Analysis on the interaction between newly increased supplementary cultivated land and coal mining in underground coal mining area: a case study of underground coal mining in Longyan City

In order to scientifically utilize land resources, balance the land use structure, and effectively ensure food security and energy resource security, it is proposed to carry out a land improvement project at a suitable location on the surface of an underground mining coal mine area, adding additional farmland with guaranteed quantity and quality. Analyzes the interaction between the development and utilization of supplementary cultivated land and coal mining production from two aspects, and evaluates the soil pollution risk of agricultural land within the supplementary cultivated land to demonstrate the feasibility of newly increased supplementary cultivated land to local surface areas of the underground mining coal mine. The research results show that the scope of supplementary cultivated land is outside the mining area’s resource reserve exploitation scope, there are no coal mine tunnels or mined out areas under supplementary cultivated land, which has limited impact on the hydrogeological conditions of the mining area. In addition, according to relevant policies, coal mining enterprises can still handle registration procedures such as continuation and change within the original mining right scope. Coal mining enterprises standardize mining in accordance with relevant regulations and program requirements, generally without surface subsidence, significant changes in the surrounding land use pattern, and no impact on irrigation water sources. The soil samples in the supplementary cultivated land have been tested and found not to exceed the standard, and the risk of soil pollution in the agricultural land is low. Therefore, it can be seen that land remediation and the addition of supplementary farmland at suitable locations on the surface of the underground mining coal mining area are conducive to optimizing the allocation of land resources, and can provide reference for the coordinated development of mineral resources exploitation and utilization and farmland development and protection.