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采用Hoek-Brown准则,分析三维边坡在开挖扰动下的变形稳定性。以某露天矿边坡为工程背景,利用快速拉格朗日差分法(FLAC3D)建立三维数值分析模型,并在边坡中布置若干监测点,利用FISH语言编制相应位移插值程序,探讨边坡开挖引起的动静态位移响应,从宏观角度揭示出边坡开挖后,不同区域的变形,为工程实践提供指导;介绍了强度折减技术在Hoek-Brown准则中的实施方法,采用计算不收敛失稳判据,计算边坡安全系数,从而进一步推广Hoek-Brown强度折减法在三维边坡稳定性分析中的应用。
The Hoek-Brown criterion is used to analyze the deformation stability of three-dimensional slope under disturbances of excavation. Taking the open pit slope as the engineering background, the fast Lagrangian difference method (FLAC3D) is used to establish the three-dimensional numerical analysis model. Several monitoring points are arranged in the slope, and the corresponding displacement interpolation program is compiled by FISH language to discuss the slope opening Excavation-induced dynamic and static displacement response, reveals the deformation of different areas after the excavation of the slope from a macroscopic perspective, and provides guidance for engineering practice. The paper introduces the implementation method of the strength reduction technique in the Hoek-Brown criterion, Instability criterion to calculate the slope safety factor, so as to further promote the application of the Hoek-Brown strength reduction method in the stability analysis of three-dimensional slope.