Abstract: On the basis of practical datas of a mined-out area in No.6 Pingdingshan coal mine, 11 main factors were analyzed. Due to the interaction among these factors, mined-out area stability evaluation index system was established. Two-level comprehensive evaluation model was set up by using multi-level fuzzy mathematics method, and weights of each factors were confirmed with analytic hierarchy process. The stability of this mined-out area was evaluated, and the results were close to the reality. It provides reference and basis for mined-out area control.

Key words: Analytic Hierarchy Process, Multi-level fuzzy evaluation, Mined-out area, Stability evaluation