Abstarct: The population growth in the world, high demand for resource, development and growth in economic have caused to increase mining activities. The amount of exploitation of these resources has different positive and negative effects on the economic, environmental and social parameters. Therefore, the operation should be carried out to the amount such that to be best in terms of sustainable development. Therefore, the aim of this study is to present evaluation of the sustainable development for underground coal mining. This assessment can be considered as a mechanism to provide appropriate usage of human and natural resources to reduce costs. In order to achieve the goals of this research, at first the most important parameters affecting sustainable development in underground coal mines have been identified baxsed on the literature review. In the following, questionnaires were designed and distributed among the experts in order to collect necessary data. Then, the decision-making trial and evaluation laboratory (DEMATEL) technique was used to determine the importance of the parameters. In addition, by means of Fuzzy Delphi Analytical Hierarchy Process (FDAHP) the weight and importance of each of the parameters were determined. Then a new classification system was introduced with use of the results of these two methods. This system, is named the Sustainable Development Index (SDi) in which a number from 10 to 100 can be assigned to each coal mines. By this system, sustainable development of underground coal mines can be classified into five categories including very good, good, moderate, weak and very weak. In order to evaluate the efficiency of the method, data of three mining zones were collected from the mining company of Northeast Shahrood Company comprises: Zemestan Yuort, Malach Aram, Oclon4. The sustainable development in these mines is evaluated as weak. Finally, Phillips method was also used to validate the classification system. The result shows that there is a relatively good concordance between two methods.