采煤沉陷区治理修复与开发利用关键技术进展

Advances in key technologies for the management, restoration, development, and utilization of coal mining subsidence areas

  • 摘要:
    背景 煤炭资源开采形成的采煤沉陷区已成为制约我国生态文明建设与社会经济可持续发展的难题,其治理修复与开发利用对生态安全、粮食保障及能源转型意义重大。
    方法 针对采煤沉陷区“旧账未清、新账叠加”的治理困局,研究基于治理、修复、开发、利用的核心概念,构建“理论−现实”双层分区依据体系,将全国采煤沉陷区划分为平原耕地修复区、高寒林草地生态保护区、高潜水位湿地建设区、荒漠新能源开发区、城市建设利用区、地下空间开发利用区6类功能导向型分区,系统梳理各分区关键技术进展、实践成果及现存挑战。
    进展 平原耕地修复区聚焦“充填材料优化−科学土壤重构工艺−主动修复策略”,实现损毁耕地生产力恢复;高寒林草地生态保护区构建“耐寒植物筛选配置−适生土壤基质构建−合理人工植被重建−差异化水资源管理”,解决极端环境下生态系统重建难题;高潜水位湿地建设区发展“湿地新农业−水资源调蓄−光伏开发”模式,实现水文系统重构与生态价值转化;荒漠新能源开发区探索新能源开发建设、生态效应评估以及新能源消纳难题,支撑“沙戈荒”能源基地建设;城市建设利用区形成“精细勘探−靶向治理−结构抗变形−注浆质量检测−多手段协同监测−残余变形监测预警与塌陷风险控制”全流程技术链,保障地上、地面工程安全开发;地下空间开发利用区基于废弃矿井功能转化潜力与开发适宜性,探索废弃矿井多维开发利用路径。研究表明,功能导向型分区具有科学性与有效性,当前采煤沉陷区在土地结构转型、生态功能恢复方面取得显著成效,但仍面临技术适配性不足、多源数据融合滞后、生态价值转化路径不明等共性问题。
    展望 从智能化水平、数字化转型、碳汇经济开发等方面,展望了采煤沉陷区治理修复与开发利用发展趋势,提出围绕黄河泥沙资源化利用与智能采复协同、高寒矿区生态修复功能群落精准配置与冻土防护、高潜水位沉陷区湿地碳汇经济价值评估等进一步的研究方向,为我国矿山城市可持续发展提供参考。

     

    Abstract:
    Background Coal mining subsidence areas, formed by the exploitation of coal resources, have emerged as severe challenges to the construction of ecological civilization and the sustainable development of the social economy in China. Their management, restoration, development, and utilization play a significant role in ecological security, food security, and energy transformation.
    Methods This study aims to address the unresolved and emerging issues in the management of coal mining subsidence areas. Based on the core concepts of management, restoration, development, and utilization, this study developed a dual-level zoning basis system combining theories and reality. Accordingly, coal mining subsidence areas in China were classified into six types of functional areas: cultivated land restoration areas in plains, ecological conservation areas in alpine forest lands and grasslands, wetland construction areas in areas with high phreatic surfaces, renewable energy development areas in deserts, urban construction and utilization areas, and underground space development and utilization areas. For these areas, this study systematically summarized the advances in key technologies, practical achievements, and existing challenges.
    Advances  For cultivated land restoration areas in plains, the filling material optimization, scientific soil reconstruction technology, and proactive restoration strategy have been integrated to restore the productivity of destroyed cultivated land. For ecological conservation areas in alpine forest lands and grasslands, the selection and configuration of hardy plants, the construction of matching soil matrix, reasonable artificial vegetation rehabilitation, and differential water resource management have been combined to address the challenge in ecological reconstruction in extreme environments. For wetland construction areas in areas with high phreatic surfaces, novel wetland agriculture, artificial regulation of water resources, and photovoltaic development have been jointly adopted to reconstruct hydrological systems and transform ecological value. For renewable energy development areas in deserts, renewable energy development and construction, ecological effect assessment, and renewable energy consumption have been explored to support the construction of energy bases in deserts, Gobi, and wastelands. For urban construction and utilization areas, a whole-process technology chain consisting of fine-scale exploration, targeted management, deformation-resistant structures, grouting quality detection, multi-approach collaborative monitoring, monitoring and early warning of residual deformations, and collapse risk control has been utilized to ensure the safe construction of aboveground and ground engineering. For underground space development and utilization areas, multi-dimensional development and utilization paths for abandoned mines have been explored based on the function transformation potential and development suitability of abandoned mines.
    Prospects  From the perspectives of intelligence level, digital transformation, and the economic development of carbon sinks, this study envisions the management, restoration, development, and utilization trends of coal mining subsidence areas. Moreover, this study proposes subsequent research directions, including the resource utilization of Yellow River sediments and corresponding intelligent mining and restoration coordination, the precise configuration of communities facilitating ecological restoration and frozen soil protection in alpine mining areas, and the economic value assessment of wetland carbon sinks in subsidence areas with high phreatic surfaces. The results of this study will serve as a reference for the sustainable development of mining cities in China.

     

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