Research on deformation law of open-pit mine slopes under the influence of excavation disturbance
FEI Xiaoou;MIAO Haibin
为了探寻开挖扰动作用下露天矿边坡受断层破碎带影响的变形变化规律,综合考虑地层岩性、断层、开挖卸荷等因素的影响,基于相似理论建立了某露天矿边坡开挖物理模型,开展了不同开挖条件下物理模型的相似模拟实验。结果表明:岩体开挖会导致岩体应力重新分布,近坡面应力变化较大;开挖作用下位于断层构造带范围内的岩体表现出非整体移动,下盘岩体的垂直位移量较上盘岩体大,说明该处岩体在开挖扰动及上盘岩体自重力作用下有沿断层破碎带产生相对错动的趋势。
In order to explore the deformation and change law of open-pit slope affected by fault fracture zone under excavation disturbance, a physical model of open-pit slope excavation was established based on the similarity theory, and physical model simulation experiments were carried out under different excavation conditions, considering the influence of formation lithology, fault, excavation and unloading. The results show that the rock mass excavation will lead to the redistribution of rock mass stress, and the near-slope stress changes greatly. The rock mass in the fault tectonic zone shows non-integral movement under the action of excavation, and the vertical displacement of the lower wall rock mass is larger than that of the upper wall rock mass, which indicates that the rock mass in this area has a tendency to produce relative dislocation along the fault fracture zone under the action of excavation disturbance and self-gravity of the upper wall rock mass.
slope stability;excavation unloading;slope deformation;landslide;analogy simulation
主办单位:煤炭科学研究总院有限公司 中国煤炭学会学术期刊工作委员会