摘要
矿坑涌水量作为露天开采矿山疏排水方案设计的主要依据,其预测结果的准确度直接影响矿山开采设计的合理性和安全性。以位于陕西华阴的华阳川铀铌铅多金属矿为研究对象,基于矿区水文地质测绘、水文地质钻探、抽水试验、地表水和地下水动态观测等基础勘察资料,并结合矿区地形地貌特征、矿床水文地质条件和矿山设计露天境界参数,分析未来矿山露天开采后的矿坑涌水量来源,确定概化的水文地质单元及边界条件,通过"大井法"和设计频率暴雨对矿坑涌水量进行预测计算。研究结果表明:矿坑涌水量主要由露天采坑地下水涌水量、地表水汇入采坑的水量和降入采坑的水量三部分组成。预测未来露天矿坑涌水量正常期为33 758 m^(3)/d,50年一遇暴雨期为971 822 m^(3)/d。分析预测结果可为后期矿山建设中的疏排水工程设计提供参考依据。
As the main basis of drainage scheme design of open pit mining,the accuracy of water inflow prediction results directly affects the rationality and safety of mining design.This paper takes Huayangchuan Uranium-Niobium-Lead polymetallic deposit in Huayin,Shaanxi province as the research object,based on the basic survey data of hydrogeological mapping,hydrogeological drilling,pumping test and dynamic observation of surface water and groundwater in the mining area,combined with the landform characteristics of the mining area,the hydrogeological conditions of the deposit and the parameters of the mine design open pit limit were analyzed,the source of the water inflow of the mine after the future open pit mining was analyzed,the generalized hydrogeological units and boundary conditions were determined,and the water inflow of the mine was predicted and calculated by the large well method and the design frequency rainstorm.The results show that:the mine water inflow is mainly composed of three parts:the groundwater inflow of the open pit,the surface water inflow into the mining pit and the water inflow into the mining pit.The forecast of the future open pit water inflow is 33 758 m^(3)/d in the normal period and 971 822 m^(3)/d in the 50-year rainstorm period.The analysis and prediction results can provide reference for drainage engineering design in the later mine construction.
作者
张涛
李鹏
叶兴超
ZHANG Tao;LI Peng;YE Xing-chao(No.224 Brigade Co.,LTD.,China Shaanxi Nuclear Industry Group,Xi'an 710024,Shaanxi)
出处
《地下水》
2021年第5期40-42,共3页
Ground water
基金
陕西省地勘基金项目:“陕西省华阴市华阳川地区铀矿普查”(61201405236)。
关键词
露天开采
水文地质条件
矿坑充水因素
涌水量预测
Opencast working
hydrogeological condition
factor of mine water filling
prediction of water inflow
