矿山生态修复土壤重构技术从固体废物利用到生态恢复

Soil reconstruction technology for ecological restoration of mines: from utilization of solid waste to ecological recovery

  • 摘要: 矿产资源开发引发土壤压实、有机质流失及重金属污染等生态退化问题。矿区土壤重构是矿山生态修复的核心环节,其核心目标是通过物理、化学和生物手段恢复受损土壤的生产力和生态功能。近年来,采矿固体废物的资源化利用为土壤重构提供了新的材料来源和技术路径。多指标决策模型结合田间试验与数值模拟,优化了固体废物基材料配比,降低了技术成本,使得煤矸石、粉煤灰、钢渣等采矿固体废物通过改良及精准配比,有效改良土壤物理结构、水分调控及重金属钝化;分层重构使孔隙度达到或接近自然水平;植生袋技术与类壤土喷播攻克了60°~90°陡坡修复难题;混播植被结合微生物调控使得碳汇能力显著提升;四维指标体系支撑量化评价,但固体废物长期风险与区域适配性仍需引起关注。未来需研发智能预警平台与分矿种标准,推动无废矿山建设,以实现矿区生态系统的可持续恢复。

     

    Abstract: The development of mineral resources leads to ecological degradation problems such as soil compaction, loss of organic matter, and heavy metal pollution. Soil reconstruction in mining areas is central to mine ecological restoration, with the core goal of restoring the productivity and ecological functions of damaged soil through physical, chemical, and biological means. In recent years, the resource utilization of mining solid waste has provided new material sources and technical paths for soil reconstruction. The integration of the multi-index decision-making model, field experiments, and numerical simulation has optimized the proportion of solid waste-based materials and reduced technical costs. Consequently, mining solid wastes such as coal gangue, fly ash, and steel slag can effectively improve soil physical structure, water regulation, and heavy metal immobilization through improvement and precise proportioning. The layered reconstruction makes the porosity reach or approach natural levels. Technologies such as vegetation bags and soil-like spray seeding have overcome the problem of restoring steep slopes of 60° to 90°. Moreover, mixed vegetation combined with microbial regulation significantly enhances carbon sequestration capacity. The four-dimensional index system supports quantitative evaluation; however, long-term risks associated with solid waste and regional adaptability continue to pose significant challenges. Future efforts should focus on developing intelligent early warning platforms and standards for different types of mines to promote the construction of "waste-free mines" and achieve the sustainable recovery of the mining area ecosystem.

     

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