莱芜市矿山排水对地质环境的影响分析

Effect Analysis of Mine Discharge to Geological Environment in Laiwu City

摘要:

莱芜市煤炭和铁矿资源丰富,开采历史悠久,矿山排水量较大。煤矿矿坑水中SO42-、总硬度、矿化度、F-等组分较高,对地下水水化学场构成影响,矿区附近SO42-含量大于300 mg/L的孔隙水分布面积9.98 km2。铁矿排水具有高强度、大降深、强烈疏干的特征,导致矿山背斜东翼已形成水位降落漏斗,其中水位标高120 m的漏斗面积达27.5 km2,由于矿坑排水加之水源开采,1973年以来赵庄、孟家庄、西泉河地段共发生岩溶塌陷220处,塌陷总面积8 880 m2。

Abstract:

Coal and iron resources are very rich in Laiwu city.The mining history is very long,and mine discharge amount is great.Compositions as SO2-4,total hardness,degree mineralization and F-in coal mine water are very high,which will effect the chemical field of underground water.Distribution square of crack water which SO2-4 content is above 300mg/L is 9.98km2.Iron deposit discharge has the characteristics of high intensity,large deepness and strong unwatering.Funnels have been formed in east part of mine anticl...