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Innovative for farmland reclamation: Optimizing earthwork allocation and elevation in mining-induced subsidence
Zhuo Wang1, Gensheng Li1, Junjiang Liu1
1College of Geology and Mining Engineering, Xinjiang University, Urumqi, 830046, China; Provincial-ministerial Collaborative Innovation Center for Green Development of Mineral Resources and Ecological Restoration in Xinjiang, Urumqi, 830046, China.
Journal of Environmental Management
|October 9, 2025
Summary
Mine reclamation in China
Area of Science:
- Geosciences
- Environmental Engineering
- Agricultural Science
Background:
- Coal mining in China's Yili Coal-Grain Composite Area (CCA) causes significant farmland degradation.
- Shallow-buried, ultra-thick coal seams lead to mining subsidence, impacting agricultural land.
Purpose of the Study:
- To investigate mine reclamation strategies for addressing subsidence in the Yili CCA.
- To optimize reclamation elevation methods by predicting subsidence morphology and farmland damage boundaries.
Main Methods:
- Four reclamation schemes were designed based on three geological profiles.
- Earthwork allocation was optimized by varying elevation controls and analyzing different reclamation strategies.
- Sub-area layouts were optimized along the dip-directional elevation gradient.
Main Results:
- Topographic gradients result in asymmetric earthwork distribution, with higher needs in southern zones.
- Optimizing sub-area layouts along the elevation gradient significantly reduces earthwork demands.
- Morphology-based reclamation effectively mitigates elevation differences and minimizes earthwork, especially in sloped subsidence areas.
Conclusions:
- Geomorphic alignment is critical for minimizing earthwork in mine reclamation.
- Adaptive terrain integration and morphology-based reclamation offer cost-effective solutions for farmland restoration post-mining.
- Findings guide optimized reclamation in the Yili CCA, prioritizing topographic adaptability and engineering efficiency.
Keywords:
Coal miningCoal-grain composite areaFarmland reclamationMining subsidenceReclamation elevationMore Related Videos
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