高速公路压覆矿体开采地表变形预测

Prediction of surface deformation of overburden orebody mining on expressway

为分析研究高速公路压覆矿体开采对高速公路的影响,采用概率积分法理论计算预测地表移动变形值,并利用3DMine、Midas、FLAC^(3D)等软件,对盘龙铅锌矿矿区高速公路的压覆矿体开采造成的地表移动变形进行数值模拟研究,综合分析理论计算与数值模拟结果,从而判断压覆矿体开采是否会使高速公路发生破坏。研究表明:地表发生最大沉降位移处位于6~10线开采中心正上方;数值模拟与理论计算得出的地表最大倾斜值、最大曲率值、最大水平变形值均满足规程要求,高速公路未发生破坏。

In order to analyze and study the influence of the mining of the overburdened ore body of the expressway on the expressway,the probability integral method was used to calculate and predict the surface movement and deformation value,and the 3DMine,Midas,FLAC^(3D) and other software were used to carry out the numerical simulation research on the surface movement and deformation caused by the mining of the overburdened ore body of the expressway in Panlong lead zinc mine area,and the theoretical calculation and numerical simulation results were comprehensively analyzed,so as to judge whether the mining of overburden ore body will cause the damage of expressway.The results showed that the maximum settlement displacement of the surface was directly above the mining center of line 6-10;the maximum slope value,maximum curvature value and maximum horizontal deformation value of the surface calculated by numerical simulation and theoretical calculation met the requirements of the regulations,and the expressway had not been damaged.