青海红旗沟—深水潭金矿水文地质条件及矿坑涌水量预测研究

Hydrogeological conditions and prediction of pit water inrush in Hongqigou-Shenshuitan gold deposit in Doulan County,Qinghai Province

对青海都兰红旗沟-深水潭金矿开展的水文地质条件分析及矿坑涌水量预测研究表明:红旗沟-深水潭金矿水文地质单元可分为第四系松散岩类孔隙水和基岩裂隙水两类,后者包含块状基岩裂隙水和层状基岩裂隙水;金矿体均产于当地侵蚀基准面之上的基岩山区,因此,第四系松散岩类孔隙水不是矿床的直接充水水源;矿体多产于构造破碎带及蚀变接触破碎带中,也为块状基岩裂隙水和层状基岩裂隙水的赋存部位,因此,块状基岩裂隙水和层状基岩裂隙水是矿床的直接充水水源;红旗沟-深水潭首采区段的预测矿坑涌水量为115~265m^3/d,涌水量较小,矿坑涌水量与大气降水呈正比关系,且随季节性变化较为明显,但是涌水量总体上随着开采时间的增长而逐渐降低。

In this paper,the hydrogeological conditions and the prediction of pit water inrush are carried out for the HongqigouShenshuitan gold deposit in Doulan,Qinghai Province,and the results show that the hydrogeological unit of Hongqigou-Shenshuitan gold deposit can be divided into quaternary loose rock pore water and bedrock fractured water,the latter containing massive bedrock fractured water and layered bedrock fractured water;Gold deposits are produced in the Bedrock mountains above the local erosion datum,therefore,the fourth system of loose rock pore water is not the direct recharge water source of the deposit,the orebody is mostly produced in the tectonic crushing zone and the alteration contact crushing zone,but also for the block bedrock fractured water and layered bedrock fractured water,therefore,The fractured water of fractured water and layered bedrock of massive bedrock is the direct recharge water source of the deposit,and the prediction of the first mining section of the Hongqigou-Shenshuitan is 115 ~ 265 m3/d,the water inrush is small,the water inrush in the pit is proportional to the atmospheric precipitation,and the seasonal variation is obvious.However,in general,the water inrush gradually decreases with the increase of mining time.