Abstract: With the application of large diameter deep hole mining method, the exposed area of gob roof is further expanded, and the problem of cavitation instability is highlighted.In order to master the stable state of goaf in time, we need strengthen goaf management to avoid major safety accidents in mines caused by the collapse of goaf, therefore, it is necessary to carry out goaf stability analysis during mining.In this paper, on the basis of summarizing the commonly used goaf stability analysis methods at home and abroad, the numerical calculation model of goaf is established with the advanced BLSS-PE mine 3D laser scanning system, through the simulation of stopping process, the stress and displacement distribution cloud map of different stope stages are analyzed, the influence of two-step stope recovery on the stability of one-step goaf is obtained, the results show that the stress concentration range around the one-step goaf is further enlarged and stress superposition is formed by two-step stope recovery, in particular, stress concentration appears at the pillar position, the maximum stress concentration is about 26 MPa, and the vertical displacement increases, the maximum displacement is close to 5 mm, there is a risk of roof collapse.