This paper aimed at the problems such as low restoration rate of land resources and long time for subsidence land reclamation by traditional technology with the condition of final subsided status. Based on the introduction and discussion of the research history for unsteady subsidence land reclamation, the concept of concurrent mining and reclamation(CMR) was proposed. The connotation, principles, technical classifications, and key technologies of CMR for underground coal mining were presented. The advantages with high reclamation percentage of land resources for the new technology were proved based on a case study, which indicated that CMR could increase farmland reclamation percentages to 37.59% comparing with the farmland reclamation percentage of post-mining. The scope of application and application prospects of the technology were also discussed, CMR could be used in 5 of the 14 large coal bases. It is estimated that the application of CMR could increase land area by 6680.8 km 2 .
