Abstract: In order to study the stability classification and the comprehensive processing of goaf group in the 104# orebody of Fozichong mine，and on the basis of earlier exploration of the goaf，simulation analysis on the stability of goaf group was made based on ANSYS and FLAC^3D coupling By selecting four factors including the exposed area of the goaf roof，the maximum principal stress，the minimum principal stress and the maximum displacement from numerical calculation，the goaf group are classified with the fuzzy clustering theory to realize four level classification of goaf stability Aimed at these four kinds of goaf，such treatment measures as strengthening monitoring and management，strengthening support，partial backfill and whole backfill were respectively proposed to ensure the production safety of Fozichong mine and save the handling cost of goaf.

Key words: Numerical simulation, Goaf stability, Fuzzy clustering, Goaf handling