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采空区地表沉降影响因素众多,以有限元差分软件FLAC3D为基础,利用数值模拟方法的灵活性,选用适合于岩土类材料的库伦摩尔模型,研究采空区上覆岩层力学性质、结构特征对地表沉降的影响。结果表明:上覆岩层力学性质、结构特征对地表沉降有着很大的影响,不同的岩层组合会使地表所产生的地表沉降效果不同。在其他条件相同的情况下,坚硬岩层的地表下沉值小于软弱岩层的地表下沉值。
There are many influencing factors of surface subsidence in goaf. Based on finite element difference software FLAC3D, using the coulomb model suitable for geotechnical materials, the mechanical properties and structural features of overlying strata in goaf are studied by using the flexibility of numerical simulation method Impact on surface subsidence. The results show that the mechanical properties and structural characteristics of the overlying strata have a great influence on the ground settlement. Different strata assemblages will result in different surface subsidence effects. Under other conditions, the surface subsidence value of hard rock formation is less than the surface subsidence value of soft rock formation.