松辽盆地钱家店铀矿床地浸开采水文地质条件研究

Study on the Hydrological Conditions of Qianjiadian Sandstone Type Uranium for In-situ Leaching Mining in Songliao Basin

水文地质条件是砂岩型铀矿床地浸开采的决定性因素。通过对钱Ⅱ块13~16试验矿段开展水文地质条件试验,计算出含矿含水层主要水文地质参数,并对其地浸开采可行性进行评价。研究结果表明,其水文地质结构、水位埋深、承压水头高度、单孔涌水量、黏粒含量、岩石分选性、胶结程度、含矿层与非含矿层渗透系数比值和渗透系数、矿化度有利,而含矿含水层厚度、岩石粒度、含矿含水层与矿层厚度比值对部分地段有利,总体上矿床适合于地浸开采。

Hydrological conditions are key factors for in-situ leaching mining of sandstone type uranium deposit.By hydrological testing on representative ore blocks of No.13 to No.16 section in QianⅡblock of Qianjiadian deposit,main geological parameters of ore-bearing and water-bearing layers are calculated,and in-situ mining feasibility is estimated.The main achievements show that the hydrological structure,buried depth of groundwater,height of confined water head,water inflow of single drill hole,content of clay,rock sorting,cementation degree,ratio of ore-bearing layer to ore free layer,osmotic coefficient and degree of mineralization are favorable.Thickness of ore bearing aquifer,granularity of rock and ration of ore bearing aquifer to thickness of ledge are favorable in partial areas.Generally,the deposit is fit for in-situ leaching mining.