Citation

Wang L, Zhao G, Liu X, Zhao N, Li X. China Saf. Sci. J. 2022; 32(4): 36-43.

Copyright

(Copyright © 2022, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2022.04.006

PMID

unavailable

Abstract

In order to analyze influence of asperity shapes on sliding stability of sandstones, a sliding friction test was performed on a self⁃made device. With asperity shapes of sandstone surface being considered as a regular polygon and asperity shape coefficient being introduced, a prediction model for friction coefficients of sandstone joints, including asperities, was proposed. The results indicate that along with increase in asperity ' s length, friction coefficients gradually decrease, and their variation range becomes narrower. When the length is constant, friction coefficients gradually decrease with the increase of asperity shape coefficient. And in the case of constant asperity shape coefficient, friction coefficients gradually decrease with increase of length. The predicted friction coefficient is in good agreement with test value when the length is between 2-5 mm. © 2020 China Safety Science Journal. All rights reserved.

Language: zh