摘要
硫化矿床上部氧化带的厚大铁帽,是一个特殊含水层,其中的地下水具有松散岩类孔隙水的若干特征,但又有其自身的特殊性,可称为“铁帽孔隙水”。本文阐述了青海省德尔尼铜矿区“铁帽孔隙水”的储藏状况及其补给、径流、排泄条件、动态变化和水化学等水文地质特征。指出:该矿区平硐中的涌水主要由“铁帽孔隙水”的动态变化所控制,每年6—7月或8月的初始涌水阶段其最大涌水量比平时大2—3倍;且认为“铁帽孔隙水”属 SO_4—Fe^(2+)型和强酸性水(pH=3.0—2.5)。对矿山设备有强烈腐蚀作用。
Being above the upper oxidized zone of sulfide deposits,the huge gossan is a special water—bearing bed inwhich the ground water has not only some features of loose—rock pore water but also its own characteristics and can be namedas“gossany pore water”.The hydrogeological characters of“gossany pore water”from Deerni copper mining area such asburied circumstance,conditions of recharge,runoff and discharge,dynamic change and hydrochemistry have been described inthis paper and then the author puts forward some conclusions as follows:The outflow from adits of thismining area is mainlycontrolled by the dynamic change of“gossany pore water”.The largest outflow rate at the initial stage of outflow from June toJuly or August is 2—3 times larger than usual And the“gossany pore water”belongs to SO_4-Fe^(2+)type and strong acidic(pH=3.0—2.5)water and has a Striking corrosion on mining equipments.
关键词
铜矿区
氧化带
铁帽
孔隙水
涌水
“gossany pore water”Deerni copper mining area of Qinghai province largest outflow rate corrosion
