高等级公路采动变形破坏数值模拟研究

以南屯矿区及其上方的邹济公路为背景,采用FLAC~(3D)软件,对采动影响下的高等级公路破坏机理和破坏过程进行了研究。研究表明:高等级公路采动变形经历先"上凸"后"下凹"过程,且破坏程度随着公路级别的降低而增加。应尽量使公路位于采空区正上方,且延伸方向和工作面推进的方向一致;若公路位于采空区一侧时,路面向采空区一侧整体滑移和倾斜;若公路延伸方向与工作面推进方向垂直,应注意采空区公路两端的上凸变形;应避免公路与采空区斜交。在相同地质采矿条件下,随着深厚比的增加,路面破坏程度减小,且在一定范围内,路面最大下沉值与深厚比存在非线性关系。研究成果为邹济公路下开采方案和公路维修治理提供必要的理论和技术支持。

Numerical Simulation Study on High -class Highway Failure due to Mining Deformation

By using numerical simulation soft FLAC3D and based on the Nantun mining area and Zouji highway above it ,a deep research on failure mechanism and process is conducted ,which can theoretical and technical support to the arrange-ment of mining scheme and the high -class highway maintenance management at the same time .The research shows that under the same geological conditions and infection of mining zone ,the highway’s capacity of resistance to deformation is strongest ,first-class highway and second-class highway are easily squeezed ,while highway is easily impacted by tensile fracture;and it is wise to avoid the oblique crossing of roads and goaf .It is also found that both sides of road are more easily affected by the mining deformation ,so we should pay more attention to the protection of both sides of high -class highway;In a certain range ,the damage of high -class highway reduces by the increment of the ratio of depth and thickness ,and there is a nonlinear relationship between the maximum subsidence value and the ratio of depth and thickness .