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Integrated Mining and Reclamation Practices Enhance Sustainable Land Use: A Case Study in Huainan Coalfield, China

Author

Listed:
  • Zhanjie Feng

    (School of Environment Science & Spatial Informatics, China University of Mining & Technology, Daxue Road 1#, Xuzhou 221116, China)

  • Zhenqi Hu

    (School of Environment Science & Spatial Informatics, China University of Mining & Technology, Daxue Road 1#, Xuzhou 221116, China
    Institute of Land Reclamation & Ecological Restoration, China University of Mining & Technology (Beijing), Beijing 100083, China)

  • Xi Zhang

    (School of Environment Science & Spatial Informatics, China University of Mining & Technology, Daxue Road 1#, Xuzhou 221116, China)

  • Yuhang Zhang

    (School of Public Policy & Management, China University of Mining & Technology, Daxue Road 1#, Xuzhou 221116, China)

  • Ruihao Cui

    (School of Environment Science & Spatial Informatics, China University of Mining & Technology, Daxue Road 1#, Xuzhou 221116, China)

  • Li Lu

    (School of Environment Science & Spatial Informatics, China University of Mining & Technology, Daxue Road 1#, Xuzhou 221116, China)

Abstract

In the coal-grain composite area (CGCA) of eastern China with a high groundwater table (HGT), underground coal mining subsidence has caused extensive submergence of farmland, posing a significant threat to regional food security. Currently, land reclamation techniques in mining subsidence areas primarily focus on post-mining reclamation (PMR) of stable subsidence land with a low reclamation rate. This study investigated the application of concurrent mining and reclamation (CMR) technology for unstable subsidence land in a representative HGT mining area, namely the Guqiao Coal Mine in the Huainan Coalfield. Firstly, mining subsidence prediction and geographic information technology were employed to simulate the spatio-temporal evolution of dynamic mining subsidence, taking into consideration the mining plan. Subsequently, phased reclamation parameters were quantitatively designed by integrating the dynamic mining subsidence and surface reclamation measures. Lastly, scenario simulations were conducted to discuss the effectiveness of CMR in comparison with non-reclamation (NR) and PMR. Additionally, reclamation and ecological restoration strategies for coal mining subsidence areas with comprehensive governance modes were proposed. The findings indicated that mining activities have led to a reduction in both the quantity and quality of original farmland, with 70% of the farmland submerged and rendered uncultivable. In contrast to PMR, which achieved a reclamation rate of 29%, CMR can significantly increase the farmland reclamation rate to 69% while also prolonging the service life of farmland. This study provides theoretical support and technical references for promoting sustainable mining practices, protecting farmland, and facilitating the high-quality development of coal resource-based cities.

Suggested Citation

  • Zhanjie Feng & Zhenqi Hu & Xi Zhang & Yuhang Zhang & Ruihao Cui & Li Lu, 2023. "Integrated Mining and Reclamation Practices Enhance Sustainable Land Use: A Case Study in Huainan Coalfield, China," Land, MDPI, vol. 12(11), pages 1-15, October.
    • Handle: RePEc:gam:jlands:v:12:y:2023:i:11:p:1994-:d:1271440
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    References listed on IDEAS

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    1. Hu, Zhenqi & Yang, Guanghua & Xiao, Wu & Li, Jing & Yang, Yaoqi & Yu, Yang, 2014. "Farmland damage and its impact on the overlapped areas of cropland and coal resources in the eastern plains of China," Resources, Conservation & Recycling, Elsevier, vol. 86(C), pages 1-8.
    2. Jan Blachowski & Anna Kopeć & Wojciech Milczarek & Karolina Owczarz, 2019. "Evolution of Secondary Deformations Captured by Satellite Radar Interferometry: Case Study of an Abandoned Coal Basin in SW Poland," Sustainability, MDPI, vol. 11(3), pages 1-21, February.
    3. Zhu, Yuanyuan & Wang, Ziwei & Zhu, Xiaohua, 2023. "New reflections on food security and land use strategies based on the evolution of Chinese dietary patterns," Land Use Policy, Elsevier, vol. 126(C).
    4. Jie, Dingfei & Xu, Xiangyang & Guo, Fei, 2021. "The future of coal supply in China based on non-fossil energy development and carbon price strategies," Energy, Elsevier, vol. 220(C).
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