矿山边坡动力增载位移响应比评价参数研究  

Research on evaluation parameters of dynamic loading displacement response ratio of mine slope

作　　者：吴丽丽 包放歌 贺可强[1] Wu Lili;Bao Fangge;He Keqiang(School of Civil Engineering,Qingdao University of Technology,Qingdao 266033,Shandong;Shandong Institute of Architectural Design Co.,Ltd.,China Railway First Survey and Design Institute Group Co.,Ltd.,Qingdao 266034,Shandong)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033 [2]中铁一院集团山东建筑设计院有限公司,山东青岛266034

出　　处：《工程建设》2020年第11期1-6,共6页Engineering Construction

基　　金：国家自然科学基金资助项目(41372297);山东省自然科学基金项目(ZR2017PD011)。

摘　　要：为了探究矿山边坡开挖过程中的稳定性规律,将边坡开挖过程中的卸荷作用和外界扰动作用作为荷载增加效应,由该效应产生的变形作为位移响应,提出动力增载位移响应比参数η,构建预测模型。以甘肃省金川集团的石英石露天矿作为原型,采用Midas GTS有限元分析软件构建数值模型,分析矿山边坡在开挖过程中监测孔的η值变化规律及其与Fs之间的关系。结果表明:4-C监测孔处的η曲线值先在1.0上下波动,随后出现突增现象但未超出预警值7.67;2-C监测孔处的η曲线值与4-C监测孔处的规律相似,并且两处监测孔的η变化规律与数值模拟中的Fs之间成对立关系。因此,可以认为本文建立的矿山边坡动力增载位移响应比预测模型能对边坡开挖过程中的稳定性进行预测与评价。In order to explore the stability law of mine slope excavation process,the unloading effect and external disturbance effect in the process of slope excavation are taken as the load increasing effect,and the deformation produced by the effect is taken as the displacement response. The parameter η of dynamic load increase displacement response ratio is proposed,and then the prediction model is constructed. At the same time,taking the quartz open-pit mine of Jinchuan group in Gansu province as the prototype,and using Midas GTS finite element analysis software to build a numerical model,the variation law of η value of monitoring hole during the excavation of mine slope and the relationships with Fs are analyzed. The results show that the η curve value at 4-C monitoring hole first fluctuates up and down at 1.0,then it suddenly increases,but it does not exceed the warning value of 7.67;the η curve value at 2-C monitoring hole is similar to that of 4-C monitoring hole,and the change law of η of two monitoring holes is in opposition to the F_s in numerical simulation. Therefore,it can be considered that the dynamic loading displacement response ratio prediction model established in this paper can predict and evaluate the stability of the slope during excavation.

关 键 词：矿山边坡 动力增载位移响应比 边坡稳定性 

分 类 号：TD804[矿业工程—矿山开采]