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为揭示露天矿含斜交断层顺倾层状边坡的变形破坏规律及其力学成因机制、明确断层对边坡变形与稳定性的影响,以元宝山露天煤矿东帮边坡为工程背景,应用有限差分软件FLAC3D,基于强度折减理论,对含斜交断层顺倾层状边坡稳定性进行了三维数值模拟。结果表明:元宝山露天矿东帮边坡的滑坡模式为以4#弱层为底界面、以断层面与椭球面相交形成的不规则曲面为侧界面的切层-顺层滑动;边坡整体稳定性较好,其滑坡的力学成因机制类型为推动式;多个顺倾弱层对边坡变形具有叠加效应,而斜交断层的切割会一定程度上削弱弱层对边坡变形的控制作用。
In order to reveal the deformation and failure mechanism and mechano-genesis mechanism of the inclined strata layered slope in open-pit mine, the influence of faults on the deformation and stability of the slope is clarified. Taking the east slope of the open pit coal mine in the Baobaoshan project as an example, The finite difference software FLAC3D, based on the strength reduction theory, conducts a three-dimensional numerical simulation of the bedding slope stability of the inclined fault. The results show that the landslide model of the eastern slope of the Yuanbaoshan open-pit mine is a 4 ~ weak layer as the bottom interface, and the irregular surface formed by the intersection of the fault surface and the ellipsoid surface is the slice-bedding slide of the lateral interface. The whole slope The stability is better and the mechanical mechanism of the landslide is push type. The multiple deformation layers have the superposition effect on the deformation of the slope, while the cutting of the bias crossing faults will weaken the control effect of the weak layer to the deformation of the slope .