全尾砂结构流胶结充填对地下水质影响的试验研究

Experimental Study on the Effect of the Filling Materials with Whole Tailings Structure Flow Cemented Filling on Underground Water Quality

为了探讨全尾砂结构流矿井胶结充填是否会对地下水质造成污染,用尾砂、水泥按4∶1的比例制成充填体试块在不同来源水样中浸泡。浸泡不同时间段后,分别取样进行水质监测。对照《地下水质量标准》(GB/T 14848-93)Ⅲ类标准规定的含量限值进行监测结果分析。结果表明:全尾砂结构流胶结充填体试块放置21 d后分别被8种水样浸泡90 d后均不会对地下水水质造成污染,其用于井下空区充填是完全可行的。虽然pH值及Fe、Mn、Zn、Cr等离子含量出现起伏变化,但浸泡90 d后其溶液含量均低于《地下水质量标准》(GB/T 14848-93)Ⅲ类标准规定的含量限值,故不会对生产、生活用水产生不良影响。全尾砂结构流胶结充填使井下水中重金属含量有所下降,水质得到改善。

To investigate the effect of whole tailings structure flow cemented filling on underground water quality,cemented test block were made by tails and cement in the ratio of 4：1. Then the blocks were immerged into 8 waters from different sources respectively. The water quality monitoring of water samples from different periods of time were tested and compare with that of“Groundwater quality standard”（GB/T 14848-93）limit content class III standard. Results showed that the samples whole tailings structure flow cemented filling block placed after 21 d were soaked by 8 waters 90 d can not cause pollution to the groundwater,which is used for underground filling is feasible completely. Although the pH value and the content of Fe,Mn,Zn,Cr ions fluctuant change,the concentrations of solution after soaking for 90 d were meet the limit content class III standards of GB/T 14848-93,which may have not adverse effects on the production and living water. So whole tailings structure flow cemented filling may improve the water quality through decreasing the content of heavy metal in water.