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首页> 外文期刊>International journal of geomechanics >Numerical Simulation Analysis of Reservoir Bank Fractured Rock-Slope Deformation and Failure Processes
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Numerical Simulation Analysis of Reservoir Bank Fractured Rock-Slope Deformation and Failure Processes

机译：库岸裂缝性岩质边坡变形破坏过程的数值模拟分析

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摘要

The fluctuations of reservoir water levels significantly change the hydrogeological conditions of reservoir banks and thus affect the steady state of the bank slope. Reservoir landslide stability is governed by the complex interactions between the rock and the water (both reservoir and pore water). This paper establishes the constitutive coupled model of seepage and stress field for the E20 bank slope in the Haizhou Open Pit Coal Mine hydropower station's lower reservoir. Using the geotechnical engineering three-dimensional fast Lagrangian analysis of continua (FLAC-3D 4.0) program as a computational analysis tool, the E20 bank slope deformation mechanism was analyzed. The simulation model, calculated by using the Boit consolidation and pore-water continuity principles, was built using FEMs. The numerical simulation results showed that cyclical fluctuations and speeds of the reservoir's water level affect its bank slope stability. When the water level drops at a speed of 12 m/day, the simulation's calculated safety factor value is 0.99, but when the water level rises at a speed of 12 m/day, the calculated safety factor value is 1.03. The results demonstrated that the rapid drop of the water level had a greater impact on the reservoir bank slope stability than the rapid rise of the water level under the same conditions.
机译：水库水位的波动极大地改变了库岸的水文地质条件，从而影响了岸坡的稳定状态。水库滑坡的稳定性取决于岩石和水（水库和孔隙水）之间复杂的相互作用。本文建立了海州露天煤矿水电站下水库E20岸坡渗流与应力场的本构关系模型。以岩土工程连续性三维快速拉格朗日分析法（FLAC-3D 4.0）作为计算分析工具，对E20岸坡变形机理进行了分析。使用有限元法建立了利用Boit固结和孔隙水连续性原理计算的仿真模型。数值模拟结果表明，水库水位的周期性波动和速度会影响其岸坡的稳定性。当水位以12 m / day的速度下降时，模拟的计算安全系数值为0.99，但是当水位以12 m / day的速度上升时，计算的安全系数值为1.03。结果表明，在相同条件下，水位的快速下降对库岸边坡稳定性的影响大于水位的快速上升。

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