以广东省封开县某矿区为例, 在对研究区地下水环境调查评价的基础上, 通过数值模拟计算, 预测分析了矿产 资源开发活动对地下水环境的影响程度。研究结果表明, 矿产资源开发过程中地下水流场变化较大的区域主要分 布于巷道上游约1 000 m、下游约600 m 范围内, 在该区域应定时监测水位变化情况; 稳定流场条件下, 非正常工况 选矿废水沉淀池污染物渗漏8 a 后Cu 对地下水贡献值超过0. 05 mg/ L 的距离可达149 m, 污染物超标带地下水开 始向板梯河以泄流方式排放污染物。如果能采取有效的防渗措施, 可大大降低矿产资源开发活动对矿区及周边地 下水环境的影响。

On the basis o f gr oundw ater environment investig atio n and eva luation, a numer ical simulatio n was per formed to ana2 lyze the effects of mineral resource development o n g roundw ater envir onment o f a mining ar ea in Fengkai County of Guangdong Pro vince. T he r esults show ed that the ar ea wit h sig nificant effects on gr oundwat er flow field during the mineral resource devel2 o pment is w ithin the r ang e o f 1 000 m upstr eam and 600 m downstream, and g ro undwater levels in t his ar ea need to be reg ular ly monitor ed. Under st eady g ro undwater f low and after t he po llutants in the mineral pro cessing w ast ew ater settling tank under the abnormal w or king conditio ns spill eig ht y ears, the distance that the content o f Cu in gr oundw ater exceeds 0. 05 mg/ L can reach 149 m, and gr oundw at er in the ex cessiv e pollutants zones begins t o discharg e pollutants to the Banti Riv er. Effective seepag e co nt rol measur es need to be conducted to r educe the impact of mineral resource development activ ities on g roundw ater envir on2 ment in the mining and its sur rounding areas.