大型采空区灾害存在突发性与破坏范围大等特点，如何对采空区灾害进行有效的预防和控制是采空区隐患治理的重要工作。以某矿山为背景，利用井下无人机三维激光扫描系统对采空区进行精细探测，并利用Geomagic对模型进行优化，然后利用FLAC3D进行采空区稳定性分析，确定了大型复杂采空区的隐患区域；将圈定的隐患区域与现场采空区实际冒落情况进行对比，验证了采空区空间结构演化结果与数值分析结果相吻合，证实了该数值分析方法的可靠性。最后基于采空区三维激光扫描结果，再次对采空区进行数值分析，重新圈定采空区的隐患区域。研究结果为矿山采空区安全隐患识别和治理措施的制定提供了科学依据。

The governance of large and complex goaf groups is a long-term process.Aiming at the mined-out area groups at different control stages，the formulation of scientific and reasonable control plans plays a vital role in the safety of mine production.After years of mining in an underground mine，a large number of mined-out areas have been formed.Due to the long existence of the mined-out areas，the upper and lower middle sections of some mined-out areas and adjacent panels have caving through，forming a large and complex group of mined-out areas，which seriously threatens the safe production of the mine.At present，numerical simulation is one of the effective methods to analyze the stability of the goaf.However，in the process of numerical analysis，for complex and large goaf groups，there is a direct conversion of the three-dimensional laser point cloud data into a computable grid model.Difficulties such as huge number of grids，long calculation time，inability to converge or even calculation.In order to obtain a calculable high-precision goaf group model，first use 3D laser scanning to scan and detect the goaf group to obtain an accurate 3D model of the goaf.Due to the large amount of point cloud data from the 3D laser scanning，it is passed through Geomagic-Midas Coupling modeling，processing the model under the condition of ensuring that the basic shape of the model is not distorted，and obtaining a computable numerical model of the goaf group.Then use FLAC3D to perform numerical calculations on the goaf group，according to the stress cloud diagram，displacement cloud diagram and plasticity area distribution map，preliminary analysis of the entire goaf group.And at the same time，according to the displacement instability criterion，the roof hidden danger areas of No.1 large goaf and No.3 medium goaf are determined.The simulation calculation results were compared with the site caving detection results verifies the reliability of the numerical simulation method.Due to the occurrence of local caving，the roof stress of the goaf group is redistributed，so the secondary numerical simulation of the goaf group after the caving was carried out，and the scope of the hidden danger area was predicted.The research results provide a scientific basis for the identification of safety hazards and the formulation of control measures in the mine goaf.