Operation Performance and Seepage Flow of Impervious Body in Blast-Fill Dams Using Discrete Element Method and Measured Data

Ma, Chunhui; Gao, Zhiyue; Yang, Jie; Cheng, Lin; Chen, Lei

doi:10.3390/w14091443

Cited by 5 publications

(3 citation statements)

References 33 publications

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“…In petroleum engineering, the compact rock around the underground oil and gas storage caverns is usually in the saturated status via carrying out artificial water injection to further rise the leakproofness of caverns, aiming for preventing the leakage of oil and gas [28][29][30][31]. For the water-sealed underground oil and gas storage caverns, when experiencing engineering activities such as excavation of caverns, etc., the coupling effect between seepage and stress fields of the saturated surrounding compact is inevitable to occur, which has a significant influence on the stability of underground storage caverns [32][33][34][35]. Thus, correct analysis of the stability for underground water-sealed oil and gas storage caverns during engineering activities with considering hydromechanics has remarkable meaning for maintaining the safety of engineering projects.…”

Section: Of 20mentioning

confidence: 99%

Analysis of the Hydromechanical Properties of Compact Sandstone and Engineering Application

Tang

Zhang

Wang

et al. 2023

Water

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The paper proposes a method to simulate the mechanical behavior of compact rock considering hydromechanics by combining physical experiments and numerical analysis. The effectiveness of the constructed method is validated by the comparison between the numerical and physical results of triaxial shear experiments on sandstone in seepage conditions. Based on the validated method, the stability of underground water-sealed oil and gas storage caverns in surrounding compact sandstone during excavation is analyzed. The main findings are as follows: The intrinsic permeability of compact sandstone has a power function relationship with the porosity; the combination of the porous media elastic model and the modified Drucker–Prager plasticity model can preciously represent the mechanical properties of compact sandstone; the proposed method can accurately replicate the hydromechanical response of compact sandstone in seepage conditions; the effects of hydromechanical effects have significant impacts on the stability of surround compact sandstone during the excavation of underground water sealed oil and gas storage caverns, which causes the obvious increase in stress, deformation and plastic deformation zones of the surrounding compact sandstone and remarkable decrease in the stability safety factor.

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Section: Of 20mentioning

confidence: 99%

Analysis of the Hydromechanical Properties of Compact Sandstone and Engineering Application

Tang

Zhang

Wang

et al. 2023

Water

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“…Tailing dams built using upstream construction methods are more prone to failure and are more susceptible to static and dynamic liquefaction. Chunhui Ma et al [20] pointed out that a reasonable construction schedule and flexible waterproof material are key features of impervious bodies for dams with significant deformation. When the dam deformation becomes stable, consideration should be given to secondary treatment of the impervious body to enhance dam safety.…”

Section: Introduction 1research Statusmentioning

confidence: 99%

Study of a Tailings Dam Failure Pattern and Post-Failure Effects under Flooding Conditions

Gao,

Liu,

et al. 2023

Water

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Tailings dams are structures that store both tailings and water, so almost all tailings dam accidents are water related. This paper investigates a tailings dam’s failure pattern and damage development under flood conditions by conducting a 1:100 large-scale tailings dam failure model test. It also simulates the tailings dam breach discharge process based on the breach mode using FLOW-3D software, and the extent of the impact of the dam failure debris flow downstream was derived. Dam failure tests show that the form of dam failure under flood conditions is seepage failure. The damage manifests itself in the form of flowing soil, which is broadly divided into two processes: the seepage stabilization phase and the flowing soil development damage phase. The dam failure test shows that the rate of rise in the height of the dam saturation line is faster and then slower. The order of the saturation line at the dam face is second-level sub-dam, third-level sub-dam, first-level sub-dam, and fourth-level sub-dam. The final failure of the tailings dam is the production of a breach at the top of the dam due to the development of the dam’s fluid damage zone to the dam top. The simulated dam breach release results show that by the time the dam breach fluid is released at 300 s, the area of over mud has reached 95,250 square meters. Local farmland and roads were submerged, and other facilities and buildings would be damaged to varying degrees. Based on the data from these studies, targeted measures for rectifying hidden dangers and preventing dam breaks from both technical and management aspects can be proposed for tailings dams.

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“…Leakage issues arising from surface cracks in concrete dams are typically averted through the application of polymer geomembranes or coating materials onto the dam's surface [18][19][20]. As per ICOLD Bulletin 135, approximately 400 dams worldwide have incorporated PVC geomembranes to mitigate seepage concerns [21].…”

Section: Introductionmentioning

confidence: 99%

Investigation on Hydraulic Fracturing and Flexible Anti-Hydrofracturing Solution for Xiaowan Arch Dam

Jia

Yang

et al. 2023

Applied Sciences

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Understanding hydraulic fracturing in concrete super-high arch dams is vital for the implementation of safety measures on the bearing surface. In this study, we conducted tests on hydraulic fracturing for the Xiaowan arch dam (294.5 m) to analyze concrete behavior at cracks under various stress conditions. The risk of hydraulic fracturing near the dam heel was identified without compressive stress. Addressing this, we propose a flexible anti-hydrofracturing system using GB sealing material and a spray polyurea coating. Simulation tests on three schemes: ‘3 mm GB plate + 4 mm polyurea’, ‘1 mm GB glue + 5 mm polyurea’, and ‘7 mm polyurea’ showed effective prevention of hydrofracturing at concrete crack openings of 5 mm, 8 mm, or 10 mm under 300 m water pressure. Field tests supported ‘3 mm GB plate + 4 mm polyurea’ and ‘7 mm polyurea’ as optimal solutions for dam sections. Implementation involves a protective block layout with ‘3 mm GB plate + 4 mm polyurea’ on blocks and ‘7 mm polyurea’ in interval zones and corners. Since 2008, maximum leakage, including rock foundation, has remained minimal at 2.78 L/s under regular water levels. These insights aid similar concrete dams in optimizing safety systems.

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Operation Performance and Seepage Flow of Impervious Body in Blast-Fill Dams Using Discrete Element Method and Measured Data

Cited by 5 publications

References 33 publications

Analysis of the Hydromechanical Properties of Compact Sandstone and Engineering Application

Analysis of the Hydromechanical Properties of Compact Sandstone and Engineering Application

Study of a Tailings Dam Failure Pattern and Post-Failure Effects under Flooding Conditions

Investigation on Hydraulic Fracturing and Flexible Anti-Hydrofracturing Solution for Xiaowan Arch Dam

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