四川环境2024，Vol.43Issue(2)：65-71,7.DOI:10.14034/j.cnki.schj.2024.02.009
废弃矿井酸性废水治理和风险管控研究
Study on Acid Waste water Treatment and Risk Control in Abandoned Mine
张娇 1谢腾蛟 2王晓龙 3廖禄云 2钟昌茂 1王承俊2
作者信息
- 1. 四川省地质工程勘察院集团有限公司,成都 610000
- 2. 四川省地质工程勘察院集团有限公司,成都 610000||四川省天源环保股份有限公司,成都 610036
- 3. 广元市朝天生态环境局,四川广元 628000
- 折叠
摘要
Abstract
In the mining process,the mine will not only change the original groundwater recharge,runoff and drainage system,but also cause serious pollution to the surrounding environment due to the groundwater from the mine,which carries heavy metal ions,sulfate ions and suspended solids.For this,an abandoned coal mine in Sichuan province was taken as a research object in this paper,with a treatment technology for acidic wastewater from the abandoned mine proposed.This technology was based on a systematic analysis on the genesis of acidic mine water.For mines with different water burst characteristics,the mine containment and multi-level aeration sedimentation risk control techniques were adopted,thereby promoting the evolution of acidic mine water towards self-repair and achieving coordinated prevention and control of surface water pollution and groundwater pollution.By adopting this technology,the groundwater quality and water level in the mining area gradually recovered,and the groundwater ecological environment gradually improved.The pH value of the mine 2# increased from 2.73 to 7.65,and acidic water was changed to the neutral one.At the same time,the iron content significantly decreased from the initial 970 mg/L to 62.6 mg/L,a decrease of 93.5％.The water level of the mine 4# increased by about 50 m and remained relatively stable after 120 days of monitoring.At the same time,with risk control measures such as head drop and aeration,the concentration of pollutants entering the downstream watershed decreased,especially the significant reduction of iron content and turbidity in surface water,and the ecological environment gradually improved.This technology has successfully achieved economy,efficiency,and sustainable management of acid mine water burst,providing reference for water pollution remediation and risk control in mining areas.关键词
废弃矿区/地下水污染/污染修复/风险管控Key words
Abandoned mining area/groundwater pollution/pollution remediation/risk control分类
资源环境引用本文复制引用
张娇,谢腾蛟,王晓龙,廖禄云,钟昌茂,王承俊..废弃矿井酸性废水治理和风险管控研究[J].四川环境,2024,43(2):65-71,7.
