鞍山市大孤山矿区地质环境问题及防治措施

Geological Environment Problems and Prevention Measures of Dagushan Mining Area in Anshan City

以鞍山大孤山铁矿现场调查资料为基础,对矿山开挖形成的高陡边坡和尾矿库废石堆积边坡潜在的地质灾害进行评估。然后通过对比矿区周边地下水位的变化探索矿山开挖对地下水资源系统的破坏,最后介绍了矿山对生态环境的污染。结果表明:矿区不稳定边坡主要存在滑坡和崩塌灾害风险,矿山开采对矿区西侧地下水位影响严重,近5 a来水位下降0.7~2.77 m不等。结合不同的地质环境问题提出针对性的防治措施,对全面改善矿区地质环境具有重要意义。

Based on the field investigation data of Dagushan Iron Mine in Anshan,the potential geo⁃logical disasters of high and steep slope formed by mining excavation and waste rock accumulation slope of tailing pond are evaluated.Then by comparing the changes of groundwater level around the mining area to ex⁃plore the damage of mine excavation to the groundwater resources balance system,and finally introduces the pollution of the mine to the ecological environment.The results show that there are mainly landslide and col⁃lapse hazards in the unstable slope of the mining area.The mining has a serious impact on the groundwater level in the west side of the mining area,and the water level has decreased by 0.7~2.77 m in the past five years.Combined with different geological environment problems,it is of great significance to put forward tar⁃geted prevention measures to comprehensively improve the geological environment of the mining area.