-speed camera. Finally, erosion rate of tailings with different mass fraction (0%, 3%, 6%, 9%) was measured with test device, and erosion characteristics of sand bearing water flow and velocity on tailings were analyzed. The results show that erosion rate of tailings reaches its maximum under action of clean water, and it will decrease along with increase of sand content in water flow. This conclusion is consistent with previous research results, which verifies feasibility and effectiveness of the test device. © 2020 China Safety Science Journal

Language: zh