Stabilization of a potentially unstable rock mass at the construction site of the Sayano-Shushenskoe hydroelectric station

1992 ◽  
Vol 26 (1) ◽  
pp. 34-38 ◽  
Author(s):  
V. N. Zhivoderov
Keyword(s):  
Rock Mass ◽  
Hydroelectric Station ◽  
Construction Site ◽  
Unstable Rock

Analysis of Unstable Rock-Mass Stability Based on Limit Equilibrium Method and Strength Reduction Method

2016 ◽  
Vol 858 ◽  
pp. 73-80
Author(s):  
Ying Kong ◽  
Hua Peng Shi ◽  
Hong Ming Yu
Keyword(s):  
Rock Mass ◽  
Failure Mode ◽  
Posterior Margin ◽  
Reduction Method ◽  
Limit Equilibrium ◽  
Limit Equilibrium Method ◽  
Strength Reduction ◽  
Strength Reduction Method ◽  
Rock Masses ◽  
Unstable Rock

With the slope unstable rock masses of a stope in Longsi mine, Jiaozuo City, China as the target, we computed and analyzed the stability of unstable rock masses using a limit equilibrium method (LEM) and a discrete element strength reduction method (SRM). Results show that the unstable rock masses are currently stable. Under the external actions of natural weathering, rainfall and earthquake, unstable rock mass 1 was manifested as a shear slip failure mode, and its stability was controlled jointly by bedding-plane and posterior-margin steep inclined joints. In comparison, unstable rock mass 2 was manifested as a tensile-crack toppling failure mode, and its stability was controlled by the perforation of posterior-margin joints. From the results of the 2 methods we find the safety factor determined from SRM is larger, but not significantly, than that from LEM, and SRM can simulate the progressive failure process of unstable rock masses. SRM also provides information about forces and deformation (e.g. stress-strain, and displacement) and more efficiently visualizes the parts at the slope that are susceptible to instability, suggesting SRM can be used as a supplementation of LEM.

scholarly journals Chasing a hidden fracture using seismic refraction tomography: case study Preonzo, Switzerland

2020 ◽  
Author(s):  
Mauro Häusler ◽  
Franziska Glüer ◽  
Jan Burjánek ◽  
Donat Fäh
Keyword(s):  
Rock Mass ◽  
Seismic Refraction ◽  
Slope Instability ◽  
Mode Analysis ◽  
Mode Shapes ◽  
Small Aperture ◽  
Higher Modes ◽  
Refraction Tomography ◽  
Tension Cracks ◽  
Unstable Rock

<p>The Preonzo rock slope instability in southern Switzerland partly collapsed in 2012, releasing a volume of ~210’000 m3 and leaving behind an unstable rock mass of about 140’000 m3. Shortly after the collapse, a small-aperture seismic array measurement was performed on the remaining unstable volume. The analysis of these data showed a fundamental resonance frequency of about 3.5 Hz and strong wavefield amplifications with factors of more than 30 in direction perpendicular to open tension cracks. Normal mode analysis by frequency domain decomposition using the fundamental and several higher modes allowed for mapping the fracture network of the instability.<br>However, the observed amplification factors and mode shapes could not be explained solely by the open tension cracks visible at the surface. Strong amplifications, especially at frequencies of higher modes, were observed on the uphill part of the rear fracture, which was supposed to be outside the presumed unstable area. The zone where amplifications rapidly decreased in the uphill direction coincides roughly with a geomorphological lineament in the field, interpreted as an additional, but hidden, rear fracture. <br>We performed active seismic refraction tomography across this lineament and discovered distinct low velocity anomalies in the transition zone from high to low amplifications, supporting the interpretation of an additional fracture. Considering this new finding, the volume of the unstable rock mass increases by about 40 %. </p>

Mining and preparation of aggregates for concrete at the construction site of the Inguri hydroelectric station

1980 ◽  
Vol 14 (10) ◽  
pp. 997-1002
Author(s):  
G. G. Édiger ◽  
Yu. A. Bereznikov ◽  
Sh. D. Kiriya ◽  
N. A. Lobov
Keyword(s):  
Hydroelectric Station ◽  
Construction Site

Use of hydraulic mechanization for clearing away the gorge slopes at the construction site of the Toktogul hydroelectric station

1971 ◽  
Vol 5 (10) ◽  
pp. 908-912 ◽  
Author(s):  
G. G. Tatarov ◽  
D. V. Bushman
Keyword(s):  
Hydroelectric Station ◽  
Construction Site

Application of systems analysis in planning the construction site of the Boguchany hydroelectric station

1977 ◽  
Vol 11 (3) ◽  
pp. 237-241
Author(s):  
D. A. Ragozin ◽  
V. P. Smirnov
Keyword(s):  
Systems Analysis ◽  
Hydroelectric Station ◽  
Construction Site

Ice-thermal regime of the Angara river at the construction site of the Ust'-Ilimsk hydroelectric station

1972 ◽  
Vol 6 (3) ◽  
pp. 245-246 ◽  
Author(s):  
Ya. L. Gotlib ◽  
F. F. Razzorenov
Keyword(s):  
Thermal Regime ◽  
Hydroelectric Station ◽  
Construction Site

Study on the Deformation Mechanism of the Wangxia Unstable Rock Mass in the Three Gorges Reservoir

2014 ◽  
Vol 926-930 ◽  
pp. 635-639
Author(s):  
Qi Lang Le ◽  
You Long Gao ◽  
Zhong Lin Zhang ◽  
Ning Guo
Keyword(s):  
Rock Mass ◽  
Three Gorges Reservoir ◽  
Gradual Change ◽  
Three Gorges ◽  
Monitoring Methods ◽  
Local Resident ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
Gradual Process ◽  
Unstable Rock

Twice serious deformation occurred in the Wangxia unstable rock mass in 2010 and 2011 in Wushan country in the Three Gorges Reservoir. It formed a large dangerous factor for the local resident and channel safety. Based on the detailed investigation of the new cracks, deformation history, GPS observations, total station monitoring and crack displacement monitoring data analysis, analyzed comprehensively the deformation and reasons of the unstable rock. The researches show that the deformation type of the unstable rock mass contains gradual change and mutation, should adopt the corresponding monitoring methods and monitoring frequency in different deformation stages based on the geological survey and monitoring the key parts of the unstable rock mass. The destruction of the Wangxia unstable rock was a gradual process, controlled by 5 key cracks, which were crack T11, T12, T13, T16, and T10, consider the Wangxia unstable rock was subsided extrusion type collapse.

Control Function of Corrosion of Calcareous Sandstone over Rock Mass Quality in One Hydroelectric Station on the Jinsha River

2014 ◽  
Vol 580-583 ◽  
pp. 847-850
Author(s):  
Shu Qiang Lu ◽  
Peng Zhu
Keyword(s):  
Rock Mass ◽  
Control Function ◽  
Electrical Power ◽  
Hydroelectric Station ◽  
Power Station ◽  
Jinsha River ◽  
Rock Mass Quality ◽  
Quality Classification ◽  
Electrical Power Station ◽  
Rock Mass Quality Classification

The hydro-electrical power station is planned to be built on the Jinsha River. The regional geologic structure is complex. On the basis of the geological engineering conditions and rock mass quality classification, the change of wave velocity of rock mass is used to analyze systematically the control function of corrosion of calcareous sandstone over rock mass quality. The modificatory standard of rock mass quality classification and the system of rock mass quality classification in the hydroelectric station have been carried out. The main results can be taken as the basic data and the theoretical proofs to evaluate the engineering rock mass stability.

Adjustment and operation of the continuous concrete plant at the construction site of the Sayano-Shushenskoe hydroelectric station

1981 ◽  
Vol 15 (4) ◽  
pp. 217-222
Author(s):  
N. A. Zinchenko ◽  
V. A. Ryzhkov ◽  
Yu. M. Gorbunov
Keyword(s):  
Hydroelectric Station ◽  
Construction Site
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