淄博洪山、寨里煤矿区闭坑后地下水污染特征及成因分析

Characteristics and Causes of Groundwater Pollution after Hongshan-Zhaili Mine Closure in Zibo

为缓解淄博市洪山、寨里煤矿区地下水供需矛盾,满足生产和生活用水以及为闭坑矿区地下水污染治理提供理论依据,通过采集淄博江山、寨里煤矿区近期奥灰含水层水样进行室内检测分析,并以闭坑前煤矿区奥灰水水质资料为背景值,对煤矿区闭坑后奥灰水进行污染评价,分析了地下水污染特征,并对地下水污染成因进行了研究。结果表明:该煤矿区闭坑后地下水污染严重,且沿着补给区、径流区和排泄区地下水污染有逐渐增大的趋势;煤矿闭坑后,停止抽排地下水,造成矿坑水水位大幅上升,通过部分止水不良或无止水措施的供水井、无序开采的小煤井、断层构造,串层污染奥灰水,是本区地下水污染的主要原因。该研究成果对该煤矿区地下水污染修复及类似矿区开采研究具有重要的参考意义。

In order to ease the imbalance between supply and demand in mining groundwater in Hongshan- Zhaili coal mine area of Zibo City, to meet the production and living water demand and to provide a theo- retical basis for groundwater pollution treatment after mine closure, by collecting water samples to carry out indoor detection analysis and using the water quality data as background values, this paper conducts pollution assessment of Hongshan-Zhaili Ordovician limestone mine water, including the characteristics and causes of groundwater pollution. The results show that groundwater pollution in the study area is seri- ous,and the pollution tends to gradually extend along the recharge, runoff and discharge zones; after mine closure, pumping groundwater stops,mine water level rises, then Ordovician limestone mine water is cross strata polluted by mine water through supply wells of poor sealing or no sealing measures and small coal mines in disorderly exploitation,which are the main causes of groundwater pollution in this area. The re- search provides reference for pollution remediation in this coal mine area and exploitation research in the similar mine areas.