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煤铀共生型矿区地下水污染一体化防控与治理技术体系构想

Conceptual framework for integrated groundwater pollution prevention, control, and remediation in coal-uranium coexisting mining areas

  • 摘要: 我国多个大型沉积盆地内煤炭与砂岩型铀矿广泛叠置共生赋存,在煤矿井工开采与砂岩型铀矿地浸开采等多重扰动叠加作用下,地下水系统面临高矿化度、重金属富集、高放射性、强酸碱性及高氧化性等复合污染风险。本文在系统梳理煤矿与地浸铀矿地下水污染防控技术的基础上,重点分析煤铀共生型矿区地下水污染的复合特征及现行“煤矿管煤、铀矿管铀”分割治理模式的局限性。研究认为,传统单矿种防控体系难以兼顾区域地下水流场、水化学场和污染羽迁移的整体响应,易造成监测网络分割、数据孤岛、局部治理与整体风险失衡等问题。面向煤铀协同开采条件下的地下水环境安全需求,本文提出煤铀共生矿区地下水污染一体化防控与治理技术构想,开发煤铀协采地下水多场耦合模拟软件,构建煤矿与铀矿共享的地下水监测与预警系统和协同数字孪生平台,统筹矿井水及相关返排水处理与回注,在煤矿与铀矿之间构建水力帷幕,联合优化采掘进度与抽注方案,从区域尺度协调控制含水层水位演化和污染羽迁移,实现对煤矿和铀矿地下水污染的同步防控。本文从宏观层面分析了一体化防控在降低区域地下水环境风险、提高矿井水资源化利用效率和支撑煤铀协调开采方面的综合效益,为煤铀资源安全绿色高效开发提供了重要思路。

     

    Abstract: Coal resources and sandstone-type uranium deposits are widely co-occurring and superimposed in many large sedimentary basins in China. Under the combined disturbances induced by underground coal mining and in-situ leaching of sandstone-type uranium deposits, groundwater systems are exposed to compound contamination risks characterized by high salinity, heavy metal enrichment, elevated radioactivity, strong acidity/alkalinity, and high oxidizing conditions. Based on a systematic review of groundwater pollution prevention and control technologies for coal mines and in-situ leaching uranium mines, this paper focuses on the compound characteristics of groundwater contamination in coal-uranium coexisting mining areas and analyzes the limitations of the current fragmented governance model, in which “coal mines manage coal-related issues and uranium mines manage uranium-related issues.” The study suggests that conventional single-mineral prevention and control systems are unable to fully account for the integrated responses of regional groundwater flow fields, hydrochemical fields, and contaminant plume migration. Such systems may lead to fragmented monitoring networks, isolated data systems, local-scale remediation that is disconnected from regional risk control, and an imbalance between localized treatment and overall environmental risk management. To meet the groundwater environmental safety requirements under coordinated coal-uranium mining conditions, this paper proposes an integrated framework for groundwater pollution prevention, control, and remediation in coal-uranium coexisting mining areas. The proposed framework includes the development of multi-field coupled groundwater simulation software for coordinated coal-uranium mining, the establishment of a shared groundwater monitoring and early-warning system for coal and uranium mines, and the construction of a collaborative digital twin platform. It also involves the coordinated treatment and reinjection of mine water and associated flowback water, the establishment of hydraulic curtain between coal mining and uranium mining areas, and the joint optimization of mining schedules and pumping-injection schemes. Through these measures, aquifer water-level evolution and contaminant plume migration can be regulated at the regional scale, thereby enabling the simultaneous prevention and control of groundwater contamination from both coal and uranium mining activities. This paper further provides a macro-level analysis of the comprehensive benefits of integrated prevention and control, including reducing regional groundwater environmental risks, improving the resource utilization efficiency of mine water, and supporting coordinated coal-uranium exploitation. The findings offer an important conceptual basis for the safe, green, and efficient development of coal and uranium resources.

     

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