以贵州仁赤高速公路朱家沟煤矿为例,通过地质力学分析方法评价煤矿采空区上覆岩层的稳定性情况;利用离散单元法,拟定计算模型,并进行开挖模拟计算。通过对计算结果的分析,研究煤矿开采引起的覆岩移动规律、地表变形规律,计算已有采空区可能引起的地表变形范围和变形量,进而对高速公路煤矿采空区稳定性和对高速公路的影响进行评价。 Taking the Zhujiagou coal mine of Renqi Expressway in Guizhou Province as an example, the stability of overlying strata in the mined area of ​​the coalmine was evaluated by geomechanical analysis method. The discrete element method was used to calculate the model and to simulate the excavation. Through the analysis of the calculation results, the law of overlying strata movement and surface deformation caused by coal mining are studied, and the range of surface deformation and deformation that may be caused by the mined-out area are calculated. Then, The impact of roads is evaluated.