Vol18 No.5: 1391-1403
【Title】The collision experiment between rolling stones of different shapes and protective cushion in open-pit mines
【Author】ZHU Chun1,2,3,4; HE Man-chao3*; KARAKUS Murat4; ZHANG Xiao-hu3*; GUO Zhen5
【Addresses】1 School of Earth Sciences and Engineering, Hohai University, Nanjing 210098, China; 2 Engineering Research Center of Development and Management for Low to Ultra-Low Permeability Oil & Gas Reservoirs in West China, Ministry of Education, Xi'an Shiyou University, Xi'an 710021, China; 3 State Key Laboratory for Geomechanics & Deep Underground Engineering, Beijing 100083, China; 4 School of Civil, Environmental and Mining Engineering, The University of Adelaide, Adelaide SA 5005, Australia; 5 College of Civil Engineering, Tongji University, Shanghai 200092, China
【Corresponding author】ZHANG Xiao-hu
【Citation】Zhu C, He MC, Karakus M, et al. (2021) Research on the collision experiment between rolling stones of different shapes and protective cushion in open-pit mines. Journal of Mountain Science 18(5). https://doi.org/10.1007/s11629-020-6380-0
【Abstract】Though gravel cushions are used worldwide in open-pit mines and railway slopes to control the impact of rolling stones, no universal technical standards have been put in place to guide engineers in their correct design, and few laboratory test results are available with which to characterize collisions between rolling stones and a gravel cushion. We carried out a large number of experiments in which rolling stones made of the same material but differently shaped were dropped from various heights onto cushions with various particle sizes and thicknesses. We investigated the characteristics of the resulting collisions, and the relationships between coefficients of restitution (CORs)of blocks with different shape and release height H, cushion thickness h and particle diameter d are obtained through linear fitting method. Orthogonal testing reveals the relative influence of block shape, release height, and the particle size and thickness of the cushion on the collision characteristics, which can assist engineers in designing a gravel cushion suitable to the distribution and weathering characteristics of rolling stones in a specific area.
【Keywords】Coefficient of restitution (COR); Collision characteristics; Gravel cushion; Rolling stone shape