Formation and evolution characteristics of dam breach and tailings flow from dam failure: an experimental study

Tian, Sen; Dai, Xuanyan; Wang, Guangjin; Lu, Yiyu; Chen, Jie

doi:10.1007/s11069-021-04649-1

Cited by 22 publications

(9 citation statements)

References 52 publications

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“…The industrial camera recorded in real-time images during the lifting process. The raw tailings were used as the test material, with a dry density of 1.92 g/cm 3 and a moisture content of 12.3%. The particle composition is shown in Table 1.…”

Section: Experimental Designmentioning

confidence: 99%

Study on fracture development and progressive failure characteristics of downstream dam-type expansion tailings reservoir

Zhang

Jin

Xu³

2022

Sci Rep

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With the economic development and industrialization, the increasingly accumulated tailings ponds in China have become a great risk. Due to the difficulty of selecting proper site for a new reservoir in Yunnan, a sub-dam was built at the downstream original reservoir. This study explored the fracture development and progressive failure characteristics of the tailings reservoir area after capacity expansion based on a similarity experiment and the numerical simulation. The results showed that the primary cracks in the reservoir area were more than those at the top of the sub-dam. With the increase of the upper load, the primary cracks further developed and penetrated the whole sub-dam top, and the sub-cracks were then produced under the concentrate stress of the primary cracks. After the further development of the sub-cracks, the secondary cracks parallel to the primary cracks were formed on the outer slope of the sub-dam. The progressive failure of a tailings dam can be summarized as: the maximum shear stress was firstly generated at the toe of the slope or the top of the dam which then extended to the top of the sub-dam in the form of a curve and finally formed the failure surface by connecting with the primary fracture of the tensile plastic zone at the top of the dam. The study also found that in the process of tailings accumulation in the new reservoir area, tailings would form "back pressure slope protection" at the initial dam of the original reservoir, which not only effectively delayed the occurrence of shear failure, but also inhibited the generation and penetration of tensile plastic zone.

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Section: Experimental Designmentioning

confidence: 99%

Study on fracture development and progressive failure characteristics of downstream dam-type expansion tailings reservoir

Zhang

Jin

Xu³

2022

Sci Rep

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“…A tailings impoundment failure would not only destroy the mine infrastructure, but the spilled tailings would also lead to serious damage to the surrounding ecological environment (He et al, 2019;He et al, 2012;Salam et al, 2021;Zhang and Zhang, 2022). Secondary disasters such as landslides, floods, and debris flows will occur if the tailings dam fails (Tian et al, 2021;Wu and Qin, 2018;Xu et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

The stability of dams with different stoping elevations in Tongling valley type tailings impoundment: A case study in Yunnan China

Wang

Zuo

et al. 2022

Preprint

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Significant interest has been focused on recovery rates, recovery options, and recovery utilization when tailings impoundments are re-mined. However, the stability of the tailings dams during the recovery process is also a severe issue. Based on engineering geological survey and laboratory tests, the Tongling tailings impoundment’s characteristics of instability evolution under different recovery heights and diverse working conditions were analyzed by numerical simulation. Firstly, with the help of 2D software, the position of the tailings dam infiltration line and the alteration of the dam safety factor during the stoping process were calculated. Secondly, 3Dmine software was used to create the 3D surface structure of the tailings impoundment, and then a 3D numerical analysis model was established by means of Midas GTS NX software. The numerical simulation of seepage and stress analyses were conducted based on the model. Consequently, the evolution of the stability characteristics of tailings dam under different operating conditions was calculated. The research demonstrates that the dry beach length of the tailings pond gradually reduces with the decrease of the extraction height, resulting in a lower infiltration line. Under flood conditions, the saturation line has partial overflow due to the poor seepage discharge capacity of the dam. The total displacement of the dam body is inversely proportional to the retrieval height. The more extreme the analyzed working conditions, the more the safety factor will be reduced. Additionally, the plastic variation area of the dam body will be more comprehensive, which will increase the risk of a dam collapse.

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“…Unlike the detailed simulation, Alhasan et al (2015) [36] proposed a conceptual model, simplified the three-dimensional problem to a one-dimensional problem, and successfully compared the results with field observations. To simulate the horizontal expansion of the dam breach, Tian et al (2021) [37] proposed a model to combine a theory of sediment transport for vertical incision and a horizontal expansion model based on geotechnical theory. Similarly, the framework proposed in this research is based on the simplified analytical dam breach model by Capart (2013) [38].…”

Section: Introductionmentioning

confidence: 99%

Soil-Water Conservation, Erosion, and Landslide

2022

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Formation and evolution characteristics of dam breach and tailings flow from dam failure: an experimental study

Cited by 22 publications

References 52 publications

Study on fracture development and progressive failure characteristics of downstream dam-type expansion tailings reservoir

Study on fracture development and progressive failure characteristics of downstream dam-type expansion tailings reservoir

The stability of dams with different stoping elevations in Tongling valley type tailings impoundment: A case study in Yunnan China

Soil-Water Conservation, Erosion, and Landslide

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