Stability Analysis of the Left Bank Slope of Baihetan Hydropower Station Based on the MF-DFA Method
Based on the left bank slope of Baihetan hydropower station in Southwestern China, a high-precision microseismic monitoring system was established. An early warning model of surrounding rock mass deformation and failure based on MF-DFA was proposed. The results showed that the multifractal character...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/8898318 |
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| author | Haoyu Mao Min Zhang Biao Li Nuwen Xu |
| author_facet | Haoyu Mao Min Zhang Biao Li Nuwen Xu |
| author_sort | Haoyu Mao |
| collection | DOAJ |
| description | Based on the left bank slope of Baihetan hydropower station in Southwestern China, a high-precision microseismic monitoring system was established. An early warning model of surrounding rock mass deformation and failure based on MF-DFA was proposed. The results showed that the multifractal characteristics of the microseismic and blasting waveform time series in the left bank slope were obvious, and the multifractal spectrum width of the blasting waveform is much larger than that of microseismic waveform. Before the slope cracks increased, the multifractal time-varying response characteristics of microseismic waveform showed strong regularity, which could be regarded as a precursor of surrounding rock mass deformation. Before the deformation and failure of surrounding rock mass, the multifractal spectrum width Δα showed an increasing trend while the multifractal spectrum of microseismic waveforms Δf(α) presented a decreasing trend, which can be regarded as a precursor of surrounding rock mass deformation; when deformation and failure occurred, Δα showed a decreasing trend and Δf(α) showed an increasing trend, which can be regarded as a deformation failure period; after the occurrence of deformation and failure, both Δα and Δf(α) showed a steady trend, and Δf(α) would approach to the zero line, which can be regarded as a stable period. |
| format | Article |
| id | doaj-art-e2ee1aea7bee48c6adcd17c78bdcd5a2 |
| institution | DOAJ |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
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| series | Advances in Civil Engineering |
| spelling | doaj-art-e2ee1aea7bee48c6adcd17c78bdcd5a22025-08-20T03:21:06ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/88983188898318Stability Analysis of the Left Bank Slope of Baihetan Hydropower Station Based on the MF-DFA MethodHaoyu Mao0Min Zhang1Biao Li2Nuwen Xu3State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower, Sichuan University, Chengdu, Sichuan 610065, ChinaState Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower, Sichuan University, Chengdu, Sichuan 610065, ChinaSchool of Geoscience and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, ChinaState Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower, Sichuan University, Chengdu, Sichuan 610065, ChinaBased on the left bank slope of Baihetan hydropower station in Southwestern China, a high-precision microseismic monitoring system was established. An early warning model of surrounding rock mass deformation and failure based on MF-DFA was proposed. The results showed that the multifractal characteristics of the microseismic and blasting waveform time series in the left bank slope were obvious, and the multifractal spectrum width of the blasting waveform is much larger than that of microseismic waveform. Before the slope cracks increased, the multifractal time-varying response characteristics of microseismic waveform showed strong regularity, which could be regarded as a precursor of surrounding rock mass deformation. Before the deformation and failure of surrounding rock mass, the multifractal spectrum width Δα showed an increasing trend while the multifractal spectrum of microseismic waveforms Δf(α) presented a decreasing trend, which can be regarded as a precursor of surrounding rock mass deformation; when deformation and failure occurred, Δα showed a decreasing trend and Δf(α) showed an increasing trend, which can be regarded as a deformation failure period; after the occurrence of deformation and failure, both Δα and Δf(α) showed a steady trend, and Δf(α) would approach to the zero line, which can be regarded as a stable period.http://dx.doi.org/10.1155/2020/8898318 |
| spellingShingle | Haoyu Mao Min Zhang Biao Li Nuwen Xu Stability Analysis of the Left Bank Slope of Baihetan Hydropower Station Based on the MF-DFA Method Advances in Civil Engineering |
| title | Stability Analysis of the Left Bank Slope of Baihetan Hydropower Station Based on the MF-DFA Method |
| title_full | Stability Analysis of the Left Bank Slope of Baihetan Hydropower Station Based on the MF-DFA Method |
| title_fullStr | Stability Analysis of the Left Bank Slope of Baihetan Hydropower Station Based on the MF-DFA Method |
| title_full_unstemmed | Stability Analysis of the Left Bank Slope of Baihetan Hydropower Station Based on the MF-DFA Method |
| title_short | Stability Analysis of the Left Bank Slope of Baihetan Hydropower Station Based on the MF-DFA Method |
| title_sort | stability analysis of the left bank slope of baihetan hydropower station based on the mf dfa method |
| url | http://dx.doi.org/10.1155/2020/8898318 |
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