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分别采用1∶4和1∶6两种不同的灰砂比(水泥/尾砂)制成胶结充填体试块在不同来源地下水水样中浸泡,浸泡后水样中的重金属含量与《地下水质量标准》(GB/T 14848-93)Ⅲ类标准规定的含量限值进行对照分析,考察金属矿山尾砂胶结充填对地下水的污染。结果表明,灰砂比为1∶4和1∶6的金属矿山全尾砂胶结充填体试块放置14 d后分别被6种水样浸泡90 d后均不会使地下水中重金属含量增加,且含量均低于《地下水质量标准》(GB/T 14848-93)Ⅲ类标准规定的含量限值,不会对生产、生活用水产生不良影响,故用于井下空区充填是完全可行的。
The cemented filling blocks made of two kinds of lime-sand ratio (cement / tailings) of 1: 4 and 1: 6 respectively were soaked in groundwater samples from different sources. The content of heavy metals in the water samples after soaking was similar to that of “groundwater quality Standard ”(GB / T 14848-93) Ⅲ class standards for the content of the limits of comparative analysis conducted to study the metal mine tailings cemented filling of groundwater pollution. The results show that the heavy metal content in groundwater will not increase after 14 days of immersion in six kinds of water samples for 14 days after being placed in the metal tailings tailings with a ratio of 1: 4 and 1: 6 The content is lower than the limit of the content specified in Class III standard of “Groundwater Quality Standard” (GB / T 14848-93), which will not adversely affect the production and domestic water use. Therefore, it is completely feasible to fill the underground gas area.