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碳中和下高潜水位采煤塌陷区水碳耦合机理

Coupling mechanism of water and carbon in coal mining subsidence areas with high water level under carbon neutrality

  • 摘要: 揭示采煤活动影响下高潜水位矿区水碳协同运移机制,为矿区生态修复工程实施及固碳增汇潜力提升提供科学支撑。以采煤扰动区水碳迁移过程为研究对象,综合考虑自然因素(气候、地质条件)与人为因素(采矿活动、土地利用变化)在多尺度上的耦合作用,通过分析地下水系统与土壤水系统的双向反馈机制,探究水–土–气界面相互作用对碳循环系统的驱动规律。研究发现,采煤活动导致的土壤物理结构破坏(孔隙度、渗透性改变),会引发地下水位动态平衡失调,进而重塑区域水循环路径,并通过水–土–气界面作用驱动碳循环失衡;同时明确了地下水与土壤水的双向反馈对碳元素在溶解态、气态和固态间的形态转化及空间分布起主导作用。当前研究在多尺度过程耦合的定量表征、水系统碳通量对扰动的响应特征识别及模型区域适配性方面存在不足;高潜水位采煤塌陷区水碳协同运移机制研究涉及矿区生态修复和固碳增汇,未来需构建多尺度水碳耦合模型框架、深化微观响应机理研究,并整合空天地一体化监测网络提升模型模拟预测能力。通过对不同采煤强度、不同地质条件下的矿区进行对比分析,验证了上述机制的普适性与特殊性,可用于后续针对具体矿区的个性化修复方案制定。所提出的多尺度研究框架与技术手段,可应用于其他类似扰动区域的水碳循环研究。

     

    Abstract: Water-carbon co-migration mechanisms in high-seepage groundwater areas affected by coal mining are explored, providing a scientific basis for ecological restoration and enhancing carbon sequestration. It focuses on water-carbon migration in coal-mining disturbance zones, examining the multi-scale coupling effects of natural factors (e.g., climate, geology) and human activities (e.g., mining, land use change). By analyzing bidirectional feedback between groundwater and soil water systems, it explores how water-soil-air interface interactions drive the carbon cycle. The findings show that coal-mining-induced soil physical structure degradation (porosity and permeability changes) disrupts groundwater level equilibrium, remodels water circulation, and causes carbon cycle imbalance through water-soil-air interactions. Groundwater-soil water bidirectional feedback dominates carbon transformation and distribution in different phases. Current limitations include quantitative characterization of multi-scale process coupling, identification of water system carbon flux responses, and regional model adaptability. Future research should establish multi-scale water-carbon coupling models, study micro-scale response mechanisms, and integrate space-air-ground monitoring networks to improve simulation. Comparative analyses across different mining intensities and geological conditions confirm the universality and specificity of these mechanisms, offering a framework for customized ecological restoration strategies. The proposed multi-scale research framework and techniques can be applied to similar disturbance areas.

     

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