新建楼下伏采空区的稳定性数值分析

以唐山古冶分公司新建11^#楼下伏采空区为例，采用离散元方法程序3DEC对采空区上方建筑物的稳定性进行数值分析。根据勘查获得采空区分布范围和采空区岩层信息，运用由整体到个体的方法建立3D计算模型，分析不处理和处理情况下采空区的稳定性。通过模拟计算，在不处理的情况下，监测点沉降量约为20 cm；在模拟注浆充填体的物理特征来处理采空区的情况下，监测点沉降量约为3.5 cm。模拟结果表明，采空区处理后，沉降量在建筑物允许沉降范围之内，为施工采取相应措施提供了理论依据。

Numerical Analysis of Stability of Mined-out Area Underlying an New Building

Taking mined-out area underlying new building 11^# belonging to Guye Branch in Tangshan as a case, the numerical analysis of buildings' stability above was proceeded by discrete element code(3DEC). According to the distribution and rock stratum information of mined-out area surveyed, 3-dementional numerical model was established by using the method from the whole to the individual, to analyze the stability of mined-out area with and without disposal. By simulation, the settlement of monitoring points is about 20cm without disposal, and the settlement of monitoring points is about 3.5cm under the condition of simulating the physical characteristics of grouting to treat the mined-out area. Simulation results show that the settlement is within the building settlement range after mined-out area disposed, and this provides a reference criterion for construction.