15 / 2023-03-24 09:47:30

Characteristics analysis and transformation path of space resources in closed mine

closed mines,above/underground space,resource characteristics,basin scale,transformation path

Some mines have reached the end of their life cycle due to China's ongoing social and economic development and coal resources. By 2030, China is anticipated to close 1500 mines. Direct closure/abandonment of mines will not only result in massive resource waste and the loss of state-owned assets but also cause ecological and environmental problems.In view of resource waste and environmental and social problems caused by closed mines, how to scientifically develop and utilize closed mine resources and promote the transformation of resource-exhausted mining areas has become an important issue in the field of energy and environment in the world today. The primary research topics covered in this article: (1) Analyzing the academic concerns and associated research hotspots of closed mines at home and abroad, summarizing the key issues that need to be researched and solved in the field, and examining the theoretical framework and key assessment techniques. (2) The closed mine resources were identified using satellite-airborne-ground data, and the types of above/underground resources in the mine were divided. The above ground resources included surface water resources, land resources, industrial square and living area buildings, etc., and the underground resources included groundwater resources,residual coal resources, underground space resources and underground equipment, etc. (3) By the evaluation model of space resources above/underground the mine, the building space volume of the whole industrial square of Zhujiahe coal mine was 1.04×10⁵ m³, the volume of underground space including shaft, roadway and chamber was 1.18×10⁵ m³ and the total residual coal resource was nearly 56 million tons. (4) The existing transformation and utilization methods of closed mines at home and abroad were compared, and the technical system of transformation path of closed mines was given based on constraint factors, suitable transformation grade and resource conditions. The aboveground transformation was divided into four modes: mining tourism development and utilization mode, natural ecological restoration mode, integrated underground space utilization mode, restoration and development comprehensive utilization mode, and the underground transformation was divided into three modes: underground resource reuse mode, economic utilization and development mode, low-canon ecological development model. According to the determination steps of resource transformation path, the optimal transformation paths for 15 closed mines in Weihe River Basin were given. The study can provide a theoretical basis and methodological reference for quantifying the underground space resources of closed mines, and provide a practical transformation blueprint and reference example for other closed mine enterprises to achieve transformation and sustainable development.