Dynamic response characteristics of a tailing dam determined by shaking-table tests
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ORIGINAL PAPER
Dynamic response characteristics of a tailing dam determined by shaking-table tests Jiaxu Jin 1 & Qianshen Ding 1 & Hongzhi Cui 1,2
&
Pingyi Zhang 1 & Xiaochun Xiao 3 & Xiangfeng Lv 4
Received: 4 December 2019 / Accepted: 20 August 2020 # Saudi Society for Geosciences 2020
Abstract Upstream tailing dams, which are commonplace, can easily lead to major accidents under seismic excitation. However, the dynamic response characteristics and causes of instability failure of tailings dams are yet to be investigated fully. In the present study, shaking-table tests were conducted to determine the acceleration, pore pressure, soil pressure, and displacement of a dam body under a seismic wave with different values of the PGA peak ground acceleration. The peak acceleration of the dam exhibited the typical spatial effect. Because of the increased shear strain of the tailings in the dam, reduced stiffness, and increased damping, the acceleration amplification factor increased with increasing elevation and decreased with increasing PGA (peak ground acceleration. The free face of the dam underwent liquefaction more easily, and the pore pressure of the dam exhibited three phases over time, namely rapid increase, sharp decrease, and then slow dissipation. The soil pressure also exhibited three phases over time, namely slow increase, rapid increase, and peak fluctuation. Once the pore pressure had dissipated, the soil pressure exhibited an inflection point at Arias intensity release. The vertical displacement of the dam increased gradually, but it is less than horizontal displacement. The pore pressure, soil pressure, and displacement were closely related to the Arias intensity. The present results have practical importance for understanding the instability of dams and reinforcement under seismic effects. Keywords Tailings dam . Shaking table test . Dynamic response . Unstable failure . Arias intensity
Introduction China is rich in mineral resources, the mining of which provides an important source of materials and energy for economic development. However, this mineral processing generates a large amount of solid waste, known as tailings. Apart from a
Responsible Editor: Zeynal Abiddin Erguler * Hongzhi Cui [email protected] * Xiangfeng Lv [email protected] 1
School of Civil Engineering, Liaoning Technical University, Fuxin 123000, Liaoning Province, China
2
College of Civil and Transportation Engineering, Hohai University, Nanjing, Jiangsu Province 210000, China
3
School of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, China
4
School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
few comprehensive utilization methods, most tailings are stored in tailing reservoirs to minimize environmental hazards and for possible future use. However, tailing reservoirs are among the major sources of man-made landslides, ranking 18th among international disaster accidents (Sun et al. 2012; Yu et al. 2014) and posing a serio
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