Abstract：Based on the uncertainty measurement theory，a risk-evaluating and order-arranging model of mining underground goaf was established. Considering the geologic condition and engineering status of underground goaf，14 factors that influence the stability of underground goaf were taken into account；and uncertainty measurement function was obtained based on the in-situ data. The uncertainty problems in risk evaluation were solved by qualitative analysis and quantitative analysis respectively. Entropy theory was used to calculate the index weight of factors；and credible degree recognition criteria were established according to the theory uncertainty measurement. The results of risk evaluation can be obtained with the credible degree criteria. This method can also arrange the order of risk degree. Furthermore，this model was employed to evaluate 15 risk underground goafs in Dabaoshan mine. Compared with the results of fuzzy synthetic evaluation method，the results show that uncertainty measurement method is reasonable and can be applied to the actual engineering.
