开挖扰动影响下露天矿边坡变形规律研究  

Research on deformation law of open-pit mine slopes under the influence of excavation disturbance

作　　者：费晓欧 缪海宾 FEI Xiaoou;MIAO Haibin(School of Civil Engineering,Liaoning Petrochemical University,Fushun 113001,China;China Coal Technology and Engineering Group Shenyang Research Institute,Fushun 113122,China;State Key Laboratory of Coal Mine Safety Technology,Fushun 113122,China)

机构地区：[1]辽宁石油化工大学土木工程学院,辽宁抚顺113001 [2]中煤科工集团沈阳研究院有限公司,辽宁抚顺113122 [3]煤矿安全技术国家重点实验室,辽宁抚顺113122

出　　处：《煤矿安全》2024年第8期153-158,共6页Safety in Coal Mines

基　　金：国家重点研发计划资助项目(2021YFC3001901)。

摘　　要：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.

关 键 词：边坡稳定性 开挖卸荷 坡体变形 滑坡 相似模拟 

分 类 号：TD824.7[矿业工程—煤矿开采]