刚果(金)Sicomines铜矿水文地质条件和疏干方案研究

Study on hydrogeological conditions of Sicomines copper mine in Democratic Republic of Congo and its drainage scheme

Sicomines铜矿是世界级特大型铜矿,是在前人开采18年停产15年后重新扩大规模开发的矿山,矿区为加丹加矿脉的一部分,区域地层主要为罗安群和孔德龙古群,罗安群及其矿脉中白云石和白云质砂岩交替出现,地层、水文地质条件导致背斜向斜地层深度破碎,含水层厚度大,富水性透水性强。在详细分析矿区水文地质条件的基础上,从水文地质条件及经济技术合理性出发,确定矿坑水必须预先疏干,首先采取地表井疏干,然后采用巷道和垂直放水孔联合疏干的方案,并提出了一系列矿山防治措施,该方法在同类地区具有推广价值。

Sicomines copper mine in Congo is a super-huge copper mine in the world,and it will be exploited after being exploited for about 18 years and suspend mining for about 15 years.The mine is a part of the Katanga system.The stratigraphy is divided into the Roan and Kundelungu series.The Roan series and its ＂seriedes mines＂ are a succession of dolomites and dolomitic sandstones.The aquifer with large thickness,large area,high permeability and abundance of groundwater occurs in the mining area because the geologic character of the strata and local hydrological conditions caused deep alteration of the synclinal/antidinal structures.To deal with the problem,the hydrogeological condition of the mine field was analyzed in detail.On the basis of the hydrogeoiogical condition and from the viewpoint of technical and economical rationality,the measures for groundwater control are approached.it concludes that the mine water must be advance drained and a series of water control measures are put forward,dewatering wells from the ground surface are used to conduct drainage from the aquifer in the first stage,then dewatering galleries and the hole in roadway to conduct drainage from the overlying aquifer.This discharge way is valuable to spread in other areas with the same geological conditions.