Abstarct: Blasting operation in open pit mining has direct effect on the production rate, economic and safety of mining as well as the environmental problem. In a blasting operation, in addition to the fragmentation which is the main aim of blasting, some undesirable events (e. g. fly rock, ground and air vibration and etc.) have been occurred. Accordingly, it can concluded that the risk of blasting operation in open pit mining is high. Consequently, to improving the operation, the results of it must be evaluated. Risk management is a management tools for identifying, evaluating and proposing approach for reducing risks. Therefore, in this research a risk-baxsed approach for assessing the results of blasting in iron ore mines was presented. For this purpose, baxsed on the literature, the nine common results of blasting operation was identified. Afterward, each of them were assumed as a top event of fault tree and the tree of them developed on the foundation of the cause factors. In this step, to determining the occurrence possibility of nine blasting consequences, the Fuzzy Fault Tree Analysis (FFTA) frxamework, which can considered the uncertainties of factors and experts’ opinion, was used. Then, the next component of risk (i.e. severity) was computed by the use of Fuzzy Analytic Hierarchy Process (FAHP). The severity of blasting results was classified into three category including safety, economic and environmental. Next, to recognizing the risk level of nine results, the risk matrix was established. The results show that fly rock and ground vibration are intolerable risks, while the noises, toe generations and uneven steps are unfavorable risks. Moreover, toxic gases, dust, hole cleave and fraction conditions classified on the tolerable class of risk and spontaneous blast is a negligible risk in iron mines. Finally, to reducing the risks level or controlling them, the front plan against risks and compensating them was presented.