Research on assessment of sustainability in coal mine based on NbS of Hengshan Open-pit Mining Area

Mine sustainability evaluation can indicate the ability and level of mine sustainable development, which is of great significance to the realization of the overall sustainable development of a country or region.Nature-based solutions (NbS) have been regarded as the core means to achieve sustainable development in recent years and China has become one of the leading countries for NbS action and promotes the practice and development of NbS in different fields.After analyzing the NbS concept and global standards, this paper takes the Hengshan Open-pit Mining Area as an example to conduct a sustainability evaluation study based on NbS.The evaluation index is established based on the NbS index system, the analytic hierarchy process is used to calculate the index weight, combined with expert scores, and the comprehensive index method is used to determine the final evaluation level.The evaluation results show that the sustainability score is 1.24, the grade is V, and the level of sustainable development is extremely weak.This means that the study area should design and carry out mine ecological restoration based on various criteria and indicators.The sustainability evaluation of mines based on the NbS index system is a feasible new method, and the NbS index system can provide guidance for the design of ecological restoration schemes in mines, which is conducive to the sustainable development of mines.