Treatment and utilization of coal mine water based on "deep ground-underground-surface ground" linkage system
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摘要: 煤矿矿井水的高效低耗处理有助于推动煤炭资源的安全、高效开采。现有矿井水井下处理工艺选择受限、处理量小，地面处理占地面积大、运行成本高，矿井水处理后外排至地表又会产生高额的排水费。本文在总结分析煤矿矿井水处理技术现状基础上，提出了“深地-井下-地面”联动的煤矿矿井水处理利用模式：对矿井涌水通过“井下-地面”协同的方式进行高效低耗处理，处理后的矿井水部分用于矿区生产和矿区居民生活，其余部分则进行深地回灌或外排。首先介绍了该模式的基本原理；然后从水质、水量、水文、地质、地下建筑结构和回灌工程可行性对矿井水回灌工程的适用性进行评估和分析；最后介绍了不同水质矿井水处理技术和“井下-地面”协同处理技术体系，尤其针对回灌含水层选择、回灌施工作业、回灌试验、回灌水质模拟、回灌安全性分析等进行总结。Abstract: The highly-efficient treatment of coal mine water with low energy consumption contributes to much safer and more efficient coal mining. At present, mine water processing at underground is still limited for its small treatment water yield, large land coverage and high operation cost in ground treatment, high drainage costs when mine water is discharged into the surface water system. In this light, this study puts forward the "deep ground-underground-surface ground" linkage system for mine water treatment and utilization. The treated mine water is partially used for mining production and residential usage, while the rest is subject to deep reinjection or drainage. This paper first introduces the operational mechanism behind this system, and then evaluates its validity in terms of water quality, water quantity, hydrogeology, underground structure, and feasibility of recharge engineering. This study then reviews existing mine water treatment methods for varying water qualities and the "underground-surface" joint treatment system; Also, a summary is drawn regarding the selection of aquifer for reinjection purposes, reinjection construction operations, reinjection tests, simulation of reinjection water quality, and analysis of reinjection safety.
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Key words:
- coal mine /
- mine water /
- recycling /
- reinjection
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图 2 基于“深地-井下-地面”联动的矿井水处理利用体系
Figure 2. "Deep ground-underground-surface ground" linkage system for mine water treatment and utilization
图 3 基于“深地-井下-地面”联动的矿井水处理与利用概念模型示意图
Figure 3. Conceptual model of "deep ground-underground-surface ground" linkage system for mine water treatment and utilization
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