Study on crack formation and propagation in the galleries of the Dagangshan high arch dam in Southwest China based on microseismic monitoring and numerical simulation

Zhuang, Duanyang; Ma, Keping; Tang, Chun’an; Cui, Xin; Yang, G.

doi:10.1016/j.ijrmms.2018.11.016

Cited by 32 publications

(11 citation statements)

References 53 publications

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“…For technical details on determining the maximum energy density, readers can refer to the studies of Ma et al. (2017) and Zhuang et al. (2019).…”

Section: Right Bank Slope Of Xiluodu Hydropower Stationmentioning

confidence: 99%

Stability analysis of Xiluodu Hydropower Station right bank slope based on discontinuous deformation analysis method

Liu

et al. 2022

Self Cite

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PurposeThe purpose of this study is to investigate the deformation characteristics and failure modes of the right bank slope of Xiluodu Hydropower Station after excavation.Design/methodology/approachMicro-seismic monitoring technology is applied to obtain the microfracture information and study the internal damage evolution law of the slope rock mass. A numerical model for discontinuous deformation analysis (DDA) is established to analyse the deformation characteristics and failure mode of the slope. Micro-seismic monitoring and DDA can verify and supplement each other's results in the investigation of slope failure.FindingsThe results show that the slope has a downhill displacement along the weathered zone under natural conditions; the maximum resultant displacement at the monitoring point is 380 mm. The micro-seismic events are concentrated in an area located 30–100 m horizontally away from the slope surface and at an elevation of 390–470 m. The distribution of these micro-seismic events is consistent with the location of the unloading and weathered zones; it is the same as the DDA simulation result.Originality/valueThe study is anticipated to be used as reference for the stability analysis of rock slopes. By combining the continuous (micro-seismic monitoring technology) and discontinuous (DDA) methods, the entire process starting from the gradual accumulation of internal rock micro-damage to the macroscopic discontinuous deformation and failure of the slope can be investigated.

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“…For technical details on determining the maximum energy density, readers can refer to the studies of Ma et al. (2017) and Zhuang et al. (2019).…”

Section: Right Bank Slope Of Xiluodu Hydropower Stationmentioning

confidence: 99%

Stability analysis of Xiluodu Hydropower Station right bank slope based on discontinuous deformation analysis method

Liu

et al. 2022

Self Cite

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“…MS monitoring, as an important and commonly used geophysical method, has been applied in many fields, such as earthquakes [1][2][3][4][5], hydropower stations [6][7][8], metal mines [9][10][11][12], tunnels [13,14], petroleum engineering projects [15,16], hydraulic or pneumatic fracturing [17][18][19], and coal mines [20][21][22][23]. MS has achieved good results.…”

Section: Introductionmentioning

confidence: 99%

Microseismic Signals in Heading Face of Tengdong Coal Mine and Their Application for Rock Burst Monitoring

Ren

Zhang

et al. 2021

Shock and Vibration

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Microseismic (MS) monitoring is an important and commonly used geophysical method in coal mines to predict rock burst which has great influence on safety production. MS monitoring technology and analysis method of the whole mine or working face have been matured, but its use in heading faces of coal mine is not mature due to small disturbances and narrow layout spaces. To carry out MS monitoring and early warning in the heading face, signal recognition must be adequately performed first, and monitoring objects and indicators must be obtained. Through field tests of MS systems at the 117 track gateway of Tengdong coal mine, interference signals of equipment operation and effective signals of coal vibration are accurately collected. After analysis, the waveform characteristics, spectrum, and propagation distance of the interference signals and coal vibration signal are different. Some effective signals with small energy (one-channel triggering) cannot be used as early warning indicators because they are concealed by interference signals. Through trial operation, it is found that large energy (three-channel and four-channel triggering) coal vibration events successfully predicted a rock burst. The MS system of 117 track gateway of Tengdong coal mine should be able to remove the interference signals in real time through the algorithm and take the number of large energy coal vibration signal rather than all coal vibration events as the predictor for rock burst risk monitoring.

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“…Arch dams are built on the major river tracks as such locations have demonstrated great merit and susceptibility to bear the forces acting on the upstream face of the dam. Besides, arch dam has a high operational efficiency compared to other dam types [13,14]. On the other hand, the choice of dam construction location became suitable for high altitude to meet the hydropower energy requirements.Dam is considered as a shell structure that is arched both longitudinally and transversely.…”

Section: Introductionmentioning

confidence: 99%

Effect of Crest Shape on the Structural Performance of the Double Curvature Concrete Dam

Khassaf¹

2021

GEOMATE

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Arch dam stability is one of the main engineering challenges that must be met in the early stages of investigations and design of the dam. The highest degree of stability can be achieved if the dam 's structure formed in best layouts and the free ends of the dam body, defined by the crest, restricts especially if the dam is affected seismically. This research study falls under the auspices of the second phase of concrete dam construction, i.e. design stage. Nonlinear finite element analysis is performed in order to investigate the structural behaviors of the four models of double curvature concrete arch dam. Three-dimensional models of arch dams are prepared to utilizing Revit, the building information modeling software. Subsequently, the four models are linked to the finite element's tools package of Abaqus 6.13 for the purposes of discretization and structural analyses. The models have the same mechanical properties and basic dimensions and differ only in the form and physical appearance of a crest (crest shape). Amplified of crest shape caused a slight movement of the dam center of the mass to be optimally positioned, and thus the new center of mass supports the stability of the dam. The varying effects of crest configurations on the whole dam structure response were discovered according to the results of maximum and minimum principal stresses along the crown cantilever path as well as to the displacements response along the crest path of the arch dam. Strengthening or amplified crest dimensions could decrease arch dam thickness for a certain value and can reduce the response of the displacement to about 30 percent. The results indicated a reduction in the undesired movement between the adjacent cantilevers at the contraction joint zone, so a marvelous response was remarked in both of triangle upward edges crest and triangle downward edges crest models.

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Study on crack formation and propagation in the galleries of the Dagangshan high arch dam in Southwest China based on microseismic monitoring and numerical simulation

Cited by 32 publications

References 53 publications

Stability analysis of Xiluodu Hydropower Station right bank slope based on discontinuous deformation analysis method

Stability analysis of Xiluodu Hydropower Station right bank slope based on discontinuous deformation analysis method

Microseismic Signals in Heading Face of Tengdong Coal Mine and Their Application for Rock Burst Monitoring

Effect of Crest Shape on the Structural Performance of the Double Curvature Concrete Dam

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