Microseismic Monitoring of the Left Bank Slope at the Baihetan Hydropower Station, China

2016 ◽  
Vol 50 (1) ◽  
pp. 225-232 ◽  
Author(s):  
Feng Dai ◽  
Biao Li ◽  
Nuwen Xu ◽  
Guotao Meng ◽  
Jiayao Wu ◽  
...  
Keyword(s):  
Microseismic Monitoring ◽  
Hydropower Station ◽  
Left Bank ◽  
Bank Slope ◽  
Baihetan Hydropower Station

Sensor Network Optimal Design of Microseismic Monitoring System at the Left Slope of Jinping I Hydropower Station

2013 ◽  
Vol 353-356 ◽  
pp. 872-876 ◽  
Author(s):  
Gang He ◽  
Nu Wen Xu ◽  
Chun Sha ◽  
Li Tian
Keyword(s):  
Optimal Design ◽  
Monitoring System ◽  
Sensor Array ◽  
Sensor Arrays ◽  
Microseismic Monitoring ◽  
Hydropower Station ◽  
Left Bank ◽  
Rock Fracturing ◽  
Bank Slope ◽  
Jinping I Hydropower Station

In order to real time monitor and analyze the rock fracturing due to continuous construction and consolidation at the left slope of Jinping I hydropower station, southwest of China, a microseismic monitoring system was conducted and an optimal design for the sensor arrays was investigated. The sensor array was designed on the basis of P method and Powell algorithm. The artificial fixed blasting tests were applied to adjust the positioning accuracy of the monitoring system. The results show that the location error of seismic source is less than 12 m in the scope of the sensor array, which demonstrates the monitoring system has high positioning g accuracy. The contour of source location shows that the location errors near the main tunnels at the left bank slope is below 6 m. Signals from 689 microseismic events with moment magnitude ranging from -2.1 to -0.2 were recorded during the first year monitoring period from June 15, 2009. The spatial distribution of microseismicity can identify and delineate the potential failure at the left bank slope, which provides some references for the future excavation and consolidation of the hydropower station.

Microseismic monitoring of columnar jointed basalt fracture activity: a trial at the Baihetan Hydropower Station, China

2014 ◽  
Vol 18 (4) ◽  
pp. 773-793 ◽  
Author(s):  
Bing-Rui Chen ◽  
Qing-Peng Li ◽  
Xia-Ting Feng ◽  
Ya-Xun Xiao ◽  
Guang-Liang Feng ◽  
...  
Keyword(s):  
Microseismic Monitoring ◽  
Hydropower Station ◽  
Columnar Jointed Basalt ◽  
Baihetan Hydropower Station

scholarly journals Deformation Analysis of Large-Scale Rock Slopes Considering the Effect of Microseismic Events

2019 ◽  
Vol 9 (16) ◽  
pp. 3409 ◽  
Author(s):  
Linlu Dong ◽  
Ying Yang ◽  
Bo Qian ◽  
Yaosheng Tan ◽  
Hailong Sun ◽  
...  
Keyword(s):  
Large Scale ◽  
Rock Fracture ◽  
Three Dimensional ◽  
Seismic Source ◽  
Microseismic Monitoring ◽  
Deformation Analysis ◽  
Left Bank ◽  
Exploratory Research ◽  
Rock Slopes ◽  
Bank Slope

To research the macroscopic deformation of rock microseismic damage, a high-precision microseismic monitoring system was established on the left bank slope of the Baihetan hydropower station in Southwestern China. Based on the microseismic monitoring and field deformation data, the seismic source radius was applied to characterize the rock fracture scale. Numerical simulations introduced the rock micro-fracture information into the three-dimensional numerical model of the left bank slope and established the damage constitutive model. The unloading deformation process of the left bank abutment rock mass is described by numerical calculations. The feedback analysis method considering the effect of microseismic damage is preliminary exploratory research, which provides a new idea for the stability analysis of similar high rock slopes.

scholarly journals Integrated Analysis of the Formation Mechanism of Cracks in a Concrete Dam Using Microseismic Monitoring and Numerical Simulation

2016 ◽  
Vol 2016 ◽  
pp. 1-11
Author(s):  
Gang He ◽  
Biao Li ◽  
Xuben Wang ◽  
Nuwen Xu
Keyword(s):  
Potential Risk ◽  
Microseismic Monitoring ◽  
Gravity Dam ◽  
Hydropower Station ◽  
Integrated Analysis ◽  
Left Bank ◽  
Concrete Gravity Dam ◽  
Simulation Results ◽  
The Right ◽  
Evolution Trend

The dam of Guanyinyan hydropower station is composed of a concrete gravity dam in the left bank and a rockfill dam in the right bank. During the operation of the hydropower station, several surface cracks occurred in the concrete gravity dam, which threatened the stability of the dam. To evaluate the evolution trend of the cracks and forecast the potential risk of the dam, the microseismic (MS) monitoring technique and finite-element method were used. First, the concrete three-point bending field test was performed to prove the reliability of the MS technique in monitoring the concrete cracks. The MS monitoring results were consistent with the simulation results. Then, the MS monitoring system was installed in the dam body. By analysing the MS activities before and after the impoundment, the evolution trend of the cracks and potential risk of the dam were evaluated and forecasted. The simulation results were also consistent with the monitoring results. These results can provide significant references for the operation safety of the dam and also present a new thought for the risk evaluation of similar dam engineering.

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